src/libFLAC/stream_encoder_framing.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000,2001  Josh Coalson
   3  *
   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.
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 #include <stdio.h>
  21 #include "private/stream_encoder_framing.h"
  22 #include "private/crc.h"
  23 #include "FLAC/assert.h"
  24
  25 #ifdef max
  26 #undef max
  27 #endif
  28 #define max(x,y) ((x)>(y)?(x):(y))
  29
  30 static FLAC__bool subframe_add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method);
  31 static FLAC__bool subframe_add_residual_partitioned_rice_(FLAC__BitBuffer *bb, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order);
  32
  33 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetaData *metadata, FLAC__BitBuffer *bb)
  34 {
  35         unsigned i;
  36
  37         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
  38                 return false;
  39
  40         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
  41                 return false;
  42
  43         FLAC__ASSERT(metadata->length < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
  44         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->length, FLAC__STREAM_METADATA_LENGTH_LEN))
  45                 return false;
  46
  47         switch(metadata->type) {
  48                 case FLAC__METADATA_TYPE_STREAMINFO:
  49                         FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
  50                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
  51                                 return false;
  52                         FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
  53                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
  54                                 return false;
  55                         FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
  56                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
  57                                 return false;
  58                         FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
  59                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
  60                                 return false;
  61                         FLAC__ASSERT(metadata->data.stream_info.sample_rate > 0);
  62                         FLAC__ASSERT(metadata->data.stream_info.sample_rate < (1u << FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN));
  63                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
  64                                 return false;
  65                         FLAC__ASSERT(metadata->data.stream_info.channels > 0);
  66                         FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
  67                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
  68                                 return false;
  69                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
  70                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
  71                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
  72                                 return false;
  73                         if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
  74                                 return false;
  75                         for(i = 0; i < 16; i++) {
  76                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.md5sum[i], 8))
  77                                         return false;
  78                         }
  79                         break;
  80                 case FLAC__METADATA_TYPE_PADDING:
  81                         if(!FLAC__bitbuffer_write_zeroes(bb, metadata->length * 8))
  82                                 return false;
  83                         break;
  84                 case FLAC__METADATA_TYPE_APPLICATION:
  85                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.application.id[0], 8))
  86                                 return false;
  87                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.application.id[1], 8))
  88                                 return false;
  89                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.application.id[2], 8))
  90                                 return false;
  91                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.application.id[3], 8))
  92                                 return false;
  93                         for(i = 0; i < metadata->length; i++) {
  94                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.application.data[i], 8))
  95                                         return false;
  96                         }
  97                         break;
  98                 case FLAC__METADATA_TYPE_SEEKTABLE:
  99                         for(i = 0; i < metadata->data.seek_table.num_points; i++) {
 100                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
 101                                         return false;
 102                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
 103                                         return false;
 104                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
 105                                         return false;
 106                         }
 107                         break;
 108                 default:
 109                         FLAC__ASSERT(0);
 110         }
 111
 112         return true;
 113 }
 114
 115 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__bool streamable_subset, FLAC__bool is_last_block, FLAC__BitBuffer *bb)
 116 {
 117         unsigned u, crc8_start, blocksize_hint, sample_rate_hint;
 118         FLAC__byte crc8;
 119
 120         FLAC__ASSERT(bb->bits == 0); /* assert that we're byte-aligned before writing */
 121
 122         crc8_start = bb->bytes;
 123
 124         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
 125                 return false;
 126
 127         if(!FLAC__bitbuffer_write_raw_uint32(bb, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
 128                 return false;
 129
 130         FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
 131         blocksize_hint = 0;
 132         switch(header->blocksize) {
 133                 case   192: u = 1; break;
 134                 case   576: u = 2; break;
 135                 case  1152: u = 3; break;
 136                 case  2304: u = 4; break;
 137                 case  4608: u = 5; break;
 138                 case   256: u = 8; break;
 139                 case   512: u = 9; break;
 140                 case  1024: u = 10; break;
 141                 case  2048: u = 11; break;
 142                 case  4096: u = 12; break;
 143                 case  8192: u = 13; break;
 144                 case 16384: u = 14; break;
 145                 case 32768: u = 15; break;
 146                 default:
 147                         if(streamable_subset || is_last_block) {
 148                                 if(header->blocksize <= 0x100)
 149                                         blocksize_hint = u = 6;
 150                                 else
 151                                         blocksize_hint = u = 7;
 152                         }
 153                         else
 154                                 u = 0;
 155                         break;
 156         }
 157         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
 158                 return false;
 159
 160         FLAC__ASSERT(header->sample_rate > 0 && header->sample_rate < (1u << FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN));
 161         sample_rate_hint = 0;
 162         switch(header->sample_rate) {
 163                 case  8000: u = 4; break;
 164                 case 16000: u = 5; break;
 165                 case 22050: u = 6; break;
 166                 case 24000: u = 7; break;
 167                 case 32000: u = 8; break;
 168                 case 44100: u = 9; break;
 169                 case 48000: u = 10; break;
 170                 case 96000: u = 11; break;
 171                 default:
 172                         if(streamable_subset) {
 173                                 if(header->sample_rate % 1000 == 0)
 174                                         sample_rate_hint = u = 12;
 175                                 else if(header->sample_rate % 10 == 0)
 176                                         sample_rate_hint = u = 14;
 177                                 else
 178                                         sample_rate_hint = u = 13;
 179                         }
 180                         else
 181                                 u = 0;
 182                         break;
 183         }
 184         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
 185                 return false;
 186
 187         FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
 188         switch(header->channel_assignment) {
 189                 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
 190                         u = header->channels - 1;
 191                         break;
 192                 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
 193                         FLAC__ASSERT(header->channels == 2);
 194                         u = 8;
 195                         break;
 196                 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
 197                         FLAC__ASSERT(header->channels == 2);
 198                         u = 9;
 199                         break;
 200                 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
 201                         FLAC__ASSERT(header->channels == 2);
 202                         u = 10;
 203                         break;
 204                 default:
 205                         FLAC__ASSERT(0);
 206         }
 207         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
 208                 return false;
 209
 210         FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
 211         switch(header->bits_per_sample) {
 212                 case 8 : u = 1; break;
 213                 case 12: u = 2; break;
 214                 case 16: u = 4; break;
 215                 case 20: u = 5; break;
 216                 case 24: u = 6; break;
 217                 default: u = 0; break;
 218         }
 219         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
 220                 return false;
 221
 222         if(!FLAC__bitbuffer_write_raw_uint32(bb, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
 223                 return false;
 224
 225         if(!FLAC__bitbuffer_write_utf8_uint32(bb, header->number.frame_number))
 226                 return false;
 227
 228         if(blocksize_hint)
 229                 if(!FLAC__bitbuffer_write_raw_uint32(bb, header->blocksize-1, (blocksize_hint==6)? 8:16))
 230                         return false;
 231
 232         switch(sample_rate_hint) {
 233                 case 12:
 234                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 1000, 8))
 235                                 return false;
 236                         break;
 237                 case 13:
 238                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate, 16))
 239                                 return false;
 240                         break;
 241                 case 14:
 242                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 10, 16))
 243                                 return false;
 244                         break;
 245         }
 246
 247         /* write the CRC */
 248         FLAC__ASSERT(bb->buffer[crc8_start] == 0xff); /* MAGIC NUMBER for the first byte of the sync code */
 249         FLAC__ASSERT(bb->bits == 0); /* assert that we're byte-aligned */
 250         crc8 = FLAC__crc8(bb->buffer+crc8_start, bb->bytes-crc8_start);
 251         if(!FLAC__bitbuffer_write_raw_uint32(bb, crc8, FLAC__FRAME_HEADER_CRC_LEN))
 252                 return false;
 253
 254         return true;
 255 }
 256
 257 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 258 {
 259         FLAC__bool ok;
 260
 261         ok =
 262                 FLAC__bitbuffer_write_raw_uint32(bb, FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN) &&
 263                 (wasted_bits? FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1) : true) &&
 264                 FLAC__bitbuffer_write_raw_int32(bb, subframe->value, subframe_bps)
 265         ;
 266
 267         return ok;
 268 }
 269
 270 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 271 {
 272         unsigned i;
 273
 274         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK | (subframe->order<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
 275                 return false;
 276         if(wasted_bits)
 277                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 278                         return false;
 279
 280         for(i = 0; i < subframe->order; i++)
 281                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 282                         return false;
 283
 284         if(!subframe_add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 285                 return false;
 286         switch(subframe->entropy_coding_method.type) {
 287                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 288                         if(!subframe_add_residual_partitioned_rice_(bb, subframe->residual, residual_samples, subframe->order, subframe->entropy_coding_method.data.partitioned_rice.parameters, subframe->entropy_coding_method.data.partitioned_rice.raw_bits, subframe->entropy_coding_method.data.partitioned_rice.order))
 289                                 return false;
 290                         break;
 291                 default:
 292                         FLAC__ASSERT(0);
 293         }
 294
 295         return true;
 296 }
 297
 298 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 299 {
 300         unsigned i;
 301
 302         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK | ((subframe->order-1)<<1) | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
 303                 return false;
 304         if(wasted_bits)
 305                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 306                         return false;
 307
 308         for(i = 0; i < subframe->order; i++)
 309                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 310                         return false;
 311
 312         if(!FLAC__bitbuffer_write_raw_uint32(bb, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
 313                 return false;
 314         if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
 315                 return false;
 316         for(i = 0; i < subframe->order; i++)
 317                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
 318                         return false;
 319
 320         if(!subframe_add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 321                 return false;
 322         switch(subframe->entropy_coding_method.type) {
 323                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 324                         if(!subframe_add_residual_partitioned_rice_(bb, subframe->residual, residual_samples, subframe->order, subframe->entropy_coding_method.data.partitioned_rice.parameters, subframe->entropy_coding_method.data.partitioned_rice.raw_bits, subframe->entropy_coding_method.data.partitioned_rice.order))
 325                                 return false;
 326                         break;
 327                 default:
 328                         FLAC__ASSERT(0);
 329         }
 330
 331         return true;
 332 }
 333
 334 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 335 {
 336         unsigned i;
 337         const FLAC__int32 *signal = subframe->data;
 338
 339         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK | (wasted_bits? 1:0), FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN))
 340                 return false;
 341         if(wasted_bits)
 342                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 343                         return false;
 344
 345         for(i = 0; i < samples; i++)
 346                 if(!FLAC__bitbuffer_write_raw_int32(bb, signal[i], subframe_bps))
 347                         return false;
 348
 349         return true;
 350 }
 351
 352 FLAC__bool subframe_add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method)
 353 {
 354         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
 355                 return false;
 356         switch(method->type) {
 357                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 358                         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 359                                 return false;
 360                         break;
 361                 default:
 362                         FLAC__ASSERT(0);
 363         }
 364         return true;
 365 }
 366
 367 FLAC__bool subframe_add_residual_partitioned_rice_(FLAC__BitBuffer *bb, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order)
 368 {
 369         if(partition_order == 0) {
 370                 unsigned i;
 371
 372                 if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 373                         return false;
 374                 if(rice_parameters[0] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 375                         for(i = 0; i < residual_samples; i++) {
 376 #ifdef FLAC__SYMMETRIC_RICE
 377                                 if(!FLAC__bitbuffer_write_symmetric_rice_signed(bb, residual[i], rice_parameters[0]))
 378                                         return false;
 379 #else
 380                                 if(!FLAC__bitbuffer_write_rice_signed(bb, residual[i], rice_parameters[0]))
 381                                         return false;
 382 #endif
 383                         }
 384                 }
 385                 else {
 386                         if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 387                                 return false;
 388                         for(i = 0; i < residual_samples; i++) {
 389                                 if(!FLAC__bitbuffer_write_raw_int32(bb, residual[i], raw_bits[0]))
 390                                         return false;
 391                         }
 392                 }
 393                 return true;
 394         }
 395         else {
 396                 unsigned i, j, k = 0, k_last = 0;
 397                 unsigned partition_samples;
 398                 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
 399                 for(i = 0; i < (1u<<partition_order); i++) {
 400                         if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 401                                 return false;
 402                         partition_samples = default_partition_samples;
 403                         if(i == 0)
 404                                 partition_samples -= predictor_order;
 405                         k += partition_samples;
 406                         if(rice_parameters[i] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 407                                 for(j = k_last; j < k; j++) {
 408 #ifdef FLAC__SYMMETRIC_RICE
 409                                         if(!FLAC__bitbuffer_write_symmetric_rice_signed(bb, residual[j], rice_parameters[i]))
 410                                                 return false;
 411 #else
 412                                         if(!FLAC__bitbuffer_write_rice_signed(bb, residual[j], rice_parameters[i]))
 413                                                 return false;
 414 #endif
 415                                 }
 416                         }
 417                         else {
 418                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 419                                         return false;
 420                                 for(j = k_last; j < k; j++) {
 421                                         if(!FLAC__bitbuffer_write_raw_int32(bb, residual[j], raw_bits[i]))
 422                                                 return false;
 423                                 }
 424                         }
 425                         k_last = k;
 426                 }
 427                 return true;
 428         }
 429 }