1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000,2001,2002 Josh Coalson
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
22 #include <stdlib.h> /* for malloc() */
23 #include <string.h> /* for memcpy() */
24 #include "FLAC/assert.h"
25 #include "FLAC/stream_decoder.h"
26 #include "protected/stream_encoder.h"
27 #include "private/bitbuffer.h"
28 #include "private/bitmath.h"
29 #include "private/crc.h"
30 #include "private/cpu.h"
31 #include "private/fixed.h"
32 #include "private/format.h"
33 #include "private/lpc.h"
34 #include "private/md5.h"
35 #include "private/memory.h"
36 #include "private/stream_encoder_framing.h"
41 #define min(x,y) ((x)<(y)?(x):(y))
46 #define max(x,y) ((x)>(y)?(x):(y))
49 FLAC__int32 *data[FLAC__MAX_CHANNELS];
50 unsigned size; /* of each data[] in samples */
55 const FLAC__byte *data;
62 ENCODER_IN_METADATA = 1,
66 /***********************************************************************
68 * Private class method prototypes
70 ***********************************************************************/
72 static void set_defaults_(FLAC__StreamEncoder *encoder);
73 static void free_(FLAC__StreamEncoder *encoder);
74 static FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size);
75 static FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples);
76 static FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame);
77 static FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame);
79 static FLAC__bool process_subframe_(
80 FLAC__StreamEncoder *encoder,
81 unsigned min_partition_order,
82 unsigned max_partition_order,
83 FLAC__bool precompute_partition_sums,
84 const FLAC__FrameHeader *frame_header,
85 unsigned subframe_bps,
86 const FLAC__int32 integer_signal[],
87 const FLAC__real real_signal[],
88 FLAC__Subframe *subframe[2],
89 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
90 FLAC__int32 *residual[2],
91 unsigned *best_subframe,
95 static FLAC__bool add_subframe_(
96 FLAC__StreamEncoder *encoder,
97 const FLAC__FrameHeader *frame_header,
98 unsigned subframe_bps,
99 const FLAC__Subframe *subframe,
100 FLAC__BitBuffer *frame
103 static unsigned evaluate_constant_subframe_(
104 const FLAC__int32 signal,
105 unsigned subframe_bps,
106 FLAC__Subframe *subframe
109 static unsigned evaluate_fixed_subframe_(
110 FLAC__StreamEncoder *encoder,
111 const FLAC__int32 signal[],
112 FLAC__int32 residual[],
113 FLAC__uint32 abs_residual[],
114 FLAC__uint64 abs_residual_partition_sums[],
115 unsigned raw_bits_per_partition[],
117 unsigned subframe_bps,
119 unsigned rice_parameter,
120 unsigned min_partition_order,
121 unsigned max_partition_order,
122 FLAC__bool precompute_partition_sums,
123 FLAC__bool do_escape_coding,
124 unsigned rice_parameter_search_dist,
125 FLAC__Subframe *subframe,
126 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
129 static unsigned evaluate_lpc_subframe_(
130 FLAC__StreamEncoder *encoder,
131 const FLAC__int32 signal[],
132 FLAC__int32 residual[],
133 FLAC__uint32 abs_residual[],
134 FLAC__uint64 abs_residual_partition_sums[],
135 unsigned raw_bits_per_partition[],
136 const FLAC__real lp_coeff[],
138 unsigned subframe_bps,
140 unsigned qlp_coeff_precision,
141 unsigned rice_parameter,
142 unsigned min_partition_order,
143 unsigned max_partition_order,
144 FLAC__bool precompute_partition_sums,
145 FLAC__bool do_escape_coding,
146 unsigned rice_parameter_search_dist,
147 FLAC__Subframe *subframe,
148 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
151 static unsigned evaluate_verbatim_subframe_(
152 const FLAC__int32 signal[],
154 unsigned subframe_bps,
155 FLAC__Subframe *subframe
158 static unsigned find_best_partition_order_(
159 struct FLAC__StreamEncoderPrivate *private_,
160 const FLAC__int32 residual[],
161 FLAC__uint32 abs_residual[],
162 FLAC__uint64 abs_residual_partition_sums[],
163 unsigned raw_bits_per_partition[],
164 unsigned residual_samples,
165 unsigned predictor_order,
166 unsigned rice_parameter,
167 unsigned min_partition_order,
168 unsigned max_partition_order,
169 FLAC__bool precompute_partition_sums,
170 FLAC__bool do_escape_coding,
171 unsigned rice_parameter_search_dist,
172 FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice
175 static void precompute_partition_info_sums_(
176 const FLAC__uint32 abs_residual[],
177 FLAC__uint64 abs_residual_partition_sums[],
178 unsigned residual_samples,
179 unsigned predictor_order,
180 unsigned min_partition_order,
181 unsigned max_partition_order
184 static void precompute_partition_info_escapes_(
185 const FLAC__int32 residual[],
186 unsigned raw_bits_per_partition[],
187 unsigned residual_samples,
188 unsigned predictor_order,
189 unsigned min_partition_order,
190 unsigned max_partition_order
193 #ifdef DONT_ESTIMATE_RICE_BITS
194 static FLAC__bool set_partitioned_rice_(
195 const FLAC__uint32 abs_residual[],
196 const FLAC__int32 residual[],
197 const unsigned residual_samples,
198 const unsigned predictor_order,
199 const unsigned suggested_rice_parameter,
200 const unsigned rice_parameter_search_dist,
201 const unsigned partition_order,
202 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
206 static FLAC__bool set_partitioned_rice_with_precompute_(
207 const FLAC__int32 residual[],
208 const FLAC__uint64 abs_residual_partition_sums[],
209 const unsigned raw_bits_per_partition[],
210 const unsigned residual_samples,
211 const unsigned predictor_order,
212 const unsigned suggested_rice_parameter,
213 const unsigned rice_parameter_search_dist,
214 const unsigned partition_order,
215 const FLAC__bool search_for_escapes,
216 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
220 static FLAC__bool set_partitioned_rice_(
221 const FLAC__uint32 abs_residual[],
222 const unsigned residual_samples,
223 const unsigned predictor_order,
224 const unsigned suggested_rice_parameter,
225 const unsigned rice_parameter_search_dist,
226 const unsigned partition_order,
227 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
231 static FLAC__bool set_partitioned_rice_with_precompute_(
232 const FLAC__uint32 abs_residual[],
233 const FLAC__uint64 abs_residual_partition_sums[],
234 const unsigned raw_bits_per_partition[],
235 const unsigned residual_samples,
236 const unsigned predictor_order,
237 const unsigned suggested_rice_parameter,
238 const unsigned rice_parameter_search_dist,
239 const unsigned partition_order,
240 const FLAC__bool search_for_escapes,
241 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
246 static unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples);
248 /* verify-related routines: */
249 static void append_to_verify_fifo_(
250 verify_input_fifo *fifo,
251 const FLAC__int32 * const input[],
252 unsigned input_offset,
254 unsigned wide_samples
257 static void append_to_verify_fifo_interleaved_(
258 verify_input_fifo *fifo,
259 const FLAC__int32 input[],
260 unsigned input_offset,
262 unsigned wide_samples
265 static FLAC__StreamDecoderReadStatus verify_read_callback_(
266 const FLAC__StreamDecoder *decoder,
272 static FLAC__StreamDecoderWriteStatus verify_write_callback_(
273 const FLAC__StreamDecoder *decoder,
274 const FLAC__Frame *frame,
275 const FLAC__int32 * const buffer[],
279 static void verify_metadata_callback_(
280 const FLAC__StreamDecoder *decoder,
281 const FLAC__StreamMetadata *metadata,
285 static void verify_error_callback_(
286 const FLAC__StreamDecoder *decoder,
287 FLAC__StreamDecoderErrorStatus status,
292 /***********************************************************************
296 ***********************************************************************/
298 typedef struct FLAC__StreamEncoderPrivate {
299 unsigned input_capacity; /* current size (in samples) of the signal and residual buffers */
300 FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS]; /* the integer version of the input signal */
301 FLAC__int32 *integer_signal_mid_side[2]; /* the integer version of the mid-side input signal (stereo only) */
302 FLAC__real *real_signal[FLAC__MAX_CHANNELS]; /* the floating-point version of the input signal */
303 FLAC__real *real_signal_mid_side[2]; /* the floating-point version of the mid-side input signal (stereo only) */
304 unsigned subframe_bps[FLAC__MAX_CHANNELS]; /* the effective bits per sample of the input signal (stream bps - wasted bits) */
305 unsigned subframe_bps_mid_side[2]; /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */
306 FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */
307 FLAC__int32 *residual_workspace_mid_side[2][2];
308 FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2];
309 FLAC__Subframe subframe_workspace_mid_side[2][2];
310 FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2];
311 FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2];
312 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace[FLAC__MAX_CHANNELS][2];
313 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace_mid_side[FLAC__MAX_CHANNELS][2];
314 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr[FLAC__MAX_CHANNELS][2];
315 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr_mid_side[FLAC__MAX_CHANNELS][2];
316 unsigned best_subframe[FLAC__MAX_CHANNELS]; /* index into the above workspaces */
317 unsigned best_subframe_mid_side[2];
318 unsigned best_subframe_bits[FLAC__MAX_CHANNELS]; /* size in bits of the best subframe for each channel */
319 unsigned best_subframe_bits_mid_side[2];
320 FLAC__uint32 *abs_residual; /* workspace where abs(candidate residual) is stored */
321 FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */
322 unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */
323 FLAC__BitBuffer *frame; /* the current frame being worked on */
324 double loose_mid_side_stereo_frames_exact; /* exact number of frames the encoder will use before trying both independent and mid/side frames again */
325 unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
326 unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */
327 FLAC__ChannelAssignment last_channel_assignment;
328 FLAC__StreamMetadata metadata;
329 unsigned current_sample_number;
330 unsigned current_frame_number;
331 struct MD5Context md5context;
332 FLAC__CPUInfo cpuinfo;
333 unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__real residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
334 void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
335 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[]);
336 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[]);
337 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[]);
338 FLAC__bool use_wide_by_block; /* use slow 64-bit versions of some functions because of the block size */
339 FLAC__bool use_wide_by_partition; /* use slow 64-bit versions of some functions because of the min partition order and blocksize */
340 FLAC__bool use_wide_by_order; /* use slow 64-bit versions of some functions because of the lpc order */
341 FLAC__bool precompute_partition_sums; /* our initial guess as to whether precomputing the partitions sums will be a speed improvement */
342 FLAC__bool disable_constant_subframes;
343 FLAC__bool disable_fixed_subframes;
344 FLAC__bool disable_verbatim_subframes;
345 FLAC__StreamEncoderWriteCallback write_callback;
346 FLAC__StreamEncoderMetadataCallback metadata_callback;
348 /* unaligned (original) pointers to allocated data */
349 FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS];
350 FLAC__int32 *integer_signal_mid_side_unaligned[2];
351 FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS];
352 FLAC__real *real_signal_mid_side_unaligned[2];
353 FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2];
354 FLAC__int32 *residual_workspace_mid_side_unaligned[2][2];
355 FLAC__uint32 *abs_residual_unaligned;
356 FLAC__uint64 *abs_residual_partition_sums_unaligned;
357 unsigned *raw_bits_per_partition_unaligned;
359 * These fields have been moved here from private function local
360 * declarations merely to save stack space during encoding.
362 FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from process_subframe_() */
363 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_extra[2]; /* from find_best_partition_order_() */
365 * The data for the verify section
368 FLAC__StreamDecoder *decoder;
369 EncoderStateHint state_hint;
370 FLAC__bool needs_magic_hack;
371 verify_input_fifo input_fifo;
372 verify_output output;
374 FLAC__uint64 absolute_sample;
375 unsigned frame_number;
378 FLAC__int32 expected;
382 FLAC__bool is_being_deleted; /* if true, call to ..._finish() from ..._delete() will not call the callbacks */
383 } FLAC__StreamEncoderPrivate;
385 /***********************************************************************
387 * Public static class data
389 ***********************************************************************/
391 const char * const FLAC__StreamEncoderStateString[] = {
392 "FLAC__STREAM_ENCODER_OK",
393 "FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR",
394 "FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA",
395 "FLAC__STREAM_ENCODER_INVALID_CALLBACK",
396 "FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS",
397 "FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE",
398 "FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE",
399 "FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE",
400 "FLAC__STREAM_ENCODER_INVALID_MAX_LPC_ORDER",
401 "FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION",
402 "FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH",
403 "FLAC__STREAM_ENCODER_MID_SIDE_SAMPLE_SIZE_MISMATCH",
404 "FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE",
405 "FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER",
406 "FLAC__STREAM_ENCODER_NOT_STREAMABLE",
407 "FLAC__STREAM_ENCODER_FRAMING_ERROR",
408 "FLAC__STREAM_ENCODER_INVALID_METADATA",
409 "FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING",
410 "FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING",
411 "FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR",
412 "FLAC__STREAM_ENCODER_ALREADY_INITIALIZED",
413 "FLAC__STREAM_ENCODER_UNINITIALIZED"
416 const char * const FLAC__StreamEncoderWriteStatusString[] = {
417 "FLAC__STREAM_ENCODER_WRITE_STATUS_OK",
418 "FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR"
421 /***********************************************************************
423 * Class constructor/destructor
426 FLAC__StreamEncoder *FLAC__stream_encoder_new()
428 FLAC__StreamEncoder *encoder;
431 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
433 encoder = (FLAC__StreamEncoder*)malloc(sizeof(FLAC__StreamEncoder));
437 memset(encoder, 0, sizeof(FLAC__StreamEncoder));
439 encoder->protected_ = (FLAC__StreamEncoderProtected*)malloc(sizeof(FLAC__StreamEncoderProtected));
440 if(encoder->protected_ == 0) {
444 memset(encoder->protected_, 0, sizeof(FLAC__StreamEncoderProtected));
446 encoder->private_ = (FLAC__StreamEncoderPrivate*)malloc(sizeof(FLAC__StreamEncoderPrivate));
447 if(encoder->private_ == 0) {
448 free(encoder->protected_);
452 memset(encoder->private_, 0, sizeof(FLAC__StreamEncoderPrivate));
454 encoder->private_->frame = FLAC__bitbuffer_new();
455 if(encoder->private_->frame == 0) {
456 free(encoder->private_);
457 free(encoder->protected_);
462 set_defaults_(encoder);
464 encoder->private_->is_being_deleted = false;
466 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
467 encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0];
468 encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1];
470 for(i = 0; i < 2; i++) {
471 encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0];
472 encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1];
474 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
475 encoder->private_->partitioned_rice_contents_workspace_ptr[i][0] = &encoder->private_->partitioned_rice_contents_workspace[i][0];
476 encoder->private_->partitioned_rice_contents_workspace_ptr[i][1] = &encoder->private_->partitioned_rice_contents_workspace[i][1];
478 for(i = 0; i < 2; i++) {
479 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][0] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0];
480 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][1] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1];
483 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
484 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
485 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
487 for(i = 0; i < 2; i++) {
488 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
489 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
491 for(i = 0; i < 2; i++)
492 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_extra[i]);
494 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
499 void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
503 FLAC__ASSERT(0 != encoder);
504 FLAC__ASSERT(0 != encoder->protected_);
505 FLAC__ASSERT(0 != encoder->private_);
506 FLAC__ASSERT(0 != encoder->private_->frame);
508 encoder->private_->is_being_deleted = true;
510 FLAC__stream_encoder_finish(encoder);
512 if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder)
513 FLAC__stream_decoder_delete(encoder->private_->verify.decoder);
515 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
516 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
517 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
519 for(i = 0; i < 2; i++) {
520 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
521 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
523 for(i = 0; i < 2; i++)
524 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_extra[i]);
526 FLAC__bitbuffer_delete(encoder->private_->frame);
527 free(encoder->private_);
528 free(encoder->protected_);
532 /***********************************************************************
534 * Public class methods
536 ***********************************************************************/
538 FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
541 FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment;
543 FLAC__ASSERT(0 != encoder);
545 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
546 return encoder->protected_->state = FLAC__STREAM_ENCODER_ALREADY_INITIALIZED;
548 encoder->protected_->state = FLAC__STREAM_ENCODER_OK;
550 if(0 == encoder->private_->write_callback || 0 == encoder->private_->metadata_callback)
551 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_CALLBACK;
553 if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS)
554 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS;
556 if(encoder->protected_->do_mid_side_stereo && encoder->protected_->channels != 2)
557 return encoder->protected_->state = FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH;
559 if(encoder->protected_->loose_mid_side_stereo && !encoder->protected_->do_mid_side_stereo)
560 return encoder->protected_->state = FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE;
562 if(encoder->protected_->bits_per_sample >= 32)
563 encoder->protected_->do_mid_side_stereo = false; /* since we do 32-bit math, the side channel would have 33 bps and overflow */
565 if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE)
566 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE;
568 if(!FLAC__format_sample_rate_is_valid(encoder->protected_->sample_rate))
569 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE;
571 if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE)
572 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE;
574 if(encoder->protected_->max_lpc_order > FLAC__MAX_LPC_ORDER)
575 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_MAX_LPC_ORDER;
577 if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order)
578 return encoder->protected_->state = FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER;
580 if(encoder->protected_->qlp_coeff_precision == 0) {
581 if(encoder->protected_->bits_per_sample < 16) {
582 /* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */
583 /* @@@ until then we'll make a guess */
584 encoder->protected_->qlp_coeff_precision = max(FLAC__MIN_QLP_COEFF_PRECISION, 2 + encoder->protected_->bits_per_sample / 2);
586 else if(encoder->protected_->bits_per_sample == 16) {
587 if(encoder->protected_->blocksize <= 192)
588 encoder->protected_->qlp_coeff_precision = 7;
589 else if(encoder->protected_->blocksize <= 384)
590 encoder->protected_->qlp_coeff_precision = 8;
591 else if(encoder->protected_->blocksize <= 576)
592 encoder->protected_->qlp_coeff_precision = 9;
593 else if(encoder->protected_->blocksize <= 1152)
594 encoder->protected_->qlp_coeff_precision = 10;
595 else if(encoder->protected_->blocksize <= 2304)
596 encoder->protected_->qlp_coeff_precision = 11;
597 else if(encoder->protected_->blocksize <= 4608)
598 encoder->protected_->qlp_coeff_precision = 12;
600 encoder->protected_->qlp_coeff_precision = 13;
603 if(encoder->protected_->blocksize <= 384)
604 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-2;
605 else if(encoder->protected_->blocksize <= 1152)
606 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-1;
608 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
610 FLAC__ASSERT(encoder->protected_->qlp_coeff_precision <= FLAC__MAX_QLP_COEFF_PRECISION);
612 else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision > FLAC__MAX_QLP_COEFF_PRECISION)
613 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION;
615 if(encoder->protected_->streamable_subset) {
617 encoder->protected_->blocksize != 192 &&
618 encoder->protected_->blocksize != 576 &&
619 encoder->protected_->blocksize != 1152 &&
620 encoder->protected_->blocksize != 2304 &&
621 encoder->protected_->blocksize != 4608 &&
622 encoder->protected_->blocksize != 256 &&
623 encoder->protected_->blocksize != 512 &&
624 encoder->protected_->blocksize != 1024 &&
625 encoder->protected_->blocksize != 2048 &&
626 encoder->protected_->blocksize != 4096 &&
627 encoder->protected_->blocksize != 8192 &&
628 encoder->protected_->blocksize != 16384
630 return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
632 encoder->protected_->sample_rate != 8000 &&
633 encoder->protected_->sample_rate != 16000 &&
634 encoder->protected_->sample_rate != 22050 &&
635 encoder->protected_->sample_rate != 24000 &&
636 encoder->protected_->sample_rate != 32000 &&
637 encoder->protected_->sample_rate != 44100 &&
638 encoder->protected_->sample_rate != 48000 &&
639 encoder->protected_->sample_rate != 96000
641 return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
643 encoder->protected_->bits_per_sample != 8 &&
644 encoder->protected_->bits_per_sample != 12 &&
645 encoder->protected_->bits_per_sample != 16 &&
646 encoder->protected_->bits_per_sample != 20 &&
647 encoder->protected_->bits_per_sample != 24
649 return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
650 if(encoder->protected_->max_residual_partition_order > FLAC__SUBSET_MAX_RICE_PARTITION_ORDER)
651 return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
654 if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
655 encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1;
656 if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order)
657 encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order;
659 /* validate metadata */
660 if(0 == encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0)
661 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA;
662 metadata_has_seektable = false;
663 metadata_has_vorbis_comment = false;
664 for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
665 if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_STREAMINFO)
666 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA;
667 else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_SEEKTABLE) {
668 if(metadata_has_seektable) /* only one is allowed */
669 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA;
670 metadata_has_seektable = true;
671 if(!FLAC__format_seektable_is_legal(&encoder->protected_->metadata[i]->data.seek_table))
672 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA;
674 else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
675 if(metadata_has_vorbis_comment) /* only one is allowed */
676 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA;
677 metadata_has_vorbis_comment = true;
681 encoder->private_->input_capacity = 0;
682 for(i = 0; i < encoder->protected_->channels; i++) {
683 encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0;
684 encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0;
686 for(i = 0; i < 2; i++) {
687 encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0;
688 encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0;
690 for(i = 0; i < encoder->protected_->channels; i++) {
691 encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0;
692 encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0;
693 encoder->private_->best_subframe[i] = 0;
695 for(i = 0; i < 2; i++) {
696 encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0;
697 encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0;
698 encoder->private_->best_subframe_mid_side[i] = 0;
700 encoder->private_->abs_residual_unaligned = encoder->private_->abs_residual = 0;
701 encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0;
702 encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0;
703 encoder->private_->loose_mid_side_stereo_frames_exact = (double)encoder->protected_->sample_rate * 0.4 / (double)encoder->protected_->blocksize;
704 encoder->private_->loose_mid_side_stereo_frames = (unsigned)(encoder->private_->loose_mid_side_stereo_frames_exact + 0.5);
705 if(encoder->private_->loose_mid_side_stereo_frames == 0)
706 encoder->private_->loose_mid_side_stereo_frames = 1;
707 encoder->private_->loose_mid_side_stereo_frame_count = 0;
708 encoder->private_->current_sample_number = 0;
709 encoder->private_->current_frame_number = 0;
711 encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30);
712 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? */
713 encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */
716 * get the CPU info and set the function pointers
718 FLAC__cpu_info(&encoder->private_->cpuinfo);
719 /* first default to the non-asm routines */
720 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation;
721 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor;
722 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients;
723 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide;
724 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients;
725 /* now override with asm where appropriate */
727 if(encoder->private_->cpuinfo.use_asm) {
728 #ifdef FLAC__CPU_IA32
729 FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
730 #ifdef FLAC__HAS_NASM
731 if(0 && encoder->private_->cpuinfo.data.ia32.sse) {
732 if(encoder->protected_->max_lpc_order < 4)
733 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
734 else if(encoder->protected_->max_lpc_order < 8)
735 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8;
736 else if(encoder->protected_->max_lpc_order < 12)
737 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12;
739 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
741 else if(encoder->private_->cpuinfo.data.ia32._3dnow)
742 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
744 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
745 if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov)
746 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov;
747 if(encoder->private_->cpuinfo.data.ia32.mmx) {
748 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
749 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx;
752 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
753 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
759 /* finally override based on wide-ness if necessary */
760 if(encoder->private_->use_wide_by_block) {
761 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide;
764 /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
765 encoder->private_->precompute_partition_sums = (encoder->protected_->max_residual_partition_order > encoder->protected_->min_residual_partition_order) || encoder->protected_->do_escape_coding;
767 if(!resize_buffers_(encoder, encoder->protected_->blocksize)) {
768 /* the above function sets the state for us in case of an error */
769 return encoder->protected_->state;
772 if(!FLAC__bitbuffer_init(encoder->private_->frame))
773 return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
776 * Set up the verify stuff if necessary
778 if(encoder->protected_->verify) {
780 * First, set up the fifo which will hold the
781 * original signal to compare against
783 encoder->private_->verify.input_fifo.size = encoder->protected_->blocksize;
784 for(i = 0; i < encoder->protected_->channels; i++) {
785 if(0 == (encoder->private_->verify.input_fifo.data[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder->private_->verify.input_fifo.size)))
786 return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
788 encoder->private_->verify.input_fifo.tail = 0;
791 * Now set up a stream decoder for verification
793 encoder->private_->verify.decoder = FLAC__stream_decoder_new();
794 if(0 == encoder->private_->verify.decoder)
795 return encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
797 FLAC__stream_decoder_set_read_callback(encoder->private_->verify.decoder, verify_read_callback_);
798 FLAC__stream_decoder_set_write_callback(encoder->private_->verify.decoder, verify_write_callback_);
799 FLAC__stream_decoder_set_metadata_callback(encoder->private_->verify.decoder, verify_metadata_callback_);
800 FLAC__stream_decoder_set_error_callback(encoder->private_->verify.decoder, verify_error_callback_);
801 FLAC__stream_decoder_set_client_data(encoder->private_->verify.decoder, encoder);
802 if(FLAC__stream_decoder_init(encoder->private_->verify.decoder) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA)
803 return encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
805 encoder->private_->verify.error_stats.absolute_sample = 0;
806 encoder->private_->verify.error_stats.frame_number = 0;
807 encoder->private_->verify.error_stats.channel = 0;
808 encoder->private_->verify.error_stats.sample = 0;
809 encoder->private_->verify.error_stats.expected = 0;
810 encoder->private_->verify.error_stats.got = 0;
813 * write the stream header
815 if(encoder->protected_->verify)
816 encoder->private_->verify.state_hint = ENCODER_IN_MAGIC;
817 if(!FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN))
818 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
819 if(!write_bitbuffer_(encoder, 0)) {
820 /* the above function sets the state for us in case of an error */
821 return encoder->protected_->state;
825 * write the STREAMINFO metadata block
827 if(encoder->protected_->verify)
828 encoder->private_->verify.state_hint = ENCODER_IN_METADATA;
829 encoder->private_->metadata.type = FLAC__METADATA_TYPE_STREAMINFO;
830 encoder->private_->metadata.is_last = false; /* we will have at a minimum a VORBIS_COMMENT afterwards */
831 encoder->private_->metadata.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
832 encoder->private_->metadata.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */
833 encoder->private_->metadata.data.stream_info.max_blocksize = encoder->protected_->blocksize;
834 encoder->private_->metadata.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */
835 encoder->private_->metadata.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */
836 encoder->private_->metadata.data.stream_info.sample_rate = encoder->protected_->sample_rate;
837 encoder->private_->metadata.data.stream_info.channels = encoder->protected_->channels;
838 encoder->private_->metadata.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample;
839 encoder->private_->metadata.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
840 memset(encoder->private_->metadata.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
841 MD5Init(&encoder->private_->md5context);
842 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
843 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
846 if(!FLAC__add_metadata_block(&encoder->private_->metadata, encoder->private_->frame))
847 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
848 if(!write_bitbuffer_(encoder, 0)) {
849 /* the above function sets the state for us in case of an error */
850 return encoder->protected_->state;
854 * Now that the STREAMINFO block is written, we can init this to an
855 * absurdly-high value...
857 encoder->private_->metadata.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
858 /* ... and clear this to 0 */
859 encoder->private_->metadata.data.stream_info.total_samples = 0;
862 * Check to see if the supplied metadata contains a VORBIS_COMMENT;
863 * if not, we will write an empty one (FLAC__add_metadata_block()
864 * automatically supplies the vendor string).
866 if(!metadata_has_vorbis_comment) {
867 FLAC__StreamMetadata vorbis_comment;
868 vorbis_comment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
869 vorbis_comment.is_last = (encoder->protected_->num_metadata_blocks == 0);
870 vorbis_comment.length = 4 + 4; /* MAGIC NUMBER */
871 vorbis_comment.data.vorbis_comment.vendor_string.length = 0;
872 vorbis_comment.data.vorbis_comment.vendor_string.entry = 0;
873 vorbis_comment.data.vorbis_comment.num_comments = 0;
874 vorbis_comment.data.vorbis_comment.comments = 0;
875 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
876 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
879 if(!FLAC__add_metadata_block(&vorbis_comment, encoder->private_->frame))
880 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
881 if(!write_bitbuffer_(encoder, 0)) {
882 /* the above function sets the state for us in case of an error */
883 return encoder->protected_->state;
888 * write the user's metadata blocks
890 for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
891 encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1);
892 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
893 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
896 if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame))
897 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
898 if(!write_bitbuffer_(encoder, 0)) {
899 /* the above function sets the state for us in case of an error */
900 return encoder->protected_->state;
904 if(encoder->protected_->verify)
905 encoder->private_->verify.state_hint = ENCODER_IN_AUDIO;
907 return encoder->protected_->state;
910 void FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
912 FLAC__ASSERT(0 != encoder);
914 if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
917 if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
918 if(encoder->private_->current_sample_number != 0) {
919 encoder->protected_->blocksize = encoder->private_->current_sample_number;
920 process_frame_(encoder, true); /* true => is last frame */
924 MD5Final(encoder->private_->metadata.data.stream_info.md5sum, &encoder->private_->md5context);
926 if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
927 encoder->private_->metadata_callback(encoder, &encoder->private_->metadata, encoder->private_->client_data);
930 if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder)
931 FLAC__stream_decoder_finish(encoder->private_->verify.decoder);
934 set_defaults_(encoder);
936 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
939 FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value)
941 FLAC__ASSERT(0 != encoder);
942 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
944 encoder->protected_->verify = value;
948 FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value)
950 FLAC__ASSERT(0 != encoder);
951 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
953 encoder->protected_->streamable_subset = value;
957 FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
959 FLAC__ASSERT(0 != encoder);
960 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
962 encoder->protected_->do_mid_side_stereo = value;
966 FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
968 FLAC__ASSERT(0 != encoder);
969 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
971 encoder->protected_->loose_mid_side_stereo = value;
975 FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value)
977 FLAC__ASSERT(0 != encoder);
978 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
980 encoder->protected_->channels = value;
984 FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value)
986 FLAC__ASSERT(0 != encoder);
987 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
989 encoder->protected_->bits_per_sample = value;
993 FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value)
995 FLAC__ASSERT(0 != encoder);
996 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
998 encoder->protected_->sample_rate = value;
1002 FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value)
1004 FLAC__ASSERT(0 != encoder);
1005 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1007 encoder->protected_->blocksize = value;
1011 FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value)
1013 FLAC__ASSERT(0 != encoder);
1014 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1016 encoder->protected_->max_lpc_order = value;
1020 FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value)
1022 FLAC__ASSERT(0 != encoder);
1023 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1025 encoder->protected_->qlp_coeff_precision = value;
1029 FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
1031 FLAC__ASSERT(0 != encoder);
1032 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1034 encoder->protected_->do_qlp_coeff_prec_search = value;
1038 FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value)
1040 FLAC__ASSERT(0 != encoder);
1041 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1044 /*@@@ deprecated: */
1045 encoder->protected_->do_escape_coding = value;
1052 FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
1054 FLAC__ASSERT(0 != encoder);
1055 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1057 encoder->protected_->do_exhaustive_model_search = value;
1061 FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
1063 FLAC__ASSERT(0 != encoder);
1064 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1066 encoder->protected_->min_residual_partition_order = value;
1070 FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
1072 FLAC__ASSERT(0 != encoder);
1073 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1075 encoder->protected_->max_residual_partition_order = value;
1079 FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value)
1081 FLAC__ASSERT(0 != encoder);
1082 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1085 /*@@@ deprecated: */
1086 encoder->protected_->rice_parameter_search_dist = value;
1093 FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value)
1095 FLAC__ASSERT(0 != encoder);
1096 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1098 encoder->protected_->total_samples_estimate = value;
1102 FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks)
1104 FLAC__ASSERT(0 != encoder);
1105 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1107 encoder->protected_->metadata = metadata;
1108 encoder->protected_->num_metadata_blocks = num_blocks;
1112 FLAC__bool FLAC__stream_encoder_set_write_callback(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderWriteCallback value)
1114 FLAC__ASSERT(0 != encoder);
1115 FLAC__ASSERT(0 != value);
1116 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1118 encoder->private_->write_callback = value;
1122 FLAC__bool FLAC__stream_encoder_set_metadata_callback(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderMetadataCallback value)
1124 FLAC__ASSERT(0 != encoder);
1125 FLAC__ASSERT(0 != value);
1126 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1128 encoder->private_->metadata_callback = value;
1132 FLAC__bool FLAC__stream_encoder_set_client_data(FLAC__StreamEncoder *encoder, void *value)
1134 FLAC__ASSERT(0 != encoder);
1135 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1137 encoder->private_->client_data = value;
1142 * These three functions are not static, but not publically exposed in
1143 * include/FLAC/ either. They are used by the test suite.
1145 FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1147 FLAC__ASSERT(0 != encoder);
1148 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1150 encoder->private_->disable_constant_subframes = value;
1154 FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1156 FLAC__ASSERT(0 != encoder);
1157 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1159 encoder->private_->disable_fixed_subframes = value;
1163 FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1165 FLAC__ASSERT(0 != encoder);
1166 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1168 encoder->private_->disable_verbatim_subframes = value;
1172 FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
1174 FLAC__ASSERT(0 != encoder);
1175 return encoder->protected_->state;
1178 FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder)
1180 FLAC__ASSERT(0 != encoder);
1181 if(encoder->protected_->verify)
1182 return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder);
1184 return FLAC__STREAM_DECODER_UNINITIALIZED;
1187 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)
1189 FLAC__ASSERT(0 != encoder);
1190 if(0 != absolute_sample)
1191 *absolute_sample = encoder->private_->verify.error_stats.absolute_sample;
1192 if(0 != frame_number)
1193 *frame_number = encoder->private_->verify.error_stats.frame_number;
1195 *channel = encoder->private_->verify.error_stats.channel;
1197 *sample = encoder->private_->verify.error_stats.sample;
1199 *expected = encoder->private_->verify.error_stats.expected;
1201 *got = encoder->private_->verify.error_stats.got;
1204 FLAC__bool FLAC__stream_encoder_get_verify(const FLAC__StreamEncoder *encoder)
1206 FLAC__ASSERT(0 != encoder);
1207 return encoder->protected_->verify;
1210 FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder)
1212 FLAC__ASSERT(0 != encoder);
1213 return encoder->protected_->streamable_subset;
1216 FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder)
1218 FLAC__ASSERT(0 != encoder);
1219 return encoder->protected_->do_mid_side_stereo;
1222 FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder)
1224 FLAC__ASSERT(0 != encoder);
1225 return encoder->protected_->loose_mid_side_stereo;
1228 unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder)
1230 FLAC__ASSERT(0 != encoder);
1231 return encoder->protected_->channels;
1234 unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder)
1236 FLAC__ASSERT(0 != encoder);
1237 return encoder->protected_->bits_per_sample;
1240 unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder)
1242 FLAC__ASSERT(0 != encoder);
1243 return encoder->protected_->sample_rate;
1246 unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder)
1248 FLAC__ASSERT(0 != encoder);
1249 return encoder->protected_->blocksize;
1252 unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder)
1254 FLAC__ASSERT(0 != encoder);
1255 return encoder->protected_->max_lpc_order;
1258 unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder)
1260 FLAC__ASSERT(0 != encoder);
1261 return encoder->protected_->qlp_coeff_precision;
1264 FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder)
1266 FLAC__ASSERT(0 != encoder);
1267 return encoder->protected_->do_qlp_coeff_prec_search;
1270 FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder)
1272 FLAC__ASSERT(0 != encoder);
1273 return encoder->protected_->do_escape_coding;
1276 FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder)
1278 FLAC__ASSERT(0 != encoder);
1279 return encoder->protected_->do_exhaustive_model_search;
1282 unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder)
1284 FLAC__ASSERT(0 != encoder);
1285 return encoder->protected_->min_residual_partition_order;
1288 unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder)
1290 FLAC__ASSERT(0 != encoder);
1291 return encoder->protected_->max_residual_partition_order;
1294 unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder)
1296 FLAC__ASSERT(0 != encoder);
1297 return encoder->protected_->rice_parameter_search_dist;
1300 FLAC__uint64 FLAC__stream_encoder_get_total_samples_estimate(const FLAC__StreamEncoder *encoder)
1302 FLAC__ASSERT(0 != encoder);
1303 return encoder->protected_->total_samples_estimate;
1306 FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples)
1308 unsigned i, j, channel;
1309 FLAC__int32 x, mid, side;
1310 const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
1312 FLAC__ASSERT(0 != encoder);
1313 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
1316 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
1318 if(encoder->protected_->verify)
1319 append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
1321 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
1322 x = mid = side = buffer[0][j];
1323 encoder->private_->integer_signal[0][i] = x;
1324 encoder->private_->real_signal[0][i] = (FLAC__real)x;
1326 encoder->private_->integer_signal[1][i] = x;
1327 encoder->private_->real_signal[1][i] = (FLAC__real)x;
1330 mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
1331 encoder->private_->integer_signal_mid_side[1][i] = side;
1332 encoder->private_->integer_signal_mid_side[0][i] = mid;
1333 encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
1334 encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
1335 encoder->private_->current_sample_number++;
1337 if(i == blocksize) {
1338 if(!process_frame_(encoder, false)) /* false => not last frame */
1341 } while(j < samples);
1345 if(encoder->protected_->verify)
1346 append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
1348 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
1349 for(channel = 0; channel < channels; channel++) {
1350 x = buffer[channel][j];
1351 encoder->private_->integer_signal[channel][i] = x;
1352 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
1354 encoder->private_->current_sample_number++;
1356 if(i == blocksize) {
1357 if(!process_frame_(encoder, false)) /* false => not last frame */
1360 } while(j < samples);
1366 FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples)
1368 unsigned i, j, k, channel;
1369 FLAC__int32 x, mid, side;
1370 const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
1372 FLAC__ASSERT(0 != encoder);
1373 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
1376 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
1378 if(encoder->protected_->verify)
1379 append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
1381 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
1382 x = mid = side = buffer[k++];
1383 encoder->private_->integer_signal[0][i] = x;
1384 encoder->private_->real_signal[0][i] = (FLAC__real)x;
1386 encoder->private_->integer_signal[1][i] = x;
1387 encoder->private_->real_signal[1][i] = (FLAC__real)x;
1390 mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
1391 encoder->private_->integer_signal_mid_side[1][i] = side;
1392 encoder->private_->integer_signal_mid_side[0][i] = mid;
1393 encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
1394 encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
1395 encoder->private_->current_sample_number++;
1397 if(i == blocksize) {
1398 if(!process_frame_(encoder, false)) /* false => not last frame */
1401 } while(j < samples);
1405 if(encoder->protected_->verify)
1406 append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
1408 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
1409 for(channel = 0; channel < channels; channel++) {
1411 encoder->private_->integer_signal[channel][i] = x;
1412 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
1414 encoder->private_->current_sample_number++;
1416 if(i == blocksize) {
1417 if(!process_frame_(encoder, false)) /* false => not last frame */
1420 } while(j < samples);
1426 /***********************************************************************
1428 * Private class methods
1430 ***********************************************************************/
1432 void set_defaults_(FLAC__StreamEncoder *encoder)
1434 FLAC__ASSERT(0 != encoder);
1436 encoder->protected_->verify = false;
1437 encoder->protected_->streamable_subset = true;
1438 encoder->protected_->do_mid_side_stereo = false;
1439 encoder->protected_->loose_mid_side_stereo = false;
1440 encoder->protected_->channels = 2;
1441 encoder->protected_->bits_per_sample = 16;
1442 encoder->protected_->sample_rate = 44100;
1443 encoder->protected_->blocksize = 1152;
1444 encoder->protected_->max_lpc_order = 0;
1445 encoder->protected_->qlp_coeff_precision = 0;
1446 encoder->protected_->do_qlp_coeff_prec_search = false;
1447 encoder->protected_->do_exhaustive_model_search = false;
1448 encoder->protected_->do_escape_coding = false;
1449 encoder->protected_->min_residual_partition_order = 0;
1450 encoder->protected_->max_residual_partition_order = 0;
1451 encoder->protected_->rice_parameter_search_dist = 0;
1452 encoder->protected_->total_samples_estimate = 0;
1453 encoder->protected_->metadata = 0;
1454 encoder->protected_->num_metadata_blocks = 0;
1456 encoder->private_->disable_constant_subframes = false;
1457 encoder->private_->disable_fixed_subframes = false;
1458 encoder->private_->disable_verbatim_subframes = false;
1459 encoder->private_->write_callback = 0;
1460 encoder->private_->metadata_callback = 0;
1461 encoder->private_->client_data = 0;
1464 void free_(FLAC__StreamEncoder *encoder)
1466 unsigned i, channel;
1468 FLAC__ASSERT(0 != encoder);
1469 for(i = 0; i < encoder->protected_->channels; i++) {
1470 if(0 != encoder->private_->integer_signal_unaligned[i]) {
1471 free(encoder->private_->integer_signal_unaligned[i]);
1472 encoder->private_->integer_signal_unaligned[i] = 0;
1474 if(0 != encoder->private_->real_signal_unaligned[i]) {
1475 free(encoder->private_->real_signal_unaligned[i]);
1476 encoder->private_->real_signal_unaligned[i] = 0;
1479 for(i = 0; i < 2; i++) {
1480 if(0 != encoder->private_->integer_signal_mid_side_unaligned[i]) {
1481 free(encoder->private_->integer_signal_mid_side_unaligned[i]);
1482 encoder->private_->integer_signal_mid_side_unaligned[i] = 0;
1484 if(0 != encoder->private_->real_signal_mid_side_unaligned[i]) {
1485 free(encoder->private_->real_signal_mid_side_unaligned[i]);
1486 encoder->private_->real_signal_mid_side_unaligned[i] = 0;
1489 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1490 for(i = 0; i < 2; i++) {
1491 if(0 != encoder->private_->residual_workspace_unaligned[channel][i]) {
1492 free(encoder->private_->residual_workspace_unaligned[channel][i]);
1493 encoder->private_->residual_workspace_unaligned[channel][i] = 0;
1497 for(channel = 0; channel < 2; channel++) {
1498 for(i = 0; i < 2; i++) {
1499 if(0 != encoder->private_->residual_workspace_mid_side_unaligned[channel][i]) {
1500 free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]);
1501 encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0;
1505 if(0 != encoder->private_->abs_residual_unaligned) {
1506 free(encoder->private_->abs_residual_unaligned);
1507 encoder->private_->abs_residual_unaligned = 0;
1509 if(0 != encoder->private_->abs_residual_partition_sums_unaligned) {
1510 free(encoder->private_->abs_residual_partition_sums_unaligned);
1511 encoder->private_->abs_residual_partition_sums_unaligned = 0;
1513 if(0 != encoder->private_->raw_bits_per_partition_unaligned) {
1514 free(encoder->private_->raw_bits_per_partition_unaligned);
1515 encoder->private_->raw_bits_per_partition_unaligned = 0;
1517 if(encoder->protected_->verify) {
1518 for(i = 0; i < encoder->protected_->channels; i++) {
1519 if(0 != encoder->private_->verify.input_fifo.data[i]) {
1520 free(encoder->private_->verify.input_fifo.data[i]);
1521 encoder->private_->verify.input_fifo.data[i] = 0;
1525 FLAC__bitbuffer_free(encoder->private_->frame);
1528 FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size)
1531 unsigned i, channel;
1533 FLAC__ASSERT(new_size > 0);
1534 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
1535 FLAC__ASSERT(encoder->private_->current_sample_number == 0);
1537 /* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */
1538 if(new_size <= encoder->private_->input_capacity)
1543 /* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx()
1544 * requires that the input arrays (in our case the integer signals)
1545 * have a buffer of up to 3 zeroes in front (at negative indices) for
1546 * alignment purposes; we use 4 to keep the data well-aligned.
1549 for(i = 0; ok && i < encoder->protected_->channels; i++) {
1550 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]);
1551 ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]);
1552 memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4);
1553 encoder->private_->integer_signal[i] += 4;
1555 for(i = 0; ok && i < 2; i++) {
1556 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]);
1557 ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]);
1558 memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4);
1559 encoder->private_->integer_signal_mid_side[i] += 4;
1561 for(channel = 0; ok && channel < encoder->protected_->channels; channel++) {
1562 for(i = 0; ok && i < 2; i++) {
1563 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]);
1566 for(channel = 0; ok && channel < 2; channel++) {
1567 for(i = 0; ok && i < 2; i++) {
1568 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]);
1571 ok = ok && FLAC__memory_alloc_aligned_uint32_array(new_size, &encoder->private_->abs_residual_unaligned, &encoder->private_->abs_residual);
1572 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 */
1573 ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_size * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums);
1574 if(encoder->protected_->do_escape_coding)
1575 ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_size * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition);
1578 encoder->private_->input_capacity = new_size;
1580 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1585 FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples)
1587 const FLAC__byte *buffer;
1590 FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
1592 FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
1594 if(encoder->protected_->verify) {
1595 encoder->private_->verify.output.data = buffer;
1596 encoder->private_->verify.output.bytes = bytes;
1597 if(encoder->private_->verify.state_hint == ENCODER_IN_MAGIC) {
1598 encoder->private_->verify.needs_magic_hack = true;
1601 if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) {
1602 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
1603 if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
1604 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
1610 if(encoder->private_->write_callback(encoder, buffer, bytes, samples, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
1611 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
1615 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
1618 encoder->private_->metadata.data.stream_info.min_framesize = min(bytes, encoder->private_->metadata.data.stream_info.min_framesize);
1619 encoder->private_->metadata.data.stream_info.max_framesize = max(bytes, encoder->private_->metadata.data.stream_info.max_framesize);
1625 FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
1627 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
1630 * Accumulate raw signal to the MD5 signature
1632 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)) {
1633 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1638 * Process the frame header and subframes into the frame bitbuffer
1640 if(!process_subframes_(encoder, is_last_frame)) {
1641 /* the above function sets the state for us in case of an error */
1646 * Zero-pad the frame to a byte_boundary
1648 if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(encoder->private_->frame)) {
1649 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1654 * CRC-16 the whole thing
1656 FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
1657 FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__bitbuffer_get_write_crc16(encoder->private_->frame), FLAC__FRAME_FOOTER_CRC_LEN);
1662 if(!write_bitbuffer_(encoder, encoder->protected_->blocksize)) {
1663 /* the above function sets the state for us in case of an error */
1668 * Get ready for the next frame
1670 encoder->private_->current_sample_number = 0;
1671 encoder->private_->current_frame_number++;
1672 encoder->private_->metadata.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
1677 FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
1679 FLAC__FrameHeader frame_header;
1680 unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order;
1681 FLAC__bool do_independent, do_mid_side, precompute_partition_sums;
1684 * Calculate the min,max Rice partition orders
1687 max_partition_order = 0;
1690 max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize(encoder->protected_->blocksize);
1691 max_partition_order = min(max_partition_order, encoder->protected_->max_residual_partition_order);
1693 min_partition_order = min(min_partition_order, max_partition_order);
1695 precompute_partition_sums = encoder->private_->precompute_partition_sums && ((max_partition_order > min_partition_order) || encoder->protected_->do_escape_coding);
1700 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1701 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1704 frame_header.blocksize = encoder->protected_->blocksize;
1705 frame_header.sample_rate = encoder->protected_->sample_rate;
1706 frame_header.channels = encoder->protected_->channels;
1707 frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */
1708 frame_header.bits_per_sample = encoder->protected_->bits_per_sample;
1709 frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
1710 frame_header.number.frame_number = encoder->private_->current_frame_number;
1713 * Figure out what channel assignments to try
1715 if(encoder->protected_->do_mid_side_stereo) {
1716 if(encoder->protected_->loose_mid_side_stereo) {
1717 if(encoder->private_->loose_mid_side_stereo_frame_count == 0) {
1718 do_independent = true;
1722 do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT);
1723 do_mid_side = !do_independent;
1727 do_independent = true;
1732 do_independent = true;
1733 do_mid_side = false;
1736 FLAC__ASSERT(do_independent || do_mid_side);
1739 * Check for wasted bits; set effective bps for each subframe
1741 if(do_independent) {
1742 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1743 const unsigned w = get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
1744 encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w;
1745 encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w;
1749 FLAC__ASSERT(encoder->protected_->channels == 2);
1750 for(channel = 0; channel < 2; channel++) {
1751 const unsigned w = get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize);
1752 encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w;
1753 encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1);
1758 * First do a normal encoding pass of each independent channel
1760 if(do_independent) {
1761 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1765 min_partition_order,
1766 max_partition_order,
1767 precompute_partition_sums,
1769 encoder->private_->subframe_bps[channel],
1770 encoder->private_->integer_signal[channel],
1771 encoder->private_->real_signal[channel],
1772 encoder->private_->subframe_workspace_ptr[channel],
1773 encoder->private_->partitioned_rice_contents_workspace_ptr[channel],
1774 encoder->private_->residual_workspace[channel],
1775 encoder->private_->best_subframe+channel,
1776 encoder->private_->best_subframe_bits+channel
1784 * Now do mid and side channels if requested
1787 FLAC__ASSERT(encoder->protected_->channels == 2);
1789 for(channel = 0; channel < 2; channel++) {
1793 min_partition_order,
1794 max_partition_order,
1795 precompute_partition_sums,
1797 encoder->private_->subframe_bps_mid_side[channel],
1798 encoder->private_->integer_signal_mid_side[channel],
1799 encoder->private_->real_signal_mid_side[channel],
1800 encoder->private_->subframe_workspace_ptr_mid_side[channel],
1801 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[channel],
1802 encoder->private_->residual_workspace_mid_side[channel],
1803 encoder->private_->best_subframe_mid_side+channel,
1804 encoder->private_->best_subframe_bits_mid_side+channel
1812 * Compose the frame bitbuffer
1815 unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */
1816 FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */
1817 FLAC__ChannelAssignment channel_assignment;
1819 FLAC__ASSERT(encoder->protected_->channels == 2);
1821 if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) {
1822 channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE);
1825 unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */
1827 FLAC__ChannelAssignment ca;
1829 FLAC__ASSERT(do_independent && do_mid_side);
1831 /* We have to figure out which channel assignent results in the smallest frame */
1832 bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits [1];
1833 bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE ] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits_mid_side[1];
1834 bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits [1] + encoder->private_->best_subframe_bits_mid_side[1];
1835 bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1];
1837 for(channel_assignment = 0, min_bits = bits[0], ca = 1; ca <= 3; ca++) {
1838 if(bits[ca] < min_bits) {
1839 min_bits = bits[ca];
1840 channel_assignment = ca;
1845 frame_header.channel_assignment = channel_assignment;
1847 if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, encoder->private_->frame)) {
1848 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1852 switch(channel_assignment) {
1853 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1854 left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
1855 right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
1857 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1858 left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
1859 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1861 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1862 left_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1863 right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
1865 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1866 left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
1867 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1873 switch(channel_assignment) {
1874 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1875 left_bps = encoder->private_->subframe_bps [0];
1876 right_bps = encoder->private_->subframe_bps [1];
1878 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1879 left_bps = encoder->private_->subframe_bps [0];
1880 right_bps = encoder->private_->subframe_bps_mid_side[1];
1882 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1883 left_bps = encoder->private_->subframe_bps_mid_side[1];
1884 right_bps = encoder->private_->subframe_bps [1];
1886 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1887 left_bps = encoder->private_->subframe_bps_mid_side[0];
1888 right_bps = encoder->private_->subframe_bps_mid_side[1];
1894 /* note that encoder_add_subframe_ sets the state for us in case of an error */
1895 if(!add_subframe_(encoder, &frame_header, left_bps , left_subframe , encoder->private_->frame))
1897 if(!add_subframe_(encoder, &frame_header, right_bps, right_subframe, encoder->private_->frame))
1901 if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, encoder->private_->frame)) {
1902 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1906 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1907 if(!add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) {
1908 /* the above function sets the state for us in case of an error */
1914 if(encoder->protected_->loose_mid_side_stereo) {
1915 encoder->private_->loose_mid_side_stereo_frame_count++;
1916 if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames)
1917 encoder->private_->loose_mid_side_stereo_frame_count = 0;
1920 encoder->private_->last_channel_assignment = frame_header.channel_assignment;
1925 FLAC__bool process_subframe_(
1926 FLAC__StreamEncoder *encoder,
1927 unsigned min_partition_order,
1928 unsigned max_partition_order,
1929 FLAC__bool precompute_partition_sums,
1930 const FLAC__FrameHeader *frame_header,
1931 unsigned subframe_bps,
1932 const FLAC__int32 integer_signal[],
1933 const FLAC__real real_signal[],
1934 FLAC__Subframe *subframe[2],
1935 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
1936 FLAC__int32 *residual[2],
1937 unsigned *best_subframe,
1941 FLAC__real fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
1942 FLAC__real lpc_residual_bits_per_sample;
1943 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 */
1944 FLAC__real lpc_error[FLAC__MAX_LPC_ORDER];
1945 unsigned min_lpc_order, max_lpc_order, lpc_order;
1946 unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order;
1947 unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision;
1948 unsigned rice_parameter;
1949 unsigned _candidate_bits, _best_bits;
1950 unsigned _best_subframe;
1952 /* verbatim subframe is the baseline against which we measure other compressed subframes */
1954 if(encoder->private_->disable_verbatim_subframes && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER)
1955 _best_bits = UINT_MAX;
1957 _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
1959 if(frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) {
1960 unsigned signal_is_constant = false;
1961 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);
1962 /* check for constant subframe */
1963 if(!encoder->private_->disable_constant_subframes && fixed_residual_bits_per_sample[1] == 0.0) {
1964 /* the above means integer_signal+FLAC__MAX_FIXED_ORDER is constant, now we just have to check the warmup samples */
1966 signal_is_constant = true;
1967 for(i = 1; i <= FLAC__MAX_FIXED_ORDER; i++) {
1968 if(integer_signal[0] != integer_signal[i]) {
1969 signal_is_constant = false;
1974 if(signal_is_constant) {
1975 _candidate_bits = evaluate_constant_subframe_(integer_signal[0], subframe_bps, subframe[!_best_subframe]);
1976 if(_candidate_bits < _best_bits) {
1977 _best_subframe = !_best_subframe;
1978 _best_bits = _candidate_bits;
1982 if(!encoder->private_->disable_fixed_subframes || (encoder->protected_->max_lpc_order == 0 && _best_bits == UINT_MAX)) {
1984 if(encoder->protected_->do_exhaustive_model_search) {
1985 min_fixed_order = 0;
1986 max_fixed_order = FLAC__MAX_FIXED_ORDER;
1989 min_fixed_order = max_fixed_order = guess_fixed_order;
1991 for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) {
1992 if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__real)subframe_bps)
1993 continue; /* don't even try */
1994 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 */
1995 #ifndef FLAC__SYMMETRIC_RICE
1996 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
1998 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1999 #ifdef DEBUG_VERBOSE
2000 fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2002 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2005 evaluate_fixed_subframe_(
2008 residual[!_best_subframe],
2009 encoder->private_->abs_residual,
2010 encoder->private_->abs_residual_partition_sums,
2011 encoder->private_->raw_bits_per_partition,
2012 frame_header->blocksize,
2016 min_partition_order,
2017 max_partition_order,
2018 precompute_partition_sums,
2019 encoder->protected_->do_escape_coding,
2020 encoder->protected_->rice_parameter_search_dist,
2021 subframe[!_best_subframe],
2022 partitioned_rice_contents[!_best_subframe]
2024 if(_candidate_bits < _best_bits) {
2025 _best_subframe = !_best_subframe;
2026 _best_bits = _candidate_bits;
2032 if(encoder->protected_->max_lpc_order > 0) {
2033 if(encoder->protected_->max_lpc_order >= frame_header->blocksize)
2034 max_lpc_order = frame_header->blocksize-1;
2036 max_lpc_order = encoder->protected_->max_lpc_order;
2037 if(max_lpc_order > 0) {
2038 encoder->private_->local_lpc_compute_autocorrelation(real_signal, frame_header->blocksize, max_lpc_order+1, autoc);
2039 /* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */
2040 if(autoc[0] != 0.0) {
2041 FLAC__lpc_compute_lp_coefficients(autoc, max_lpc_order, encoder->private_->lp_coeff, lpc_error);
2042 if(encoder->protected_->do_exhaustive_model_search) {
2046 unsigned guess_lpc_order = FLAC__lpc_compute_best_order(lpc_error, max_lpc_order, frame_header->blocksize, subframe_bps);
2047 min_lpc_order = max_lpc_order = guess_lpc_order;
2049 for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) {
2050 lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order);
2051 if(lpc_residual_bits_per_sample >= (FLAC__real)subframe_bps)
2052 continue; /* don't even try */
2053 rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */
2054 #ifndef FLAC__SYMMETRIC_RICE
2055 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
2057 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2058 #ifdef DEBUG_VERBOSE
2059 fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2061 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2063 if(encoder->protected_->do_qlp_coeff_prec_search) {
2064 min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
2065 /* ensure a 32-bit datapath throughout for 16bps or less */
2066 if(subframe_bps <= 16)
2067 max_qlp_coeff_precision = min(32 - subframe_bps - lpc_order, FLAC__MAX_QLP_COEFF_PRECISION);
2069 max_qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
2072 min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision;
2074 for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) {
2076 evaluate_lpc_subframe_(
2079 residual[!_best_subframe],
2080 encoder->private_->abs_residual,
2081 encoder->private_->abs_residual_partition_sums,
2082 encoder->private_->raw_bits_per_partition,
2083 encoder->private_->lp_coeff[lpc_order-1],
2084 frame_header->blocksize,
2087 qlp_coeff_precision,
2089 min_partition_order,
2090 max_partition_order,
2091 precompute_partition_sums,
2092 encoder->protected_->do_escape_coding,
2093 encoder->protected_->rice_parameter_search_dist,
2094 subframe[!_best_subframe],
2095 partitioned_rice_contents[!_best_subframe]
2097 if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */
2098 if(_candidate_bits < _best_bits) {
2099 _best_subframe = !_best_subframe;
2100 _best_bits = _candidate_bits;
2111 /* under rare circumstances this can happen when all but lpc subframe types are disabled: */
2112 if(_best_bits == UINT_MAX) {
2113 FLAC__ASSERT(_best_subframe == 0);
2114 _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
2117 *best_subframe = _best_subframe;
2118 *best_bits = _best_bits;
2123 FLAC__bool add_subframe_(
2124 FLAC__StreamEncoder *encoder,
2125 const FLAC__FrameHeader *frame_header,
2126 unsigned subframe_bps,
2127 const FLAC__Subframe *subframe,
2128 FLAC__BitBuffer *frame
2131 switch(subframe->type) {
2132 case FLAC__SUBFRAME_TYPE_CONSTANT:
2133 //@@@@fprintf(stderr,"@@@@ add CONSTANT, bps=%u\n",subframe_bps);
2134 if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) {
2135 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
2139 case FLAC__SUBFRAME_TYPE_FIXED:
2140 //@@@@fprintf(stderr,"@@@@ add FIXED, bps=%u, order=%u\n",subframe_bps,subframe->data.fixed.order);
2141 if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), frame_header->blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) {
2142 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
2146 case FLAC__SUBFRAME_TYPE_LPC:
2147 //@@@@fprintf(stderr,"@@@@ add LPC, bps=%u, order=%u, prec=%u, shift=%d\n",subframe_bps,subframe->data.lpc.order,subframe->data.lpc.qlp_coeff_precision,subframe->data.lpc.quantization_level);
2148 if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), frame_header->blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) {
2149 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
2153 case FLAC__SUBFRAME_TYPE_VERBATIM:
2154 //@@@@fprintf(stderr,"@@@@ add VERBATIM, bps=%u\n",subframe_bps);
2155 if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), frame_header->blocksize, subframe_bps, subframe->wasted_bits, frame)) {
2156 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
2167 unsigned evaluate_constant_subframe_(
2168 const FLAC__int32 signal,
2169 unsigned subframe_bps,
2170 FLAC__Subframe *subframe
2173 subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT;
2174 subframe->data.constant.value = signal;
2176 return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe_bps;
2179 unsigned evaluate_fixed_subframe_(
2180 FLAC__StreamEncoder *encoder,
2181 const FLAC__int32 signal[],
2182 FLAC__int32 residual[],
2183 FLAC__uint32 abs_residual[],
2184 FLAC__uint64 abs_residual_partition_sums[],
2185 unsigned raw_bits_per_partition[],
2187 unsigned subframe_bps,
2189 unsigned rice_parameter,
2190 unsigned min_partition_order,
2191 unsigned max_partition_order,
2192 FLAC__bool precompute_partition_sums,
2193 FLAC__bool do_escape_coding,
2194 unsigned rice_parameter_search_dist,
2195 FLAC__Subframe *subframe,
2196 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
2199 unsigned i, residual_bits;
2200 const unsigned residual_samples = blocksize - order;
2202 FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual);
2204 subframe->type = FLAC__SUBFRAME_TYPE_FIXED;
2206 subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
2207 subframe->data.fixed.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents;
2208 subframe->data.fixed.residual = residual;
2211 find_best_partition_order_(
2215 abs_residual_partition_sums,
2216 raw_bits_per_partition,
2220 min_partition_order,
2221 max_partition_order,
2222 precompute_partition_sums,
2224 rice_parameter_search_dist,
2225 &subframe->data.fixed.entropy_coding_method.data.partitioned_rice
2228 subframe->data.fixed.order = order;
2229 for(i = 0; i < order; i++)
2230 subframe->data.fixed.warmup[i] = signal[i];
2232 return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (order * subframe_bps) + residual_bits;
2235 unsigned evaluate_lpc_subframe_(
2236 FLAC__StreamEncoder *encoder,
2237 const FLAC__int32 signal[],
2238 FLAC__int32 residual[],
2239 FLAC__uint32 abs_residual[],
2240 FLAC__uint64 abs_residual_partition_sums[],
2241 unsigned raw_bits_per_partition[],
2242 const FLAC__real lp_coeff[],
2244 unsigned subframe_bps,
2246 unsigned qlp_coeff_precision,
2247 unsigned rice_parameter,
2248 unsigned min_partition_order,
2249 unsigned max_partition_order,
2250 FLAC__bool precompute_partition_sums,
2251 FLAC__bool do_escape_coding,
2252 unsigned rice_parameter_search_dist,
2253 FLAC__Subframe *subframe,
2254 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
2257 FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER];
2258 unsigned i, residual_bits;
2259 int quantization, ret;
2260 const unsigned residual_samples = blocksize - order;
2262 /* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */
2263 if(subframe_bps <= 16) {
2264 FLAC__ASSERT(order > 0);
2265 FLAC__ASSERT(order <= FLAC__MAX_LPC_ORDER);
2266 qlp_coeff_precision = min(qlp_coeff_precision, 32 - subframe_bps - FLAC__bitmath_ilog2(order));
2269 ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, qlp_coeff, &quantization);
2271 return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */
2273 if(subframe_bps <= 16 && qlp_coeff_precision <= 16)
2274 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
2275 else if(subframe_bps + qlp_coeff_precision + order <= 32)
2276 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
2278 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
2280 subframe->type = FLAC__SUBFRAME_TYPE_LPC;
2282 subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
2283 subframe->data.lpc.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents;
2284 subframe->data.lpc.residual = residual;
2287 find_best_partition_order_(
2291 abs_residual_partition_sums,
2292 raw_bits_per_partition,
2296 min_partition_order,
2297 max_partition_order,
2298 precompute_partition_sums,
2300 rice_parameter_search_dist,
2301 &subframe->data.fixed.entropy_coding_method.data.partitioned_rice
2304 subframe->data.lpc.order = order;
2305 subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision;
2306 subframe->data.lpc.quantization_level = quantization;
2307 memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER);
2308 for(i = 0; i < order; i++)
2309 subframe->data.lpc.warmup[i] = signal[i];
2311 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;
2314 unsigned evaluate_verbatim_subframe_(
2315 const FLAC__int32 signal[],
2317 unsigned subframe_bps,
2318 FLAC__Subframe *subframe
2321 subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM;
2323 subframe->data.verbatim.data = signal;
2325 return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (blocksize * subframe_bps);
2328 unsigned find_best_partition_order_(
2329 FLAC__StreamEncoderPrivate *private_,
2330 const FLAC__int32 residual[],
2331 FLAC__uint32 abs_residual[],
2332 FLAC__uint64 abs_residual_partition_sums[],
2333 unsigned raw_bits_per_partition[],
2334 unsigned residual_samples,
2335 unsigned predictor_order,
2336 unsigned rice_parameter,
2337 unsigned min_partition_order,
2338 unsigned max_partition_order,
2339 FLAC__bool precompute_partition_sums,
2340 FLAC__bool do_escape_coding,
2341 unsigned rice_parameter_search_dist,
2342 FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice
2346 unsigned residual_bits, best_residual_bits = 0;
2347 unsigned residual_sample;
2348 unsigned best_parameters_index = 0;
2349 const unsigned blocksize = residual_samples + predictor_order;
2351 /* compute abs(residual) for use later */
2352 for(residual_sample = 0; residual_sample < residual_samples; residual_sample++) {
2353 r = residual[residual_sample];
2354 abs_residual[residual_sample] = (FLAC__uint32)(r<0? -r : r);
2357 max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(max_partition_order, blocksize, predictor_order);
2358 min_partition_order = min(min_partition_order, max_partition_order);
2360 if(precompute_partition_sums) {
2361 int partition_order;
2364 precompute_partition_info_sums_(abs_residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order);
2366 if(do_escape_coding)
2367 precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order);
2369 for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) {
2370 #ifdef DONT_ESTIMATE_RICE_BITS
2372 set_partitioned_rice_with_precompute_(
2374 abs_residual_partition_sums+sum,
2375 raw_bits_per_partition+sum,
2379 rice_parameter_search_dist,
2380 (unsigned)partition_order,
2382 &private_->partitioned_rice_contents_extra[!best_parameters_index],
2388 set_partitioned_rice_with_precompute_(
2390 abs_residual_partition_sums+sum,
2391 raw_bits_per_partition+sum,
2395 rice_parameter_search_dist,
2396 (unsigned)partition_order,
2398 &private_->partitioned_rice_contents_extra[!best_parameters_index],
2404 FLAC__ASSERT(best_residual_bits != 0);
2407 sum += 1u << partition_order;
2408 if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
2409 best_residual_bits = residual_bits;
2410 best_parameters_index = !best_parameters_index;
2411 best_partitioned_rice->order = partition_order;
2416 unsigned partition_order;
2417 for(partition_order = min_partition_order; partition_order <= max_partition_order; partition_order++) {
2418 #ifdef DONT_ESTIMATE_RICE_BITS
2420 set_partitioned_rice_(
2426 rice_parameter_search_dist,
2428 &private_->partitioned_rice_contents_extra[!best_parameters_index],
2434 set_partitioned_rice_(
2439 rice_parameter_search_dist,
2441 &private_->partitioned_rice_contents_extra[!best_parameters_index],
2447 FLAC__ASSERT(best_residual_bits != 0);
2450 if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
2451 best_residual_bits = residual_bits;
2452 best_parameters_index = !best_parameters_index;
2453 best_partitioned_rice->order = partition_order;
2459 * We are allowed to de-const the pointer based on our special knowledge;
2460 * it is const to the outside world.
2463 FLAC__EntropyCodingMethod_PartitionedRiceContents* best_partitioned_rice_contents = (FLAC__EntropyCodingMethod_PartitionedRiceContents*)best_partitioned_rice->contents;
2464 FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(best_partitioned_rice_contents, max(6, best_partitioned_rice->order));
2465 memcpy(best_partitioned_rice_contents->parameters, private_->partitioned_rice_contents_extra[best_parameters_index].parameters, sizeof(unsigned)*(1<<(best_partitioned_rice->order)));
2466 memcpy(best_partitioned_rice_contents->raw_bits, private_->partitioned_rice_contents_extra[best_parameters_index].raw_bits, sizeof(unsigned)*(1<<(best_partitioned_rice->order)));
2469 return best_residual_bits;
2472 void precompute_partition_info_sums_(
2473 const FLAC__uint32 abs_residual[],
2474 FLAC__uint64 abs_residual_partition_sums[],
2475 unsigned residual_samples,
2476 unsigned predictor_order,
2477 unsigned min_partition_order,
2478 unsigned max_partition_order
2481 int partition_order;
2482 unsigned from_partition, to_partition = 0;
2483 const unsigned blocksize = residual_samples + predictor_order;
2485 /* first do max_partition_order */
2486 for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
2487 FLAC__uint64 abs_residual_partition_sum;
2489 unsigned partition, partition_sample, partition_samples, residual_sample;
2490 const unsigned partitions = 1u << partition_order;
2491 const unsigned default_partition_samples = blocksize >> partition_order;
2493 FLAC__ASSERT(default_partition_samples > predictor_order);
2495 for(partition = residual_sample = 0; partition < partitions; partition++) {
2496 partition_samples = default_partition_samples;
2498 partition_samples -= predictor_order;
2499 abs_residual_partition_sum = 0;
2500 for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
2501 abs_r = abs_residual[residual_sample];
2502 abs_residual_partition_sum += abs_r;
2505 abs_residual_partition_sums[partition] = abs_residual_partition_sum;
2507 to_partition = partitions;
2511 /* now merge partitions for lower orders */
2512 for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
2515 const unsigned partitions = 1u << partition_order;
2516 for(i = 0; i < partitions; i++) {
2517 s = abs_residual_partition_sums[from_partition];
2519 abs_residual_partition_sums[to_partition] = s + abs_residual_partition_sums[from_partition];
2526 void precompute_partition_info_escapes_(
2527 const FLAC__int32 residual[],
2528 unsigned raw_bits_per_partition[],
2529 unsigned residual_samples,
2530 unsigned predictor_order,
2531 unsigned min_partition_order,
2532 unsigned max_partition_order
2535 int partition_order;
2536 unsigned from_partition, to_partition = 0;
2537 const unsigned blocksize = residual_samples + predictor_order;
2539 /* first do max_partition_order */
2540 for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
2541 FLAC__int32 r, residual_partition_min, residual_partition_max;
2542 unsigned silog2_min, silog2_max;
2543 unsigned partition, partition_sample, partition_samples, residual_sample;
2544 const unsigned partitions = 1u << partition_order;
2545 const unsigned default_partition_samples = blocksize >> partition_order;
2547 FLAC__ASSERT(default_partition_samples > predictor_order);
2549 for(partition = residual_sample = 0; partition < partitions; partition++) {
2550 partition_samples = default_partition_samples;
2552 partition_samples -= predictor_order;
2553 residual_partition_min = residual_partition_max = 0;
2554 for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
2555 r = residual[residual_sample];
2556 if(r < residual_partition_min)
2557 residual_partition_min = r;
2558 else if(r > residual_partition_max)
2559 residual_partition_max = r;
2562 silog2_min = FLAC__bitmath_silog2(residual_partition_min);
2563 silog2_max = FLAC__bitmath_silog2(residual_partition_max);
2564 raw_bits_per_partition[partition] = max(silog2_min, silog2_max);
2566 to_partition = partitions;
2570 /* now merge partitions for lower orders */
2571 for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
2574 const unsigned partitions = 1u << partition_order;
2575 for(i = 0; i < partitions; i++) {
2576 m = raw_bits_per_partition[from_partition];
2578 raw_bits_per_partition[to_partition] = max(m, raw_bits_per_partition[from_partition]);
2585 #ifdef VARIABLE_RICE_BITS
2586 #undef VARIABLE_RICE_BITS
2588 #ifndef DONT_ESTIMATE_RICE_BITS
2589 #define VARIABLE_RICE_BITS(value, parameter) ((value) >> (parameter))
2592 #ifdef DONT_ESTIMATE_RICE_BITS
2593 FLAC__bool set_partitioned_rice_(
2594 const FLAC__uint32 abs_residual[],
2595 const FLAC__int32 residual[],
2596 const unsigned residual_samples,
2597 const unsigned predictor_order,
2598 const unsigned suggested_rice_parameter,
2599 const unsigned rice_parameter_search_dist,
2600 const unsigned partition_order,
2601 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
2605 FLAC__bool set_partitioned_rice_(
2606 const FLAC__uint32 abs_residual[],
2607 const unsigned residual_samples,
2608 const unsigned predictor_order,
2609 const unsigned suggested_rice_parameter,
2610 const unsigned rice_parameter_search_dist,
2611 const unsigned partition_order,
2612 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
2617 unsigned rice_parameter, partition_bits;
2618 #ifndef NO_RICE_SEARCH
2619 unsigned best_partition_bits;
2620 unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
2622 unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
2623 unsigned *parameters;
2625 FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
2627 FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order));
2628 parameters = partitioned_rice_contents->parameters;
2630 if(partition_order == 0) {
2633 #ifndef NO_RICE_SEARCH
2634 if(rice_parameter_search_dist) {
2635 if(suggested_rice_parameter < rice_parameter_search_dist)
2636 min_rice_parameter = 0;
2638 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
2639 max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
2640 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2641 #ifdef DEBUG_VERBOSE
2642 fprintf(stderr, "clipping rice_parameter (%u -> %u) @2\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2644 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2648 min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
2650 best_partition_bits = 0xffffffff;
2651 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
2653 #ifdef VARIABLE_RICE_BITS
2654 #ifdef FLAC__SYMMETRIC_RICE
2655 partition_bits = (2+rice_parameter) * residual_samples;
2657 const unsigned rice_parameter_estimate = rice_parameter-1;
2658 partition_bits = (1+rice_parameter) * residual_samples;
2663 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2664 for(i = 0; i < residual_samples; i++) {
2665 #ifdef VARIABLE_RICE_BITS
2666 #ifdef FLAC__SYMMETRIC_RICE
2667 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter);
2669 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
2672 partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
2675 #ifndef NO_RICE_SEARCH
2676 if(partition_bits < best_partition_bits) {
2677 best_rice_parameter = rice_parameter;
2678 best_partition_bits = partition_bits;
2682 parameters[0] = best_rice_parameter;
2683 bits_ += best_partition_bits;
2686 unsigned partition, residual_sample, save_residual_sample, partition_sample;
2687 unsigned partition_samples;
2688 FLAC__uint64 mean, k;
2689 const unsigned partitions = 1u << partition_order;
2690 for(partition = residual_sample = 0; partition < partitions; partition++) {
2691 partition_samples = (residual_samples+predictor_order) >> partition_order;
2692 if(partition == 0) {
2693 if(partition_samples <= predictor_order)
2696 partition_samples -= predictor_order;
2699 save_residual_sample = residual_sample;
2700 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++)
2701 mean += abs_residual[residual_sample];
2702 residual_sample = save_residual_sample;
2703 #ifdef FLAC__SYMMETRIC_RICE
2704 mean += partition_samples >> 1; /* for rounding effect */
2705 mean /= partition_samples;
2707 /* calc rice_parameter = floor(log2(mean)) */
2715 /* calc rice_parameter ala LOCO-I */
2716 for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
2719 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2720 #ifdef DEBUG_VERBOSE
2721 fprintf(stderr, "clipping rice_parameter (%u -> %u) @3\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2723 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2726 #ifndef NO_RICE_SEARCH
2727 if(rice_parameter_search_dist) {
2728 if(rice_parameter < rice_parameter_search_dist)
2729 min_rice_parameter = 0;
2731 min_rice_parameter = rice_parameter - rice_parameter_search_dist;
2732 max_rice_parameter = rice_parameter + rice_parameter_search_dist;
2733 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2734 #ifdef DEBUG_VERBOSE
2735 fprintf(stderr, "clipping rice_parameter (%u -> %u) @4\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2737 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2741 min_rice_parameter = max_rice_parameter = rice_parameter;
2743 best_partition_bits = 0xffffffff;
2744 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
2746 #ifdef VARIABLE_RICE_BITS
2747 #ifdef FLAC__SYMMETRIC_RICE
2748 partition_bits = (2+rice_parameter) * partition_samples;
2750 const unsigned rice_parameter_estimate = rice_parameter-1;
2751 partition_bits = (1+rice_parameter) * partition_samples;
2756 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2757 save_residual_sample = residual_sample;
2758 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
2759 #ifdef VARIABLE_RICE_BITS
2760 #ifdef FLAC__SYMMETRIC_RICE
2761 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter);
2763 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
2766 partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
2769 #ifndef NO_RICE_SEARCH
2770 if(rice_parameter != max_rice_parameter)
2771 residual_sample = save_residual_sample;
2772 if(partition_bits < best_partition_bits) {
2773 best_rice_parameter = rice_parameter;
2774 best_partition_bits = partition_bits;
2778 parameters[partition] = best_rice_parameter;
2779 bits_ += best_partition_bits;
2787 #ifdef DONT_ESTIMATE_RICE_BITS
2788 FLAC__bool set_partitioned_rice_with_precompute_(
2789 const FLAC__int32 residual[],
2790 const FLAC__uint64 abs_residual_partition_sums[],
2791 const unsigned raw_bits_per_partition[],
2792 const unsigned residual_samples,
2793 const unsigned predictor_order,
2794 const unsigned suggested_rice_parameter,
2795 const unsigned rice_parameter_search_dist,
2796 const unsigned partition_order,
2797 const FLAC__bool search_for_escapes,
2798 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
2802 FLAC__bool set_partitioned_rice_with_precompute_(
2803 const FLAC__uint32 abs_residual[],
2804 const FLAC__uint64 abs_residual_partition_sums[],
2805 const unsigned raw_bits_per_partition[],
2806 const unsigned residual_samples,
2807 const unsigned predictor_order,
2808 const unsigned suggested_rice_parameter,
2809 const unsigned rice_parameter_search_dist,
2810 const unsigned partition_order,
2811 const FLAC__bool search_for_escapes,
2812 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
2817 unsigned rice_parameter, partition_bits;
2818 #ifndef NO_RICE_SEARCH
2819 unsigned best_partition_bits;
2820 unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
2823 unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
2824 unsigned *parameters, *raw_bits;
2826 FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
2828 FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order));
2829 parameters = partitioned_rice_contents->parameters;
2830 raw_bits = partitioned_rice_contents->raw_bits;
2832 if(partition_order == 0) {
2835 #ifndef NO_RICE_SEARCH
2836 if(rice_parameter_search_dist) {
2837 if(suggested_rice_parameter < rice_parameter_search_dist)
2838 min_rice_parameter = 0;
2840 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
2841 max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
2842 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2843 #ifdef DEBUG_VERBOSE
2844 fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2846 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2850 min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
2852 best_partition_bits = 0xffffffff;
2853 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
2855 #ifdef VARIABLE_RICE_BITS
2856 #ifdef FLAC__SYMMETRIC_RICE
2857 partition_bits = (2+rice_parameter) * residual_samples;
2859 const unsigned rice_parameter_estimate = rice_parameter-1;
2860 partition_bits = (1+rice_parameter) * residual_samples;
2865 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2866 for(i = 0; i < residual_samples; i++) {
2867 #ifdef VARIABLE_RICE_BITS
2868 #ifdef FLAC__SYMMETRIC_RICE
2869 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter);
2871 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
2874 partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
2877 #ifndef NO_RICE_SEARCH
2878 if(partition_bits < best_partition_bits) {
2879 best_rice_parameter = rice_parameter;
2880 best_partition_bits = partition_bits;
2884 if(search_for_escapes) {
2885 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;
2886 if(flat_bits <= best_partition_bits) {
2887 raw_bits[0] = raw_bits_per_partition[0];
2888 best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2889 best_partition_bits = flat_bits;
2892 parameters[0] = best_rice_parameter;
2893 bits_ += best_partition_bits;
2896 unsigned partition, residual_sample, save_residual_sample, partition_sample;
2897 unsigned partition_samples;
2898 FLAC__uint64 mean, k;
2899 const unsigned partitions = 1u << partition_order;
2900 for(partition = residual_sample = 0; partition < partitions; partition++) {
2901 partition_samples = (residual_samples+predictor_order) >> partition_order;
2902 if(partition == 0) {
2903 if(partition_samples <= predictor_order)
2906 partition_samples -= predictor_order;
2908 mean = abs_residual_partition_sums[partition];
2909 #ifdef FLAC__SYMMETRIC_RICE
2910 mean += partition_samples >> 1; /* for rounding effect */
2911 mean /= partition_samples;
2913 /* calc rice_parameter = floor(log2(mean)) */
2921 /* calc rice_parameter ala LOCO-I */
2922 for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
2925 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2926 #ifdef DEBUG_VERBOSE
2927 fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2929 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2932 #ifndef NO_RICE_SEARCH
2933 if(rice_parameter_search_dist) {
2934 if(rice_parameter < rice_parameter_search_dist)
2935 min_rice_parameter = 0;
2937 min_rice_parameter = rice_parameter - rice_parameter_search_dist;
2938 max_rice_parameter = rice_parameter + rice_parameter_search_dist;
2939 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2940 #ifdef DEBUG_VERBOSE
2941 fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
2943 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
2947 min_rice_parameter = max_rice_parameter = rice_parameter;
2949 best_partition_bits = 0xffffffff;
2950 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
2952 #ifdef VARIABLE_RICE_BITS
2953 #ifdef FLAC__SYMMETRIC_RICE
2954 partition_bits = (2+rice_parameter) * partition_samples;
2956 const unsigned rice_parameter_estimate = rice_parameter-1;
2957 partition_bits = (1+rice_parameter) * partition_samples;
2962 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2963 save_residual_sample = residual_sample;
2964 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
2965 #ifdef VARIABLE_RICE_BITS
2966 #ifdef FLAC__SYMMETRIC_RICE
2967 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter);
2969 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
2972 partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
2975 #ifndef NO_RICE_SEARCH
2976 if(rice_parameter != max_rice_parameter)
2977 residual_sample = save_residual_sample;
2978 if(partition_bits < best_partition_bits) {
2979 best_rice_parameter = rice_parameter;
2980 best_partition_bits = partition_bits;
2984 if(search_for_escapes) {
2985 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;
2986 if(flat_bits <= best_partition_bits) {
2987 raw_bits[partition] = raw_bits_per_partition[partition];
2988 best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2989 best_partition_bits = flat_bits;
2992 parameters[partition] = best_rice_parameter;
2993 bits_ += best_partition_bits;
3001 unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples)
3006 for(i = 0; i < samples && !(x&1); i++)
3013 for(shift = 0; !(x&1); shift++)
3018 for(i = 0; i < samples; i++)
3019 signal[i] >>= shift;
3025 void append_to_verify_fifo_(verify_input_fifo *fifo, const FLAC__int32 * const input[], unsigned input_offset, unsigned channels, unsigned wide_samples)
3029 for(channel = 0; channel < channels; channel++)
3030 memcpy(&fifo->data[channel][fifo->tail], &input[channel][input_offset], sizeof(FLAC__int32) * wide_samples);
3032 fifo->tail += wide_samples;
3034 FLAC__ASSERT(fifo->tail <= fifo->size);
3037 void append_to_verify_fifo_interleaved_(verify_input_fifo *fifo, const FLAC__int32 input[], unsigned input_offset, unsigned channels, unsigned wide_samples)
3040 unsigned sample, wide_sample;
3041 unsigned tail = fifo->tail;
3043 sample = input_offset * channels;
3044 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++) {
3045 for(channel = 0; channel < channels; channel++)
3046 fifo->data[channel][tail] = input[sample++];
3051 FLAC__ASSERT(fifo->tail <= fifo->size);
3054 FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
3056 FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data;
3057 const unsigned encoded_bytes = encoder->private_->verify.output.bytes;
3060 if(encoder->private_->verify.needs_magic_hack) {
3061 FLAC__ASSERT(*bytes >= FLAC__STREAM_SYNC_LENGTH);
3062 *bytes = FLAC__STREAM_SYNC_LENGTH;
3063 memcpy(buffer, FLAC__STREAM_SYNC_STRING, *bytes);
3064 encoder->private_->verify.needs_magic_hack = false;
3067 if(encoded_bytes == 0) {
3069 * If we get here, a FIFO underflow has occurred,
3070 * which means there is a bug somewhere.
3073 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
3075 else if(encoded_bytes < *bytes)
3076 *bytes = encoded_bytes;
3077 memcpy(buffer, encoder->private_->verify.output.data, *bytes);
3078 encoder->private_->verify.output.data += *bytes;
3079 encoder->private_->verify.output.bytes -= *bytes;
3082 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
3085 FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
3087 FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder *)client_data;
3089 const unsigned channels = FLAC__stream_decoder_get_channels(decoder);
3090 const unsigned blocksize = frame->header.blocksize;
3091 const unsigned bytes_per_block = sizeof(FLAC__int32) * blocksize;
3093 for(channel = 0; channel < channels; channel++) {
3094 if(0 != memcmp(buffer[channel], encoder->private_->verify.input_fifo.data[channel], bytes_per_block)) {
3095 unsigned i, sample = 0;
3096 FLAC__int32 expect = 0, got = 0;
3098 for(i = 0; i < blocksize; i++) {
3099 if(buffer[channel][i] != encoder->private_->verify.input_fifo.data[channel][i]) {
3101 expect = (FLAC__int32)encoder->private_->verify.input_fifo.data[channel][i];
3102 got = (FLAC__int32)buffer[channel][i];
3106 FLAC__ASSERT(i < blocksize);
3107 FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3108 encoder->private_->verify.error_stats.absolute_sample = frame->header.number.sample_number + sample;
3109 encoder->private_->verify.error_stats.frame_number = (unsigned)(frame->header.number.sample_number / blocksize);
3110 encoder->private_->verify.error_stats.channel = channel;
3111 encoder->private_->verify.error_stats.sample = sample;
3112 encoder->private_->verify.error_stats.expected = expect;
3113 encoder->private_->verify.error_stats.got = got;
3114 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA;
3115 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
3118 /* dequeue the frame from the fifo */
3119 for(channel = 0; channel < channels; channel++) {
3120 memmove(&encoder->private_->verify.input_fifo.data[channel][0], &encoder->private_->verify.input_fifo.data[channel][blocksize], encoder->private_->verify.input_fifo.tail - blocksize);
3122 encoder->private_->verify.input_fifo.tail -= blocksize;
3123 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
3126 void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
3128 (void)decoder, (void)metadata, (void)client_data;
3131 void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
3133 FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data;
3134 (void)decoder, (void)status;
3135 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;