src/libFLAC/stream_encoder_framing.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000,2001,2002  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(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
  62                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
  63                                 return false;
  64                         FLAC__ASSERT(metadata->data.stream_info.channels > 0);
  65                         FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
  66                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
  67                                 return false;
  68                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
  69                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
  70                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
  71                                 return false;
  72                         if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
  73                                 return false;
  74                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.stream_info.md5sum, 16))
  75                                 return false;
  76                         break;
  77                 case FLAC__METADATA_TYPE_PADDING:
  78                         if(!FLAC__bitbuffer_write_zeroes(bb, metadata->length * 8))
  79                                 return false;
  80                         break;
  81                 case FLAC__METADATA_TYPE_APPLICATION:
  82                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
  83                                 return false;
  84                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
  85                                 return false;
  86                         break;
  87                 case FLAC__METADATA_TYPE_SEEKTABLE:
  88                         for(i = 0; i < metadata->data.seek_table.num_points; i++) {
  89                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
  90                                         return false;
  91                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
  92                                         return false;
  93                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
  94                                         return false;
  95                         }
  96                         break;
  97                 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
  98                         if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.vendor_string.length))
  99                                 return false;
 100                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.vorbis_comment.vendor_string.entry, metadata->data.vorbis_comment.vendor_string.length))
 101                                 return false;
 102                         if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.num_comments))
 103                                 return false;
 104                         for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
 105                                 if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.comments[i].length))
 106                                         return false;
 107                                 if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
 108                                         return false;
 109                         }
 110                         break;
 111                 default:
 112                         FLAC__ASSERT(0);
 113         }
 114
 115         return true;
 116 }
 117
 118 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__bool streamable_subset, FLAC__bool is_last_block, FLAC__BitBuffer *bb)
 119 {
 120         unsigned u, blocksize_hint, sample_rate_hint;
 121
 122         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(bb));
 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(FLAC__format_sample_rate_is_valid(header->sample_rate));
 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         FLAC__ASSERT(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER);
 226         if(!FLAC__bitbuffer_write_utf8_uint32(bb, header->number.frame_number))
 227                 return false;
 228
 229         if(blocksize_hint)
 230                 if(!FLAC__bitbuffer_write_raw_uint32(bb, header->blocksize-1, (blocksize_hint==6)? 8:16))
 231                         return false;
 232
 233         switch(sample_rate_hint) {
 234                 case 12:
 235                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 1000, 8))
 236                                 return false;
 237                         break;
 238                 case 13:
 239                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate, 16))
 240                                 return false;
 241                         break;
 242                 case 14:
 243                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 10, 16))
 244                                 return false;
 245                         break;
 246         }
 247
 248         /* write the CRC */
 249         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__bitbuffer_get_write_crc8(bb), FLAC__FRAME_HEADER_CRC_LEN))
 250                 return false;
 251
 252         return true;
 253 }
 254
 255 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 256 {
 257         FLAC__bool ok;
 258
 259         ok =
 260                 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) &&
 261                 (wasted_bits? FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1) : true) &&
 262                 FLAC__bitbuffer_write_raw_int32(bb, subframe->value, subframe_bps)
 263         ;
 264
 265         return ok;
 266 }
 267
 268 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 269 {
 270         unsigned i;
 271
 272         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))
 273                 return false;
 274         if(wasted_bits)
 275                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 276                         return false;
 277
 278         for(i = 0; i < subframe->order; i++)
 279                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 280                         return false;
 281
 282         if(!subframe_add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 283                 return false;
 284         switch(subframe->entropy_coding_method.type) {
 285                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 286                         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))
 287                                 return false;
 288                         break;
 289                 default:
 290                         FLAC__ASSERT(0);
 291         }
 292
 293         return true;
 294 }
 295
 296 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 297 {
 298         unsigned i;
 299
 300         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))
 301                 return false;
 302         if(wasted_bits)
 303                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 304                         return false;
 305
 306         for(i = 0; i < subframe->order; i++)
 307                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 308                         return false;
 309
 310         if(!FLAC__bitbuffer_write_raw_uint32(bb, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
 311                 return false;
 312         if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
 313                 return false;
 314         for(i = 0; i < subframe->order; i++)
 315                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
 316                         return false;
 317
 318         if(!subframe_add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 319                 return false;
 320         switch(subframe->entropy_coding_method.type) {
 321                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 322                         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))
 323                                 return false;
 324                         break;
 325                 default:
 326                         FLAC__ASSERT(0);
 327         }
 328
 329         return true;
 330 }
 331
 332 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 333 {
 334         unsigned i;
 335         const FLAC__int32 *signal = subframe->data;
 336
 337         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))
 338                 return false;
 339         if(wasted_bits)
 340                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 341                         return false;
 342
 343         for(i = 0; i < samples; i++)
 344                 if(!FLAC__bitbuffer_write_raw_int32(bb, signal[i], subframe_bps))
 345                         return false;
 346
 347         return true;
 348 }
 349
 350 FLAC__bool subframe_add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method)
 351 {
 352         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
 353                 return false;
 354         switch(method->type) {
 355                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 356                         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 357                                 return false;
 358                         break;
 359                 default:
 360                         FLAC__ASSERT(0);
 361         }
 362         return true;
 363 }
 364
 365 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)
 366 {
 367         if(partition_order == 0) {
 368                 unsigned i;
 369
 370                 if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 371                         return false;
 372                 if(rice_parameters[0] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 373                         for(i = 0; i < residual_samples; i++) {
 374 #ifdef FLAC__SYMMETRIC_RICE
 375                                 if(!FLAC__bitbuffer_write_symmetric_rice_signed(bb, residual[i], rice_parameters[0]))
 376                                         return false;
 377 #else
 378                                 if(!FLAC__bitbuffer_write_rice_signed(bb, residual[i], rice_parameters[0]))
 379                                         return false;
 380 #endif
 381                         }
 382                 }
 383                 else {
 384                         if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 385                                 return false;
 386                         for(i = 0; i < residual_samples; i++) {
 387                                 if(!FLAC__bitbuffer_write_raw_int32(bb, residual[i], raw_bits[0]))
 388                                         return false;
 389                         }
 390                 }
 391                 return true;
 392         }
 393         else {
 394                 unsigned i, j, k = 0, k_last = 0;
 395                 unsigned partition_samples;
 396                 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
 397                 for(i = 0; i < (1u<<partition_order); i++) {
 398                         if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 399                                 return false;
 400                         partition_samples = default_partition_samples;
 401                         if(i == 0)
 402                                 partition_samples -= predictor_order;
 403                         k += partition_samples;
 404                         if(rice_parameters[i] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 405                                 for(j = k_last; j < k; j++) {
 406 #ifdef FLAC__SYMMETRIC_RICE
 407                                         if(!FLAC__bitbuffer_write_symmetric_rice_signed(bb, residual[j], rice_parameters[i]))
 408                                                 return false;
 409 #else
 410                                         if(!FLAC__bitbuffer_write_rice_signed(bb, residual[j], rice_parameters[i]))
 411                                                 return false;
 412 #endif
 413                                 }
 414                         }
 415                         else {
 416                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 417                                         return false;
 418                                 for(j = k_last; j < k; j++) {
 419                                         if(!FLAC__bitbuffer_write_raw_int32(bb, residual[j], raw_bits[i]))
 420                                                 return false;
 421                                 }
 422                         }
 423                         k_last = k;
 424                 }
 425                 return true;
 426         }
 427 }