src/libFLAC/stream_encoder.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006  Josh Coalson
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * - Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * - Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * - Neither the name of the Xiph.org Foundation nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_CONFIG_H
  33 #  include <config.h>
  34 #endif
  35
  36 #if defined _MSC_VER || defined __MINGW32__
  37 #include <io.h> /* for _setmode() */
  38 #include <fcntl.h> /* for _O_BINARY */
  39 #endif
  40 #if defined __CYGWIN__ || defined __EMX__
  41 #include <io.h> /* for setmode(), O_BINARY */
  42 #include <fcntl.h> /* for _O_BINARY */
  43 #endif
  44 #include <limits.h>
  45 #include <stdio.h>
  46 #include <stdlib.h> /* for malloc() */
  47 #include <string.h> /* for memcpy() */
  48 #include <sys/types.h> /* for off_t */
  49 #if defined _MSC_VER || defined __MINGW32__
  50 #if _MSC_VER <= 1200 /* @@@ [2G limit] */
  51 #define fseeko fseek
  52 #define ftello ftell
  53 #endif
  54 #endif
  55 #include "FLAC/assert.h"
  56 #include "FLAC/stream_decoder.h"
  57 #include "protected/stream_encoder.h"
  58 #include "private/bitbuffer.h"
  59 #include "private/bitmath.h"
  60 #include "private/crc.h"
  61 #include "private/cpu.h"
  62 #include "private/fixed.h"
  63 #include "private/format.h"
  64 #include "private/lpc.h"
  65 #include "private/md5.h"
  66 #include "private/memory.h"
  67 #ifdef FLAC__HAS_OGG
  68 #include "private/ogg_helper.h"
  69 #endif
  70 #include "private/stream_encoder_framing.h"
  71 #include "private/window.h"
  72
  73 #ifdef min
  74 #undef min
  75 #endif
  76 #define min(x,y) ((x)<(y)?(x):(y))
  77
  78 #ifdef max
  79 #undef max
  80 #endif
  81 #define max(x,y) ((x)>(y)?(x):(y))
  82
  83 typedef struct {
  84         FLAC__int32 *data[FLAC__MAX_CHANNELS];
  85         unsigned size; /* of each data[] in samples */
  86         unsigned tail;
  87 } verify_input_fifo;
  88
  89 typedef struct {
  90         const FLAC__byte *data;
  91         unsigned capacity;
  92         unsigned bytes;
  93 } verify_output;
  94
  95 typedef enum {
  96         ENCODER_IN_MAGIC = 0,
  97         ENCODER_IN_METADATA = 1,
  98         ENCODER_IN_AUDIO = 2
  99 } EncoderStateHint;
 100
 101 static struct CompressionLevels {
 102         FLAC__bool do_mid_side_stereo;
 103         FLAC__bool loose_mid_side_stereo;
 104         const char *apodization;
 105         unsigned max_lpc_order;
 106         unsigned qlp_coeff_precision;
 107         FLAC__bool do_qlp_coeff_prec_search;
 108         FLAC__bool do_escape_coding;
 109         FLAC__bool do_exhaustive_model_search;
 110         unsigned min_residual_partition_order;
 111         unsigned max_residual_partition_order;
 112         unsigned rice_parameter_search_dist;
 113 } compression_levels_[] = {
 114         { false, false, "tukey(0.5)",  0, 0, false, false, false, 2, 2, 0 },
 115         { true , true , "tukey(0.5)",  0, 0, false, false, false, 2, 2, 0 },
 116         { true , false, "tukey(0.5)",  0, 0, false, false, false, 0, 3, 0 },
 117         { false, false, "tukey(0.5)",  6, 0, false, false, false, 3, 3, 0 },
 118         { true , true , "tukey(0.5)",  8, 0, false, false, false, 3, 3, 0 },
 119         { true , false, "tukey(0.5)",  8, 0, false, false, false, 3, 3, 0 },
 120         { true , false, "tukey(0.5)",  8, 0, false, false, false, 0, 4, 0 },
 121         { true , false, "tukey(0.5)",  8, 0, false, false, true , 0, 6, 0 },
 122         { true , false, "tukey(0.5)", 12, 0, false, false, true , 0, 6, 0 }
 123 };
 124
 125
 126 /***********************************************************************
 127  *
 128  * Private class method prototypes
 129  *
 130  ***********************************************************************/
 131
 132 static void set_defaults_(FLAC__StreamEncoder *encoder);
 133 static void free_(FLAC__StreamEncoder *encoder);
 134 static FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize);
 135 static FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples);
 136 static FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples);
 137 static void update_metadata_(const FLAC__StreamEncoder *encoder);
 138 #if FLAC__HAS_OGG
 139 static void update_ogg_metadata_(FLAC__StreamEncoder *encoder);
 140 #endif
 141 static FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block);
 142 static FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block);
 143
 144 static FLAC__bool process_subframe_(
 145         FLAC__StreamEncoder *encoder,
 146         unsigned min_partition_order,
 147         unsigned max_partition_order,
 148         FLAC__bool precompute_partition_sums,
 149         const FLAC__FrameHeader *frame_header,
 150         unsigned subframe_bps,
 151         const FLAC__int32 integer_signal[],
 152 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 153         const FLAC__real real_signal[],
 154 #endif
 155         FLAC__Subframe *subframe[2],
 156         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
 157         FLAC__int32 *residual[2],
 158         unsigned *best_subframe,
 159         unsigned *best_bits
 160 );
 161
 162 static FLAC__bool add_subframe_(
 163         FLAC__StreamEncoder *encoder,
 164         const FLAC__FrameHeader *frame_header,
 165         unsigned subframe_bps,
 166         const FLAC__Subframe *subframe,
 167         FLAC__BitBuffer *frame
 168 );
 169
 170 static unsigned evaluate_constant_subframe_(
 171         const FLAC__int32 signal,
 172         unsigned subframe_bps,
 173         FLAC__Subframe *subframe
 174 );
 175
 176 static unsigned evaluate_fixed_subframe_(
 177         FLAC__StreamEncoder *encoder,
 178         const FLAC__int32 signal[],
 179         FLAC__int32 residual[],
 180         FLAC__uint32 abs_residual[],
 181         FLAC__uint64 abs_residual_partition_sums[],
 182         unsigned raw_bits_per_partition[],
 183         unsigned blocksize,
 184         unsigned subframe_bps,
 185         unsigned order,
 186         unsigned rice_parameter,
 187         unsigned min_partition_order,
 188         unsigned max_partition_order,
 189         FLAC__bool precompute_partition_sums,
 190         FLAC__bool do_escape_coding,
 191         unsigned rice_parameter_search_dist,
 192         FLAC__Subframe *subframe,
 193         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
 194 );
 195
 196 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 197 static unsigned evaluate_lpc_subframe_(
 198         FLAC__StreamEncoder *encoder,
 199         const FLAC__int32 signal[],
 200         FLAC__int32 residual[],
 201         FLAC__uint32 abs_residual[],
 202         FLAC__uint64 abs_residual_partition_sums[],
 203         unsigned raw_bits_per_partition[],
 204         const FLAC__real lp_coeff[],
 205         unsigned blocksize,
 206         unsigned subframe_bps,
 207         unsigned order,
 208         unsigned qlp_coeff_precision,
 209         unsigned rice_parameter,
 210         unsigned min_partition_order,
 211         unsigned max_partition_order,
 212         FLAC__bool precompute_partition_sums,
 213         FLAC__bool do_escape_coding,
 214         unsigned rice_parameter_search_dist,
 215         FLAC__Subframe *subframe,
 216         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
 217 );
 218 #endif
 219
 220 static unsigned evaluate_verbatim_subframe_(
 221         const FLAC__int32 signal[],
 222         unsigned blocksize,
 223         unsigned subframe_bps,
 224         FLAC__Subframe *subframe
 225 );
 226
 227 static unsigned find_best_partition_order_(
 228         struct FLAC__StreamEncoderPrivate *private_,
 229         const FLAC__int32 residual[],
 230         FLAC__uint32 abs_residual[],
 231         FLAC__uint64 abs_residual_partition_sums[],
 232         unsigned raw_bits_per_partition[],
 233         unsigned residual_samples,
 234         unsigned predictor_order,
 235         unsigned rice_parameter,
 236         unsigned min_partition_order,
 237         unsigned max_partition_order,
 238         FLAC__bool precompute_partition_sums,
 239         FLAC__bool do_escape_coding,
 240         unsigned rice_parameter_search_dist,
 241         FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice
 242 );
 243
 244 static void precompute_partition_info_sums_(
 245         const FLAC__uint32 abs_residual[],
 246         FLAC__uint64 abs_residual_partition_sums[],
 247         unsigned residual_samples,
 248         unsigned predictor_order,
 249         unsigned min_partition_order,
 250         unsigned max_partition_order
 251 );
 252
 253 static void precompute_partition_info_escapes_(
 254         const FLAC__int32 residual[],
 255         unsigned raw_bits_per_partition[],
 256         unsigned residual_samples,
 257         unsigned predictor_order,
 258         unsigned min_partition_order,
 259         unsigned max_partition_order
 260 );
 261
 262 #ifdef DONT_ESTIMATE_RICE_BITS
 263 static FLAC__bool set_partitioned_rice_(
 264         const FLAC__uint32 abs_residual[],
 265         const FLAC__int32 residual[],
 266         const unsigned residual_samples,
 267         const unsigned predictor_order,
 268         const unsigned suggested_rice_parameter,
 269         const unsigned rice_parameter_search_dist,
 270         const unsigned partition_order,
 271         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
 272         unsigned *bits
 273 );
 274
 275 static FLAC__bool set_partitioned_rice_with_precompute_(
 276         const FLAC__int32 residual[],
 277         const FLAC__uint64 abs_residual_partition_sums[],
 278         const unsigned raw_bits_per_partition[],
 279         const unsigned residual_samples,
 280         const unsigned predictor_order,
 281         const unsigned suggested_rice_parameter,
 282         const unsigned rice_parameter_search_dist,
 283         const unsigned partition_order,
 284         const FLAC__bool search_for_escapes,
 285         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
 286         unsigned *bits
 287 );
 288 #else
 289 static FLAC__bool set_partitioned_rice_(
 290         const FLAC__uint32 abs_residual[],
 291         const unsigned residual_samples,
 292         const unsigned predictor_order,
 293         const unsigned suggested_rice_parameter,
 294         const unsigned rice_parameter_search_dist,
 295         const unsigned partition_order,
 296         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
 297         unsigned *bits
 298 );
 299
 300 static FLAC__bool set_partitioned_rice_with_precompute_(
 301         const FLAC__uint32 abs_residual[],
 302         const FLAC__uint64 abs_residual_partition_sums[],
 303         const unsigned raw_bits_per_partition[],
 304         const unsigned residual_samples,
 305         const unsigned predictor_order,
 306         const unsigned suggested_rice_parameter,
 307         const unsigned rice_parameter_search_dist,
 308         const unsigned partition_order,
 309         const FLAC__bool search_for_escapes,
 310         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
 311         unsigned *bits
 312 );
 313 #endif
 314
 315 static unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples);
 316
 317 /* verify-related routines: */
 318 static void append_to_verify_fifo_(
 319         verify_input_fifo *fifo,
 320         const FLAC__int32 * const input[],
 321         unsigned input_offset,
 322         unsigned channels,
 323         unsigned wide_samples
 324 );
 325
 326 static void append_to_verify_fifo_interleaved_(
 327         verify_input_fifo *fifo,
 328         const FLAC__int32 input[],
 329         unsigned input_offset,
 330         unsigned channels,
 331         unsigned wide_samples
 332 );
 333
 334 static FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
 335 static FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 336 static void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 337 static void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 338
 339 static FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
 340 static FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
 341 static FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
 342 static FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data);
 343 static FILE *get_binary_stdout_();
 344
 345
 346 /***********************************************************************
 347  *
 348  * Private class data
 349  *
 350  ***********************************************************************/
 351
 352 typedef struct FLAC__StreamEncoderPrivate {
 353         unsigned input_capacity;                          /* current size (in samples) of the signal and residual buffers */
 354         FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS];  /* the integer version of the input signal */
 355         FLAC__int32 *integer_signal_mid_side[2];          /* the integer version of the mid-side input signal (stereo only) */
 356 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 357         FLAC__real *real_signal[FLAC__MAX_CHANNELS];      /* the floating-point version of the input signal */
 358         FLAC__real *real_signal_mid_side[2];              /* the floating-point version of the mid-side input signal (stereo only) */
 359         FLAC__real *window[FLAC__MAX_APODIZATION_FUNCTIONS]; /* the pre-computed floating-point window for each apodization function */
 360         FLAC__real *windowed_signal;                      /* the real_signal[] * current window[] */
 361 #endif
 362         unsigned subframe_bps[FLAC__MAX_CHANNELS];        /* the effective bits per sample of the input signal (stream bps - wasted bits) */
 363         unsigned subframe_bps_mid_side[2];                /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */
 364         FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */
 365         FLAC__int32 *residual_workspace_mid_side[2][2];
 366         FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2];
 367         FLAC__Subframe subframe_workspace_mid_side[2][2];
 368         FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2];
 369         FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2];
 370         FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace[FLAC__MAX_CHANNELS][2];
 371         FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace_mid_side[FLAC__MAX_CHANNELS][2];
 372         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr[FLAC__MAX_CHANNELS][2];
 373         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr_mid_side[FLAC__MAX_CHANNELS][2];
 374         unsigned best_subframe[FLAC__MAX_CHANNELS];       /* index into the above workspaces */
 375         unsigned best_subframe_mid_side[2];
 376         unsigned best_subframe_bits[FLAC__MAX_CHANNELS];  /* size in bits of the best subframe for each channel */
 377         unsigned best_subframe_bits_mid_side[2];
 378         FLAC__uint32 *abs_residual;                       /* workspace where abs(candidate residual) is stored */
 379         FLAC__uint64 *abs_residual_partition_sums;        /* workspace where the sum of abs(candidate residual) for each partition is stored */
 380         unsigned *raw_bits_per_partition;                 /* workspace where the sum of silog2(candidate residual) for each partition is stored */
 381         FLAC__BitBuffer *frame;                           /* the current frame being worked on */
 382         unsigned loose_mid_side_stereo_frames;            /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
 383         unsigned loose_mid_side_stereo_frame_count;       /* number of frames using the current channel assignment */
 384         FLAC__ChannelAssignment last_channel_assignment;
 385         FLAC__StreamMetadata streaminfo;                  /* scratchpad for STREAMINFO as it is built */
 386         FLAC__StreamMetadata_SeekTable *seek_table;       /* pointer into encoder->protected_->metadata_ where the seek table is */
 387         unsigned current_sample_number;
 388         unsigned current_frame_number;
 389         struct FLAC__MD5Context md5context;
 390         FLAC__CPUInfo cpuinfo;
 391 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 392         unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
 393 #else
 394         unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
 395 #endif
 396 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 397         void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
 398         void (*local_lpc_compute_residual_from_qlp_coefficients)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
 399         void (*local_lpc_compute_residual_from_qlp_coefficients_64bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
 400         void (*local_lpc_compute_residual_from_qlp_coefficients_16bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
 401 #endif
 402         FLAC__bool use_wide_by_block;          /* use slow 64-bit versions of some functions because of the block size */
 403         FLAC__bool use_wide_by_partition;      /* use slow 64-bit versions of some functions because of the min partition order and blocksize */
 404         FLAC__bool use_wide_by_order;          /* use slow 64-bit versions of some functions because of the lpc order */
 405         FLAC__bool precompute_partition_sums;  /* our initial guess as to whether precomputing the partitions sums will be a speed improvement */
 406         FLAC__bool disable_constant_subframes;
 407         FLAC__bool disable_fixed_subframes;
 408         FLAC__bool disable_verbatim_subframes;
 409 #if FLAC__HAS_OGG
 410         FLAC__bool is_ogg;
 411 #endif
 412         FLAC__StreamEncoderReadCallback read_callback; /* currently only needed for Ogg FLAC */
 413         FLAC__StreamEncoderSeekCallback seek_callback;
 414         FLAC__StreamEncoderTellCallback tell_callback;
 415         FLAC__StreamEncoderWriteCallback write_callback;
 416         FLAC__StreamEncoderMetadataCallback metadata_callback;
 417         FLAC__StreamEncoderProgressCallback progress_callback;
 418         void *client_data;
 419         unsigned first_seekpoint_to_check;
 420         FILE *file;                            /* only used when encoding to a file */
 421         FLAC__uint64 bytes_written;
 422         FLAC__uint64 samples_written;
 423         unsigned frames_written;
 424         unsigned total_frames_estimate;
 425         /* unaligned (original) pointers to allocated data */
 426         FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS];
 427         FLAC__int32 *integer_signal_mid_side_unaligned[2];
 428 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 429         FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS];
 430         FLAC__real *real_signal_mid_side_unaligned[2];
 431         FLAC__real *window_unaligned[FLAC__MAX_APODIZATION_FUNCTIONS];
 432         FLAC__real *windowed_signal_unaligned;
 433 #endif
 434         FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2];
 435         FLAC__int32 *residual_workspace_mid_side_unaligned[2][2];
 436         FLAC__uint32 *abs_residual_unaligned;
 437         FLAC__uint64 *abs_residual_partition_sums_unaligned;
 438         unsigned *raw_bits_per_partition_unaligned;
 439         /*
 440          * These fields have been moved here from private function local
 441          * declarations merely to save stack space during encoding.
 442          */
 443 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 444         FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from process_subframe_() */
 445 #endif
 446         FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_extra[2]; /* from find_best_partition_order_() */
 447         /*
 448          * The data for the verify section
 449          */
 450         struct {
 451                 FLAC__StreamDecoder *decoder;
 452                 EncoderStateHint state_hint;
 453                 FLAC__bool needs_magic_hack;
 454                 verify_input_fifo input_fifo;
 455                 verify_output output;
 456                 struct {
 457                         FLAC__uint64 absolute_sample;
 458                         unsigned frame_number;
 459                         unsigned channel;
 460                         unsigned sample;
 461                         FLAC__int32 expected;
 462                         FLAC__int32 got;
 463                 } error_stats;
 464         } verify;
 465         FLAC__bool is_being_deleted; /* if true, call to ..._finish() from ..._delete() will not call the callbacks */
 466 } FLAC__StreamEncoderPrivate;
 467
 468 /***********************************************************************
 469  *
 470  * Public static class data
 471  *
 472  ***********************************************************************/
 473
 474 FLAC_API const char * const FLAC__StreamEncoderStateString[] = {
 475         "FLAC__STREAM_ENCODER_OK",
 476         "FLAC__STREAM_ENCODER_UNINITIALIZED",
 477         "FLAC__STREAM_ENCODER_OGG_ERROR",
 478         "FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR",
 479         "FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA",
 480         "FLAC__STREAM_ENCODER_CLIENT_ERROR",
 481         "FLAC__STREAM_ENCODER_IO_ERROR",
 482         "FLAC__STREAM_ENCODER_FRAMING_ERROR",
 483         "FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR"
 484 };
 485
 486 FLAC_API const char * const FLAC__StreamEncoderInitStatusString[] = {
 487         "FLAC__STREAM_ENCODER_INIT_STATUS_OK",
 488         "FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR",
 489         "FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
 490         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS",
 491         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS",
 492         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE",
 493         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE",
 494         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE",
 495         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER",
 496         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION",
 497         "FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER",
 498         "FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE",
 499         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA",
 500         "FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED"
 501 };
 502
 503 FLAC_API const char * const FLAC__treamEncoderReadStatusString[] = {
 504         "FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE",
 505         "FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM",
 506         "FLAC__STREAM_ENCODER_READ_STATUS_ABORT",
 507         "FLAC__STREAM_ENCODER_READ_STATUS_UNSUPPORTED"
 508 };
 509
 510 FLAC_API const char * const FLAC__StreamEncoderWriteStatusString[] = {
 511         "FLAC__STREAM_ENCODER_WRITE_STATUS_OK",
 512         "FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR"
 513 };
 514
 515 FLAC_API const char * const FLAC__StreamEncoderSeekStatusString[] = {
 516         "FLAC__STREAM_ENCODER_SEEK_STATUS_OK",
 517         "FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR",
 518         "FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED"
 519 };
 520
 521 FLAC_API const char * const FLAC__StreamEncoderTellStatusString[] = {
 522         "FLAC__STREAM_ENCODER_TELL_STATUS_OK",
 523         "FLAC__STREAM_ENCODER_TELL_STATUS_ERROR",
 524         "FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED"
 525 };
 526
 527 /***********************************************************************
 528  *
 529  * Class constructor/destructor
 530  *
 531  */
 532 FLAC_API FLAC__StreamEncoder *FLAC__stream_encoder_new()
 533 {
 534         FLAC__StreamEncoder *encoder;
 535         unsigned i;
 536
 537         FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
 538
 539         encoder = (FLAC__StreamEncoder*)calloc(1, sizeof(FLAC__StreamEncoder));
 540         if(encoder == 0) {
 541                 return 0;
 542         }
 543
 544         encoder->protected_ = (FLAC__StreamEncoderProtected*)calloc(1, sizeof(FLAC__StreamEncoderProtected));
 545         if(encoder->protected_ == 0) {
 546                 free(encoder);
 547                 return 0;
 548         }
 549
 550         encoder->private_ = (FLAC__StreamEncoderPrivate*)calloc(1, sizeof(FLAC__StreamEncoderPrivate));
 551         if(encoder->private_ == 0) {
 552                 free(encoder->protected_);
 553                 free(encoder);
 554                 return 0;
 555         }
 556
 557         encoder->private_->frame = FLAC__bitbuffer_new();
 558         if(encoder->private_->frame == 0) {
 559                 free(encoder->private_);
 560                 free(encoder->protected_);
 561                 free(encoder);
 562                 return 0;
 563         }
 564
 565         encoder->private_->file = 0;
 566
 567         set_defaults_(encoder);
 568
 569         encoder->private_->is_being_deleted = false;
 570
 571         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
 572                 encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0];
 573                 encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1];
 574         }
 575         for(i = 0; i < 2; i++) {
 576                 encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0];
 577                 encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1];
 578         }
 579         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
 580                 encoder->private_->partitioned_rice_contents_workspace_ptr[i][0] = &encoder->private_->partitioned_rice_contents_workspace[i][0];
 581                 encoder->private_->partitioned_rice_contents_workspace_ptr[i][1] = &encoder->private_->partitioned_rice_contents_workspace[i][1];
 582         }
 583         for(i = 0; i < 2; i++) {
 584                 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][0] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0];
 585                 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][1] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1];
 586         }
 587
 588         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
 589                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
 590                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
 591         }
 592         for(i = 0; i < 2; i++) {
 593                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
 594                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
 595         }
 596         for(i = 0; i < 2; i++)
 597                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_extra[i]);
 598
 599         encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
 600
 601         return encoder;
 602 }
 603
 604 FLAC_API void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
 605 {
 606         unsigned i;
 607
 608         FLAC__ASSERT(0 != encoder);
 609         FLAC__ASSERT(0 != encoder->protected_);
 610         FLAC__ASSERT(0 != encoder->private_);
 611         FLAC__ASSERT(0 != encoder->private_->frame);
 612
 613         encoder->private_->is_being_deleted = true;
 614
 615         (void)FLAC__stream_encoder_finish(encoder);
 616
 617         if(0 != encoder->private_->verify.decoder)
 618                 FLAC__stream_decoder_delete(encoder->private_->verify.decoder);
 619
 620         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
 621                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
 622                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
 623         }
 624         for(i = 0; i < 2; i++) {
 625                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
 626                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
 627         }
 628         for(i = 0; i < 2; i++)
 629                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_extra[i]);
 630
 631         FLAC__bitbuffer_delete(encoder->private_->frame);
 632         free(encoder->private_);
 633         free(encoder->protected_);
 634         free(encoder);
 635 }
 636
 637 /***********************************************************************
 638  *
 639  * Public class methods
 640  *
 641  ***********************************************************************/
 642
 643 static FLAC__StreamEncoderInitStatus init_stream_internal_(
 644         FLAC__StreamEncoder *encoder,
 645         FLAC__StreamEncoderReadCallback read_callback,
 646         FLAC__StreamEncoderWriteCallback write_callback,
 647         FLAC__StreamEncoderSeekCallback seek_callback,
 648         FLAC__StreamEncoderTellCallback tell_callback,
 649         FLAC__StreamEncoderMetadataCallback metadata_callback,
 650         void *client_data,
 651         FLAC__bool is_ogg
 652 )
 653 {
 654         unsigned i;
 655         FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment, metadata_picture_has_type1, metadata_picture_has_type2;
 656
 657         FLAC__ASSERT(0 != encoder);
 658
 659         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
 660                 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
 661
 662 #ifndef FLAC__HAS_OGG
 663         if(is_ogg)
 664                 return FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
 665 #endif
 666
 667         if(0 == write_callback || (seek_callback && 0 == tell_callback))
 668                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS;
 669
 670         if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS)
 671                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS;
 672
 673         if(encoder->protected_->channels != 2) {
 674                 encoder->protected_->do_mid_side_stereo = false;
 675                 encoder->protected_->loose_mid_side_stereo = false;
 676         }
 677         else if(!encoder->protected_->do_mid_side_stereo)
 678                 encoder->protected_->loose_mid_side_stereo = false;
 679
 680         if(encoder->protected_->bits_per_sample >= 32)
 681                 encoder->protected_->do_mid_side_stereo = false; /* since we currenty do 32-bit math, the side channel would have 33 bps and overflow */
 682
 683         if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE)
 684                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE;
 685
 686         if(!FLAC__format_sample_rate_is_valid(encoder->protected_->sample_rate))
 687                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE;
 688
 689         if(encoder->protected_->blocksize == 0) {
 690                 if(encoder->protected_->max_lpc_order == 0)
 691                         encoder->protected_->blocksize = 1152;
 692                 else
 693                         encoder->protected_->blocksize = 4608;
 694         }
 695
 696         if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE)
 697                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE;
 698
 699         if(encoder->protected_->max_lpc_order > FLAC__MAX_LPC_ORDER)
 700                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER;
 701
 702         if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order)
 703                 return FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER;
 704
 705         if(encoder->protected_->qlp_coeff_precision == 0) {
 706                 if(encoder->protected_->bits_per_sample < 16) {
 707                         /* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */
 708                         /* @@@ until then we'll make a guess */
 709                         encoder->protected_->qlp_coeff_precision = max(FLAC__MIN_QLP_COEFF_PRECISION, 2 + encoder->protected_->bits_per_sample / 2);
 710                 }
 711                 else if(encoder->protected_->bits_per_sample == 16) {
 712                         if(encoder->protected_->blocksize <= 192)
 713                                 encoder->protected_->qlp_coeff_precision = 7;
 714                         else if(encoder->protected_->blocksize <= 384)
 715                                 encoder->protected_->qlp_coeff_precision = 8;
 716                         else if(encoder->protected_->blocksize <= 576)
 717                                 encoder->protected_->qlp_coeff_precision = 9;
 718                         else if(encoder->protected_->blocksize <= 1152)
 719                                 encoder->protected_->qlp_coeff_precision = 10;
 720                         else if(encoder->protected_->blocksize <= 2304)
 721                                 encoder->protected_->qlp_coeff_precision = 11;
 722                         else if(encoder->protected_->blocksize <= 4608)
 723                                 encoder->protected_->qlp_coeff_precision = 12;
 724                         else
 725                                 encoder->protected_->qlp_coeff_precision = 13;
 726                 }
 727                 else {
 728                         if(encoder->protected_->blocksize <= 384)
 729                                 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-2;
 730                         else if(encoder->protected_->blocksize <= 1152)
 731                                 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-1;
 732                         else
 733                                 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
 734                 }
 735                 FLAC__ASSERT(encoder->protected_->qlp_coeff_precision <= FLAC__MAX_QLP_COEFF_PRECISION);
 736         }
 737         else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision > FLAC__MAX_QLP_COEFF_PRECISION)
 738                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION;
 739
 740         if(encoder->protected_->streamable_subset) {
 741                 if(
 742                         encoder->protected_->blocksize != 192 &&
 743                         encoder->protected_->blocksize != 576 &&
 744                         encoder->protected_->blocksize != 1152 &&
 745                         encoder->protected_->blocksize != 2304 &&
 746                         encoder->protected_->blocksize != 4608 &&
 747                         encoder->protected_->blocksize != 256 &&
 748                         encoder->protected_->blocksize != 512 &&
 749                         encoder->protected_->blocksize != 1024 &&
 750                         encoder->protected_->blocksize != 2048 &&
 751                         encoder->protected_->blocksize != 4096 &&
 752                         encoder->protected_->blocksize != 8192 &&
 753                         encoder->protected_->blocksize != 16384
 754                 )
 755                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
 756                 if(
 757                         encoder->protected_->sample_rate != 8000 &&
 758                         encoder->protected_->sample_rate != 16000 &&
 759                         encoder->protected_->sample_rate != 22050 &&
 760                         encoder->protected_->sample_rate != 24000 &&
 761                         encoder->protected_->sample_rate != 32000 &&
 762                         encoder->protected_->sample_rate != 44100 &&
 763                         encoder->protected_->sample_rate != 48000 &&
 764                         encoder->protected_->sample_rate != 96000
 765                 )
 766                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
 767                 if(
 768                         encoder->protected_->bits_per_sample != 8 &&
 769                         encoder->protected_->bits_per_sample != 12 &&
 770                         encoder->protected_->bits_per_sample != 16 &&
 771                         encoder->protected_->bits_per_sample != 20 &&
 772                         encoder->protected_->bits_per_sample != 24
 773                 )
 774                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
 775                 if(encoder->protected_->max_residual_partition_order > FLAC__SUBSET_MAX_RICE_PARTITION_ORDER)
 776                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
 777                 if(
 778                         encoder->protected_->sample_rate <= 48000 &&
 779                         (
 780                                 encoder->protected_->blocksize > FLAC__SUBSET_MAX_BLOCK_SIZE_48000HZ ||
 781                                 encoder->protected_->max_lpc_order > FLAC__SUBSET_MAX_LPC_ORDER_48000HZ
 782                         )
 783                 ) {
 784                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
 785                 }
 786         }
 787
 788         if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 789                 encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1;
 790         if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order)
 791                 encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order;
 792
 793 #if FLAC__HAS_OGG
 794         /* reorder metadata if necessary to ensure that any VORBIS_COMMENT is the first, according to the mapping spec */
 795         if(is_ogg && 0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 1) {
 796                 unsigned i;
 797                 for(i = 1; i < encoder->protected_->num_metadata_blocks; i++) {
 798                         if(0 != encoder->protected_->metadata[i] && encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
 799                                 FLAC__StreamMetadata *vc = encoder->protected_->metadata[i];
 800                                 for( ; i > 0; i--)
 801                                         encoder->protected_->metadata[i] = encoder->protected_->metadata[i-1];
 802                                 encoder->protected_->metadata[0] = vc;
 803                                 break;
 804                         }
 805                 }
 806         }
 807 #endif
 808         /* keep track of any SEEKTABLE block */
 809         if(0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0) {
 810                 unsigned i;
 811                 for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
 812                         if(0 != encoder->protected_->metadata[i] && encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_SEEKTABLE) {
 813                                 encoder->private_->seek_table = &encoder->protected_->metadata[i]->data.seek_table;
 814                                 break; /* take only the first one */
 815                         }
 816                 }
 817         }
 818
 819         /* validate metadata */
 820         if(0 == encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0)
 821                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 822         metadata_has_seektable = false;
 823         metadata_has_vorbis_comment = false;
 824         metadata_picture_has_type1 = false;
 825         metadata_picture_has_type2 = false;
 826         for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
 827                 const FLAC__StreamMetadata *m = encoder->protected_->metadata[i];
 828                 if(m->type == FLAC__METADATA_TYPE_STREAMINFO)
 829                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 830                 else if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) {
 831                         if(metadata_has_seektable) /* only one is allowed */
 832                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 833                         metadata_has_seektable = true;
 834                         if(!FLAC__format_seektable_is_legal(&m->data.seek_table))
 835                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 836                 }
 837                 else if(m->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
 838                         if(metadata_has_vorbis_comment) /* only one is allowed */
 839                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 840                         metadata_has_vorbis_comment = true;
 841                 }
 842                 else if(m->type == FLAC__METADATA_TYPE_CUESHEET) {
 843                         if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0))
 844                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 845                 }
 846                 else if(m->type == FLAC__METADATA_TYPE_PICTURE) {
 847                         if(!FLAC__format_picture_is_legal(&m->data.picture, /*violation=*/0))
 848                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 849                         if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
 850                                 if(metadata_picture_has_type1) /* there should only be 1 per stream */
 851                                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 852                                 metadata_picture_has_type1 = true;
 853                                 /* standard icon must be 32x32 pixel PNG */
 854                                 if(
 855                                         m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD &&
 856                                         (
 857                                                 (strcmp(m->data.picture.mime_type, "image/png") && strcmp(m->data.picture.mime_type, "-->")) ||
 858                                                 m->data.picture.width != 32 ||
 859                                                 m->data.picture.height != 32
 860                                         )
 861                                 )
 862                                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 863                         }
 864                         else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
 865                                 if(metadata_picture_has_type2) /* there should only be 1 per stream */
 866                                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
 867                                 metadata_picture_has_type2 = true;
 868                         }
 869                 }
 870         }
 871
 872         encoder->private_->input_capacity = 0;
 873         for(i = 0; i < encoder->protected_->channels; i++) {
 874                 encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0;
 875 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 876                 encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0;
 877 #endif
 878         }
 879         for(i = 0; i < 2; i++) {
 880                 encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0;
 881 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 882                 encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0;
 883 #endif
 884         }
 885 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 886         for(i = 0; i < encoder->protected_->num_apodizations; i++)
 887                 encoder->private_->window_unaligned[i] = encoder->private_->window[i] = 0;
 888         encoder->private_->windowed_signal_unaligned = encoder->private_->windowed_signal = 0;
 889 #endif
 890         for(i = 0; i < encoder->protected_->channels; i++) {
 891                 encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0;
 892                 encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0;
 893                 encoder->private_->best_subframe[i] = 0;
 894         }
 895         for(i = 0; i < 2; i++) {
 896                 encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0;
 897                 encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0;
 898                 encoder->private_->best_subframe_mid_side[i] = 0;
 899         }
 900         encoder->private_->abs_residual_unaligned = encoder->private_->abs_residual = 0;
 901         encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0;
 902         encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0;
 903 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 904         encoder->private_->loose_mid_side_stereo_frames = (unsigned)((FLAC__double)encoder->protected_->sample_rate * 0.4 / (FLAC__double)encoder->protected_->blocksize + 0.5);
 905 #else
 906         /* 26214 is the approximate fixed-point equivalent to 0.4 (0.4 * 2^16) */
 907         /* sample rate can be up to 655350 Hz, and thus use 20 bits, so we do the multiply&divide by hand */
 908         FLAC__ASSERT(FLAC__MAX_SAMPLE_RATE <= 655350);
 909         FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535);
 910         FLAC__ASSERT(encoder->protected_->sample_rate <= 655350);
 911         FLAC__ASSERT(encoder->protected_->blocksize <= 65535);
 912         encoder->private_->loose_mid_side_stereo_frames = (unsigned)FLAC__fixedpoint_trunc((((FLAC__uint64)(encoder->protected_->sample_rate) * (FLAC__uint64)(26214)) << 16) / (encoder->protected_->blocksize<<16) + FLAC__FP_ONE_HALF);
 913 #endif
 914         if(encoder->private_->loose_mid_side_stereo_frames == 0)
 915                 encoder->private_->loose_mid_side_stereo_frames = 1;
 916         encoder->private_->loose_mid_side_stereo_frame_count = 0;
 917         encoder->private_->current_sample_number = 0;
 918         encoder->private_->current_frame_number = 0;
 919
 920         encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30);
 921         encoder->private_->use_wide_by_order = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(max(encoder->protected_->max_lpc_order, FLAC__MAX_FIXED_ORDER))+1 > 30); /*@@@ need to use this? */
 922         encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */
 923
 924         /*
 925          * get the CPU info and set the function pointers
 926          */
 927         FLAC__cpu_info(&encoder->private_->cpuinfo);
 928         /* first default to the non-asm routines */
 929 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 930         encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation;
 931 #endif
 932         encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor;
 933 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 934         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients;
 935         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide;
 936         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients;
 937 #endif
 938         /* now override with asm where appropriate */
 939 #ifndef FLAC__INTEGER_ONLY_LIBRARY
 940 # ifndef FLAC__NO_ASM
 941         if(encoder->private_->cpuinfo.use_asm) {
 942 #  ifdef FLAC__CPU_IA32
 943                 FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
 944 #   ifdef FLAC__HAS_NASM
 945 #    ifdef FLAC__SSE_OS
 946                 if(encoder->private_->cpuinfo.data.ia32.sse) {
 947                         if(encoder->protected_->max_lpc_order < 4)
 948                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
 949                         else if(encoder->protected_->max_lpc_order < 8)
 950                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8;
 951                         else if(encoder->protected_->max_lpc_order < 12)
 952                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12;
 953                         else
 954                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
 955                 }
 956                 else
 957 #    endif /* FLAC__SSE_OS */
 958                 if(encoder->private_->cpuinfo.data.ia32._3dnow)
 959                         encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
 960                 else
 961                         encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
 962                 if(encoder->private_->cpuinfo.data.ia32.mmx) {
 963                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
 964                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx;
 965                 }
 966                 else {
 967                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
 968                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
 969                 }
 970                 if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov)
 971                         encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov;
 972 #   endif /* FLAC__HAS_NASM */
 973 #  endif /* FLAC__CPU_IA32 */
 974         }
 975 # endif /* !FLAC__NO_ASM */
 976 #endif /* !FLAC__INTEGER_ONLY_LIBRARY */
 977         /* finally override based on wide-ness if necessary */
 978         if(encoder->private_->use_wide_by_block) {
 979                 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide;
 980         }
 981
 982         /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
 983         encoder->private_->precompute_partition_sums = (encoder->protected_->max_residual_partition_order > encoder->protected_->min_residual_partition_order) || encoder->protected_->do_escape_coding;
 984
 985         /* set state to OK; from here on, errors are fatal and we'll override the state then */
 986         encoder->protected_->state = FLAC__STREAM_ENCODER_OK;
 987
 988 #if FLAC__HAS_OGG
 989         encoder->private_->is_ogg = is_ogg;
 990         if(is_ogg && !FLAC__ogg_encoder_aspect_init(&encoder->protected_->ogg_encoder_aspect)) {
 991                 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
 992                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
 993         }
 994 #endif
 995
 996         encoder->private_->read_callback = read_callback;
 997         encoder->private_->write_callback = write_callback;
 998         encoder->private_->seek_callback = seek_callback;
 999         encoder->private_->tell_callback = tell_callback;
1000         encoder->private_->metadata_callback = metadata_callback;
1001         encoder->private_->client_data = client_data;
1002
1003         if(!resize_buffers_(encoder, encoder->protected_->blocksize)) {
1004                 /* the above function sets the state for us in case of an error */
1005                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1006         }
1007
1008         if(!FLAC__bitbuffer_init(encoder->private_->frame)) {
1009                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1010                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1011         }
1012
1013         /*
1014          * Set up the verify stuff if necessary
1015          */
1016         if(encoder->protected_->verify) {
1017                 /*
1018                  * First, set up the fifo which will hold the
1019                  * original signal to compare against
1020                  */
1021                 encoder->private_->verify.input_fifo.size = encoder->protected_->blocksize;
1022                 for(i = 0; i < encoder->protected_->channels; i++) {
1023                         if(0 == (encoder->private_->verify.input_fifo.data[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder->private_->verify.input_fifo.size))) {
1024                                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1025                                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1026                         }
1027                 }
1028                 encoder->private_->verify.input_fifo.tail = 0;
1029
1030                 /*
1031                  * Now set up a stream decoder for verification
1032                  */
1033                 encoder->private_->verify.decoder = FLAC__stream_decoder_new();
1034                 if(0 == encoder->private_->verify.decoder) {
1035                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
1036                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1037                 }
1038
1039                 if(FLAC__stream_decoder_init_stream(encoder->private_->verify.decoder, verify_read_callback_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, verify_write_callback_, verify_metadata_callback_, verify_error_callback_, /*client_data=*/encoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
1040                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
1041                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1042                 }
1043         }
1044         encoder->private_->verify.error_stats.absolute_sample = 0;
1045         encoder->private_->verify.error_stats.frame_number = 0;
1046         encoder->private_->verify.error_stats.channel = 0;
1047         encoder->private_->verify.error_stats.sample = 0;
1048         encoder->private_->verify.error_stats.expected = 0;
1049         encoder->private_->verify.error_stats.got = 0;
1050
1051         /*
1052          * These must be done before we write any metadata, because that
1053          * calls the write_callback, which uses these values.
1054          */
1055         encoder->private_->first_seekpoint_to_check = 0;
1056         encoder->private_->samples_written = 0;
1057         encoder->protected_->streaminfo_offset = 0;
1058         encoder->protected_->seektable_offset = 0;
1059         encoder->protected_->audio_offset = 0;
1060
1061         /*
1062          * write the stream header
1063          */
1064         if(encoder->protected_->verify)
1065                 encoder->private_->verify.state_hint = ENCODER_IN_MAGIC;
1066         if(!FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN)) {
1067                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1068                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1069         }
1070         if(!write_bitbuffer_(encoder, 0)) {
1071                 /* the above function sets the state for us in case of an error */
1072                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1073         }
1074
1075         /*
1076          * write the STREAMINFO metadata block
1077          */
1078         if(encoder->protected_->verify)
1079                 encoder->private_->verify.state_hint = ENCODER_IN_METADATA;
1080         encoder->private_->streaminfo.type = FLAC__METADATA_TYPE_STREAMINFO;
1081         encoder->private_->streaminfo.is_last = false; /* we will have at a minimum a VORBIS_COMMENT afterwards */
1082         encoder->private_->streaminfo.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
1083         encoder->private_->streaminfo.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */
1084         encoder->private_->streaminfo.data.stream_info.max_blocksize = encoder->protected_->blocksize;
1085         encoder->private_->streaminfo.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */
1086         encoder->private_->streaminfo.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */
1087         encoder->private_->streaminfo.data.stream_info.sample_rate = encoder->protected_->sample_rate;
1088         encoder->private_->streaminfo.data.stream_info.channels = encoder->protected_->channels;
1089         encoder->private_->streaminfo.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample;
1090         encoder->private_->streaminfo.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
1091         memset(encoder->private_->streaminfo.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
1092         FLAC__MD5Init(&encoder->private_->md5context);
1093         if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1094                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1095                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1096         }
1097         if(!FLAC__add_metadata_block(&encoder->private_->streaminfo, encoder->private_->frame)) {
1098                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1099                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1100         }
1101         if(!write_bitbuffer_(encoder, 0)) {
1102                 /* the above function sets the state for us in case of an error */
1103                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1104         }
1105
1106         /*
1107          * Now that the STREAMINFO block is written, we can init this to an
1108          * absurdly-high value...
1109          */
1110         encoder->private_->streaminfo.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
1111         /* ... and clear this to 0 */
1112         encoder->private_->streaminfo.data.stream_info.total_samples = 0;
1113
1114         /*
1115          * Check to see if the supplied metadata contains a VORBIS_COMMENT;
1116          * if not, we will write an empty one (FLAC__add_metadata_block()
1117          * automatically supplies the vendor string).
1118          *
1119          * WATCHOUT: the Ogg FLAC mapping requires us to write this block after
1120          * the STREAMINFO.  (In the case that metadata_has_vorbis_comment is
1121          * true it will have already insured that the metadata list is properly
1122          * ordered.)
1123          */
1124         if(!metadata_has_vorbis_comment) {
1125                 FLAC__StreamMetadata vorbis_comment;
1126                 vorbis_comment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
1127                 vorbis_comment.is_last = (encoder->protected_->num_metadata_blocks == 0);
1128                 vorbis_comment.length = 4 + 4; /* MAGIC NUMBER */
1129                 vorbis_comment.data.vorbis_comment.vendor_string.length = 0;
1130                 vorbis_comment.data.vorbis_comment.vendor_string.entry = 0;
1131                 vorbis_comment.data.vorbis_comment.num_comments = 0;
1132                 vorbis_comment.data.vorbis_comment.comments = 0;
1133                 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1134                         encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1135                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1136                 }
1137                 if(!FLAC__add_metadata_block(&vorbis_comment, encoder->private_->frame)) {
1138                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1139                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1140                 }
1141                 if(!write_bitbuffer_(encoder, 0)) {
1142                         /* the above function sets the state for us in case of an error */
1143                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1144                 }
1145         }
1146
1147         /*
1148          * write the user's metadata blocks
1149          */
1150         for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
1151                 encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1);
1152                 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1153                         encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1154                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1155                 }
1156                 if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame)) {
1157                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1158                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1159                 }
1160                 if(!write_bitbuffer_(encoder, 0)) {
1161                         /* the above function sets the state for us in case of an error */
1162                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1163                 }
1164         }
1165
1166         /* now that all the metadata is written, we save the stream offset */
1167         if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &encoder->protected_->audio_offset, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) { /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */
1168                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
1169                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1170         }
1171
1172         if(encoder->protected_->verify)
1173                 encoder->private_->verify.state_hint = ENCODER_IN_AUDIO;
1174
1175         return FLAC__STREAM_ENCODER_INIT_STATUS_OK;
1176 }
1177
1178 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream(
1179         FLAC__StreamEncoder *encoder,
1180         FLAC__StreamEncoderWriteCallback write_callback,
1181         FLAC__StreamEncoderSeekCallback seek_callback,
1182         FLAC__StreamEncoderTellCallback tell_callback,
1183         FLAC__StreamEncoderMetadataCallback metadata_callback,
1184         void *client_data
1185 )
1186 {
1187         return init_stream_internal_(
1188                 encoder,
1189                 /*read_callback=*/0,
1190                 write_callback,
1191                 seek_callback,
1192                 tell_callback,
1193                 metadata_callback,
1194                 client_data,
1195                 /*is_ogg=*/false
1196         );
1197 }
1198
1199 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_stream(
1200         FLAC__StreamEncoder *encoder,
1201         FLAC__StreamEncoderReadCallback read_callback,
1202         FLAC__StreamEncoderWriteCallback write_callback,
1203         FLAC__StreamEncoderSeekCallback seek_callback,
1204         FLAC__StreamEncoderTellCallback tell_callback,
1205         FLAC__StreamEncoderMetadataCallback metadata_callback,
1206         void *client_data
1207 )
1208 {
1209         return init_stream_internal_(
1210                 encoder,
1211                 read_callback,
1212                 write_callback,
1213                 seek_callback,
1214                 tell_callback,
1215                 metadata_callback,
1216                 client_data,
1217                 /*is_ogg=*/true
1218         );
1219 }
1220
1221 static FLAC__StreamEncoderInitStatus init_FILE_internal_(
1222         FLAC__StreamEncoder *encoder,
1223         FILE *file,
1224         FLAC__StreamEncoderProgressCallback progress_callback,
1225         void *client_data,
1226         FLAC__bool is_ogg
1227 )
1228 {
1229         FLAC__StreamEncoderInitStatus init_status;
1230
1231         FLAC__ASSERT(0 != encoder);
1232         FLAC__ASSERT(0 != file);
1233
1234         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1235                 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
1236
1237         /* double protection */
1238         if(file == 0) {
1239                 encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR;
1240                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1241         }
1242
1243         /*
1244          * To make sure that our file does not go unclosed after an error, we
1245          * must assign the FILE pointer before any further error can occur in
1246          * this routine.
1247          */
1248         if(file == stdout)
1249                 file = get_binary_stdout_(); /* just to be safe */
1250
1251         encoder->private_->file = file;
1252
1253         encoder->private_->progress_callback = progress_callback;
1254         encoder->private_->bytes_written = 0;
1255         encoder->private_->samples_written = 0;
1256         encoder->private_->frames_written = 0;
1257
1258         init_status = init_stream_internal_(
1259                 encoder,
1260                 is_ogg? file_read_callback_ : 0,
1261                 file_write_callback_,
1262                 file_seek_callback_,
1263                 file_tell_callback_,
1264                 /*metadata_callback=*/0,
1265                 client_data,
1266                 is_ogg
1267         );
1268         if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
1269                 /* the above function sets the state for us in case of an error */
1270                 return init_status;
1271         }
1272
1273         {
1274                 unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
1275
1276                 FLAC__ASSERT(blocksize != 0);
1277                 encoder->private_->total_frames_estimate = (unsigned)((FLAC__stream_encoder_get_total_samples_estimate(encoder) + blocksize - 1) / blocksize);
1278         }
1279
1280         return init_status;
1281 }
1282
1283 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_FILE(
1284         FLAC__StreamEncoder *encoder,
1285         FILE *file,
1286         FLAC__StreamEncoderProgressCallback progress_callback,
1287         void *client_data
1288 )
1289 {
1290         return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/false);
1291 }
1292
1293 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_FILE(
1294         FLAC__StreamEncoder *encoder,
1295         FILE *file,
1296         FLAC__StreamEncoderProgressCallback progress_callback,
1297         void *client_data
1298 )
1299 {
1300         return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/true);
1301 }
1302
1303 static FLAC__StreamEncoderInitStatus init_file_internal_(
1304         FLAC__StreamEncoder *encoder,
1305         const char *filename,
1306         FLAC__StreamEncoderProgressCallback progress_callback,
1307         void *client_data,
1308         FLAC__bool is_ogg
1309 )
1310 {
1311         FILE *file;
1312
1313         FLAC__ASSERT(0 != encoder);
1314
1315         /*
1316          * To make sure that our file does not go unclosed after an error, we
1317          * have to do the same entrance checks here that are later performed
1318          * in FLAC__stream_encoder_init_FILE() before the FILE* is assigned.
1319          */
1320         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1321                 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
1322
1323         file = filename? fopen(filename, "w+b") : stdout;
1324
1325         if(file == 0) {
1326                 encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR;
1327                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1328         }
1329
1330         return init_FILE_internal_(encoder, file, progress_callback, client_data, is_ogg);
1331 }
1332
1333 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_file(
1334         FLAC__StreamEncoder *encoder,
1335         const char *filename,
1336         FLAC__StreamEncoderProgressCallback progress_callback,
1337         void *client_data
1338 )
1339 {
1340         return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/false);
1341 }
1342
1343 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_file(
1344         FLAC__StreamEncoder *encoder,
1345         const char *filename,
1346         FLAC__StreamEncoderProgressCallback progress_callback,
1347         void *client_data
1348 )
1349 {
1350         return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/true);
1351 }
1352
1353 FLAC_API FLAC__bool FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
1354 {
1355         FLAC__bool verify_mismatch = false;
1356
1357         FLAC__ASSERT(0 != encoder);
1358         FLAC__ASSERT(0 != encoder->private_);
1359         FLAC__ASSERT(0 != encoder->protected_);
1360
1361         if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
1362                 return true;
1363
1364         if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
1365                 if(encoder->private_->current_sample_number != 0) {
1366                         encoder->protected_->blocksize = encoder->private_->current_sample_number;
1367                         if(!process_frame_(encoder, /*is_fractional_block=*/true) && encoder->protected_->state == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
1368                                 verify_mismatch = true;
1369                 }
1370         }
1371
1372         FLAC__MD5Final(encoder->private_->streaminfo.data.stream_info.md5sum, &encoder->private_->md5context);
1373
1374         if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
1375                 if(encoder->private_->seek_callback) {
1376 #if FLAC__HAS_OGG
1377                         if(encoder->private_->is_ogg)
1378                                 update_ogg_metadata_(encoder);
1379                         else
1380 #endif
1381                         update_metadata_(encoder);
1382                 }
1383                 if(encoder->private_->metadata_callback)
1384                         encoder->private_->metadata_callback(encoder, &encoder->private_->streaminfo, encoder->private_->client_data);
1385         }
1386
1387         if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder && !FLAC__stream_decoder_finish(encoder->private_->verify.decoder))
1388                 verify_mismatch = true;
1389
1390         if(0 != encoder->private_->file) {
1391                 if(encoder->private_->file != stdout)
1392                         fclose(encoder->private_->file);
1393                 encoder->private_->file = 0;
1394         }
1395
1396 #if FLAC__HAS_OGG
1397         if(encoder->private_->is_ogg)
1398                 FLAC__ogg_encoder_aspect_finish(&encoder->protected_->ogg_encoder_aspect);
1399 #endif
1400
1401         free_(encoder);
1402         set_defaults_(encoder);
1403
1404         /* change the state to uninitialized unless there was a verify mismatch */
1405         if(verify_mismatch)
1406                 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA;
1407         else
1408                 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
1409
1410         return !verify_mismatch;
1411 }
1412
1413 FLAC_API FLAC__bool FLAC__stream_encoder_set_ogg_serial_number(FLAC__StreamEncoder *encoder, long value)
1414 {
1415         FLAC__ASSERT(0 != encoder);
1416         FLAC__ASSERT(0 != encoder->private_);
1417         FLAC__ASSERT(0 != encoder->protected_);
1418         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1419                 return false;
1420 #ifdef FLAC__HAS_OGG
1421         /* can't check encoder->private_->is_ogg since that's not set until init time */
1422         FLAC__ogg_encoder_aspect_set_serial_number(&encoder->protected_->ogg_encoder_aspect, value);
1423         return true;
1424 #else
1425         (void)value;
1426         return false;
1427 #endif
1428 }
1429
1430 FLAC_API FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value)
1431 {
1432         FLAC__ASSERT(0 != encoder);
1433         FLAC__ASSERT(0 != encoder->private_);
1434         FLAC__ASSERT(0 != encoder->protected_);
1435         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1436                 return false;
1437 #ifndef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
1438         encoder->protected_->verify = value;
1439 #endif
1440         return true;
1441 }
1442
1443 FLAC_API FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value)
1444 {
1445         FLAC__ASSERT(0 != encoder);
1446         FLAC__ASSERT(0 != encoder->private_);
1447         FLAC__ASSERT(0 != encoder->protected_);
1448         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1449                 return false;
1450         encoder->protected_->streamable_subset = value;
1451         return true;
1452 }
1453
1454 FLAC_API FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value)
1455 {
1456         FLAC__ASSERT(0 != encoder);
1457         FLAC__ASSERT(0 != encoder->private_);
1458         FLAC__ASSERT(0 != encoder->protected_);
1459         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1460                 return false;
1461         encoder->protected_->channels = value;
1462         return true;
1463 }
1464
1465 FLAC_API FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value)
1466 {
1467         FLAC__ASSERT(0 != encoder);
1468         FLAC__ASSERT(0 != encoder->private_);
1469         FLAC__ASSERT(0 != encoder->protected_);
1470         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1471                 return false;
1472         encoder->protected_->bits_per_sample = value;
1473         return true;
1474 }
1475
1476 FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value)
1477 {
1478         FLAC__ASSERT(0 != encoder);
1479         FLAC__ASSERT(0 != encoder->private_);
1480         FLAC__ASSERT(0 != encoder->protected_);
1481         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1482                 return false;
1483         encoder->protected_->sample_rate = value;
1484         return true;
1485 }
1486
1487 FLAC_API FLAC__bool FLAC__stream_encoder_set_compression_level(FLAC__StreamEncoder *encoder, unsigned value)
1488 {
1489         FLAC__bool ok = true;
1490         FLAC__ASSERT(0 != encoder);
1491         FLAC__ASSERT(0 != encoder->private_);
1492         FLAC__ASSERT(0 != encoder->protected_);
1493         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1494                 return false;
1495         if(value >= sizeof(compression_levels_)/sizeof(compression_levels_[0]))
1496                 value = sizeof(compression_levels_)/sizeof(compression_levels_[0]) - 1;
1497         ok &= FLAC__stream_encoder_set_do_mid_side_stereo          (encoder, compression_levels_[value].do_mid_side_stereo);
1498         ok &= FLAC__stream_encoder_set_loose_mid_side_stereo       (encoder, compression_levels_[value].loose_mid_side_stereo);
1499         ok &= FLAC__stream_encoder_set_apodization                 (encoder, compression_levels_[value].apodization);
1500         ok &= FLAC__stream_encoder_set_max_lpc_order               (encoder, compression_levels_[value].max_lpc_order);
1501         ok &= FLAC__stream_encoder_set_qlp_coeff_precision         (encoder, compression_levels_[value].qlp_coeff_precision);
1502         ok &= FLAC__stream_encoder_set_do_qlp_coeff_prec_search    (encoder, compression_levels_[value].do_qlp_coeff_prec_search);
1503         ok &= FLAC__stream_encoder_set_do_escape_coding            (encoder, compression_levels_[value].do_escape_coding);
1504         ok &= FLAC__stream_encoder_set_do_exhaustive_model_search  (encoder, compression_levels_[value].do_exhaustive_model_search);
1505         ok &= FLAC__stream_encoder_set_min_residual_partition_order(encoder, compression_levels_[value].min_residual_partition_order);
1506         ok &= FLAC__stream_encoder_set_max_residual_partition_order(encoder, compression_levels_[value].max_residual_partition_order);
1507         ok &= FLAC__stream_encoder_set_rice_parameter_search_dist  (encoder, compression_levels_[value].rice_parameter_search_dist);
1508         return ok;
1509 }
1510
1511 FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value)
1512 {
1513         FLAC__ASSERT(0 != encoder);
1514         FLAC__ASSERT(0 != encoder->private_);
1515         FLAC__ASSERT(0 != encoder->protected_);
1516         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1517                 return false;
1518         encoder->protected_->blocksize = value;
1519         return true;
1520 }
1521
1522 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
1523 {
1524         FLAC__ASSERT(0 != encoder);
1525         FLAC__ASSERT(0 != encoder->private_);
1526         FLAC__ASSERT(0 != encoder->protected_);
1527         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1528                 return false;
1529         encoder->protected_->do_mid_side_stereo = value;
1530         return true;
1531 }
1532
1533 FLAC_API FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
1534 {
1535         FLAC__ASSERT(0 != encoder);
1536         FLAC__ASSERT(0 != encoder->private_);
1537         FLAC__ASSERT(0 != encoder->protected_);
1538         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1539                 return false;
1540         encoder->protected_->loose_mid_side_stereo = value;
1541         return true;
1542 }
1543
1544 FLAC_API FLAC__bool FLAC__stream_encoder_set_apodization(FLAC__StreamEncoder *encoder, const char *specification)
1545 {
1546         FLAC__ASSERT(0 != encoder);
1547         FLAC__ASSERT(0 != encoder->private_);
1548         FLAC__ASSERT(0 != encoder->protected_);
1549         FLAC__ASSERT(0 != specification);
1550         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1551                 return false;
1552 #ifdef FLAC__INTEGER_ONLY_LIBRARY
1553         (void)specification; /* silently ignore since we haven't integerized; will always use a rectangular window */
1554 #else
1555         encoder->protected_->num_apodizations = 0;
1556         while(1) {
1557                 const char *s = strchr(specification, ';');
1558                 const size_t n = s? (size_t)(s - specification) : strlen(specification);
1559                 if     (n==8  && 0 == strncmp("bartlett"     , specification, n))
1560                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT;
1561                 else if(n==13 && 0 == strncmp("bartlett_hann", specification, n))
1562                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT_HANN;
1563                 else if(n==8  && 0 == strncmp("blackman"     , specification, n))
1564                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN;
1565                 else if(n==26 && 0 == strncmp("blackman_harris_4term_92db", specification, n))
1566                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE;
1567                 else if(n==6  && 0 == strncmp("connes"       , specification, n))
1568                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_CONNES;
1569                 else if(n==7  && 0 == strncmp("flattop"      , specification, n))
1570                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_FLATTOP;
1571                 else if(n>7   && 0 == strncmp("gauss("       , specification, 6)) {
1572                         FLAC__real stddev = (FLAC__real)strtod(specification+6, 0);
1573                         if (stddev > 0.0 && stddev <= 0.5) {
1574                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.gauss.stddev = stddev;
1575                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_GAUSS;
1576                         }
1577                 }
1578                 else if(n==7  && 0 == strncmp("hamming"      , specification, n))
1579                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HAMMING;
1580                 else if(n==4  && 0 == strncmp("hann"         , specification, n))
1581                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HANN;
1582                 else if(n==13 && 0 == strncmp("kaiser_bessel", specification, n))
1583                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_KAISER_BESSEL;
1584                 else if(n==7  && 0 == strncmp("nuttall"      , specification, n))
1585                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_NUTTALL;
1586                 else if(n==9  && 0 == strncmp("rectangle"    , specification, n))
1587                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_RECTANGLE;
1588                 else if(n==8  && 0 == strncmp("triangle"     , specification, n))
1589                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TRIANGLE;
1590                 else if(n>7   && 0 == strncmp("tukey("       , specification, 6)) {
1591                         FLAC__real p = (FLAC__real)strtod(specification+6, 0);
1592                         if (p >= 0.0 && p <= 1.0) {
1593                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.tukey.p = p;
1594                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TUKEY;
1595                         }
1596                 }
1597                 else if(n==5  && 0 == strncmp("welch"        , specification, n))
1598                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_WELCH;
1599                 if (encoder->protected_->num_apodizations == 32)
1600                         break;
1601                 if (s)
1602                         specification = s+1;
1603                 else
1604                         break;
1605         }
1606         if(encoder->protected_->num_apodizations == 0) {
1607                 encoder->protected_->num_apodizations = 1;
1608                 encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
1609                 encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
1610         }
1611 #endif
1612         return true;
1613 }
1614
1615 FLAC_API FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value)
1616 {
1617         FLAC__ASSERT(0 != encoder);
1618         FLAC__ASSERT(0 != encoder->private_);
1619         FLAC__ASSERT(0 != encoder->protected_);
1620         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1621                 return false;
1622         encoder->protected_->max_lpc_order = value;
1623         return true;
1624 }
1625
1626 FLAC_API FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value)
1627 {
1628         FLAC__ASSERT(0 != encoder);
1629         FLAC__ASSERT(0 != encoder->private_);
1630         FLAC__ASSERT(0 != encoder->protected_);
1631         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1632                 return false;
1633         encoder->protected_->qlp_coeff_precision = value;
1634         return true;
1635 }
1636
1637 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
1638 {
1639         FLAC__ASSERT(0 != encoder);
1640         FLAC__ASSERT(0 != encoder->private_);
1641         FLAC__ASSERT(0 != encoder->protected_);
1642         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1643                 return false;
1644         encoder->protected_->do_qlp_coeff_prec_search = value;
1645         return true;
1646 }
1647
1648 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value)
1649 {
1650         FLAC__ASSERT(0 != encoder);
1651         FLAC__ASSERT(0 != encoder->private_);
1652         FLAC__ASSERT(0 != encoder->protected_);
1653         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1654                 return false;
1655 #if 0
1656         /*@@@ deprecated: */
1657         encoder->protected_->do_escape_coding = value;
1658 #else
1659         (void)value;
1660 #endif
1661         return true;
1662 }
1663
1664 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
1665 {
1666         FLAC__ASSERT(0 != encoder);
1667         FLAC__ASSERT(0 != encoder->private_);
1668         FLAC__ASSERT(0 != encoder->protected_);
1669         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1670                 return false;
1671         encoder->protected_->do_exhaustive_model_search = value;
1672         return true;
1673 }
1674
1675 FLAC_API FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
1676 {
1677         FLAC__ASSERT(0 != encoder);
1678         FLAC__ASSERT(0 != encoder->private_);
1679         FLAC__ASSERT(0 != encoder->protected_);
1680         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1681                 return false;
1682         encoder->protected_->min_residual_partition_order = value;
1683         return true;
1684 }
1685
1686 FLAC_API FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
1687 {
1688         FLAC__ASSERT(0 != encoder);
1689         FLAC__ASSERT(0 != encoder->private_);
1690         FLAC__ASSERT(0 != encoder->protected_);
1691         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1692                 return false;
1693         encoder->protected_->max_residual_partition_order = value;
1694         return true;
1695 }
1696
1697 FLAC_API FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value)
1698 {
1699         FLAC__ASSERT(0 != encoder);
1700         FLAC__ASSERT(0 != encoder->private_);
1701         FLAC__ASSERT(0 != encoder->protected_);
1702         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1703                 return false;
1704 #if 0
1705         /*@@@ deprecated: */
1706         encoder->protected_->rice_parameter_search_dist = value;
1707 #else
1708         (void)value;
1709 #endif
1710         return true;
1711 }
1712
1713 FLAC_API FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value)
1714 {
1715         FLAC__ASSERT(0 != encoder);
1716         FLAC__ASSERT(0 != encoder->private_);
1717         FLAC__ASSERT(0 != encoder->protected_);
1718         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1719                 return false;
1720         encoder->protected_->total_samples_estimate = value;
1721         return true;
1722 }
1723
1724 FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks)
1725 {
1726         FLAC__ASSERT(0 != encoder);
1727         FLAC__ASSERT(0 != encoder->private_);
1728         FLAC__ASSERT(0 != encoder->protected_);
1729         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1730                 return false;
1731         encoder->protected_->metadata = metadata;
1732         encoder->protected_->num_metadata_blocks = num_blocks;
1733 #if FLAC__HAS_OGG
1734         if(!FLAC__ogg_encoder_aspect_set_num_metadata(&encoder->protected_->ogg_encoder_aspect, num_blocks))
1735                 return false;
1736 #endif
1737         return true;
1738 }
1739
1740 /*
1741  * These three functions are not static, but not publically exposed in
1742  * include/FLAC/ either.  They are used by the test suite.
1743  */
1744 FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1745 {
1746         FLAC__ASSERT(0 != encoder);
1747         FLAC__ASSERT(0 != encoder->private_);
1748         FLAC__ASSERT(0 != encoder->protected_);
1749         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1750                 return false;
1751         encoder->private_->disable_constant_subframes = value;
1752         return true;
1753 }
1754
1755 FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1756 {
1757         FLAC__ASSERT(0 != encoder);
1758         FLAC__ASSERT(0 != encoder->private_);
1759         FLAC__ASSERT(0 != encoder->protected_);
1760         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1761                 return false;
1762         encoder->private_->disable_fixed_subframes = value;
1763         return true;
1764 }
1765
1766 FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1767 {
1768         FLAC__ASSERT(0 != encoder);
1769         FLAC__ASSERT(0 != encoder->private_);
1770         FLAC__ASSERT(0 != encoder->protected_);
1771         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1772                 return false;
1773         encoder->private_->disable_verbatim_subframes = value;
1774         return true;
1775 }
1776
1777 FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
1778 {
1779         FLAC__ASSERT(0 != encoder);
1780         FLAC__ASSERT(0 != encoder->private_);
1781         FLAC__ASSERT(0 != encoder->protected_);
1782         return encoder->protected_->state;
1783 }
1784
1785 FLAC_API FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder)
1786 {
1787         FLAC__ASSERT(0 != encoder);
1788         FLAC__ASSERT(0 != encoder->private_);
1789         FLAC__ASSERT(0 != encoder->protected_);
1790         if(encoder->protected_->verify)
1791                 return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder);
1792         else
1793                 return FLAC__STREAM_DECODER_UNINITIALIZED;
1794 }
1795
1796 FLAC_API const char *FLAC__stream_encoder_get_resolved_state_string(const FLAC__StreamEncoder *encoder)
1797 {
1798         FLAC__ASSERT(0 != encoder);
1799         FLAC__ASSERT(0 != encoder->private_);
1800         FLAC__ASSERT(0 != encoder->protected_);
1801         if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR)
1802                 return FLAC__StreamEncoderStateString[encoder->protected_->state];
1803         else
1804                 return FLAC__stream_decoder_get_resolved_state_string(encoder->private_->verify.decoder);
1805 }
1806
1807 FLAC_API void FLAC__stream_encoder_get_verify_decoder_error_stats(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got)
1808 {
1809         FLAC__ASSERT(0 != encoder);
1810         FLAC__ASSERT(0 != encoder->private_);
1811         FLAC__ASSERT(0 != encoder->protected_);
1812         if(0 != absolute_sample)
1813                 *absolute_sample = encoder->private_->verify.error_stats.absolute_sample;
1814         if(0 != frame_number)
1815                 *frame_number = encoder->private_->verify.error_stats.frame_number;
1816         if(0 != channel)
1817                 *channel = encoder->private_->verify.error_stats.channel;
1818         if(0 != sample)
1819                 *sample = encoder->private_->verify.error_stats.sample;
1820         if(0 != expected)
1821                 *expected = encoder->private_->verify.error_stats.expected;
1822         if(0 != got)
1823                 *got = encoder->private_->verify.error_stats.got;
1824 }
1825
1826 FLAC_API FLAC__bool FLAC__stream_encoder_get_verify(const FLAC__StreamEncoder *encoder)
1827 {
1828         FLAC__ASSERT(0 != encoder);
1829         FLAC__ASSERT(0 != encoder->private_);
1830         FLAC__ASSERT(0 != encoder->protected_);
1831         return encoder->protected_->verify;
1832 }
1833
1834 FLAC_API FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder)
1835 {
1836         FLAC__ASSERT(0 != encoder);
1837         FLAC__ASSERT(0 != encoder->private_);
1838         FLAC__ASSERT(0 != encoder->protected_);
1839         return encoder->protected_->streamable_subset;
1840 }
1841
1842 FLAC_API unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder)
1843 {
1844         FLAC__ASSERT(0 != encoder);
1845         FLAC__ASSERT(0 != encoder->private_);
1846         FLAC__ASSERT(0 != encoder->protected_);
1847         return encoder->protected_->channels;
1848 }
1849
1850 FLAC_API unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder)
1851 {
1852         FLAC__ASSERT(0 != encoder);
1853         FLAC__ASSERT(0 != encoder->private_);
1854         FLAC__ASSERT(0 != encoder->protected_);
1855         return encoder->protected_->bits_per_sample;
1856 }
1857
1858 FLAC_API unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder)
1859 {
1860         FLAC__ASSERT(0 != encoder);
1861         FLAC__ASSERT(0 != encoder->private_);
1862         FLAC__ASSERT(0 != encoder->protected_);
1863         return encoder->protected_->sample_rate;
1864 }
1865
1866 FLAC_API unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder)
1867 {
1868         FLAC__ASSERT(0 != encoder);
1869         FLAC__ASSERT(0 != encoder->private_);
1870         FLAC__ASSERT(0 != encoder->protected_);
1871         return encoder->protected_->blocksize;
1872 }
1873
1874 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder)
1875 {
1876         FLAC__ASSERT(0 != encoder);
1877         FLAC__ASSERT(0 != encoder->private_);
1878         FLAC__ASSERT(0 != encoder->protected_);
1879         return encoder->protected_->do_mid_side_stereo;
1880 }
1881
1882 FLAC_API FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder)
1883 {
1884         FLAC__ASSERT(0 != encoder);
1885         FLAC__ASSERT(0 != encoder->private_);
1886         FLAC__ASSERT(0 != encoder->protected_);
1887         return encoder->protected_->loose_mid_side_stereo;
1888 }
1889
1890 FLAC_API unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder)
1891 {
1892         FLAC__ASSERT(0 != encoder);
1893         FLAC__ASSERT(0 != encoder->private_);
1894         FLAC__ASSERT(0 != encoder->protected_);
1895         return encoder->protected_->max_lpc_order;
1896 }
1897
1898 FLAC_API unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder)
1899 {
1900         FLAC__ASSERT(0 != encoder);
1901         FLAC__ASSERT(0 != encoder->private_);
1902         FLAC__ASSERT(0 != encoder->protected_);
1903         return encoder->protected_->qlp_coeff_precision;
1904 }
1905
1906 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder)
1907 {
1908         FLAC__ASSERT(0 != encoder);
1909         FLAC__ASSERT(0 != encoder->private_);
1910         FLAC__ASSERT(0 != encoder->protected_);
1911         return encoder->protected_->do_qlp_coeff_prec_search;
1912 }
1913
1914 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder)
1915 {
1916         FLAC__ASSERT(0 != encoder);
1917         FLAC__ASSERT(0 != encoder->private_);
1918         FLAC__ASSERT(0 != encoder->protected_);
1919         return encoder->protected_->do_escape_coding;
1920 }
1921
1922 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder)
1923 {
1924         FLAC__ASSERT(0 != encoder);
1925         FLAC__ASSERT(0 != encoder->private_);
1926         FLAC__ASSERT(0 != encoder->protected_);
1927         return encoder->protected_->do_exhaustive_model_search;
1928 }
1929
1930 FLAC_API unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder)
1931 {
1932         FLAC__ASSERT(0 != encoder);
1933         FLAC__ASSERT(0 != encoder->private_);
1934         FLAC__ASSERT(0 != encoder->protected_);
1935         return encoder->protected_->min_residual_partition_order;
1936 }
1937
1938 FLAC_API unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder)
1939 {
1940         FLAC__ASSERT(0 != encoder);
1941         FLAC__ASSERT(0 != encoder->private_);
1942         FLAC__ASSERT(0 != encoder->protected_);
1943         return encoder->protected_->max_residual_partition_order;
1944 }
1945
1946 FLAC_API unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder)
1947 {
1948         FLAC__ASSERT(0 != encoder);
1949         FLAC__ASSERT(0 != encoder->private_);
1950         FLAC__ASSERT(0 != encoder->protected_);
1951         return encoder->protected_->rice_parameter_search_dist;
1952 }
1953
1954 FLAC_API FLAC__uint64 FLAC__stream_encoder_get_total_samples_estimate(const FLAC__StreamEncoder *encoder)
1955 {
1956         FLAC__ASSERT(0 != encoder);
1957         FLAC__ASSERT(0 != encoder->private_);
1958         FLAC__ASSERT(0 != encoder->protected_);
1959         return encoder->protected_->total_samples_estimate;
1960 }
1961
1962 FLAC_API FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples)
1963 {
1964         unsigned i, j, channel;
1965         FLAC__int32 x, mid, side;
1966         const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
1967
1968         FLAC__ASSERT(0 != encoder);
1969         FLAC__ASSERT(0 != encoder->private_);
1970         FLAC__ASSERT(0 != encoder->protected_);
1971         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
1972
1973         j = 0;
1974         /*
1975          * we have several flavors of the same basic loop, optimized for
1976          * different conditions:
1977          */
1978         if(encoder->protected_->max_lpc_order > 0) {
1979                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
1980                         /*
1981                          * stereo coding: unroll channel loop
1982                          * with LPC: calculate floating point version of signal
1983                          */
1984                         do {
1985                                 if(encoder->protected_->verify)
1986                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
1987
1988                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
1989                                         x = mid = side = buffer[0][j];
1990                                         encoder->private_->integer_signal[0][i] = x;
1991 #ifndef FLAC__INTEGER_ONLY_LIBRARY
1992                                         encoder->private_->real_signal[0][i] = (FLAC__real)x;
1993 #endif
1994                                         x = buffer[1][j];
1995                                         encoder->private_->integer_signal[1][i] = x;
1996 #ifndef FLAC__INTEGER_ONLY_LIBRARY
1997                                         encoder->private_->real_signal[1][i] = (FLAC__real)x;
1998 #endif
1999                                         mid += x;
2000                                         side -= x;
2001                                         mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
2002                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2003                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2004 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2005                                         encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
2006                                         encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
2007 #endif
2008                                         encoder->private_->current_sample_number++;
2009                                 }
2010                                 if(i == blocksize) {
2011                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2012                                                 return false;
2013                                 }
2014                         } while(j < samples);
2015                 }
2016                 else {
2017                         /*
2018                          * independent channel coding: buffer each channel in inner loop
2019                          * with LPC: calculate floating point version of signal
2020                          */
2021                         do {
2022                                 if(encoder->protected_->verify)
2023                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2024
2025                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2026                                         for(channel = 0; channel < channels; channel++) {
2027                                                 x = buffer[channel][j];
2028                                                 encoder->private_->integer_signal[channel][i] = x;
2029 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2030                                                 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
2031 #endif
2032                                         }
2033                                         encoder->private_->current_sample_number++;
2034                                 }
2035                                 if(i == blocksize) {
2036                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2037                                                 return false;
2038                                 }
2039                         } while(j < samples);
2040                 }
2041         }
2042         else {
2043                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
2044                         /*
2045                          * stereo coding: unroll channel loop
2046                          * without LPC: no need to calculate floating point version of signal
2047                          */
2048                         do {
2049                                 if(encoder->protected_->verify)
2050                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2051
2052                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2053                                         encoder->private_->integer_signal[0][i] = mid = side = buffer[0][j];
2054                                         x = buffer[1][j];
2055                                         encoder->private_->integer_signal[1][i] = x;
2056                                         mid += x;
2057                                         side -= x;
2058                                         mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
2059                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2060                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2061                                         encoder->private_->current_sample_number++;
2062                                 }
2063                                 if(i == blocksize) {
2064                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2065                                                 return false;
2066                                 }
2067                         } while(j < samples);
2068                 }
2069                 else {
2070                         /*
2071                          * independent channel coding: buffer each channel in inner loop
2072                          * without LPC: no need to calculate floating point version of signal
2073                          */
2074                         do {
2075                                 if(encoder->protected_->verify)
2076                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2077
2078                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2079                                         for(channel = 0; channel < channels; channel++)
2080                                                 encoder->private_->integer_signal[channel][i] = buffer[channel][j];
2081                                         encoder->private_->current_sample_number++;
2082                                 }
2083                                 if(i == blocksize) {
2084                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2085                                                 return false;
2086                                 }
2087                         } while(j < samples);
2088                 }
2089         }
2090
2091         return true;
2092 }
2093
2094 FLAC_API FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples)
2095 {
2096         unsigned i, j, k, channel;
2097         FLAC__int32 x, mid, side;
2098         const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
2099
2100         FLAC__ASSERT(0 != encoder);
2101         FLAC__ASSERT(0 != encoder->private_);
2102         FLAC__ASSERT(0 != encoder->protected_);
2103         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
2104
2105         j = k = 0;
2106         /*
2107          * we have several flavors of the same basic loop, optimized for
2108          * different conditions:
2109          */
2110         if(encoder->protected_->max_lpc_order > 0) {
2111                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
2112                         /*
2113                          * stereo coding: unroll channel loop
2114                          * with LPC: calculate floating point version of signal
2115                          */
2116                         do {
2117                                 if(encoder->protected_->verify)
2118                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2119
2120                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2121                                         x = mid = side = buffer[k++];
2122                                         encoder->private_->integer_signal[0][i] = x;
2123 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2124                                         encoder->private_->real_signal[0][i] = (FLAC__real)x;
2125 #endif
2126                                         x = buffer[k++];
2127                                         encoder->private_->integer_signal[1][i] = x;
2128 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2129                                         encoder->private_->real_signal[1][i] = (FLAC__real)x;
2130 #endif
2131                                         mid += x;
2132                                         side -= x;
2133                                         mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
2134                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2135                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2136 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2137                                         encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
2138                                         encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
2139 #endif
2140                                         encoder->private_->current_sample_number++;
2141                                 }
2142                                 if(i == blocksize) {
2143                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2144                                                 return false;
2145                                 }
2146                         } while(j < samples);
2147                 }
2148                 else {
2149                         /*
2150                          * independent channel coding: buffer each channel in inner loop
2151                          * with LPC: calculate floating point version of signal
2152                          */
2153                         do {
2154                                 if(encoder->protected_->verify)
2155                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2156
2157                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2158                                         for(channel = 0; channel < channels; channel++) {
2159                                                 x = buffer[k++];
2160                                                 encoder->private_->integer_signal[channel][i] = x;
2161 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2162                                                 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
2163 #endif
2164                                         }
2165                                         encoder->private_->current_sample_number++;
2166                                 }
2167                                 if(i == blocksize) {
2168                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2169                                                 return false;
2170                                 }
2171                         } while(j < samples);
2172                 }
2173         }
2174         else {
2175                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
2176                         /*
2177                          * stereo coding: unroll channel loop
2178                          * without LPC: no need to calculate floating point version of signal
2179                          */
2180                         do {
2181                                 if(encoder->protected_->verify)
2182                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2183
2184                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2185                                         encoder->private_->integer_signal[0][i] = mid = side = buffer[k++];
2186                                         x = buffer[k++];
2187                                         encoder->private_->integer_signal[1][i] = x;
2188                                         mid += x;
2189                                         side -= x;
2190                                         mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
2191                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2192                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2193                                         encoder->private_->current_sample_number++;
2194                                 }
2195                                 if(i == blocksize) {
2196                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2197                                                 return false;
2198                                 }
2199                         } while(j < samples);
2200                 }
2201                 else {
2202                         /*
2203                          * independent channel coding: buffer each channel in inner loop
2204                          * without LPC: no need to calculate floating point version of signal
2205                          */
2206                         do {
2207                                 if(encoder->protected_->verify)
2208                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2209
2210                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2211                                         for(channel = 0; channel < channels; channel++)
2212                                                 encoder->private_->integer_signal[channel][i] = buffer[k++];
2213                                         encoder->private_->current_sample_number++;
2214                                 }
2215                                 if(i == blocksize) {
2216                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2217                                                 return false;
2218                                 }
2219                         } while(j < samples);
2220                 }
2221         }
2222
2223         return true;
2224 }
2225
2226 /***********************************************************************
2227  *
2228  * Private class methods
2229  *
2230  ***********************************************************************/
2231
2232 void set_defaults_(FLAC__StreamEncoder *encoder)
2233 {
2234         FLAC__ASSERT(0 != encoder);
2235
2236 #ifdef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
2237         encoder->protected_->verify = true;
2238 #else
2239         encoder->protected_->verify = false;
2240 #endif
2241         encoder->protected_->streamable_subset = true;
2242         encoder->protected_->do_mid_side_stereo = false;
2243         encoder->protected_->loose_mid_side_stereo = false;
2244         encoder->protected_->channels = 2;
2245         encoder->protected_->bits_per_sample = 16;
2246         encoder->protected_->sample_rate = 44100;
2247         encoder->protected_->blocksize = 0;
2248 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2249         encoder->protected_->num_apodizations = 1;
2250         encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
2251         encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
2252 #endif
2253         encoder->protected_->max_lpc_order = 0;
2254         encoder->protected_->qlp_coeff_precision = 0;
2255         encoder->protected_->do_qlp_coeff_prec_search = false;
2256         encoder->protected_->do_exhaustive_model_search = false;
2257         encoder->protected_->do_escape_coding = false;
2258         encoder->protected_->min_residual_partition_order = 0;
2259         encoder->protected_->max_residual_partition_order = 0;
2260         encoder->protected_->rice_parameter_search_dist = 0;
2261         encoder->protected_->total_samples_estimate = 0;
2262         encoder->protected_->metadata = 0;
2263         encoder->protected_->num_metadata_blocks = 0;
2264
2265         encoder->private_->seek_table = 0;
2266         encoder->private_->disable_constant_subframes = false;
2267         encoder->private_->disable_fixed_subframes = false;
2268         encoder->private_->disable_verbatim_subframes = false;
2269 #if FLAC__HAS_OGG
2270         encoder->private_->is_ogg = false;
2271 #endif
2272         encoder->private_->read_callback = 0;
2273         encoder->private_->write_callback = 0;
2274         encoder->private_->seek_callback = 0;
2275         encoder->private_->tell_callback = 0;
2276         encoder->private_->metadata_callback = 0;
2277         encoder->private_->progress_callback = 0;
2278         encoder->private_->client_data = 0;
2279
2280 #if FLAC__HAS_OGG
2281         FLAC__ogg_encoder_aspect_set_defaults(&encoder->protected_->ogg_encoder_aspect);
2282 #endif
2283 }
2284
2285 void free_(FLAC__StreamEncoder *encoder)
2286 {
2287         unsigned i, channel;
2288
2289         FLAC__ASSERT(0 != encoder);
2290         for(i = 0; i < encoder->protected_->channels; i++) {
2291                 if(0 != encoder->private_->integer_signal_unaligned[i]) {
2292                         free(encoder->private_->integer_signal_unaligned[i]);
2293                         encoder->private_->integer_signal_unaligned[i] = 0;
2294                 }
2295 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2296                 if(0 != encoder->private_->real_signal_unaligned[i]) {
2297                         free(encoder->private_->real_signal_unaligned[i]);
2298                         encoder->private_->real_signal_unaligned[i] = 0;
2299                 }
2300 #endif
2301         }
2302         for(i = 0; i < 2; i++) {
2303                 if(0 != encoder->private_->integer_signal_mid_side_unaligned[i]) {
2304                         free(encoder->private_->integer_signal_mid_side_unaligned[i]);
2305                         encoder->private_->integer_signal_mid_side_unaligned[i] = 0;
2306                 }
2307 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2308                 if(0 != encoder->private_->real_signal_mid_side_unaligned[i]) {
2309                         free(encoder->private_->real_signal_mid_side_unaligned[i]);
2310                         encoder->private_->real_signal_mid_side_unaligned[i] = 0;
2311                 }
2312 #endif
2313         }
2314 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2315         for(i = 0; i < encoder->protected_->num_apodizations; i++) {
2316                 if(0 != encoder->private_->window_unaligned[i]) {
2317                         free(encoder->private_->window_unaligned[i]);
2318                         encoder->private_->window_unaligned[i] = 0;
2319                 }
2320         }
2321         if(0 != encoder->private_->windowed_signal_unaligned) {
2322                 free(encoder->private_->windowed_signal_unaligned);
2323                 encoder->private_->windowed_signal_unaligned = 0;
2324         }
2325 #endif
2326         for(channel = 0; channel < encoder->protected_->channels; channel++) {
2327                 for(i = 0; i < 2; i++) {
2328                         if(0 != encoder->private_->residual_workspace_unaligned[channel][i]) {
2329                                 free(encoder->private_->residual_workspace_unaligned[channel][i]);
2330                                 encoder->private_->residual_workspace_unaligned[channel][i] = 0;
2331                         }
2332                 }
2333         }
2334         for(channel = 0; channel < 2; channel++) {
2335                 for(i = 0; i < 2; i++) {
2336                         if(0 != encoder->private_->residual_workspace_mid_side_unaligned[channel][i]) {
2337                                 free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]);
2338                                 encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0;
2339                         }
2340                 }
2341         }
2342         if(0 != encoder->private_->abs_residual_unaligned) {
2343                 free(encoder->private_->abs_residual_unaligned);
2344                 encoder->private_->abs_residual_unaligned = 0;
2345         }
2346         if(0 != encoder->private_->abs_residual_partition_sums_unaligned) {
2347                 free(encoder->private_->abs_residual_partition_sums_unaligned);
2348                 encoder->private_->abs_residual_partition_sums_unaligned = 0;
2349         }
2350         if(0 != encoder->private_->raw_bits_per_partition_unaligned) {
2351                 free(encoder->private_->raw_bits_per_partition_unaligned);
2352                 encoder->private_->raw_bits_per_partition_unaligned = 0;
2353         }
2354         if(encoder->protected_->verify) {
2355                 for(i = 0; i < encoder->protected_->channels; i++) {
2356                         if(0 != encoder->private_->verify.input_fifo.data[i]) {
2357                                 free(encoder->private_->verify.input_fifo.data[i]);
2358                                 encoder->private_->verify.input_fifo.data[i] = 0;
2359                         }
2360                 }
2361         }
2362         FLAC__bitbuffer_free(encoder->private_->frame);
2363 }
2364
2365 FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize)
2366 {
2367         FLAC__bool ok;
2368         unsigned i, channel;
2369
2370         FLAC__ASSERT(new_blocksize > 0);
2371         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
2372         FLAC__ASSERT(encoder->private_->current_sample_number == 0);
2373
2374         /* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */
2375         if(new_blocksize <= encoder->private_->input_capacity)
2376                 return true;
2377
2378         ok = true;
2379
2380         /* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx()
2381          * requires that the input arrays (in our case the integer signals)
2382          * have a buffer of up to 3 zeroes in front (at negative indices) for
2383          * alignment purposes; we use 4 in front to keep the data well-aligned.
2384          */
2385
2386         for(i = 0; ok && i < encoder->protected_->channels; i++) {
2387                 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]);
2388                 memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4);
2389                 encoder->private_->integer_signal[i] += 4;
2390 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2391                 if(encoder->protected_->max_lpc_order > 0)
2392                         ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]);
2393 #endif
2394         }
2395         for(i = 0; ok && i < 2; i++) {
2396                 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]);
2397                 memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4);
2398                 encoder->private_->integer_signal_mid_side[i] += 4;
2399 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2400                 if(encoder->protected_->max_lpc_order > 0)
2401                         ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]);
2402 #endif
2403         }
2404 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2405         if(ok && encoder->protected_->max_lpc_order > 0) {
2406                 for(i = 0; ok && i < encoder->protected_->num_apodizations; i++)
2407                         ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->window_unaligned[i], &encoder->private_->window[i]);
2408                 ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->windowed_signal_unaligned, &encoder->private_->windowed_signal);
2409         }
2410 #endif
2411         for(channel = 0; ok && channel < encoder->protected_->channels; channel++) {
2412                 for(i = 0; ok && i < 2; i++) {
2413                         ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]);
2414                 }
2415         }
2416         for(channel = 0; ok && channel < 2; channel++) {
2417                 for(i = 0; ok && i < 2; i++) {
2418                         ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]);
2419                 }
2420         }
2421         ok = ok && FLAC__memory_alloc_aligned_uint32_array(new_blocksize, &encoder->private_->abs_residual_unaligned, &encoder->private_->abs_residual);
2422         if(encoder->private_->precompute_partition_sums || encoder->protected_->do_escape_coding) /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
2423                 ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_blocksize * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums);
2424         if(encoder->protected_->do_escape_coding)
2425                 ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_blocksize * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition);
2426
2427         /* now adjust the windows if the blocksize has changed */
2428 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2429         if(ok && new_blocksize != encoder->private_->input_capacity && encoder->protected_->max_lpc_order > 0) {
2430                 for(i = 0; ok && i < encoder->protected_->num_apodizations; i++) {
2431                         switch(encoder->protected_->apodizations[i].type) {
2432                                 case FLAC__APODIZATION_BARTLETT:
2433                                         FLAC__window_bartlett(encoder->private_->window[i], new_blocksize);
2434                                         break;
2435                                 case FLAC__APODIZATION_BARTLETT_HANN:
2436                                         FLAC__window_bartlett_hann(encoder->private_->window[i], new_blocksize);
2437                                         break;
2438                                 case FLAC__APODIZATION_BLACKMAN:
2439                                         FLAC__window_blackman(encoder->private_->window[i], new_blocksize);
2440                                         break;
2441                                 case FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE:
2442                                         FLAC__window_blackman_harris_4term_92db_sidelobe(encoder->private_->window[i], new_blocksize);
2443                                         break;
2444                                 case FLAC__APODIZATION_CONNES:
2445                                         FLAC__window_connes(encoder->private_->window[i], new_blocksize);
2446                                         break;
2447                                 case FLAC__APODIZATION_FLATTOP:
2448                                         FLAC__window_flattop(encoder->private_->window[i], new_blocksize);
2449                                         break;
2450                                 case FLAC__APODIZATION_GAUSS:
2451                                         FLAC__window_gauss(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.gauss.stddev);
2452                                         break;
2453                                 case FLAC__APODIZATION_HAMMING:
2454                                         FLAC__window_hamming(encoder->private_->window[i], new_blocksize);
2455                                         break;
2456                                 case FLAC__APODIZATION_HANN:
2457                                         FLAC__window_hann(encoder->private_->window[i], new_blocksize);
2458                                         break;
2459                                 case FLAC__APODIZATION_KAISER_BESSEL:
2460                                         FLAC__window_kaiser_bessel(encoder->private_->window[i], new_blocksize);
2461                                         break;
2462                                 case FLAC__APODIZATION_NUTTALL:
2463                                         FLAC__window_nuttall(encoder->private_->window[i], new_blocksize);
2464                                         break;
2465                                 case FLAC__APODIZATION_RECTANGLE:
2466                                         FLAC__window_rectangle(encoder->private_->window[i], new_blocksize);
2467                                         break;
2468                                 case FLAC__APODIZATION_TRIANGLE:
2469                                         FLAC__window_triangle(encoder->private_->window[i], new_blocksize);
2470                                         break;
2471                                 case FLAC__APODIZATION_TUKEY:
2472                                         FLAC__window_tukey(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.tukey.p);
2473                                         break;
2474                                 case FLAC__APODIZATION_WELCH:
2475                                         FLAC__window_welch(encoder->private_->window[i], new_blocksize);
2476                                         break;
2477                                 default:
2478                                         FLAC__ASSERT(0);
2479                                         /* double protection */
2480                                         FLAC__window_hann(encoder->private_->window[i], new_blocksize);
2481                                         break;
2482                         }
2483                 }
2484         }
2485 #endif
2486
2487         if(ok)
2488                 encoder->private_->input_capacity = new_blocksize;
2489         else
2490                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
2491
2492         return ok;
2493 }
2494
2495 FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples)
2496 {
2497         const FLAC__byte *buffer;
2498         size_t bytes;
2499
2500         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
2501
2502         FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
2503
2504         if(encoder->protected_->verify) {
2505                 encoder->private_->verify.output.data = buffer;
2506                 encoder->private_->verify.output.bytes = bytes;
2507                 if(encoder->private_->verify.state_hint == ENCODER_IN_MAGIC) {
2508                         encoder->private_->verify.needs_magic_hack = true;
2509                 }
2510                 else {
2511                         if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) {
2512                                 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
2513                                 if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
2514                                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
2515                                 return false;
2516                         }
2517                 }
2518         }
2519
2520         if(write_frame_(encoder, buffer, bytes, samples) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2521                 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
2522                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2523                 return false;
2524         }
2525
2526         FLAC__bitbuffer_release_buffer(encoder->private_->frame);
2527
2528         if(samples > 0) {
2529                 encoder->private_->streaminfo.data.stream_info.min_framesize = min(bytes, encoder->private_->streaminfo.data.stream_info.min_framesize);
2530                 encoder->private_->streaminfo.data.stream_info.max_framesize = max(bytes, encoder->private_->streaminfo.data.stream_info.max_framesize);
2531         }
2532
2533         return true;
2534 }
2535
2536 FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples)
2537 {
2538         FLAC__StreamEncoderWriteStatus status;
2539         FLAC__uint64 output_position = 0;
2540
2541         /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */
2542         if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &output_position, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) {
2543                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2544                 return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
2545         }
2546
2547         /*
2548          * Watch for the STREAMINFO block and first SEEKTABLE block to go by and store their offsets.
2549          */
2550         if(samples == 0) {
2551                 FLAC__MetadataType type = (buffer[0] & 0x7f);
2552                 if(type == FLAC__METADATA_TYPE_STREAMINFO)
2553                         encoder->protected_->streaminfo_offset = output_position;
2554                 else if(type == FLAC__METADATA_TYPE_SEEKTABLE && encoder->protected_->seektable_offset == 0)
2555                         encoder->protected_->seektable_offset = output_position;
2556         }
2557
2558         /*
2559          * Mark the current seek point if hit (if audio_offset == 0 that
2560          * means we're still writing metadata and haven't hit the first
2561          * frame yet)
2562          */
2563         if(0 != encoder->private_->seek_table && encoder->protected_->audio_offset > 0 && encoder->private_->seek_table->num_points > 0) {
2564                 const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
2565                 const FLAC__uint64 frame_first_sample = encoder->private_->samples_written;
2566                 const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
2567                 FLAC__uint64 test_sample;
2568                 unsigned i;
2569                 for(i = encoder->private_->first_seekpoint_to_check; i < encoder->private_->seek_table->num_points; i++) {
2570                         test_sample = encoder->private_->seek_table->points[i].sample_number;
2571                         if(test_sample > frame_last_sample) {
2572                                 break;
2573                         }
2574                         else if(test_sample >= frame_first_sample) {
2575                                 encoder->private_->seek_table->points[i].sample_number = frame_first_sample;
2576                                 encoder->private_->seek_table->points[i].stream_offset = output_position - encoder->protected_->audio_offset;
2577                                 encoder->private_->seek_table->points[i].frame_samples = blocksize;
2578                                 encoder->private_->first_seekpoint_to_check++;
2579                                 /* DO NOT: "break;" and here's why:
2580                                  * The seektable template may contain more than one target
2581                                  * sample for any given frame; we will keep looping, generating
2582                                  * duplicate seekpoints for them, and we'll clean it up later,
2583                                  * just before writing the seektable back to the metadata.
2584                                  */
2585                         }
2586                         else {
2587                                 encoder->private_->first_seekpoint_to_check++;
2588                         }
2589                 }
2590         }
2591
2592 #if FLAC__HAS_OGG
2593         if(encoder->private_->is_ogg) {
2594                 status = FLAC__ogg_encoder_aspect_write_callback_wrapper(
2595                         &encoder->protected_->ogg_encoder_aspect,
2596                         FLAC__stream_encoder_get_total_samples_estimate(encoder),
2597                         buffer,
2598                         bytes,
2599                         samples,
2600                         encoder->private_->current_frame_number,
2601                         (FLAC__OggEncoderAspectWriteCallbackProxy)encoder->private_->write_callback,
2602                         encoder,
2603                         encoder->private_->client_data
2604                 );
2605         }
2606         else
2607 #endif
2608         status = encoder->private_->write_callback(encoder, buffer, bytes, samples, encoder->private_->current_frame_number, encoder->private_->client_data);
2609
2610         if(status == FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2611                 encoder->private_->bytes_written += bytes;
2612                 encoder->private_->samples_written += samples;
2613                 /* we keep a high watermark on the number of frames written because
2614                  * when the encoder goes back to write metadata, 'current_frame'
2615                  * will drop back to 0.
2616                  */
2617                 encoder->private_->frames_written = max(encoder->private_->frames_written, encoder->private_->current_frame_number+1);
2618         }
2619         else
2620                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2621
2622         return status;
2623 }
2624
2625 /* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks.  */
2626 void update_metadata_(const FLAC__StreamEncoder *encoder)
2627 {
2628         FLAC__byte b[max(6, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
2629         const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo;
2630         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
2631         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
2632         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
2633         const unsigned bps = metadata->data.stream_info.bits_per_sample;
2634         FLAC__StreamEncoderSeekStatus seek_status;
2635
2636         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
2637
2638         /* All this is based on intimate knowledge of the stream header
2639          * layout, but a change to the header format that would break this
2640          * would also break all streams encoded in the previous format.
2641          */
2642
2643         /*
2644          * Write MD5 signature
2645          */
2646         {
2647                 const unsigned md5_offset =
2648                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2649                         (
2650                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2651                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2652                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2653                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2654                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2655                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2656                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
2657                                 FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
2658                         ) / 8;
2659
2660                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + md5_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2661                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2662                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2663                         return;
2664                 }
2665                 if(encoder->private_->write_callback(encoder, metadata->data.stream_info.md5sum, 16, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2666                         encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2667                         return;
2668                 }
2669         }
2670
2671         /*
2672          * Write total samples
2673          */
2674         {
2675                 const unsigned total_samples_byte_offset =
2676                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2677                         (
2678                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2679                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2680                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2681                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2682                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2683                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2684                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
2685                                 - 4
2686                         ) / 8;
2687
2688                 b[0] = ((FLAC__byte)(bps-1) << 4) | (FLAC__byte)((samples >> 32) & 0x0F);
2689                 b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
2690                 b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
2691                 b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
2692                 b[4] = (FLAC__byte)(samples & 0xFF);
2693                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + total_samples_byte_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2694                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2695                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2696                         return;
2697                 }
2698                 if(encoder->private_->write_callback(encoder, b, 5, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2699                         encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2700                         return;
2701                 }
2702         }
2703
2704         /*
2705          * Write min/max framesize
2706          */
2707         {
2708                 const unsigned min_framesize_offset =
2709                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2710                         (
2711                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2712                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
2713                         ) / 8;
2714
2715                 b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
2716                 b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
2717                 b[2] = (FLAC__byte)(min_framesize & 0xFF);
2718                 b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
2719                 b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
2720                 b[5] = (FLAC__byte)(max_framesize & 0xFF);
2721                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + min_framesize_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2722                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2723                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2724                         return;
2725                 }
2726                 if(encoder->private_->write_callback(encoder, b, 6, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2727                         encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2728                         return;
2729                 }
2730         }
2731
2732         /*
2733          * Write seektable
2734          */
2735         if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
2736                 unsigned i;
2737
2738                 FLAC__format_seektable_sort(encoder->private_->seek_table);
2739
2740                 FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
2741
2742                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->seektable_offset + FLAC__STREAM_METADATA_HEADER_LENGTH, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2743                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2744                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2745                         return;
2746                 }
2747
2748                 for(i = 0; i < encoder->private_->seek_table->num_points; i++) {
2749                         FLAC__uint64 xx;
2750                         unsigned x;
2751                         xx = encoder->private_->seek_table->points[i].sample_number;
2752                         b[7] = (FLAC__byte)xx; xx >>= 8;
2753                         b[6] = (FLAC__byte)xx; xx >>= 8;
2754                         b[5] = (FLAC__byte)xx; xx >>= 8;
2755                         b[4] = (FLAC__byte)xx; xx >>= 8;
2756                         b[3] = (FLAC__byte)xx; xx >>= 8;
2757                         b[2] = (FLAC__byte)xx; xx >>= 8;
2758                         b[1] = (FLAC__byte)xx; xx >>= 8;
2759                         b[0] = (FLAC__byte)xx; xx >>= 8;
2760                         xx = encoder->private_->seek_table->points[i].stream_offset;
2761                         b[15] = (FLAC__byte)xx; xx >>= 8;
2762                         b[14] = (FLAC__byte)xx; xx >>= 8;
2763                         b[13] = (FLAC__byte)xx; xx >>= 8;
2764                         b[12] = (FLAC__byte)xx; xx >>= 8;
2765                         b[11] = (FLAC__byte)xx; xx >>= 8;
2766                         b[10] = (FLAC__byte)xx; xx >>= 8;
2767                         b[9] = (FLAC__byte)xx; xx >>= 8;
2768                         b[8] = (FLAC__byte)xx; xx >>= 8;
2769                         x = encoder->private_->seek_table->points[i].frame_samples;
2770                         b[17] = (FLAC__byte)x; x >>= 8;
2771                         b[16] = (FLAC__byte)x; x >>= 8;
2772                         if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2773                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2774                                 return;
2775                         }
2776                 }
2777         }
2778 }
2779
2780 #if FLAC__HAS_OGG
2781 /* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks.  */
2782 void update_ogg_metadata_(FLAC__StreamEncoder *encoder)
2783 {
2784         FLAC__byte b[max(6, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
2785         const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo;
2786         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
2787         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
2788         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
2789         ogg_page page;
2790
2791         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
2792
2793         /* All this is based on intimate knowledge of the stream header
2794          * layout, but a change to the header format that would break this
2795          * would also break all streams encoded in the previous format.
2796          */
2797
2798         /**
2799          ** Write STREAMINFO stats
2800          **/
2801         simple_ogg_page__init(&page);
2802         if(!simple_ogg_page__get_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
2803                 simple_ogg_page__clear(&page);
2804                 return; /* state already set */
2805         }
2806
2807         /*
2808          * Write MD5 signature
2809          */
2810         {
2811                 const unsigned md5_offset =
2812                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2813                         (
2814                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2815                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2816                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2817                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2818                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2819                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2820                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
2821                                 FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
2822                         ) / 8;
2823
2824                 if(md5_offset + 16 > (unsigned)page.body_len) {
2825                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2826                         simple_ogg_page__clear(&page);
2827                         return;
2828                 }
2829                 memcpy(page.body + md5_offset, metadata->data.stream_info.md5sum, 16);
2830         }
2831
2832         /*
2833          * Write total samples
2834          */
2835         {
2836                 const unsigned total_samples_byte_offset =
2837                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2838                         (
2839                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2840                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2841                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2842                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2843                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2844                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2845                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
2846                                 - 4
2847                         ) / 8;
2848
2849                 if(total_samples_byte_offset + 5 > (unsigned)page.body_len) {
2850                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2851                         simple_ogg_page__clear(&page);
2852                         return;
2853                 }
2854                 b[0] = (FLAC__byte)page.body[total_samples_byte_offset] & 0xF0;
2855                 b[0] |= (FLAC__byte)((samples >> 32) & 0x0F);
2856                 b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
2857                 b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
2858                 b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
2859                 b[4] = (FLAC__byte)(samples & 0xFF);
2860                 memcpy(page.body + total_samples_byte_offset, b, 5);
2861         }
2862
2863         /*
2864          * Write min/max framesize
2865          */
2866         {
2867                 const unsigned min_framesize_offset =
2868                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2869                         (
2870                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2871                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
2872                         ) / 8;
2873
2874                 if(min_framesize_offset + 6 > (unsigned)page.body_len) {
2875                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2876                         simple_ogg_page__clear(&page);
2877                         return;
2878                 }
2879                 b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
2880                 b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
2881                 b[2] = (FLAC__byte)(min_framesize & 0xFF);
2882                 b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
2883                 b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
2884                 b[5] = (FLAC__byte)(max_framesize & 0xFF);
2885                 memcpy(page.body + min_framesize_offset, b, 6);
2886         }
2887         if(!simple_ogg_page__set_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
2888                 simple_ogg_page__clear(&page);
2889                 return; /* state already set */
2890         }
2891         simple_ogg_page__clear(&page);
2892
2893         /*
2894          * Write seektable
2895          */
2896         if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
2897                 unsigned i;
2898                 FLAC__byte *p;
2899
2900                 FLAC__format_seektable_sort(encoder->private_->seek_table);
2901
2902                 FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
2903
2904                 simple_ogg_page__init(&page);
2905                 if(!simple_ogg_page__get_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
2906                         simple_ogg_page__clear(&page);
2907                         return; /* state already set */
2908                 }
2909
2910                 if(FLAC__STREAM_METADATA_HEADER_LENGTH + (18*encoder->private_->seek_table->num_points) > (unsigned)page.body_len) {
2911                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2912                         simple_ogg_page__clear(&page);
2913                         return;
2914                 }
2915
2916                 for(i = 0, p = page.body + FLAC__STREAM_METADATA_HEADER_LENGTH; i < encoder->private_->seek_table->num_points; i++, p += 18) {
2917                         FLAC__uint64 xx;
2918                         unsigned x;
2919                         xx = encoder->private_->seek_table->points[i].sample_number;
2920                         b[7] = (FLAC__byte)xx; xx >>= 8;
2921                         b[6] = (FLAC__byte)xx; xx >>= 8;
2922                         b[5] = (FLAC__byte)xx; xx >>= 8;
2923                         b[4] = (FLAC__byte)xx; xx >>= 8;
2924                         b[3] = (FLAC__byte)xx; xx >>= 8;
2925                         b[2] = (FLAC__byte)xx; xx >>= 8;
2926                         b[1] = (FLAC__byte)xx; xx >>= 8;
2927                         b[0] = (FLAC__byte)xx; xx >>= 8;
2928                         xx = encoder->private_->seek_table->points[i].stream_offset;
2929                         b[15] = (FLAC__byte)xx; xx >>= 8;
2930                         b[14] = (FLAC__byte)xx; xx >>= 8;
2931                         b[13] = (FLAC__byte)xx; xx >>= 8;
2932                         b[12] = (FLAC__byte)xx; xx >>= 8;
2933                         b[11] = (FLAC__byte)xx; xx >>= 8;
2934                         b[10] = (FLAC__byte)xx; xx >>= 8;
2935                         b[9] = (FLAC__byte)xx; xx >>= 8;
2936                         b[8] = (FLAC__byte)xx; xx >>= 8;
2937                         x = encoder->private_->seek_table->points[i].frame_samples;
2938                         b[17] = (FLAC__byte)x; x >>= 8;
2939                         b[16] = (FLAC__byte)x; x >>= 8;
2940                         if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2941                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2942                                 simple_ogg_page__clear(&page);
2943                                 return;
2944                         }
2945                         memcpy(p, b, 18);
2946                 }
2947
2948                 if(!simple_ogg_page__set_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
2949                         simple_ogg_page__clear(&page);
2950                         return; /* state already set */
2951                 }
2952                 simple_ogg_page__clear(&page);
2953         }
2954 }
2955 #endif
2956
2957 FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block)
2958 {
2959         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
2960
2961         /*
2962          * Accumulate raw signal to the MD5 signature
2963          */
2964         if(!FLAC__MD5Accumulate(&encoder->private_->md5context, (const FLAC__int32 * const *)encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) {
2965                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
2966                 return false;
2967         }
2968
2969         /*
2970          * Process the frame header and subframes into the frame bitbuffer
2971          */
2972         if(!process_subframes_(encoder, is_fractional_block)) {
2973                 /* the above function sets the state for us in case of an error */
2974                 return false;
2975         }
2976
2977         /*
2978          * Zero-pad the frame to a byte_boundary
2979          */
2980         if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(encoder->private_->frame)) {
2981                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
2982                 return false;
2983         }
2984
2985         /*
2986          * CRC-16 the whole thing
2987          */
2988         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
2989         FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__bitbuffer_get_write_crc16(encoder->private_->frame), FLAC__FRAME_FOOTER_CRC_LEN);
2990
2991         /*
2992          * Write it
2993          */
2994         if(!write_bitbuffer_(encoder, encoder->protected_->blocksize)) {
2995                 /* the above function sets the state for us in case of an error */
2996                 return false;
2997         }
2998
2999         /*
3000          * Get ready for the next frame
3001          */
3002         encoder->private_->current_sample_number = 0;
3003         encoder->private_->current_frame_number++;
3004         encoder->private_->streaminfo.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
3005
3006         return true;
3007 }
3008
3009 FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block)
3010 {
3011         FLAC__FrameHeader frame_header;
3012         unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order;
3013         FLAC__bool do_independent, do_mid_side, precompute_partition_sums;
3014
3015         /*
3016          * Calculate the min,max Rice partition orders
3017          */
3018         if(is_fractional_block) {
3019                 max_partition_order = 0;
3020         }
3021         else {
3022                 max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize(encoder->protected_->blocksize);
3023                 max_partition_order = min(max_partition_order, encoder->protected_->max_residual_partition_order);
3024         }
3025         min_partition_order = min(min_partition_order, max_partition_order);
3026
3027         precompute_partition_sums = encoder->private_->precompute_partition_sums && ((max_partition_order > min_partition_order) || encoder->protected_->do_escape_coding);
3028
3029         /*
3030          * Setup the frame
3031          */
3032         if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
3033                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
3034                 return false;
3035         }
3036         frame_header.blocksize = encoder->protected_->blocksize;
3037         frame_header.sample_rate = encoder->protected_->sample_rate;
3038         frame_header.channels = encoder->protected_->channels;
3039         frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */
3040         frame_header.bits_per_sample = encoder->protected_->bits_per_sample;
3041         frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
3042         frame_header.number.frame_number = encoder->private_->current_frame_number;
3043
3044         /*
3045          * Figure out what channel assignments to try
3046          */
3047         if(encoder->protected_->do_mid_side_stereo) {
3048                 if(encoder->protected_->loose_mid_side_stereo) {
3049                         if(encoder->private_->loose_mid_side_stereo_frame_count == 0) {
3050                                 do_independent = true;
3051                                 do_mid_side = true;
3052                         }
3053                         else {
3054                                 do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT);
3055                                 do_mid_side = !do_independent;
3056                         }
3057                 }
3058                 else {
3059                         do_independent = true;
3060                         do_mid_side = true;
3061                 }
3062         }
3063         else {
3064                 do_independent = true;
3065                 do_mid_side = false;
3066         }
3067
3068         FLAC__ASSERT(do_independent || do_mid_side);
3069
3070         /*
3071          * Check for wasted bits; set effective bps for each subframe
3072          */
3073         if(do_independent) {
3074                 for(channel = 0; channel < encoder->protected_->channels; channel++) {
3075                         const unsigned w = get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
3076                         encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w;
3077                         encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w;
3078                 }
3079         }
3080         if(do_mid_side) {
3081                 FLAC__ASSERT(encoder->protected_->channels == 2);
3082                 for(channel = 0; channel < 2; channel++) {
3083                         const unsigned w = get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize);
3084                         encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w;
3085                         encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1);
3086                 }
3087         }
3088
3089         /*
3090          * First do a normal encoding pass of each independent channel
3091          */
3092         if(do_independent) {
3093                 for(channel = 0; channel < encoder->protected_->channels; channel++) {
3094                         if(!
3095                                 process_subframe_(
3096                                         encoder,
3097                                         min_partition_order,
3098                                         max_partition_order,
3099                                         precompute_partition_sums,
3100                                         &frame_header,
3101                                         encoder->private_->subframe_bps[channel],
3102                                         encoder->private_->integer_signal[channel],
3103 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3104                                         encoder->private_->real_signal[channel],
3105 #endif
3106                                         encoder->private_->subframe_workspace_ptr[channel],
3107                                         encoder->private_->partitioned_rice_contents_workspace_ptr[channel],
3108                                         encoder->private_->residual_workspace[channel],
3109                                         encoder->private_->best_subframe+channel,
3110                                         encoder->private_->best_subframe_bits+channel
3111                                 )
3112                         )
3113                                 return false;
3114                 }
3115         }
3116
3117         /*
3118          * Now do mid and side channels if requested
3119          */
3120         if(do_mid_side) {
3121                 FLAC__ASSERT(encoder->protected_->channels == 2);
3122
3123                 for(channel = 0; channel < 2; channel++) {
3124                         if(!
3125                                 process_subframe_(
3126                                         encoder,
3127                                         min_partition_order,
3128                                         max_partition_order,
3129                                         precompute_partition_sums,
3130                                         &frame_header,
3131                                         encoder->private_->subframe_bps_mid_side[channel],
3132                                         encoder->private_->integer_signal_mid_side[channel],
3133 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3134                                         encoder->private_->real_signal_mid_side[channel],
3135 #endif
3136                                         encoder->private_->subframe_workspace_ptr_mid_side[channel],
3137                                         encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[channel],
3138                                         encoder->private_->residual_workspace_mid_side[channel],
3139                                         encoder->private_->best_subframe_mid_side+channel,
3140                                         encoder->private_->best_subframe_bits_mid_side+channel
3141                                 )
3142                         )
3143                                 return false;
3144                 }
3145         }
3146
3147         /*
3148          * Compose the frame bitbuffer
3149          */
3150         if(do_mid_side) {
3151                 unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */
3152                 FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */
3153                 FLAC__ChannelAssignment channel_assignment;
3154
3155                 FLAC__ASSERT(encoder->protected_->channels == 2);
3156
3157                 if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) {
3158                         channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE);
3159                 }
3160                 else {
3161                         unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */
3162                         unsigned min_bits;
3163                         FLAC__ChannelAssignment ca;
3164
3165                         FLAC__ASSERT(do_independent && do_mid_side);
3166
3167                         /* We have to figure out which channel assignent results in the smallest frame */
3168                         bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits         [0] + encoder->private_->best_subframe_bits         [1];
3169                         bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE  ] = encoder->private_->best_subframe_bits         [0] + encoder->private_->best_subframe_bits_mid_side[1];
3170                         bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits         [1] + encoder->private_->best_subframe_bits_mid_side[1];
3171                         bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE   ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1];
3172
3173                         for(channel_assignment = (FLAC__ChannelAssignment)0, min_bits = bits[0], ca = (FLAC__ChannelAssignment)1; (int)ca <= 3; ca = (FLAC__ChannelAssignment)((int)ca + 1)) {
3174                                 if(bits[ca] < min_bits) {
3175                                         min_bits = bits[ca];
3176                                         channel_assignment = ca;
3177                                 }
3178                         }
3179                 }
3180
3181                 frame_header.channel_assignment = channel_assignment;
3182
3183                 if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) {
3184                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3185                         return false;
3186                 }
3187
3188                 switch(channel_assignment) {
3189                         case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
3190                                 left_subframe  = &encoder->private_->subframe_workspace         [0][encoder->private_->best_subframe         [0]];
3191                                 right_subframe = &encoder->private_->subframe_workspace         [1][encoder->private_->best_subframe         [1]];
3192                                 break;
3193                         case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
3194                                 left_subframe  = &encoder->private_->subframe_workspace         [0][encoder->private_->best_subframe         [0]];
3195                                 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
3196                                 break;
3197                         case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
3198                                 left_subframe  = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
3199                                 right_subframe = &encoder->private_->subframe_workspace         [1][encoder->private_->best_subframe         [1]];
3200                                 break;
3201                         case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
3202                                 left_subframe  = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
3203                                 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
3204                                 break;
3205                         default:
3206                                 FLAC__ASSERT(0);
3207                 }
3208
3209                 switch(channel_assignment) {
3210                         case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
3211                                 left_bps  = encoder->private_->subframe_bps         [0];
3212                                 right_bps = encoder->private_->subframe_bps         [1];
3213                                 break;
3214                         case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
3215                                 left_bps  = encoder->private_->subframe_bps         [0];
3216                                 right_bps = encoder->private_->subframe_bps_mid_side[1];
3217                                 break;
3218                         case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
3219                                 left_bps  = encoder->private_->subframe_bps_mid_side[1];
3220                                 right_bps = encoder->private_->subframe_bps         [1];
3221                                 break;
3222                         case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
3223                                 left_bps  = encoder->private_->subframe_bps_mid_side[0];
3224                                 right_bps = encoder->private_->subframe_bps_mid_side[1];
3225                                 break;
3226                         default:
3227                                 FLAC__ASSERT(0);
3228                 }
3229
3230                 /* note that encoder_add_subframe_ sets the state for us in case of an error */
3231                 if(!add_subframe_(encoder, &frame_header, left_bps , left_subframe , encoder->private_->frame))
3232                         return false;
3233                 if(!add_subframe_(encoder, &frame_header, right_bps, right_subframe, encoder->private_->frame))
3234                         return false;
3235         }
3236         else {
3237                 if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) {
3238                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3239                         return false;
3240                 }
3241
3242                 for(channel = 0; channel < encoder->protected_->channels; channel++) {
3243                         if(!add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) {
3244                                 /* the above function sets the state for us in case of an error */
3245                                 return false;
3246                         }
3247                 }
3248         }
3249
3250         if(encoder->protected_->loose_mid_side_stereo) {
3251                 encoder->private_->loose_mid_side_stereo_frame_count++;
3252                 if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames)
3253                         encoder->private_->loose_mid_side_stereo_frame_count = 0;
3254         }
3255
3256         encoder->private_->last_channel_assignment = frame_header.channel_assignment;
3257
3258         return true;
3259 }
3260
3261 FLAC__bool process_subframe_(
3262         FLAC__StreamEncoder *encoder,
3263         unsigned min_partition_order,
3264         unsigned max_partition_order,
3265         FLAC__bool precompute_partition_sums,
3266         const FLAC__FrameHeader *frame_header,
3267         unsigned subframe_bps,
3268         const FLAC__int32 integer_signal[],
3269 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3270         const FLAC__real real_signal[],
3271 #endif
3272         FLAC__Subframe *subframe[2],
3273         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
3274         FLAC__int32 *residual[2],
3275         unsigned *best_subframe,
3276         unsigned *best_bits
3277 )
3278 {
3279 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3280         FLAC__float fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
3281 #else
3282         FLAC__fixedpoint fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
3283 #endif
3284 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3285         FLAC__double lpc_residual_bits_per_sample;
3286         FLAC__real autoc[FLAC__MAX_LPC_ORDER+1]; /* WATCHOUT: the size is important even though encoder->protected_->max_lpc_order might be less; some asm routines need all the space */
3287         FLAC__double lpc_error[FLAC__MAX_LPC_ORDER];
3288         unsigned min_lpc_order, max_lpc_order, lpc_order;
3289         unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision;
3290 #endif
3291         unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order;
3292         unsigned rice_parameter;
3293         unsigned _candidate_bits, _best_bits;
3294         unsigned _best_subframe;
3295
3296         /* verbatim subframe is the baseline against which we measure other compressed subframes */
3297         _best_subframe = 0;
3298         if(encoder->private_->disable_verbatim_subframes && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER)
3299                 _best_bits = UINT_MAX;
3300         else
3301                 _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
3302
3303         if(frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) {
3304                 unsigned signal_is_constant = false;
3305                 guess_fixed_order = encoder->private_->local_fixed_compute_best_predictor(integer_signal+FLAC__MAX_FIXED_ORDER, frame_header->blocksize-FLAC__MAX_FIXED_ORDER, fixed_residual_bits_per_sample);
3306                 /* check for constant subframe */
3307                 if(
3308                         !encoder->private_->disable_constant_subframes &&
3309 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3310                         fixed_residual_bits_per_sample[1] == 0.0
3311 #else
3312                         fixed_residual_bits_per_sample[1] == FLAC__FP_ZERO
3313 #endif
3314                 ) {
3315                         /* the above means it's possible all samples are the same value; now double-check it: */
3316                         unsigned i;
3317                         signal_is_constant = true;
3318                         for(i = 1; i < frame_header->blocksize; i++) {
3319                                 if(integer_signal[0] != integer_signal[i]) {
3320                                         signal_is_constant = false;
3321                                         break;
3322                                 }
3323                         }
3324                 }
3325                 if(signal_is_constant) {
3326                         _candidate_bits = evaluate_constant_subframe_(integer_signal[0], subframe_bps, subframe[!_best_subframe]);
3327                         if(_candidate_bits < _best_bits) {
3328                                 _best_subframe = !_best_subframe;
3329                                 _best_bits = _candidate_bits;
3330                         }
3331                 }
3332                 else {
3333                         if(!encoder->private_->disable_fixed_subframes || (encoder->protected_->max_lpc_order == 0 && _best_bits == UINT_MAX)) {
3334                                 /* encode fixed */
3335                                 if(encoder->protected_->do_exhaustive_model_search) {
3336                                         min_fixed_order = 0;
3337                                         max_fixed_order = FLAC__MAX_FIXED_ORDER;
3338                                 }
3339                                 else {
3340                                         min_fixed_order = max_fixed_order = guess_fixed_order;
3341                                 }
3342                                 for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) {
3343 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3344                                         if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__float)subframe_bps)
3345                                                 continue; /* don't even try */
3346                                         rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > 0.0)? (unsigned)(fixed_residual_bits_per_sample[fixed_order]+0.5) : 0; /* 0.5 is for rounding */
3347 #else
3348                                         if(FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]) >= (int)subframe_bps)
3349                                                 continue; /* don't even try */
3350                                         rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > FLAC__FP_ZERO)? (unsigned)FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]+FLAC__FP_ONE_HALF) : 0; /* 0.5 is for rounding */
3351 #endif
3352                                         rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
3353                                         if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
3354 #ifdef DEBUG_VERBOSE
3355                                                 fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
3356 #endif
3357                                                 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
3358                                         }
3359                                         _candidate_bits =
3360                                                 evaluate_fixed_subframe_(
3361                                                         encoder,
3362                                                         integer_signal,
3363                                                         residual[!_best_subframe],
3364                                                         encoder->private_->abs_residual,
3365                                                         encoder->private_->abs_residual_partition_sums,
3366                                                         encoder->private_->raw_bits_per_partition,
3367                                                         frame_header->blocksize,
3368                                                         subframe_bps,
3369                                                         fixed_order,
3370                                                         rice_parameter,
3371                                                         min_partition_order,
3372                                                         max_partition_order,
3373                                                         precompute_partition_sums,
3374                                                         encoder->protected_->do_escape_coding,
3375                                                         encoder->protected_->rice_parameter_search_dist,
3376                                                         subframe[!_best_subframe],
3377                                                         partitioned_rice_contents[!_best_subframe]
3378                                                 );
3379                                         if(_candidate_bits < _best_bits) {
3380                                                 _best_subframe = !_best_subframe;
3381                                                 _best_bits = _candidate_bits;
3382                                         }
3383                                 }
3384                         }
3385
3386 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3387                         /* encode lpc */
3388                         if(encoder->protected_->max_lpc_order > 0) {
3389                                 if(encoder->protected_->max_lpc_order >= frame_header->blocksize)
3390                                         max_lpc_order = frame_header->blocksize-1;
3391                                 else
3392                                         max_lpc_order = encoder->protected_->max_lpc_order;
3393                                 if(max_lpc_order > 0) {
3394                                         unsigned a;
3395                                         for (a = 0; a < encoder->protected_->num_apodizations; a++) {
3396                                                 FLAC__lpc_window_data(real_signal, encoder->private_->window[a], encoder->private_->windowed_signal, frame_header->blocksize);
3397                                                 encoder->private_->local_lpc_compute_autocorrelation(encoder->private_->windowed_signal, frame_header->blocksize, max_lpc_order+1, autoc);
3398                                                 /* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */
3399                                                 if(autoc[0] != 0.0) {
3400                                                         FLAC__lpc_compute_lp_coefficients(autoc, max_lpc_order, encoder->private_->lp_coeff, lpc_error);
3401                                                         if(encoder->protected_->do_exhaustive_model_search) {
3402                                                                 min_lpc_order = 1;
3403                                                         }
3404                                                         else {
3405                                                                 const unsigned guess_lpc_order =
3406                                                                         FLAC__lpc_compute_best_order(
3407                                                                                 lpc_error,
3408                                                                                 max_lpc_order,
3409                                                                                 frame_header->blocksize,
3410                                                                                 subframe_bps + (
3411                                                                                         encoder->protected_->do_qlp_coeff_prec_search?
3412                                                                                                 FLAC__MIN_QLP_COEFF_PRECISION : /* have to guess; use the min possible size to avoid accidentally favoring lower orders */
3413                                                                                                 encoder->protected_->qlp_coeff_precision
3414                                                                                 )
3415                                                                         );
3416                                                                 min_lpc_order = max_lpc_order = guess_lpc_order;
3417                                                         }
3418                                                         for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) {
3419                                                                 lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order);
3420                                                                 if(lpc_residual_bits_per_sample >= (FLAC__double)subframe_bps)
3421                                                                         continue; /* don't even try */
3422                                                                 rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */
3423                                                                 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
3424                                                                 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
3425 #ifdef DEBUG_VERBOSE
3426                                                                         fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
3427 #endif
3428                                                                         rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
3429                                                                 }
3430                                                                 if(encoder->protected_->do_qlp_coeff_prec_search) {
3431                                                                         min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
3432                                                                         /* try to ensure a 32-bit datapath throughout for 16bps(+1bps for side channel) or less */
3433                                                                         if(subframe_bps <= 17) {
3434                                                                                 max_qlp_coeff_precision = min(32 - subframe_bps - lpc_order, FLAC__MAX_QLP_COEFF_PRECISION);
3435                                                                                 max_qlp_coeff_precision = max(max_qlp_coeff_precision, min_qlp_coeff_precision);
3436                                                                         }
3437                                                                         else
3438                                                                                 max_qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
3439                                                                 }
3440                                                                 else {
3441                                                                         min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision;
3442                                                                 }
3443                                                                 for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) {
3444                                                                         _candidate_bits =
3445                                                                                 evaluate_lpc_subframe_(
3446                                                                                         encoder,
3447                                                                                         integer_signal,
3448                                                                                         residual[!_best_subframe],
3449                                                                                         encoder->private_->abs_residual,
3450                                                                                         encoder->private_->abs_residual_partition_sums,
3451                                                                                         encoder->private_->raw_bits_per_partition,
3452                                                                                         encoder->private_->lp_coeff[lpc_order-1],
3453                                                                                         frame_header->blocksize,
3454                                                                                         subframe_bps,
3455                                                                                         lpc_order,
3456                                                                                         qlp_coeff_precision,
3457                                                                                         rice_parameter,
3458                                                                                         min_partition_order,
3459                                                                                         max_partition_order,
3460                                                                                         precompute_partition_sums,
3461                                                                                         encoder->protected_->do_escape_coding,
3462                                                                                         encoder->protected_->rice_parameter_search_dist,
3463                                                                                         subframe[!_best_subframe],
3464                                                                                         partitioned_rice_contents[!_best_subframe]
3465                                                                                 );
3466                                                                         if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */
3467                                                                                 if(_candidate_bits < _best_bits) {
3468                                                                                         _best_subframe = !_best_subframe;
3469                                                                                         _best_bits = _candidate_bits;
3470                                                                                 }
3471                                                                         }
3472                                                                 }
3473                                                         }
3474                                                 }
3475                                         }
3476                                 }
3477                         }
3478 #endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
3479                 }
3480         }
3481
3482         /* under rare circumstances this can happen when all but lpc subframe types are disabled: */
3483         if(_best_bits == UINT_MAX) {
3484                 FLAC__ASSERT(_best_subframe == 0);
3485                 _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
3486         }
3487
3488         *best_subframe = _best_subframe;
3489         *best_bits = _best_bits;
3490
3491         return true;
3492 }
3493
3494 FLAC__bool add_subframe_(
3495         FLAC__StreamEncoder *encoder,
3496         const FLAC__FrameHeader *frame_header,
3497         unsigned subframe_bps,
3498         const FLAC__Subframe *subframe,
3499         FLAC__BitBuffer *frame
3500 )
3501 {
3502         switch(subframe->type) {
3503                 case FLAC__SUBFRAME_TYPE_CONSTANT:
3504                         if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) {
3505                                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3506                                 return false;
3507                         }
3508                         break;
3509                 case FLAC__SUBFRAME_TYPE_FIXED:
3510                         if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), frame_header->blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) {
3511                                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3512                                 return false;
3513                         }
3514                         break;
3515                 case FLAC__SUBFRAME_TYPE_LPC:
3516                         if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), frame_header->blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) {
3517                                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3518                                 return false;
3519                         }
3520                         break;
3521                 case FLAC__SUBFRAME_TYPE_VERBATIM:
3522                         if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), frame_header->blocksize, subframe_bps, subframe->wasted_bits, frame)) {
3523                                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3524                                 return false;
3525                         }
3526                         break;
3527                 default:
3528                         FLAC__ASSERT(0);
3529         }
3530
3531         return true;
3532 }
3533
3534 unsigned evaluate_constant_subframe_(
3535         const FLAC__int32 signal,
3536         unsigned subframe_bps,
3537         FLAC__Subframe *subframe
3538 )
3539 {
3540         subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT;
3541         subframe->data.constant.value = signal;
3542
3543         return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe_bps;
3544 }
3545
3546 unsigned evaluate_fixed_subframe_(
3547         FLAC__StreamEncoder *encoder,
3548         const FLAC__int32 signal[],
3549         FLAC__int32 residual[],
3550         FLAC__uint32 abs_residual[],
3551         FLAC__uint64 abs_residual_partition_sums[],
3552         unsigned raw_bits_per_partition[],
3553         unsigned blocksize,
3554         unsigned subframe_bps,
3555         unsigned order,
3556         unsigned rice_parameter,
3557         unsigned min_partition_order,
3558         unsigned max_partition_order,
3559         FLAC__bool precompute_partition_sums,
3560         FLAC__bool do_escape_coding,
3561         unsigned rice_parameter_search_dist,
3562         FLAC__Subframe *subframe,
3563         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
3564 )
3565 {
3566         unsigned i, residual_bits;
3567         const unsigned residual_samples = blocksize - order;
3568
3569         FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual);
3570
3571         subframe->type = FLAC__SUBFRAME_TYPE_FIXED;
3572
3573         subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
3574         subframe->data.fixed.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents;
3575         subframe->data.fixed.residual = residual;
3576
3577         residual_bits =
3578                 find_best_partition_order_(
3579                         encoder->private_,
3580                         residual,
3581                         abs_residual,
3582                         abs_residual_partition_sums,
3583                         raw_bits_per_partition,
3584                         residual_samples,
3585                         order,
3586                         rice_parameter,
3587                         min_partition_order,
3588                         max_partition_order,
3589                         precompute_partition_sums,
3590                         do_escape_coding,
3591                         rice_parameter_search_dist,
3592                         &subframe->data.fixed.entropy_coding_method.data.partitioned_rice
3593                 );
3594
3595         subframe->data.fixed.order = order;
3596         for(i = 0; i < order; i++)
3597                 subframe->data.fixed.warmup[i] = signal[i];
3598
3599         return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (order * subframe_bps) + residual_bits;
3600 }
3601
3602 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3603 unsigned evaluate_lpc_subframe_(
3604         FLAC__StreamEncoder *encoder,
3605         const FLAC__int32 signal[],
3606         FLAC__int32 residual[],
3607         FLAC__uint32 abs_residual[],
3608         FLAC__uint64 abs_residual_partition_sums[],
3609         unsigned raw_bits_per_partition[],
3610         const FLAC__real lp_coeff[],
3611         unsigned blocksize,
3612         unsigned subframe_bps,
3613         unsigned order,
3614         unsigned qlp_coeff_precision,
3615         unsigned rice_parameter,
3616         unsigned min_partition_order,
3617         unsigned max_partition_order,
3618         FLAC__bool precompute_partition_sums,
3619         FLAC__bool do_escape_coding,
3620         unsigned rice_parameter_search_dist,
3621         FLAC__Subframe *subframe,
3622         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
3623 )
3624 {
3625         FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER];
3626         unsigned i, residual_bits;
3627         int quantization, ret;
3628         const unsigned residual_samples = blocksize - order;
3629
3630         /* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */
3631         if(subframe_bps <= 16) {
3632                 FLAC__ASSERT(order > 0);
3633                 FLAC__ASSERT(order <= FLAC__MAX_LPC_ORDER);
3634                 qlp_coeff_precision = min(qlp_coeff_precision, 32 - subframe_bps - FLAC__bitmath_ilog2(order));
3635         }
3636
3637         ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, qlp_coeff, &quantization);
3638         if(ret != 0)
3639                 return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */
3640
3641         if(subframe_bps + qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
3642                 if(subframe_bps <= 16 && qlp_coeff_precision <= 16)
3643                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
3644                 else
3645                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
3646         else
3647                 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
3648
3649         subframe->type = FLAC__SUBFRAME_TYPE_LPC;
3650
3651         subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
3652         subframe->data.lpc.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents;
3653         subframe->data.lpc.residual = residual;
3654
3655         residual_bits =
3656                 find_best_partition_order_(
3657                         encoder->private_,
3658                         residual,
3659                         abs_residual,
3660                         abs_residual_partition_sums,
3661                         raw_bits_per_partition,
3662                         residual_samples,
3663                         order,
3664                         rice_parameter,
3665                         min_partition_order,
3666                         max_partition_order,
3667                         precompute_partition_sums,
3668                         do_escape_coding,
3669                         rice_parameter_search_dist,
3670                         &subframe->data.fixed.entropy_coding_method.data.partitioned_rice
3671                 );
3672
3673         subframe->data.lpc.order = order;
3674         subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision;
3675         subframe->data.lpc.quantization_level = quantization;
3676         memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER);
3677         for(i = 0; i < order; i++)
3678                 subframe->data.lpc.warmup[i] = signal[i];
3679
3680         return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN + FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN + (order * (qlp_coeff_precision + subframe_bps)) + residual_bits;
3681 }
3682 #endif
3683
3684 unsigned evaluate_verbatim_subframe_(
3685         const FLAC__int32 signal[],
3686         unsigned blocksize,
3687         unsigned subframe_bps,
3688         FLAC__Subframe *subframe
3689 )
3690 {
3691         subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM;
3692
3693         subframe->data.verbatim.data = signal;
3694
3695         return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (blocksize * subframe_bps);
3696 }
3697
3698 unsigned find_best_partition_order_(
3699         FLAC__StreamEncoderPrivate *private_,
3700         const FLAC__int32 residual[],
3701         FLAC__uint32 abs_residual[],
3702         FLAC__uint64 abs_residual_partition_sums[],
3703         unsigned raw_bits_per_partition[],
3704         unsigned residual_samples,
3705         unsigned predictor_order,
3706         unsigned rice_parameter,
3707         unsigned min_partition_order,
3708         unsigned max_partition_order,
3709         FLAC__bool precompute_partition_sums,
3710         FLAC__bool do_escape_coding,
3711         unsigned rice_parameter_search_dist,
3712         FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice
3713 )
3714 {
3715         FLAC__int32 r;
3716         unsigned residual_bits, best_residual_bits = 0;
3717         unsigned residual_sample;
3718         unsigned best_parameters_index = 0;
3719         const unsigned blocksize = residual_samples + predictor_order;
3720
3721         /* compute abs(residual) for use later */
3722         for(residual_sample = 0; residual_sample < residual_samples; residual_sample++) {
3723                 r = residual[residual_sample];
3724                 abs_residual[residual_sample] = (FLAC__uint32)(r<0? -r : r);
3725         }
3726
3727         max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(max_partition_order, blocksize, predictor_order);
3728         min_partition_order = min(min_partition_order, max_partition_order);
3729
3730         if(precompute_partition_sums) {
3731                 int partition_order;
3732                 unsigned sum;
3733
3734                 precompute_partition_info_sums_(abs_residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order);
3735
3736                 if(do_escape_coding)
3737                         precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order);
3738
3739                 for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) {
3740 #ifdef DONT_ESTIMATE_RICE_BITS
3741                         if(!
3742                                 set_partitioned_rice_with_precompute_(
3743                                         residual,
3744                                         abs_residual_partition_sums+sum,
3745                                         raw_bits_per_partition+sum,
3746                                         residual_samples,
3747                                         predictor_order,
3748                                         rice_parameter,
3749                                         rice_parameter_search_dist,
3750                                         (unsigned)partition_order,
3751                                         do_escape_coding,
3752                                         &private_->partitioned_rice_contents_extra[!best_parameters_index],
3753                                         &residual_bits
3754                                 )
3755                         )
3756 #else
3757                         if(!
3758                                 set_partitioned_rice_with_precompute_(
3759                                         abs_residual,
3760                                         abs_residual_partition_sums+sum,
3761                                         raw_bits_per_partition+sum,
3762                                         residual_samples,
3763                                         predictor_order,
3764                                         rice_parameter,
3765                                         rice_parameter_search_dist,
3766                                         (unsigned)partition_order,
3767                                         do_escape_coding,
3768                                         &private_->partitioned_rice_contents_extra[!best_parameters_index],
3769                                         &residual_bits
3770                                 )
3771                         )
3772 #endif
3773                         {
3774                                 FLAC__ASSERT(best_residual_bits != 0);
3775                                 break;
3776                         }
3777                         sum += 1u << partition_order;
3778                         if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
3779                                 best_residual_bits = residual_bits;
3780                                 best_parameters_index = !best_parameters_index;
3781                                 best_partitioned_rice->order = partition_order;
3782                         }
3783                 }
3784         }
3785         else {
3786                 unsigned partition_order;
3787                 for(partition_order = min_partition_order; partition_order <= max_partition_order; partition_order++) {
3788 #ifdef DONT_ESTIMATE_RICE_BITS
3789                         if(!
3790                                 set_partitioned_rice_(
3791                                         abs_residual,
3792                                         residual,
3793                                         residual_samples,
3794                                         predictor_order,
3795                                         rice_parameter,
3796                                         rice_parameter_search_dist,
3797                                         partition_order,
3798                                         &private_->partitioned_rice_contents_extra[!best_parameters_index],
3799                                         &residual_bits
3800                                 )
3801                         )
3802 #else
3803                         if(!
3804                                 set_partitioned_rice_(
3805                                         abs_residual,
3806                                         residual_samples,
3807                                         predictor_order,
3808                                         rice_parameter,
3809                                         rice_parameter_search_dist,
3810                                         partition_order,
3811                                         &private_->partitioned_rice_contents_extra[!best_parameters_index],
3812                                         &residual_bits
3813                                 )
3814                         )
3815 #endif
3816                         {
3817                                 FLAC__ASSERT(best_residual_bits != 0);
3818                                 break;
3819                         }
3820                         if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
3821                                 best_residual_bits = residual_bits;
3822                                 best_parameters_index = !best_parameters_index;
3823                                 best_partitioned_rice->order = partition_order;
3824                         }
3825                 }
3826         }
3827
3828         /*
3829          * We are allowed to de-const the pointer based on our special knowledge;
3830          * it is const to the outside world.
3831          */
3832         {
3833                 FLAC__EntropyCodingMethod_PartitionedRiceContents* best_partitioned_rice_contents = (FLAC__EntropyCodingMethod_PartitionedRiceContents*)best_partitioned_rice->contents;
3834                 FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(best_partitioned_rice_contents, max(6, best_partitioned_rice->order));
3835                 memcpy(best_partitioned_rice_contents->parameters, private_->partitioned_rice_contents_extra[best_parameters_index].parameters, sizeof(unsigned)*(1<<(best_partitioned_rice->order)));
3836                 memcpy(best_partitioned_rice_contents->raw_bits, private_->partitioned_rice_contents_extra[best_parameters_index].raw_bits, sizeof(unsigned)*(1<<(best_partitioned_rice->order)));
3837         }
3838
3839         return best_residual_bits;
3840 }
3841
3842 void precompute_partition_info_sums_(
3843         const FLAC__uint32 abs_residual[],
3844         FLAC__uint64 abs_residual_partition_sums[],
3845         unsigned residual_samples,
3846         unsigned predictor_order,
3847         unsigned min_partition_order,
3848         unsigned max_partition_order
3849 )
3850 {
3851         int partition_order;
3852         unsigned from_partition, to_partition = 0;
3853         const unsigned blocksize = residual_samples + predictor_order;
3854
3855         /* first do max_partition_order */
3856         for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
3857                 FLAC__uint64 abs_residual_partition_sum;
3858                 FLAC__uint32 abs_r;
3859                 unsigned partition, partition_sample, partition_samples, residual_sample;
3860                 const unsigned partitions = 1u << partition_order;
3861                 const unsigned default_partition_samples = blocksize >> partition_order;
3862
3863                 FLAC__ASSERT(default_partition_samples > predictor_order);
3864
3865                 for(partition = residual_sample = 0; partition < partitions; partition++) {
3866                         partition_samples = default_partition_samples;
3867                         if(partition == 0)
3868                                 partition_samples -= predictor_order;
3869                         abs_residual_partition_sum = 0;
3870                         for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
3871                                 abs_r = abs_residual[residual_sample];
3872                                 abs_residual_partition_sum += abs_r;
3873                                 residual_sample++;
3874                         }
3875                         abs_residual_partition_sums[partition] = abs_residual_partition_sum;
3876                 }
3877                 to_partition = partitions;
3878                 break;
3879         }
3880
3881         /* now merge partitions for lower orders */
3882         for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
3883                 FLAC__uint64 s;
3884                 unsigned i;
3885                 const unsigned partitions = 1u << partition_order;
3886                 for(i = 0; i < partitions; i++) {
3887                         s = abs_residual_partition_sums[from_partition];
3888                         from_partition++;
3889                         abs_residual_partition_sums[to_partition] = s + abs_residual_partition_sums[from_partition];
3890                         from_partition++;
3891                         to_partition++;
3892                 }
3893         }
3894 }
3895
3896 void precompute_partition_info_escapes_(
3897         const FLAC__int32 residual[],
3898         unsigned raw_bits_per_partition[],
3899         unsigned residual_samples,
3900         unsigned predictor_order,
3901         unsigned min_partition_order,
3902         unsigned max_partition_order
3903 )
3904 {
3905         int partition_order;
3906         unsigned from_partition, to_partition = 0;
3907         const unsigned blocksize = residual_samples + predictor_order;
3908
3909         /* first do max_partition_order */
3910         for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
3911                 FLAC__int32 r, residual_partition_min, residual_partition_max;
3912                 unsigned silog2_min, silog2_max;
3913                 unsigned partition, partition_sample, partition_samples, residual_sample;
3914                 const unsigned partitions = 1u << partition_order;
3915                 const unsigned default_partition_samples = blocksize >> partition_order;
3916
3917                 FLAC__ASSERT(default_partition_samples > predictor_order);
3918
3919                 for(partition = residual_sample = 0; partition < partitions; partition++) {
3920                         partition_samples = default_partition_samples;
3921                         if(partition == 0)
3922                                 partition_samples -= predictor_order;
3923                         residual_partition_min = residual_partition_max = 0;
3924                         for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
3925                                 r = residual[residual_sample];
3926                                 if(r < residual_partition_min)
3927                                         residual_partition_min = r;
3928                                 else if(r > residual_partition_max)
3929                                         residual_partition_max = r;
3930                                 residual_sample++;
3931                         }
3932                         silog2_min = FLAC__bitmath_silog2(residual_partition_min);
3933                         silog2_max = FLAC__bitmath_silog2(residual_partition_max);
3934                         raw_bits_per_partition[partition] = max(silog2_min, silog2_max);
3935                 }
3936                 to_partition = partitions;
3937                 break; /*@@@ yuck, should remove the 'for' loop instead */
3938         }
3939
3940         /* now merge partitions for lower orders */
3941         for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
3942                 unsigned m;
3943                 unsigned i;
3944                 const unsigned partitions = 1u << partition_order;
3945                 for(i = 0; i < partitions; i++) {
3946                         m = raw_bits_per_partition[from_partition];
3947                         from_partition++;
3948                         raw_bits_per_partition[to_partition] = max(m, raw_bits_per_partition[from_partition]);
3949                         from_partition++;
3950                         to_partition++;
3951                 }
3952         }
3953 }
3954
3955 #ifdef VARIABLE_RICE_BITS
3956 #undef VARIABLE_RICE_BITS
3957 #endif
3958 #ifndef DONT_ESTIMATE_RICE_BITS
3959 #define VARIABLE_RICE_BITS(value, parameter) ((value) >> (parameter))
3960 #endif
3961
3962 #ifdef DONT_ESTIMATE_RICE_BITS
3963 FLAC__bool set_partitioned_rice_(
3964         const FLAC__uint32 abs_residual[],
3965         const FLAC__int32 residual[],
3966         const unsigned residual_samples,
3967         const unsigned predictor_order,
3968         const unsigned suggested_rice_parameter,
3969         const unsigned rice_parameter_search_dist,
3970         const unsigned partition_order,
3971         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
3972         unsigned *bits
3973 )
3974 #else
3975 FLAC__bool set_partitioned_rice_(
3976         const FLAC__uint32 abs_residual[],
3977         const unsigned residual_samples,
3978         const unsigned predictor_order,
3979         const unsigned suggested_rice_parameter,
3980         const unsigned rice_parameter_search_dist,
3981         const unsigned partition_order,
3982         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
3983         unsigned *bits
3984 )
3985 #endif
3986 {
3987         unsigned rice_parameter, partition_bits;
3988 #ifndef NO_RICE_SEARCH
3989         unsigned best_partition_bits;
3990         unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
3991 #endif
3992         unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
3993         unsigned *parameters;
3994
3995         FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
3996
3997         FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order));
3998         parameters = partitioned_rice_contents->parameters;
3999
4000         if(partition_order == 0) {
4001                 unsigned i;
4002
4003 #ifndef NO_RICE_SEARCH
4004                 if(rice_parameter_search_dist) {
4005                         if(suggested_rice_parameter < rice_parameter_search_dist)
4006                                 min_rice_parameter = 0;
4007                         else
4008                                 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
4009                         max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
4010                         if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
4011 #ifdef DEBUG_VERBOSE
4012                                 fprintf(stderr, "clipping rice_parameter (%u -> %u) @2\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
4013 #endif
4014                                 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
4015                         }
4016                 }
4017                 else
4018                         min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
4019
4020                 best_partition_bits = 0xffffffff;
4021                 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
4022 #endif
4023 #ifdef VARIABLE_RICE_BITS
4024                         const unsigned rice_parameter_estimate = rice_parameter-1;
4025                         partition_bits = (1+rice_parameter) * residual_samples;
4026 #else
4027                         partition_bits = 0;
4028 #endif
4029                         partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
4030                         for(i = 0; i < residual_samples; i++) {
4031 #ifdef VARIABLE_RICE_BITS
4032                                 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
4033 #else
4034                                 partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
4035 #endif
4036                         }
4037 #ifndef NO_RICE_SEARCH
4038                         if(partition_bits < best_partition_bits) {
4039                                 best_rice_parameter = rice_parameter;
4040                                 best_partition_bits = partition_bits;
4041                         }
4042                 }
4043 #endif
4044                 parameters[0] = best_rice_parameter;
4045                 bits_ += best_partition_bits;
4046         }
4047         else {
4048                 unsigned partition, residual_sample, save_residual_sample, partition_sample;
4049                 unsigned partition_samples;
4050                 FLAC__uint64 mean, k;
4051                 const unsigned partitions = 1u << partition_order;
4052                 for(partition = residual_sample = 0; partition < partitions; partition++) {
4053                         partition_samples = (residual_samples+predictor_order) >> partition_order;
4054                         if(partition == 0) {
4055                                 if(partition_samples <= predictor_order)
4056                                         return false;
4057                                 else
4058                                         partition_samples -= predictor_order;
4059                         }
4060                         mean = 0;
4061                         save_residual_sample = residual_sample;
4062                         for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++)
4063                                 mean += abs_residual[residual_sample];
4064                         residual_sample = save_residual_sample;
4065                         /* we are basically calculating the size in bits of the
4066                          * average residual magnitude in the partition:
4067                          *   rice_parameter = floor(log2(mean/partition_samples))
4068                          * 'mean' is not a good name for the variable, it is
4069                          * actually the sum of magnitudes of all residual values
4070                          * in the partition, so the actual mean is
4071                          * mean/partition_samples
4072                          */
4073                         for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
4074                                 ;
4075                         if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
4076 #ifdef DEBUG_VERBOSE
4077                                 fprintf(stderr, "clipping rice_parameter (%u -> %u) @3\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
4078 #endif
4079                                 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
4080                         }
4081
4082 #ifndef NO_RICE_SEARCH
4083                         if(rice_parameter_search_dist) {
4084                                 if(rice_parameter < rice_parameter_search_dist)
4085                                         min_rice_parameter = 0;
4086                                 else
4087                                         min_rice_parameter = rice_parameter - rice_parameter_search_dist;
4088                                 max_rice_parameter = rice_parameter + rice_parameter_search_dist;
4089                                 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
4090 #ifdef DEBUG_VERBOSE
4091                                         fprintf(stderr, "clipping rice_parameter (%u -> %u) @4\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
4092 #endif
4093                                         max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
4094                                 }
4095                         }
4096                         else
4097                                 min_rice_parameter = max_rice_parameter = rice_parameter;
4098
4099                         best_partition_bits = 0xffffffff;
4100                         for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
4101 #endif
4102 #ifdef VARIABLE_RICE_BITS
4103                                 const unsigned rice_parameter_estimate = rice_parameter-1;
4104                                 partition_bits = (1+rice_parameter) * partition_samples;
4105 #else
4106                                 partition_bits = 0;
4107 #endif
4108                                 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
4109                                 save_residual_sample = residual_sample;
4110                                 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
4111 #ifdef VARIABLE_RICE_BITS
4112                                         partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
4113 #else
4114                                         partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
4115 #endif
4116                                 }
4117 #ifndef NO_RICE_SEARCH
4118                                 if(rice_parameter != max_rice_parameter)
4119                                         residual_sample = save_residual_sample;
4120                                 if(partition_bits < best_partition_bits) {
4121                                         best_rice_parameter = rice_parameter;
4122                                         best_partition_bits = partition_bits;
4123                                 }
4124                         }
4125 #endif
4126                         parameters[partition] = best_rice_parameter;
4127                         bits_ += best_partition_bits;
4128                 }
4129         }
4130
4131         *bits = bits_;
4132         return true;
4133 }
4134
4135 #ifdef DONT_ESTIMATE_RICE_BITS
4136 FLAC__bool set_partitioned_rice_with_precompute_(
4137         const FLAC__int32 residual[],
4138         const FLAC__uint64 abs_residual_partition_sums[],
4139         const unsigned raw_bits_per_partition[],
4140         const unsigned residual_samples,
4141         const unsigned predictor_order,
4142         const unsigned suggested_rice_parameter,
4143         const unsigned rice_parameter_search_dist,
4144         const unsigned partition_order,
4145         const FLAC__bool search_for_escapes,
4146         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
4147         unsigned *bits
4148 )
4149 #else
4150 FLAC__bool set_partitioned_rice_with_precompute_(
4151         const FLAC__uint32 abs_residual[],
4152         const FLAC__uint64 abs_residual_partition_sums[],
4153         const unsigned raw_bits_per_partition[],
4154         const unsigned residual_samples,
4155         const unsigned predictor_order,
4156         const unsigned suggested_rice_parameter,
4157         const unsigned rice_parameter_search_dist,
4158         const unsigned partition_order,
4159         const FLAC__bool search_for_escapes,
4160         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
4161         unsigned *bits
4162 )
4163 #endif
4164 {
4165         unsigned rice_parameter, partition_bits;
4166 #ifndef NO_RICE_SEARCH
4167         unsigned best_partition_bits;
4168         unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
4169 #endif
4170         unsigned flat_bits;
4171         unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
4172         unsigned *parameters, *raw_bits;
4173
4174         FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
4175
4176         FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order));
4177         parameters = partitioned_rice_contents->parameters;
4178         raw_bits = partitioned_rice_contents->raw_bits;
4179
4180         if(partition_order == 0) {
4181                 unsigned i;
4182
4183 #ifndef NO_RICE_SEARCH
4184                 if(rice_parameter_search_dist) {
4185                         if(suggested_rice_parameter < rice_parameter_search_dist)
4186                                 min_rice_parameter = 0;
4187                         else
4188                                 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
4189                         max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
4190                         if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
4191 #ifdef DEBUG_VERBOSE
4192                                 fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
4193 #endif
4194                                 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
4195                         }
4196                 }
4197                 else
4198                         min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
4199
4200                 best_partition_bits = 0xffffffff;
4201                 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
4202 #endif
4203 #ifdef VARIABLE_RICE_BITS
4204                         const unsigned rice_parameter_estimate = rice_parameter-1;
4205                         partition_bits = (1+rice_parameter) * residual_samples;
4206 #else
4207                         partition_bits = 0;
4208 #endif
4209                         partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
4210                         for(i = 0; i < residual_samples; i++) {
4211 #ifdef VARIABLE_RICE_BITS
4212                                 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
4213 #else
4214                                 partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
4215 #endif
4216                         }
4217 #ifndef NO_RICE_SEARCH
4218                         if(partition_bits < best_partition_bits) {
4219                                 best_rice_parameter = rice_parameter;
4220                                 best_partition_bits = partition_bits;
4221                         }
4222                 }
4223 #endif
4224                 if(search_for_escapes) {
4225                         flat_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[0] * residual_samples;
4226                         if(flat_bits <= best_partition_bits) {
4227                                 raw_bits[0] = raw_bits_per_partition[0];
4228                                 best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
4229                                 best_partition_bits = flat_bits;
4230                         }
4231                 }
4232                 parameters[0] = best_rice_parameter;
4233                 bits_ += best_partition_bits;
4234         }
4235         else {
4236                 unsigned partition, residual_sample, save_residual_sample, partition_sample;
4237                 unsigned partition_samples;
4238                 FLAC__uint64 mean, k;
4239                 const unsigned partitions = 1u << partition_order;
4240                 for(partition = residual_sample = 0; partition < partitions; partition++) {
4241                         partition_samples = (residual_samples+predictor_order) >> partition_order;
4242                         if(partition == 0) {
4243                                 if(partition_samples <= predictor_order)
4244                                         return false;
4245                                 else
4246                                         partition_samples -= predictor_order;
4247                         }
4248                         mean = abs_residual_partition_sums[partition];
4249                         /* we are basically calculating the size in bits of the
4250                          * average residual magnitude in the partition:
4251                          *   rice_parameter = floor(log2(mean/partition_samples))
4252                          * 'mean' is not a good name for the variable, it is
4253                          * actually the sum of magnitudes of all residual values
4254                          * in the partition, so the actual mean is
4255                          * mean/partition_samples
4256                          */
4257                         for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
4258                                 ;
4259                         if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
4260 #ifdef DEBUG_VERBOSE
4261                                 fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
4262 #endif
4263                                 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
4264                         }
4265
4266 #ifndef NO_RICE_SEARCH
4267                         if(rice_parameter_search_dist) {
4268                                 if(rice_parameter < rice_parameter_search_dist)
4269                                         min_rice_parameter = 0;
4270                                 else
4271                                         min_rice_parameter = rice_parameter - rice_parameter_search_dist;
4272                                 max_rice_parameter = rice_parameter + rice_parameter_search_dist;
4273                                 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
4274 #ifdef DEBUG_VERBOSE
4275                                         fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
4276 #endif
4277                                         max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
4278                                 }
4279                         }
4280                         else
4281                                 min_rice_parameter = max_rice_parameter = rice_parameter;
4282
4283                         best_partition_bits = 0xffffffff;
4284                         for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
4285 #endif
4286 #ifdef VARIABLE_RICE_BITS
4287                                 const unsigned rice_parameter_estimate = rice_parameter-1;
4288                                 partition_bits = (1+rice_parameter) * partition_samples;
4289 #else
4290                                 partition_bits = 0;
4291 #endif
4292                                 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
4293                                 save_residual_sample = residual_sample;
4294                                 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
4295 #ifdef VARIABLE_RICE_BITS
4296                                         partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
4297 #else
4298                                         partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
4299 #endif
4300                                 }
4301 #ifndef NO_RICE_SEARCH
4302                                 if(rice_parameter != max_rice_parameter)
4303                                         residual_sample = save_residual_sample;
4304                                 if(partition_bits < best_partition_bits) {
4305                                         best_rice_parameter = rice_parameter;
4306                                         best_partition_bits = partition_bits;
4307                                 }
4308                         }
4309 #endif
4310                         if(search_for_escapes) {
4311                                 flat_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[partition] * partition_samples;
4312                                 if(flat_bits <= best_partition_bits) {
4313                                         raw_bits[partition] = raw_bits_per_partition[partition];
4314                                         best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
4315                                         best_partition_bits = flat_bits;
4316                                 }
4317                         }
4318                         parameters[partition] = best_rice_parameter;
4319                         bits_ += best_partition_bits;
4320                 }
4321         }
4322
4323         *bits = bits_;
4324         return true;
4325 }
4326
4327 unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples)
4328 {
4329         unsigned i, shift;
4330         FLAC__int32 x = 0;
4331
4332         for(i = 0; i < samples && !(x&1); i++)
4333                 x |= signal[i];
4334
4335         if(x == 0) {
4336                 shift = 0;
4337         }
4338         else {
4339                 for(shift = 0; !(x&1); shift++)
4340                         x >>= 1;
4341         }
4342
4343         if(shift > 0) {
4344                 for(i = 0; i < samples; i++)
4345                          signal[i] >>= shift;
4346         }
4347
4348         return shift;
4349 }
4350
4351 void append_to_verify_fifo_(verify_input_fifo *fifo, const FLAC__int32 * const input[], unsigned input_offset, unsigned channels, unsigned wide_samples)
4352 {
4353         unsigned channel;
4354
4355         for(channel = 0; channel < channels; channel++)
4356                 memcpy(&fifo->data[channel][fifo->tail], &input[channel][input_offset], sizeof(FLAC__int32) * wide_samples);
4357
4358         fifo->tail += wide_samples;
4359
4360         FLAC__ASSERT(fifo->tail <= fifo->size);
4361 }
4362
4363 void append_to_verify_fifo_interleaved_(verify_input_fifo *fifo, const FLAC__int32 input[], unsigned input_offset, unsigned channels, unsigned wide_samples)
4364 {
4365         unsigned channel;
4366         unsigned sample, wide_sample;
4367         unsigned tail = fifo->tail;
4368
4369         sample = input_offset * channels;
4370         for(wide_sample = 0; wide_sample < wide_samples; wide_sample++) {
4371                 for(channel = 0; channel < channels; channel++)
4372                         fifo->data[channel][tail] = input[sample++];
4373                 tail++;
4374         }
4375         fifo->tail = tail;
4376
4377         FLAC__ASSERT(fifo->tail <= fifo->size);
4378 }
4379
4380 FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
4381 {
4382         FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data;
4383         const size_t encoded_bytes = encoder->private_->verify.output.bytes;
4384         (void)decoder;
4385
4386         if(encoder->private_->verify.needs_magic_hack) {
4387                 FLAC__ASSERT(*bytes >= FLAC__STREAM_SYNC_LENGTH);
4388                 *bytes = FLAC__STREAM_SYNC_LENGTH;
4389                 memcpy(buffer, FLAC__STREAM_SYNC_STRING, *bytes);
4390                 encoder->private_->verify.needs_magic_hack = false;
4391         }
4392         else {
4393                 if(encoded_bytes == 0) {
4394                         /*
4395                          * If we get here, a FIFO underflow has occurred,
4396                          * which means there is a bug somewhere.
4397                          */
4398                         FLAC__ASSERT(0);
4399                         return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
4400                 }
4401                 else if(encoded_bytes < *bytes)
4402                         *bytes = encoded_bytes;
4403                 memcpy(buffer, encoder->private_->verify.output.data, *bytes);
4404                 encoder->private_->verify.output.data += *bytes;
4405                 encoder->private_->verify.output.bytes -= *bytes;
4406         }
4407
4408         return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
4409 }
4410
4411 FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
4412 {
4413         FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder *)client_data;
4414         unsigned channel;
4415         const unsigned channels = FLAC__stream_decoder_get_channels(decoder);
4416         const unsigned blocksize = frame->header.blocksize;
4417         const unsigned bytes_per_block = sizeof(FLAC__int32) * blocksize;
4418
4419         for(channel = 0; channel < channels; channel++) {
4420                 if(0 != memcmp(buffer[channel], encoder->private_->verify.input_fifo.data[channel], bytes_per_block)) {
4421                         unsigned i, sample = 0;
4422                         FLAC__int32 expect = 0, got = 0;
4423
4424                         for(i = 0; i < blocksize; i++) {
4425                                 if(buffer[channel][i] != encoder->private_->verify.input_fifo.data[channel][i]) {
4426                                         sample = i;
4427                                         expect = (FLAC__int32)encoder->private_->verify.input_fifo.data[channel][i];
4428                                         got = (FLAC__int32)buffer[channel][i];
4429                                         break;
4430                                 }
4431                         }
4432                         FLAC__ASSERT(i < blocksize);
4433                         FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
4434                         encoder->private_->verify.error_stats.absolute_sample = frame->header.number.sample_number + sample;
4435                         encoder->private_->verify.error_stats.frame_number = (unsigned)(frame->header.number.sample_number / blocksize);
4436                         encoder->private_->verify.error_stats.channel = channel;
4437                         encoder->private_->verify.error_stats.sample = sample;
4438                         encoder->private_->verify.error_stats.expected = expect;
4439                         encoder->private_->verify.error_stats.got = got;
4440                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA;
4441                         return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
4442                 }
4443         }
4444         /* dequeue the frame from the fifo */
4445         encoder->private_->verify.input_fifo.tail -= blocksize;
4446         for(channel = 0; channel < channels; channel++)
4447                 memmove(&encoder->private_->verify.input_fifo.data[channel][0], &encoder->private_->verify.input_fifo.data[channel][blocksize], encoder->private_->verify.input_fifo.tail * sizeof(encoder->private_->verify.input_fifo.data[0][0]));
4448         return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
4449 }
4450
4451 void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
4452 {
4453         (void)decoder, (void)metadata, (void)client_data;
4454 }
4455
4456 void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
4457 {
4458         FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data;
4459         (void)decoder, (void)status;
4460         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
4461 }
4462
4463 FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
4464 {
4465         (void)client_data;
4466
4467         *bytes = fread(buffer, 1, *bytes, encoder->private_->file);
4468         if (*bytes == 0) {
4469                 if (feof(encoder->private_->file))
4470                         return FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM;
4471                 else if (ferror(encoder->private_->file))
4472                         return FLAC__STREAM_ENCODER_READ_STATUS_ABORT;
4473         }
4474         return FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE;
4475 }
4476
4477 FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data)
4478 {
4479         (void)client_data;
4480
4481         if(fseeko(encoder->private_->file, (off_t)absolute_byte_offset, SEEK_SET) < 0)
4482                 return FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR;
4483         else
4484                 return FLAC__STREAM_ENCODER_SEEK_STATUS_OK;
4485 }
4486
4487 FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
4488 {
4489         off_t offset;
4490
4491         (void)client_data;
4492
4493         offset = ftello(encoder->private_->file);
4494
4495         if(offset < 0) {
4496                 return FLAC__STREAM_ENCODER_TELL_STATUS_ERROR;
4497         }
4498         else {
4499                 *absolute_byte_offset = (FLAC__uint64)offset;
4500                 return FLAC__STREAM_ENCODER_TELL_STATUS_OK;
4501         }
4502 }
4503
4504 #ifdef FLAC__VALGRIND_TESTING
4505 static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
4506 {
4507         size_t ret = fwrite(ptr, size, nmemb, stream);
4508         if(!ferror(stream))
4509                 fflush(stream);
4510         return ret;
4511 }
4512 #else
4513 #define local__fwrite fwrite
4514 #endif
4515
4516 FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data)
4517 {
4518         (void)client_data, (void)current_frame;
4519
4520         if(local__fwrite(buffer, sizeof(FLAC__byte), bytes, encoder->private_->file) == bytes) {
4521                 FLAC__bool call_it = 0 != encoder->private_->progress_callback && (
4522 #if FLAC__HAS_OGG
4523                         /* We would like to be able to use 'samples > 0' in the
4524                          * clause here but currently because of the nature of our
4525                          * Ogg writing implementation, 'samples' is always 0 (see
4526                          * ogg_encoder_aspect.c).  The downside is extra progress
4527                          * callbacks.
4528                          */
4529                         encoder->private_->is_ogg? true :
4530 #endif
4531                         samples > 0
4532                 );
4533                 if(call_it) {
4534                         /* NOTE: We have to add +bytes, +samples, and +1 to the stats
4535                          * because at this point in the callback chain, the stats
4536                          * have not been updated.  Only after we return and control
4537                          * gets back to write_frame_() are the stats updated
4538                          */
4539                         encoder->private_->progress_callback(encoder, encoder->private_->bytes_written+bytes, encoder->private_->samples_written+samples, encoder->private_->frames_written+(samples?1:0), encoder->private_->total_frames_estimate, encoder->private_->client_data);
4540                 }
4541                 return FLAC__STREAM_ENCODER_WRITE_STATUS_OK;
4542         }
4543         else
4544                 return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
4545 }
4546
4547 /*
4548  * This will forcibly set stdout to binary mode (for OSes that require it)
4549  */
4550 FILE *get_binary_stdout_()
4551 {
4552         /* if something breaks here it is probably due to the presence or
4553          * absence of an underscore before the identifiers 'setmode',
4554          * 'fileno', and/or 'O_BINARY'; check your system header files.
4555          */
4556 #if defined _MSC_VER || defined __MINGW32__
4557         _setmode(_fileno(stdout), _O_BINARY);
4558 #elif defined __CYGWIN__
4559         /* almost certainly not needed for any modern Cygwin, but let's be safe... */
4560         setmode(_fileno(stdout), _O_BINARY);
4561 #elif defined __EMX__
4562         setmode(fileno(stdout), O_BINARY);
4563 #endif
4564
4565         return stdout;
4566 }