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.
21 #include <stdlib.h> /* for malloc() */
22 #include <string.h> /* for memcpy() */
23 #include "FLAC/assert.h"
24 #include "FLAC/seek_table.h"
25 #include "protected/stream_encoder.h"
26 #include "private/bitbuffer.h"
27 #include "private/bitmath.h"
28 #include "private/crc.h"
29 #include "private/cpu.h"
30 #include "private/stream_encoder_framing.h"
31 #include "private/fixed.h"
32 #include "private/lpc.h"
33 #include "private/md5.h"
34 #include "private/memory.h"
39 #define min(x,y) ((x)<(y)?(x):(y))
44 #define max(x,y) ((x)>(y)?(x):(y))
46 /***********************************************************************
48 * Private class method prototypes
50 ***********************************************************************/
52 static FLAC__bool stream_encoder_resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size);
53 static FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame);
54 static FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame);
55 static FLAC__bool stream_encoder_process_subframe_(FLAC__StreamEncoder *encoder, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool verbatim_only, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__int32 integer_signal[], const FLAC__real real_signal[], FLAC__Subframe *subframe[2], FLAC__int32 *residual[2], unsigned *best_subframe, unsigned *best_bits);
56 static FLAC__bool stream_encoder_add_subframe_(FLAC__StreamEncoder *encoder, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__Subframe *subframe, FLAC__BitBuffer *frame);
57 static unsigned stream_encoder_evaluate_constant_subframe_(const FLAC__int32 signal, unsigned subframe_bps, FLAC__Subframe *subframe);
58 static unsigned stream_encoder_evaluate_fixed_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe);
59 static unsigned stream_encoder_evaluate_lpc_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], const FLAC__real lp_coeff[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned qlp_coeff_precision, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe);
60 static unsigned stream_encoder_evaluate_verbatim_subframe_(const FLAC__int32 signal[], unsigned blocksize, unsigned subframe_bps, FLAC__Subframe *subframe);
61 static unsigned stream_encoder_find_best_partition_order_(struct FLAC__StreamEncoderPrivate *private_, const FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, unsigned *best_partition_order, unsigned best_parameters[], unsigned best_raw_bits[]);
62 static void stream_encoder_precompute_partition_info_sums_(const FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order);
63 static void stream_encoder_precompute_partition_info_escapes_(const FLAC__int32 residual[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order);
64 #ifdef DONT_ESTIMATE_RICE_BITS
65 static FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits);
66 static FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__int32 residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits);
68 static FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits);
69 static FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__uint32 abs_residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits);
71 static unsigned stream_encoder_get_wasted_bits_(FLAC__int32 signal[], unsigned samples);
73 /***********************************************************************
77 ***********************************************************************/
79 typedef struct FLAC__StreamEncoderPrivate {
80 unsigned input_capacity; /* current size (in samples) of the signal and residual buffers */
81 FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS]; /* the integer version of the input signal */
82 FLAC__int32 *integer_signal_mid_side[2]; /* the integer version of the mid-side input signal (stereo only) */
83 FLAC__real *real_signal[FLAC__MAX_CHANNELS]; /* the floating-point version of the input signal */
84 FLAC__real *real_signal_mid_side[2]; /* the floating-point version of the mid-side input signal (stereo only) */
85 unsigned subframe_bps[FLAC__MAX_CHANNELS]; /* the effective bits per sample of the input signal (stream bps - wasted bits) */
86 unsigned subframe_bps_mid_side[2]; /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */
87 FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */
88 FLAC__int32 *residual_workspace_mid_side[2][2];
89 FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2];
90 FLAC__Subframe subframe_workspace_mid_side[2][2];
91 FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2];
92 FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2];
93 unsigned best_subframe[FLAC__MAX_CHANNELS]; /* index into the above workspaces */
94 unsigned best_subframe_mid_side[2];
95 unsigned best_subframe_bits[FLAC__MAX_CHANNELS]; /* size in bits of the best subframe for each channel */
96 unsigned best_subframe_bits_mid_side[2];
97 FLAC__uint32 *abs_residual; /* workspace where abs(candidate residual) is stored */
98 FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */
99 unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */
100 FLAC__BitBuffer *frame; /* the current frame being worked on */
101 double loose_mid_side_stereo_frames_exact; /* exact number of frames the encoder will use before trying both independent and mid/side frames again */
102 unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
103 unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */
104 FLAC__ChannelAssignment last_channel_assignment;
105 FLAC__StreamMetaData metadata;
106 unsigned current_sample_number;
107 unsigned current_frame_number;
108 struct MD5Context md5context;
109 FLAC__CPUInfo cpuinfo;
110 unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__real residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
111 void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
112 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[]);
113 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[]);
114 FLAC__bool use_wide_by_block; /* use slow 64-bit versions of some functions because of the block size */
115 FLAC__bool use_wide_by_partition; /* use slow 64-bit versions of some functions because of the min partition order and blocksize */
116 FLAC__bool use_wide_by_order; /* use slow 64-bit versions of some functions because of the lpc order */
117 FLAC__bool precompute_partition_sums; /* our initial guess as to whether precomputing the partitions sums will be a speed improvement */
118 FLAC__StreamEncoderWriteStatus (*write_callback)(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
119 void (*metadata_callback)(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
121 /* unaligned (original) pointers to allocated data */
122 FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS];
123 FLAC__int32 *integer_signal_mid_side_unaligned[2];
124 FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS];
125 FLAC__real *real_signal_mid_side_unaligned[2];
126 FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2];
127 FLAC__int32 *residual_workspace_mid_side_unaligned[2][2];
128 FLAC__uint32 *abs_residual_unaligned;
129 FLAC__uint64 *abs_residual_partition_sums_unaligned;
130 unsigned *raw_bits_per_partition_unaligned;
132 * These fields have been moved here from private function local
133 * declarations merely to save stack space during encoding.
135 FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from stream_encoder_process_subframe_() */
136 unsigned parameters[2][1 << FLAC__MAX_RICE_PARTITION_ORDER], raw_bits[2][1 << FLAC__MAX_RICE_PARTITION_ORDER]; /* from stream_encoder_find_best_partition_order_() */
137 } FLAC__StreamEncoderPrivate;
139 /***********************************************************************
141 * Public static class data
143 ***********************************************************************/
145 const char *FLAC__StreamEncoderStateString[] = {
146 "FLAC__STREAM_ENCODER_OK",
147 "FLAC__STREAM_ENCODER_INVALID_CALLBACK",
148 "FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS",
149 "FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE",
150 "FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE",
151 "FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE",
152 "FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION",
153 "FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH",
154 "FLAC__STREAM_ENCODER_MID_SIDE_SAMPLE_SIZE_MISMATCH",
155 "FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE",
156 "FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER",
157 "FLAC__STREAM_ENCODER_NOT_STREAMABLE",
158 "FLAC__STREAM_ENCODER_FRAMING_ERROR",
159 "FLAC__STREAM_ENCODER_INVALID_SEEK_TABLE",
160 "FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING",
161 "FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING",
162 "FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR",
163 "FLAC__STREAM_ENCODER_ALREADY_INITIALIZED",
164 "FLAC__STREAM_ENCODER_UNINITIALIZED"
167 const char *FLAC__StreamEncoderWriteStatusString[] = {
168 "FLAC__STREAM_ENCODER_WRITE_OK",
169 "FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR"
172 /***********************************************************************
174 * Class constructor/destructor
176 ***********************************************************************/
177 FLAC__StreamEncoder *FLAC__stream_encoder_new()
179 FLAC__StreamEncoder *encoder;
181 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
183 encoder = (FLAC__StreamEncoder*)malloc(sizeof(FLAC__StreamEncoder));
187 encoder->protected_ = (FLAC__StreamEncoderProtected*)malloc(sizeof(FLAC__StreamEncoderProtected));
188 if(encoder->protected_ == 0) {
192 encoder->private_ = (FLAC__StreamEncoderPrivate*)malloc(sizeof(FLAC__StreamEncoderPrivate));
193 if(encoder->private_ == 0) {
194 free(encoder->protected_);
198 encoder->private_->frame = FLAC__bitbuffer_new();
199 if(encoder->private_->frame == 0) {
200 free(encoder->private_);
201 free(encoder->protected_);
206 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
208 encoder->protected_->streamable_subset = true;
209 encoder->protected_->do_mid_side_stereo = false;
210 encoder->protected_->loose_mid_side_stereo = false;
211 encoder->protected_->channels = 2;
212 encoder->protected_->bits_per_sample = 16;
213 encoder->protected_->sample_rate = 44100;
214 encoder->protected_->blocksize = 1152;
215 encoder->protected_->max_lpc_order = 0;
216 encoder->protected_->qlp_coeff_precision = 0;
217 encoder->protected_->do_qlp_coeff_prec_search = false;
218 encoder->protected_->do_exhaustive_model_search = false;
219 encoder->protected_->do_escape_coding = false;
220 encoder->protected_->min_residual_partition_order = 0;
221 encoder->protected_->max_residual_partition_order = 0;
222 encoder->protected_->rice_parameter_search_dist = 0;
223 encoder->protected_->total_samples_estimate = 0;
224 encoder->protected_->seek_table = 0;
225 encoder->protected_->padding = -1;
226 encoder->protected_->last_metadata_is_last = true;
228 encoder->private_->write_callback = 0;
229 encoder->private_->metadata_callback = 0;
230 encoder->private_->client_data = 0;
235 void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
237 FLAC__ASSERT(encoder != 0);
238 FLAC__ASSERT(encoder->protected_ != 0);
239 FLAC__ASSERT(encoder->private_ != 0);
240 FLAC__ASSERT(encoder->private_->frame != 0);
242 FLAC__bitbuffer_delete(encoder->private_->frame);
243 free(encoder->private_);
244 free(encoder->protected_);
248 /***********************************************************************
250 * Public class methods
252 ***********************************************************************/
254 FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
257 FLAC__StreamMetaData padding_block;
258 FLAC__StreamMetaData seek_table_block;
260 FLAC__ASSERT(encoder != 0);
262 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
263 return encoder->protected_->state = FLAC__STREAM_ENCODER_ALREADY_INITIALIZED;
265 encoder->protected_->state = FLAC__STREAM_ENCODER_OK;
267 if(0 == encoder->private_->write_callback || 0 == encoder->private_->metadata_callback)
268 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_CALLBACK;
270 if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS)
271 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS;
273 if(encoder->protected_->do_mid_side_stereo && encoder->protected_->channels != 2)
274 return encoder->protected_->state = FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH;
276 if(encoder->protected_->loose_mid_side_stereo && !encoder->protected_->do_mid_side_stereo)
277 return encoder->protected_->state = FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE;
279 if(encoder->protected_->bits_per_sample >= 32)
280 encoder->protected_->do_mid_side_stereo = false; /* since we do 32-bit math, the side channel would have 33 bps and overflow */
282 if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE)
283 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE;
285 if(!FLAC__format_is_valid_sample_rate(encoder->protected_->sample_rate))
286 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE;
288 if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE)
289 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE;
291 if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order)
292 return encoder->protected_->state = FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER;
294 if(encoder->protected_->qlp_coeff_precision == 0) {
295 if(encoder->protected_->bits_per_sample < 16) {
296 /* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */
297 /* @@@ until then we'll make a guess */
298 encoder->protected_->qlp_coeff_precision = max(5, 2 + encoder->protected_->bits_per_sample / 2);
300 else if(encoder->protected_->bits_per_sample == 16) {
301 if(encoder->protected_->blocksize <= 192)
302 encoder->protected_->qlp_coeff_precision = 7;
303 else if(encoder->protected_->blocksize <= 384)
304 encoder->protected_->qlp_coeff_precision = 8;
305 else if(encoder->protected_->blocksize <= 576)
306 encoder->protected_->qlp_coeff_precision = 9;
307 else if(encoder->protected_->blocksize <= 1152)
308 encoder->protected_->qlp_coeff_precision = 10;
309 else if(encoder->protected_->blocksize <= 2304)
310 encoder->protected_->qlp_coeff_precision = 11;
311 else if(encoder->protected_->blocksize <= 4608)
312 encoder->protected_->qlp_coeff_precision = 12;
314 encoder->protected_->qlp_coeff_precision = 13;
317 encoder->protected_->qlp_coeff_precision = min(13, 8*sizeof(FLAC__int32) - encoder->protected_->bits_per_sample - 1 - 2); /* @@@ -2 to keep things 32-bit safe */
320 else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision + encoder->protected_->bits_per_sample >= 8*sizeof(FLAC__uint32) || encoder->protected_->qlp_coeff_precision >= (1u<<FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
321 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION;
323 if(encoder->protected_->streamable_subset) {
324 /*@@@ add check for blocksize here */
325 if(encoder->protected_->bits_per_sample != 8 && encoder->protected_->bits_per_sample != 12 && encoder->protected_->bits_per_sample != 16 && encoder->protected_->bits_per_sample != 20 && encoder->protected_->bits_per_sample != 24)
326 return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
327 if(encoder->protected_->sample_rate > 655350)
328 return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
331 if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
332 encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1;
333 if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order)
334 encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order;
336 encoder->private_->input_capacity = 0;
337 for(i = 0; i < encoder->protected_->channels; i++) {
338 encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0;
339 encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0;
341 for(i = 0; i < 2; i++) {
342 encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0;
343 encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0;
345 for(i = 0; i < encoder->protected_->channels; i++) {
346 encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0;
347 encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0;
348 encoder->private_->best_subframe[i] = 0;
350 for(i = 0; i < 2; i++) {
351 encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0;
352 encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0;
353 encoder->private_->best_subframe_mid_side[i] = 0;
355 for(i = 0; i < encoder->protected_->channels; i++) {
356 encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0];
357 encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1];
359 for(i = 0; i < 2; i++) {
360 encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0];
361 encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1];
363 encoder->private_->abs_residual_unaligned = encoder->private_->abs_residual = 0;
364 encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0;
365 encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0;
366 encoder->private_->loose_mid_side_stereo_frames_exact = (double)encoder->protected_->sample_rate * 0.4 / (double)encoder->protected_->blocksize;
367 encoder->private_->loose_mid_side_stereo_frames = (unsigned)(encoder->private_->loose_mid_side_stereo_frames_exact + 0.5);
368 if(encoder->private_->loose_mid_side_stereo_frames == 0)
369 encoder->private_->loose_mid_side_stereo_frames = 1;
370 encoder->private_->loose_mid_side_stereo_frame_count = 0;
371 encoder->private_->current_sample_number = 0;
372 encoder->private_->current_frame_number = 0;
374 encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30);
375 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? */
376 encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */
379 * get the CPU info and set the function pointers
381 FLAC__cpu_info(&encoder->private_->cpuinfo);
382 /* first default to the non-asm routines */
383 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation;
384 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor;
385 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients;
386 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients;
387 /* now override with asm where appropriate */
389 if(encoder->private_->cpuinfo.use_asm) {
390 #ifdef FLAC__CPU_IA32
391 FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
392 #ifdef FLAC__HAS_NASM
393 if(0 && encoder->private_->cpuinfo.data.ia32.sse) {
394 if(encoder->protected_->max_lpc_order < 4)
395 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
396 else if(encoder->protected_->max_lpc_order < 8)
397 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8;
398 else if(encoder->protected_->max_lpc_order < 12)
399 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12;
401 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
403 else if(encoder->private_->cpuinfo.data.ia32._3dnow)
404 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
406 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
407 if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov)
408 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov;
409 if(encoder->private_->cpuinfo.data.ia32.mmx) {
410 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
411 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx;
414 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
415 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
421 /* finally override based on wide-ness if necessary */
422 if(encoder->private_->use_wide_by_block) {
423 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide;
426 /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
427 encoder->private_->precompute_partition_sums = (encoder->protected_->max_residual_partition_order > encoder->protected_->min_residual_partition_order) || encoder->protected_->do_escape_coding;
429 if(!stream_encoder_resize_buffers_(encoder, encoder->protected_->blocksize)) {
430 /* the above function sets the state for us in case of an error */
431 return encoder->protected_->state;
434 if(!FLAC__bitbuffer_init(encoder->private_->frame))
435 return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
438 * write the stream header
440 if(!FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN))
441 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
443 encoder->private_->metadata.type = FLAC__METADATA_TYPE_STREAMINFO;
444 encoder->private_->metadata.is_last = (encoder->protected_->seek_table == 0 && encoder->protected_->padding < 0 && encoder->protected_->last_metadata_is_last);
445 encoder->private_->metadata.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
446 encoder->private_->metadata.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */
447 encoder->private_->metadata.data.stream_info.max_blocksize = encoder->protected_->blocksize;
448 encoder->private_->metadata.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */
449 encoder->private_->metadata.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */
450 encoder->private_->metadata.data.stream_info.sample_rate = encoder->protected_->sample_rate;
451 encoder->private_->metadata.data.stream_info.channels = encoder->protected_->channels;
452 encoder->private_->metadata.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample;
453 encoder->private_->metadata.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
454 memset(encoder->private_->metadata.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
455 MD5Init(&encoder->private_->md5context);
456 if(!FLAC__add_metadata_block(&encoder->private_->metadata, encoder->private_->frame))
457 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
459 if(0 != encoder->protected_->seek_table) {
460 if(!FLAC__seek_table_is_valid(encoder->protected_->seek_table))
461 return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_SEEK_TABLE;
462 seek_table_block.type = FLAC__METADATA_TYPE_SEEKTABLE;
463 seek_table_block.is_last = (encoder->protected_->padding < 0 && encoder->protected_->last_metadata_is_last);
464 seek_table_block.length = encoder->protected_->seek_table->num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
465 seek_table_block.data.seek_table = *encoder->protected_->seek_table;
466 if(!FLAC__add_metadata_block(&seek_table_block, encoder->private_->frame))
467 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
470 /* add a PADDING block if requested */
471 if(encoder->protected_->padding >= 0) {
472 padding_block.type = FLAC__METADATA_TYPE_PADDING;
473 padding_block.is_last = encoder->protected_->last_metadata_is_last;
474 padding_block.length = (unsigned)encoder->protected_->padding;
475 if(!FLAC__add_metadata_block(&padding_block, encoder->private_->frame))
476 return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
479 FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
484 FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
486 if(encoder->private_->write_callback(encoder, buffer, bytes, 0, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK)
487 return encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
489 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
492 /* now that the metadata block is written, we can init this to an absurdly-high value... */
493 encoder->private_->metadata.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
494 /* ... and clear this to 0 */
495 encoder->private_->metadata.data.stream_info.total_samples = 0;
497 return encoder->protected_->state;
500 void FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
504 FLAC__ASSERT(encoder != 0);
505 if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
507 if(encoder->private_->current_sample_number != 0) {
508 encoder->protected_->blocksize = encoder->private_->current_sample_number;
509 stream_encoder_process_frame_(encoder, true); /* true => is last frame */
511 MD5Final(encoder->private_->metadata.data.stream_info.md5sum, &encoder->private_->md5context);
512 encoder->private_->metadata_callback(encoder, &encoder->private_->metadata, encoder->private_->client_data);
513 for(i = 0; i < encoder->protected_->channels; i++) {
514 if(encoder->private_->integer_signal_unaligned[i] != 0) {
515 free(encoder->private_->integer_signal_unaligned[i]);
516 encoder->private_->integer_signal_unaligned[i] = 0;
518 if(encoder->private_->real_signal_unaligned[i] != 0) {
519 free(encoder->private_->real_signal_unaligned[i]);
520 encoder->private_->real_signal_unaligned[i] = 0;
523 for(i = 0; i < 2; i++) {
524 if(encoder->private_->integer_signal_mid_side_unaligned[i] != 0) {
525 free(encoder->private_->integer_signal_mid_side_unaligned[i]);
526 encoder->private_->integer_signal_mid_side_unaligned[i] = 0;
528 if(encoder->private_->real_signal_mid_side_unaligned[i] != 0) {
529 free(encoder->private_->real_signal_mid_side_unaligned[i]);
530 encoder->private_->real_signal_mid_side_unaligned[i] = 0;
533 for(channel = 0; channel < encoder->protected_->channels; channel++) {
534 for(i = 0; i < 2; i++) {
535 if(encoder->private_->residual_workspace_unaligned[channel][i] != 0) {
536 free(encoder->private_->residual_workspace_unaligned[channel][i]);
537 encoder->private_->residual_workspace_unaligned[channel][i] = 0;
541 for(channel = 0; channel < 2; channel++) {
542 for(i = 0; i < 2; i++) {
543 if(encoder->private_->residual_workspace_mid_side_unaligned[channel][i] != 0) {
544 free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]);
545 encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0;
549 if(encoder->private_->abs_residual_unaligned != 0) {
550 free(encoder->private_->abs_residual_unaligned);
551 encoder->private_->abs_residual_unaligned = 0;
553 if(encoder->private_->abs_residual_partition_sums_unaligned != 0) {
554 free(encoder->private_->abs_residual_partition_sums_unaligned);
555 encoder->private_->abs_residual_partition_sums_unaligned = 0;
557 if(encoder->private_->raw_bits_per_partition_unaligned != 0) {
558 free(encoder->private_->raw_bits_per_partition_unaligned);
559 encoder->private_->raw_bits_per_partition_unaligned = 0;
561 FLAC__bitbuffer_free(encoder->private_->frame);
563 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
566 FLAC__bool FLAC__stream_encoder_set_streamable_subset(const FLAC__StreamEncoder *encoder, FLAC__bool value)
568 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
570 encoder->protected_->streamable_subset = value;
574 FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(const FLAC__StreamEncoder *encoder, FLAC__bool value)
576 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
578 encoder->protected_->do_mid_side_stereo = value;
582 FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder, FLAC__bool value)
584 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
586 encoder->protected_->loose_mid_side_stereo = value;
590 FLAC__bool FLAC__stream_encoder_set_channels(const FLAC__StreamEncoder *encoder, unsigned value)
592 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
594 encoder->protected_->channels = value;
598 FLAC__bool FLAC__stream_encoder_set_bits_per_sample(const FLAC__StreamEncoder *encoder, unsigned value)
600 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
602 encoder->protected_->bits_per_sample = value;
606 FLAC__bool FLAC__stream_encoder_set_sample_rate(const FLAC__StreamEncoder *encoder, unsigned value)
608 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
610 encoder->protected_->sample_rate = value;
614 FLAC__bool FLAC__stream_encoder_set_blocksize(const FLAC__StreamEncoder *encoder, unsigned value)
616 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
618 encoder->protected_->blocksize = value;
622 FLAC__bool FLAC__stream_encoder_set_max_lpc_order(const FLAC__StreamEncoder *encoder, unsigned value)
624 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
626 encoder->protected_->max_lpc_order = value;
630 FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(const FLAC__StreamEncoder *encoder, unsigned value)
632 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
634 encoder->protected_->qlp_coeff_precision = value;
638 FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder, FLAC__bool value)
640 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
642 encoder->protected_->do_qlp_coeff_prec_search = value;
646 FLAC__bool FLAC__stream_encoder_set_do_escape_coding(const FLAC__StreamEncoder *encoder, FLAC__bool value)
648 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
650 encoder->protected_->do_escape_coding = value;
654 FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder, FLAC__bool value)
656 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
658 encoder->protected_->do_exhaustive_model_search = value;
662 FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(const FLAC__StreamEncoder *encoder, unsigned value)
664 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
666 encoder->protected_->min_residual_partition_order = value;
670 FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(const FLAC__StreamEncoder *encoder, unsigned value)
672 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
674 encoder->protected_->max_residual_partition_order = value;
678 FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder, unsigned value)
680 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
682 encoder->protected_->rice_parameter_search_dist = value;
686 FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(const FLAC__StreamEncoder *encoder, FLAC__uint64 value)
688 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
690 encoder->protected_->total_samples_estimate = value;
694 FLAC__bool FLAC__stream_encoder_set_seek_table(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData_SeekTable *value)
696 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
698 encoder->protected_->seek_table = value;
702 FLAC__bool FLAC__stream_encoder_set_padding(const FLAC__StreamEncoder *encoder, int value)
704 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
706 encoder->protected_->padding = value;
710 FLAC__bool FLAC__stream_encoder_set_last_metadata_is_last(const FLAC__StreamEncoder *encoder, FLAC__bool value)
712 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
714 encoder->protected_->last_metadata_is_last = value;
718 FLAC__bool FLAC__stream_encoder_set_write_callback(const FLAC__StreamEncoder *encoder, FLAC__StreamEncoderWriteStatus (*value)(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data))
720 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
722 encoder->private_->write_callback = value;
726 FLAC__bool FLAC__stream_encoder_set_metadata_callback(const FLAC__StreamEncoder *encoder, void (*value)(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data))
728 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
730 encoder->private_->metadata_callback = value;
734 FLAC__bool FLAC__stream_encoder_set_client_data(const FLAC__StreamEncoder *encoder, void *value)
736 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
738 encoder->private_->client_data = value;
742 FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
744 return encoder->protected_->state;
747 FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder)
749 return encoder->protected_->streamable_subset;
752 FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder)
754 return encoder->protected_->do_mid_side_stereo;
757 FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder)
759 return encoder->protected_->loose_mid_side_stereo;
762 unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder)
764 return encoder->protected_->channels;
767 unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder)
769 return encoder->protected_->bits_per_sample;
772 unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder)
774 return encoder->protected_->sample_rate;
777 unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder)
779 return encoder->protected_->blocksize;
782 unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder)
784 return encoder->protected_->max_lpc_order;
787 unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder)
789 return encoder->protected_->qlp_coeff_precision;
792 FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder)
794 return encoder->protected_->do_qlp_coeff_prec_search;
797 FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder)
799 return encoder->protected_->do_escape_coding;
802 FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder)
804 return encoder->protected_->do_exhaustive_model_search;
807 unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder)
809 return encoder->protected_->min_residual_partition_order;
812 unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder)
814 return encoder->protected_->max_residual_partition_order;
817 unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder)
819 return encoder->protected_->rice_parameter_search_dist;
822 FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 *buf[], unsigned samples)
824 unsigned i, j, channel;
825 FLAC__int32 x, mid, side;
826 const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
828 FLAC__ASSERT(encoder != 0);
829 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
832 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
834 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
835 x = mid = side = buf[0][j];
836 encoder->private_->integer_signal[0][i] = x;
837 encoder->private_->real_signal[0][i] = (FLAC__real)x;
839 encoder->private_->integer_signal[1][i] = x;
840 encoder->private_->real_signal[1][i] = (FLAC__real)x;
843 mid >>= 1; /* NOTE: not the same as 'mid = (buf[0][j] + buf[1][j]) / 2' ! */
844 encoder->private_->integer_signal_mid_side[1][i] = side;
845 encoder->private_->integer_signal_mid_side[0][i] = mid;
846 encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
847 encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
848 encoder->private_->current_sample_number++;
851 if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
854 } while(j < samples);
858 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
859 for(channel = 0; channel < channels; channel++) {
861 encoder->private_->integer_signal[channel][i] = x;
862 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
864 encoder->private_->current_sample_number++;
867 if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
870 } while(j < samples);
876 /* 'samples' is channel-wide samples, e.g. for 1 second at 44100Hz, 'samples' = 44100 regardless of the number of channels */
877 FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buf[], unsigned samples)
879 unsigned i, j, k, channel;
880 FLAC__int32 x, mid, side;
881 const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
883 FLAC__ASSERT(encoder != 0);
884 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
887 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
889 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
890 x = mid = side = buf[k++];
891 encoder->private_->integer_signal[0][i] = x;
892 encoder->private_->real_signal[0][i] = (FLAC__real)x;
894 encoder->private_->integer_signal[1][i] = x;
895 encoder->private_->real_signal[1][i] = (FLAC__real)x;
898 mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
899 encoder->private_->integer_signal_mid_side[1][i] = side;
900 encoder->private_->integer_signal_mid_side[0][i] = mid;
901 encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
902 encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
903 encoder->private_->current_sample_number++;
906 if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
909 } while(j < samples);
913 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
914 for(channel = 0; channel < channels; channel++) {
916 encoder->private_->integer_signal[channel][i] = x;
917 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
919 encoder->private_->current_sample_number++;
922 if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
925 } while(j < samples);
931 FLAC__bool stream_encoder_resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size)
936 FLAC__ASSERT(new_size > 0);
937 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
938 FLAC__ASSERT(encoder->private_->current_sample_number == 0);
940 /* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */
941 if(new_size <= encoder->private_->input_capacity)
946 /* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx() requires that the input arrays (in our case the integer signals) have a buffer of up to 3 zeroes in front (at negative indices) for alignment purposes; we use 4 to keep the data well-aligned. */
948 for(i = 0; ok && i < encoder->protected_->channels; i++) {
949 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]);
950 ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]);
951 memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4);
952 encoder->private_->integer_signal[i] += 4;
954 for(i = 0; ok && i < 2; i++) {
955 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]);
956 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]);
957 memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4);
958 encoder->private_->integer_signal_mid_side[i] += 4;
960 for(channel = 0; ok && channel < encoder->protected_->channels; channel++) {
961 for(i = 0; ok && i < 2; i++) {
962 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]);
965 for(channel = 0; ok && channel < 2; channel++) {
966 for(i = 0; ok && i < 2; i++) {
967 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]);
970 ok = ok && FLAC__memory_alloc_aligned_uint32_array(new_size, &encoder->private_->abs_residual_unaligned, &encoder->private_->abs_residual);
971 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 */
972 ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_size * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums);
973 if(encoder->protected_->do_escape_coding)
974 ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_size * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition);
977 encoder->private_->input_capacity = new_size;
979 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
984 /***********************************************************************
986 * Private class methods
988 ***********************************************************************/
990 FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
992 const FLAC__byte *buffer;
995 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
998 * Accumulate raw signal to the MD5 signature
1000 /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
1001 if(!FLAC__MD5Accumulate(&encoder->private_->md5context, encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) {
1002 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1007 * Process the frame header and subframes into the frame bitbuffer
1009 if(!stream_encoder_process_subframes_(encoder, is_last_frame)) {
1010 /* the above function sets the state for us in case of an error */
1015 * Zero-pad the frame to a byte_boundary
1017 if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(encoder->private_->frame)) {
1018 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1023 * CRC-16 the whole thing
1025 FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
1026 FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__bitbuffer_get_write_crc16(encoder->private_->frame), FLAC__FRAME_FOOTER_CRC_LEN);
1031 FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
1032 if(encoder->private_->write_callback(encoder, buffer, bytes, encoder->protected_->blocksize, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK) {
1033 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
1036 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
1039 * Get ready for the next frame
1041 encoder->private_->current_sample_number = 0;
1042 encoder->private_->current_frame_number++;
1043 encoder->private_->metadata.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
1044 encoder->private_->metadata.data.stream_info.min_framesize = min(bytes, encoder->private_->metadata.data.stream_info.min_framesize);
1045 encoder->private_->metadata.data.stream_info.max_framesize = max(bytes, encoder->private_->metadata.data.stream_info.max_framesize);
1050 FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
1052 FLAC__FrameHeader frame_header;
1053 unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order;
1054 FLAC__bool do_independent, do_mid_side, precompute_partition_sums;
1057 * Calculate the min,max Rice partition orders
1060 max_partition_order = 0;
1063 unsigned limit = 0, b = encoder->protected_->blocksize;
1068 max_partition_order = min(encoder->protected_->max_residual_partition_order, limit);
1070 min_partition_order = min(min_partition_order, max_partition_order);
1072 precompute_partition_sums = encoder->private_->precompute_partition_sums && ((max_partition_order > min_partition_order) || encoder->protected_->do_escape_coding);
1077 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1078 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1081 frame_header.blocksize = encoder->protected_->blocksize;
1082 frame_header.sample_rate = encoder->protected_->sample_rate;
1083 frame_header.channels = encoder->protected_->channels;
1084 frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */
1085 frame_header.bits_per_sample = encoder->protected_->bits_per_sample;
1086 frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
1087 frame_header.number.frame_number = encoder->private_->current_frame_number;
1090 * Figure out what channel assignments to try
1092 if(encoder->protected_->do_mid_side_stereo) {
1093 if(encoder->protected_->loose_mid_side_stereo) {
1094 if(encoder->private_->loose_mid_side_stereo_frame_count == 0) {
1095 do_independent = true;
1099 do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT);
1100 do_mid_side = !do_independent;
1104 do_independent = true;
1109 do_independent = true;
1110 do_mid_side = false;
1113 FLAC__ASSERT(do_independent || do_mid_side);
1116 * Check for wasted bits; set effective bps for each subframe
1118 if(do_independent) {
1120 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1121 w = stream_encoder_get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
1122 encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w;
1123 encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w;
1128 FLAC__ASSERT(encoder->protected_->channels == 2);
1129 for(channel = 0; channel < 2; channel++) {
1130 w = stream_encoder_get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize);
1131 encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w;
1132 encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1);
1137 * First do a normal encoding pass of each independent channel
1139 if(do_independent) {
1140 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1141 if(!stream_encoder_process_subframe_(encoder, min_partition_order, max_partition_order, precompute_partition_sums, false, &frame_header, encoder->private_->subframe_bps[channel], encoder->private_->integer_signal[channel], encoder->private_->real_signal[channel], encoder->private_->subframe_workspace_ptr[channel], encoder->private_->residual_workspace[channel], encoder->private_->best_subframe+channel, encoder->private_->best_subframe_bits+channel))
1147 * Now do mid and side channels if requested
1150 FLAC__ASSERT(encoder->protected_->channels == 2);
1152 for(channel = 0; channel < 2; channel++) {
1153 if(!stream_encoder_process_subframe_(encoder, min_partition_order, max_partition_order, precompute_partition_sums, false, &frame_header, encoder->private_->subframe_bps_mid_side[channel], encoder->private_->integer_signal_mid_side[channel], encoder->private_->real_signal_mid_side[channel], encoder->private_->subframe_workspace_ptr_mid_side[channel], encoder->private_->residual_workspace_mid_side[channel], encoder->private_->best_subframe_mid_side+channel, encoder->private_->best_subframe_bits_mid_side+channel))
1159 * Compose the frame bitbuffer
1162 unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */
1163 FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */
1164 FLAC__ChannelAssignment channel_assignment;
1166 FLAC__ASSERT(encoder->protected_->channels == 2);
1168 if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) {
1169 channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE);
1172 unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */
1174 FLAC__ChannelAssignment ca;
1176 FLAC__ASSERT(do_independent && do_mid_side);
1178 /* We have to figure out which channel assignent results in the smallest frame */
1179 bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits [1];
1180 bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE ] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits_mid_side[1];
1181 bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits [1] + encoder->private_->best_subframe_bits_mid_side[1];
1182 bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1];
1184 for(channel_assignment = 0, min_bits = bits[0], ca = 1; ca <= 3; ca++) {
1185 if(bits[ca] < min_bits) {
1186 min_bits = bits[ca];
1187 channel_assignment = ca;
1192 frame_header.channel_assignment = channel_assignment;
1194 if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, encoder->private_->frame)) {
1195 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1199 switch(channel_assignment) {
1200 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1201 left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
1202 right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
1204 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1205 left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
1206 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1208 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1209 left_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1210 right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
1212 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1213 left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
1214 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1220 switch(channel_assignment) {
1221 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1222 left_bps = encoder->private_->subframe_bps [0];
1223 right_bps = encoder->private_->subframe_bps [1];
1225 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1226 left_bps = encoder->private_->subframe_bps [0];
1227 right_bps = encoder->private_->subframe_bps_mid_side[1];
1229 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1230 left_bps = encoder->private_->subframe_bps_mid_side[1];
1231 right_bps = encoder->private_->subframe_bps [1];
1233 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1234 left_bps = encoder->private_->subframe_bps_mid_side[0];
1235 right_bps = encoder->private_->subframe_bps_mid_side[1];
1241 /* note that encoder_add_subframe_ sets the state for us in case of an error */
1242 if(!stream_encoder_add_subframe_(encoder, &frame_header, left_bps , left_subframe , encoder->private_->frame))
1244 if(!stream_encoder_add_subframe_(encoder, &frame_header, right_bps, right_subframe, encoder->private_->frame))
1248 if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, encoder->private_->frame)) {
1249 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1253 for(channel = 0; channel < encoder->protected_->channels; channel++) {
1254 if(!stream_encoder_add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) {
1255 /* the above function sets the state for us in case of an error */
1261 if(encoder->protected_->loose_mid_side_stereo) {
1262 encoder->private_->loose_mid_side_stereo_frame_count++;
1263 if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames)
1264 encoder->private_->loose_mid_side_stereo_frame_count = 0;
1267 encoder->private_->last_channel_assignment = frame_header.channel_assignment;
1272 FLAC__bool stream_encoder_process_subframe_(FLAC__StreamEncoder *encoder, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool verbatim_only, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__int32 integer_signal[], const FLAC__real real_signal[], FLAC__Subframe *subframe[2], FLAC__int32 *residual[2], unsigned *best_subframe, unsigned *best_bits)
1274 FLAC__real fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
1275 FLAC__real lpc_residual_bits_per_sample;
1276 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 */
1277 FLAC__real lpc_error[FLAC__MAX_LPC_ORDER];
1278 unsigned min_lpc_order, max_lpc_order, lpc_order;
1279 unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order;
1280 unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision;
1281 unsigned rice_parameter;
1282 unsigned _candidate_bits, _best_bits;
1283 unsigned _best_subframe;
1285 /* verbatim subframe is the baseline against which we measure other compressed subframes */
1287 _best_bits = stream_encoder_evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
1289 if(!verbatim_only && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) {
1290 /* check for constant subframe */
1291 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);
1292 if(fixed_residual_bits_per_sample[1] == 0.0) {
1293 /* the above means integer_signal+FLAC__MAX_FIXED_ORDER is constant, now we just have to check the warmup samples */
1294 unsigned i, signal_is_constant = true;
1295 for(i = 1; i <= FLAC__MAX_FIXED_ORDER; i++) {
1296 if(integer_signal[0] != integer_signal[i]) {
1297 signal_is_constant = false;
1301 if(signal_is_constant) {
1302 _candidate_bits = stream_encoder_evaluate_constant_subframe_(integer_signal[0], subframe_bps, subframe[!_best_subframe]);
1303 if(_candidate_bits < _best_bits) {
1304 _best_subframe = !_best_subframe;
1305 _best_bits = _candidate_bits;
1311 if(encoder->protected_->do_exhaustive_model_search) {
1312 min_fixed_order = 0;
1313 max_fixed_order = FLAC__MAX_FIXED_ORDER;
1316 min_fixed_order = max_fixed_order = guess_fixed_order;
1318 for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) {
1319 if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__real)subframe_bps)
1320 continue; /* don't even try */
1321 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 */
1322 #ifndef FLAC__SYMMETRIC_RICE
1323 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
1325 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1326 #ifdef DEBUG_VERBOSE
1327 fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1329 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1331 _candidate_bits = stream_encoder_evaluate_fixed_subframe_(encoder, integer_signal, residual[!_best_subframe], encoder->private_->abs_residual, encoder->private_->abs_residual_partition_sums, encoder->private_->raw_bits_per_partition, frame_header->blocksize, subframe_bps, fixed_order, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, encoder->protected_->do_escape_coding, encoder->protected_->rice_parameter_search_dist, subframe[!_best_subframe]);
1332 if(_candidate_bits < _best_bits) {
1333 _best_subframe = !_best_subframe;
1334 _best_bits = _candidate_bits;
1339 if(encoder->protected_->max_lpc_order > 0) {
1340 if(encoder->protected_->max_lpc_order >= frame_header->blocksize)
1341 max_lpc_order = frame_header->blocksize-1;
1343 max_lpc_order = encoder->protected_->max_lpc_order;
1344 if(max_lpc_order > 0) {
1345 encoder->private_->local_lpc_compute_autocorrelation(real_signal, frame_header->blocksize, max_lpc_order+1, autoc);
1346 /* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */
1347 if(autoc[0] != 0.0) {
1348 FLAC__lpc_compute_lp_coefficients(autoc, max_lpc_order, encoder->private_->lp_coeff, lpc_error);
1349 if(encoder->protected_->do_exhaustive_model_search) {
1353 unsigned guess_lpc_order = FLAC__lpc_compute_best_order(lpc_error, max_lpc_order, frame_header->blocksize, subframe_bps);
1354 min_lpc_order = max_lpc_order = guess_lpc_order;
1356 if(encoder->protected_->do_qlp_coeff_prec_search) {
1357 min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
1358 max_qlp_coeff_precision = min(8*sizeof(FLAC__int32) - subframe_bps - 1 - 2, (1u<<FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN)-1); /* -2 to keep things 32-bit safe */
1361 min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision;
1363 for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) {
1364 lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order);
1365 if(lpc_residual_bits_per_sample >= (FLAC__real)subframe_bps)
1366 continue; /* don't even try */
1367 rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */
1368 #ifndef FLAC__SYMMETRIC_RICE
1369 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
1371 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1372 #ifdef DEBUG_VERBOSE
1373 fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1375 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1377 for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) {
1378 _candidate_bits = stream_encoder_evaluate_lpc_subframe_(encoder, integer_signal, residual[!_best_subframe], encoder->private_->abs_residual, encoder->private_->abs_residual_partition_sums, encoder->private_->raw_bits_per_partition, encoder->private_->lp_coeff[lpc_order-1], frame_header->blocksize, subframe_bps, lpc_order, qlp_coeff_precision, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, encoder->protected_->do_escape_coding, encoder->protected_->rice_parameter_search_dist, subframe[!_best_subframe]);
1379 if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */
1380 if(_candidate_bits < _best_bits) {
1381 _best_subframe = !_best_subframe;
1382 _best_bits = _candidate_bits;
1393 *best_subframe = _best_subframe;
1394 *best_bits = _best_bits;
1399 FLAC__bool stream_encoder_add_subframe_(FLAC__StreamEncoder *encoder, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__Subframe *subframe, FLAC__BitBuffer *frame)
1401 switch(subframe->type) {
1402 case FLAC__SUBFRAME_TYPE_CONSTANT:
1403 if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) {
1404 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1408 case FLAC__SUBFRAME_TYPE_FIXED:
1409 if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), frame_header->blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) {
1410 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1414 case FLAC__SUBFRAME_TYPE_LPC:
1415 if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), frame_header->blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) {
1416 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1420 case FLAC__SUBFRAME_TYPE_VERBATIM:
1421 if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), frame_header->blocksize, subframe_bps, subframe->wasted_bits, frame)) {
1422 encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1433 unsigned stream_encoder_evaluate_constant_subframe_(const FLAC__int32 signal, unsigned subframe_bps, FLAC__Subframe *subframe)
1435 subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT;
1436 subframe->data.constant.value = signal;
1438 return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe_bps;
1441 unsigned stream_encoder_evaluate_fixed_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe)
1443 unsigned i, residual_bits;
1444 const unsigned residual_samples = blocksize - order;
1446 FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual);
1448 subframe->type = FLAC__SUBFRAME_TYPE_FIXED;
1450 subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
1451 subframe->data.fixed.residual = residual;
1453 residual_bits = stream_encoder_find_best_partition_order_(encoder->private_, residual, abs_residual, abs_residual_partition_sums, raw_bits_per_partition, residual_samples, order, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, do_escape_coding, rice_parameter_search_dist, &subframe->data.fixed.entropy_coding_method.data.partitioned_rice.order, subframe->data.fixed.entropy_coding_method.data.partitioned_rice.parameters, subframe->data.fixed.entropy_coding_method.data.partitioned_rice.raw_bits);
1455 subframe->data.fixed.order = order;
1456 for(i = 0; i < order; i++)
1457 subframe->data.fixed.warmup[i] = signal[i];
1459 return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (order * subframe_bps) + residual_bits;
1462 unsigned stream_encoder_evaluate_lpc_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], const FLAC__real lp_coeff[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned qlp_coeff_precision, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe)
1464 FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER];
1465 unsigned i, residual_bits;
1466 int quantization, ret;
1467 const unsigned residual_samples = blocksize - order;
1469 ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, subframe_bps, qlp_coeff, &quantization);
1471 return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */
1473 if(subframe_bps <= 16 && qlp_coeff_precision <= 16)
1474 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
1476 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
1478 subframe->type = FLAC__SUBFRAME_TYPE_LPC;
1480 subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
1481 subframe->data.lpc.residual = residual;
1483 residual_bits = stream_encoder_find_best_partition_order_(encoder->private_, residual, abs_residual, abs_residual_partition_sums, raw_bits_per_partition, residual_samples, order, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, do_escape_coding, rice_parameter_search_dist, &subframe->data.lpc.entropy_coding_method.data.partitioned_rice.order, subframe->data.lpc.entropy_coding_method.data.partitioned_rice.parameters, subframe->data.lpc.entropy_coding_method.data.partitioned_rice.raw_bits);
1485 subframe->data.lpc.order = order;
1486 subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision;
1487 subframe->data.lpc.quantization_level = quantization;
1488 memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER);
1489 for(i = 0; i < order; i++)
1490 subframe->data.lpc.warmup[i] = signal[i];
1492 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;
1495 unsigned stream_encoder_evaluate_verbatim_subframe_(const FLAC__int32 signal[], unsigned blocksize, unsigned subframe_bps, FLAC__Subframe *subframe)
1497 subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM;
1499 subframe->data.verbatim.data = signal;
1501 return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (blocksize * subframe_bps);
1504 unsigned stream_encoder_find_best_partition_order_(FLAC__StreamEncoderPrivate *private_, const FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, unsigned *best_partition_order, unsigned best_parameters[], unsigned best_raw_bits[])
1507 unsigned residual_bits, best_residual_bits = 0;
1508 unsigned residual_sample;
1509 unsigned best_parameters_index = 0;
1510 const unsigned blocksize = residual_samples + predictor_order;
1512 /* compute abs(residual) for use later */
1513 for(residual_sample = 0; residual_sample < residual_samples; residual_sample++) {
1514 r = residual[residual_sample];
1515 abs_residual[residual_sample] = (FLAC__uint32)(r<0? -r : r);
1518 while(max_partition_order > 0 && blocksize >> max_partition_order <= predictor_order)
1519 max_partition_order--;
1520 FLAC__ASSERT(blocksize >> max_partition_order > predictor_order);
1521 min_partition_order = min(min_partition_order, max_partition_order);
1523 if(precompute_partition_sums) {
1524 int partition_order;
1527 stream_encoder_precompute_partition_info_sums_(abs_residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order);
1529 if(do_escape_coding)
1530 stream_encoder_precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order);
1532 for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) {
1533 #ifdef DONT_ESTIMATE_RICE_BITS
1534 if(!stream_encoder_set_partitioned_rice_with_precompute_(residual, abs_residual_partition_sums+sum, raw_bits_per_partition+sum, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, (unsigned)partition_order, do_escape_coding, private_->parameters[!best_parameters_index], private_->raw_bits[!best_parameters_index], &residual_bits))
1536 if(!stream_encoder_set_partitioned_rice_with_precompute_(abs_residual, abs_residual_partition_sums+sum, raw_bits_per_partition+sum, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, (unsigned)partition_order, do_escape_coding, private_->parameters[!best_parameters_index], private_->raw_bits[!best_parameters_index], &residual_bits))
1539 FLAC__ASSERT(best_residual_bits != 0);
1542 sum += 1u << partition_order;
1543 if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
1544 best_residual_bits = residual_bits;
1545 *best_partition_order = partition_order;
1546 best_parameters_index = !best_parameters_index;
1551 unsigned partition_order;
1552 for(partition_order = min_partition_order; partition_order <= max_partition_order; partition_order++) {
1553 #ifdef DONT_ESTIMATE_RICE_BITS
1554 if(!stream_encoder_set_partitioned_rice_(abs_residual, residual, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, partition_order, private_->parameters[!best_parameters_index], &residual_bits))
1556 if(!stream_encoder_set_partitioned_rice_(abs_residual, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, partition_order, private_->parameters[!best_parameters_index], &residual_bits))
1559 FLAC__ASSERT(best_residual_bits != 0);
1562 if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
1563 best_residual_bits = residual_bits;
1564 *best_partition_order = partition_order;
1565 best_parameters_index = !best_parameters_index;
1570 memcpy(best_parameters, private_->parameters[best_parameters_index], sizeof(unsigned)*(1<<(*best_partition_order)));
1571 memcpy(best_raw_bits, private_->raw_bits[best_parameters_index], sizeof(unsigned)*(1<<(*best_partition_order)));
1573 return best_residual_bits;
1576 void stream_encoder_precompute_partition_info_sums_(const FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order)
1578 int partition_order;
1579 unsigned from_partition, to_partition = 0;
1580 const unsigned blocksize = residual_samples + predictor_order;
1582 /* first do max_partition_order */
1583 for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
1584 FLAC__uint64 abs_residual_partition_sum;
1586 unsigned partition, partition_sample, partition_samples, residual_sample;
1587 const unsigned partitions = 1u << partition_order;
1588 const unsigned default_partition_samples = blocksize >> partition_order;
1590 FLAC__ASSERT(default_partition_samples > predictor_order);
1592 for(partition = residual_sample = 0; partition < partitions; partition++) {
1593 partition_samples = default_partition_samples;
1595 partition_samples -= predictor_order;
1596 abs_residual_partition_sum = 0;
1597 for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
1598 abs_r = abs_residual[residual_sample];
1599 abs_residual_partition_sum += abs_r;
1602 abs_residual_partition_sums[partition] = abs_residual_partition_sum;
1604 to_partition = partitions;
1608 /* now merge partitions for lower orders */
1609 for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
1612 const unsigned partitions = 1u << partition_order;
1613 for(i = 0; i < partitions; i++) {
1614 s = abs_residual_partition_sums[from_partition];
1616 abs_residual_partition_sums[to_partition] = s + abs_residual_partition_sums[from_partition];
1623 void stream_encoder_precompute_partition_info_escapes_(const FLAC__int32 residual[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order)
1625 int partition_order;
1626 unsigned from_partition, to_partition = 0;
1627 const unsigned blocksize = residual_samples + predictor_order;
1629 /* first do max_partition_order */
1630 for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
1631 FLAC__int32 r, residual_partition_min, residual_partition_max;
1632 unsigned silog2_min, silog2_max;
1633 unsigned partition, partition_sample, partition_samples, residual_sample;
1634 const unsigned partitions = 1u << partition_order;
1635 const unsigned default_partition_samples = blocksize >> partition_order;
1637 FLAC__ASSERT(default_partition_samples > predictor_order);
1639 for(partition = residual_sample = 0; partition < partitions; partition++) {
1640 partition_samples = default_partition_samples;
1642 partition_samples -= predictor_order;
1643 residual_partition_min = residual_partition_max = 0;
1644 for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
1645 r = residual[residual_sample];
1646 if(r < residual_partition_min)
1647 residual_partition_min = r;
1648 else if(r > residual_partition_max)
1649 residual_partition_max = r;
1652 silog2_min = FLAC__bitmath_silog2(residual_partition_min);
1653 silog2_max = FLAC__bitmath_silog2(residual_partition_max);
1654 raw_bits_per_partition[partition] = max(silog2_min, silog2_max);
1656 to_partition = partitions;
1660 /* now merge partitions for lower orders */
1661 for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
1664 const unsigned partitions = 1u << partition_order;
1665 for(i = 0; i < partitions; i++) {
1666 m = raw_bits_per_partition[from_partition];
1668 raw_bits_per_partition[to_partition] = max(m, raw_bits_per_partition[from_partition]);
1675 #ifdef VARIABLE_RICE_BITS
1676 #undef VARIABLE_RICE_BITS
1678 #ifndef DONT_ESTIMATE_RICE_BITS
1679 #define VARIABLE_RICE_BITS(value, parameter) ((value) >> (parameter))
1682 #ifdef DONT_ESTIMATE_RICE_BITS
1683 FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits)
1685 FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits)
1688 unsigned rice_parameter, partition_bits;
1689 #ifndef NO_RICE_SEARCH
1690 unsigned best_partition_bits;
1691 unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
1693 unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
1695 FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
1697 if(partition_order == 0) {
1700 #ifndef NO_RICE_SEARCH
1701 if(rice_parameter_search_dist) {
1702 if(suggested_rice_parameter < rice_parameter_search_dist)
1703 min_rice_parameter = 0;
1705 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
1706 max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
1707 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1708 #ifdef DEBUG_VERBOSE
1709 fprintf(stderr, "clipping rice_parameter (%u -> %u) @2\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1711 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1715 min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
1717 best_partition_bits = 0xffffffff;
1718 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1720 #ifdef VARIABLE_RICE_BITS
1721 #ifdef FLAC__SYMMETRIC_RICE
1722 partition_bits = (2+rice_parameter) * residual_samples;
1724 const unsigned rice_parameter_estimate = rice_parameter-1;
1725 partition_bits = (1+rice_parameter) * residual_samples;
1730 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1731 for(i = 0; i < residual_samples; i++) {
1732 #ifdef VARIABLE_RICE_BITS
1733 #ifdef FLAC__SYMMETRIC_RICE
1734 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter);
1736 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
1739 partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
1742 #ifndef NO_RICE_SEARCH
1743 if(partition_bits < best_partition_bits) {
1744 best_rice_parameter = rice_parameter;
1745 best_partition_bits = partition_bits;
1749 parameters[0] = best_rice_parameter;
1750 bits_ += best_partition_bits;
1753 unsigned partition, residual_sample, save_residual_sample, partition_sample;
1754 unsigned partition_samples;
1755 FLAC__uint64 mean, k;
1756 const unsigned partitions = 1u << partition_order;
1757 for(partition = residual_sample = 0; partition < partitions; partition++) {
1758 partition_samples = (residual_samples+predictor_order) >> partition_order;
1759 if(partition == 0) {
1760 if(partition_samples <= predictor_order)
1763 partition_samples -= predictor_order;
1766 save_residual_sample = residual_sample;
1767 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++)
1768 mean += abs_residual[residual_sample];
1769 residual_sample = save_residual_sample;
1770 #ifdef FLAC__SYMMETRIC_RICE
1771 mean += partition_samples >> 1; /* for rounding effect */
1772 mean /= partition_samples;
1774 /* calc rice_parameter = floor(log2(mean)) */
1782 /* calc rice_parameter ala LOCO-I */
1783 for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
1786 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1787 #ifdef DEBUG_VERBOSE
1788 fprintf(stderr, "clipping rice_parameter (%u -> %u) @3\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1790 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1793 #ifndef NO_RICE_SEARCH
1794 if(rice_parameter_search_dist) {
1795 if(rice_parameter < rice_parameter_search_dist)
1796 min_rice_parameter = 0;
1798 min_rice_parameter = rice_parameter - rice_parameter_search_dist;
1799 max_rice_parameter = rice_parameter + rice_parameter_search_dist;
1800 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1801 #ifdef DEBUG_VERBOSE
1802 fprintf(stderr, "clipping rice_parameter (%u -> %u) @4\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1804 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1808 min_rice_parameter = max_rice_parameter = rice_parameter;
1810 best_partition_bits = 0xffffffff;
1811 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1813 #ifdef VARIABLE_RICE_BITS
1814 #ifdef FLAC__SYMMETRIC_RICE
1815 partition_bits = (2+rice_parameter) * partition_samples;
1817 const unsigned rice_parameter_estimate = rice_parameter-1;
1818 partition_bits = (1+rice_parameter) * partition_samples;
1823 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1824 save_residual_sample = residual_sample;
1825 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
1826 #ifdef VARIABLE_RICE_BITS
1827 #ifdef FLAC__SYMMETRIC_RICE
1828 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter);
1830 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
1833 partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
1836 #ifndef NO_RICE_SEARCH
1837 if(rice_parameter != max_rice_parameter)
1838 residual_sample = save_residual_sample;
1839 if(partition_bits < best_partition_bits) {
1840 best_rice_parameter = rice_parameter;
1841 best_partition_bits = partition_bits;
1845 parameters[partition] = best_rice_parameter;
1846 bits_ += best_partition_bits;
1854 #ifdef DONT_ESTIMATE_RICE_BITS
1855 FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__int32 residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits)
1857 FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__uint32 abs_residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits)
1860 unsigned rice_parameter, partition_bits;
1861 #ifndef NO_RICE_SEARCH
1862 unsigned best_partition_bits;
1863 unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
1866 unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
1868 FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
1870 if(partition_order == 0) {
1873 #ifndef NO_RICE_SEARCH
1874 if(rice_parameter_search_dist) {
1875 if(suggested_rice_parameter < rice_parameter_search_dist)
1876 min_rice_parameter = 0;
1878 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
1879 max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
1880 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1881 #ifdef DEBUG_VERBOSE
1882 fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1884 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1888 min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
1890 best_partition_bits = 0xffffffff;
1891 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1893 #ifdef VARIABLE_RICE_BITS
1894 #ifdef FLAC__SYMMETRIC_RICE
1895 partition_bits = (2+rice_parameter) * residual_samples;
1897 const unsigned rice_parameter_estimate = rice_parameter-1;
1898 partition_bits = (1+rice_parameter) * residual_samples;
1903 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1904 for(i = 0; i < residual_samples; i++) {
1905 #ifdef VARIABLE_RICE_BITS
1906 #ifdef FLAC__SYMMETRIC_RICE
1907 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter);
1909 partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
1912 partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
1915 #ifndef NO_RICE_SEARCH
1916 if(partition_bits < best_partition_bits) {
1917 best_rice_parameter = rice_parameter;
1918 best_partition_bits = partition_bits;
1922 if(search_for_escapes) {
1923 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;
1924 if(flat_bits <= best_partition_bits) {
1925 raw_bits[0] = raw_bits_per_partition[0];
1926 best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
1927 best_partition_bits = flat_bits;
1930 parameters[0] = best_rice_parameter;
1931 bits_ += best_partition_bits;
1934 unsigned partition, residual_sample, save_residual_sample, partition_sample;
1935 unsigned partition_samples;
1936 FLAC__uint64 mean, k;
1937 const unsigned partitions = 1u << partition_order;
1938 for(partition = residual_sample = 0; partition < partitions; partition++) {
1939 partition_samples = (residual_samples+predictor_order) >> partition_order;
1940 if(partition == 0) {
1941 if(partition_samples <= predictor_order)
1944 partition_samples -= predictor_order;
1946 mean = abs_residual_partition_sums[partition];
1947 #ifdef FLAC__SYMMETRIC_RICE
1948 mean += partition_samples >> 1; /* for rounding effect */
1949 mean /= partition_samples;
1951 /* calc rice_parameter = floor(log2(mean)) */
1959 /* calc rice_parameter ala LOCO-I */
1960 for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
1963 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1964 #ifdef DEBUG_VERBOSE
1965 fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1967 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1970 #ifndef NO_RICE_SEARCH
1971 if(rice_parameter_search_dist) {
1972 if(rice_parameter < rice_parameter_search_dist)
1973 min_rice_parameter = 0;
1975 min_rice_parameter = rice_parameter - rice_parameter_search_dist;
1976 max_rice_parameter = rice_parameter + rice_parameter_search_dist;
1977 if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1978 #ifdef DEBUG_VERBOSE
1979 fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1981 max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1985 min_rice_parameter = max_rice_parameter = rice_parameter;
1987 best_partition_bits = 0xffffffff;
1988 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1990 #ifdef VARIABLE_RICE_BITS
1991 #ifdef FLAC__SYMMETRIC_RICE
1992 partition_bits = (2+rice_parameter) * partition_samples;
1994 const unsigned rice_parameter_estimate = rice_parameter-1;
1995 partition_bits = (1+rice_parameter) * partition_samples;
2000 partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2001 save_residual_sample = residual_sample;
2002 for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
2003 #ifdef VARIABLE_RICE_BITS
2004 #ifdef FLAC__SYMMETRIC_RICE
2005 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter);
2007 partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
2010 partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
2013 #ifndef NO_RICE_SEARCH
2014 if(rice_parameter != max_rice_parameter)
2015 residual_sample = save_residual_sample;
2016 if(partition_bits < best_partition_bits) {
2017 best_rice_parameter = rice_parameter;
2018 best_partition_bits = partition_bits;
2022 if(search_for_escapes) {
2023 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;
2024 if(flat_bits <= best_partition_bits) {
2025 raw_bits[partition] = raw_bits_per_partition[partition];
2026 best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2027 best_partition_bits = flat_bits;
2030 parameters[partition] = best_rice_parameter;
2031 bits_ += best_partition_bits;
2039 unsigned stream_encoder_get_wasted_bits_(FLAC__int32 signal[], unsigned samples)
2044 for(i = 0; i < samples && !(x&1); i++)
2051 for(shift = 0; !(x&1); shift++)
2056 for(i = 0; i < samples; i++)
2057 signal[i] >>= shift;