src/libFLAC/stream_encoder_framing.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000,2001,2002,2003  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 <string.h> /* for strlen() */
  22 #include "private/stream_encoder_framing.h"
  23 #include "private/crc.h"
  24 #include "FLAC/assert.h"
  25
  26 #ifdef max
  27 #undef max
  28 #endif
  29 #define max(x,y) ((x)>(y)?(x):(y))
  30
  31 static FLAC__bool add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method);
  32 static FLAC__bool 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);
  33
  34 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitBuffer *bb)
  35 {
  36         unsigned i, j;
  37         const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING);
  38
  39         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
  40                 return false;
  41
  42         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
  43                 return false;
  44
  45         /*
  46          * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
  47          */
  48         i = metadata->length;
  49         if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
  50                 FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
  51                 i -= metadata->data.vorbis_comment.vendor_string.length;
  52                 i += vendor_string_length;
  53         }
  54         FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
  55         if(!FLAC__bitbuffer_write_raw_uint32(bb, i, FLAC__STREAM_METADATA_LENGTH_LEN))
  56                 return false;
  57
  58         switch(metadata->type) {
  59                 case FLAC__METADATA_TYPE_STREAMINFO:
  60                         FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
  61                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
  62                                 return false;
  63                         FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
  64                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
  65                                 return false;
  66                         FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
  67                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
  68                                 return false;
  69                         FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
  70                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
  71                                 return false;
  72                         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
  73                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
  74                                 return false;
  75                         FLAC__ASSERT(metadata->data.stream_info.channels > 0);
  76                         FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
  77                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
  78                                 return false;
  79                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
  80                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
  81                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
  82                                 return false;
  83                         if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
  84                                 return false;
  85                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.stream_info.md5sum, 16))
  86                                 return false;
  87                         break;
  88                 case FLAC__METADATA_TYPE_PADDING:
  89                         if(!FLAC__bitbuffer_write_zeroes(bb, metadata->length * 8))
  90                                 return false;
  91                         break;
  92                 case FLAC__METADATA_TYPE_APPLICATION:
  93                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
  94                                 return false;
  95                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
  96                                 return false;
  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                 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
 109                         if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, vendor_string_length))
 110                                 return false;
 111                         if(!FLAC__bitbuffer_write_byte_block(bb, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
 112                                 return false;
 113                         if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.num_comments))
 114                                 return false;
 115                         for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
 116                                 if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.comments[i].length))
 117                                         return false;
 118                                 if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
 119                                         return false;
 120                         }
 121                         break;
 122                 case FLAC__METADATA_TYPE_CUESHEET:
 123                         FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
 124                         if(!FLAC__bitbuffer_write_byte_block(bb, (const FLAC__byte*)metadata->data.cue_sheet.media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8))
 125                                 return false;
 126                         if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
 127                                 return false;
 128                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
 129                                 return false;
 130                         if(!FLAC__bitbuffer_write_zeroes(bb, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
 131                                 return false;
 132                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
 133                                 return false;
 134                         for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
 135                                 const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;
 136
 137                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
 138                                         return false;
 139                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
 140                                         return false;
 141                                 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
 142                                 if(!FLAC__bitbuffer_write_byte_block(bb, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
 143                                         return false;
 144                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
 145                                         return false;
 146                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
 147                                         return false;
 148                                 if(!FLAC__bitbuffer_write_zeroes(bb, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
 149                                         return false;
 150                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
 151                                         return false;
 152                                 for(j = 0; j < track->num_indices; j++) {
 153                                         const FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
 154
 155                                         if(!FLAC__bitbuffer_write_raw_uint64(bb, index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
 156                                                 return false;
 157                                         if(!FLAC__bitbuffer_write_raw_uint32(bb, index->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
 158                                                 return false;
 159                                         if(!FLAC__bitbuffer_write_zeroes(bb, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
 160                                                 return false;
 161                                 }
 162                         }
 163                         break;
 164                 default:
 165                         FLAC__ASSERT(0);
 166         }
 167
 168         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(bb));
 169         return true;
 170 }
 171
 172 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__bool streamable_subset, FLAC__bool is_last_block, FLAC__BitBuffer *bb)
 173 {
 174         unsigned u, blocksize_hint, sample_rate_hint;
 175
 176         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(bb));
 177
 178         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
 179                 return false;
 180
 181         if(!FLAC__bitbuffer_write_raw_uint32(bb, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
 182                 return false;
 183
 184         FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
 185         blocksize_hint = 0;
 186         switch(header->blocksize) {
 187                 case   192: u = 1; break;
 188                 case   576: u = 2; break;
 189                 case  1152: u = 3; break;
 190                 case  2304: u = 4; break;
 191                 case  4608: u = 5; break;
 192                 case   256: u = 8; break;
 193                 case   512: u = 9; break;
 194                 case  1024: u = 10; break;
 195                 case  2048: u = 11; break;
 196                 case  4096: u = 12; break;
 197                 case  8192: u = 13; break;
 198                 case 16384: u = 14; break;
 199                 case 32768: u = 15; break;
 200                 default:
 201                         if(streamable_subset || is_last_block) {
 202                                 if(header->blocksize <= 0x100)
 203                                         blocksize_hint = u = 6;
 204                                 else
 205                                         blocksize_hint = u = 7;
 206                         }
 207                         else
 208                                 u = 0;
 209                         break;
 210         }
 211         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
 212                 return false;
 213
 214         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
 215         sample_rate_hint = 0;
 216         switch(header->sample_rate) {
 217                 case  8000: u = 4; break;
 218                 case 16000: u = 5; break;
 219                 case 22050: u = 6; break;
 220                 case 24000: u = 7; break;
 221                 case 32000: u = 8; break;
 222                 case 44100: u = 9; break;
 223                 case 48000: u = 10; break;
 224                 case 96000: u = 11; break;
 225                 default:
 226                         if(streamable_subset) {
 227                                 if(header->sample_rate % 1000 == 0)
 228                                         sample_rate_hint = u = 12;
 229                                 else if(header->sample_rate % 10 == 0)
 230                                         sample_rate_hint = u = 14;
 231                                 else
 232                                         sample_rate_hint = u = 13;
 233                         }
 234                         else
 235                                 u = 0;
 236                         break;
 237         }
 238         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
 239                 return false;
 240
 241         FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
 242         switch(header->channel_assignment) {
 243                 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
 244                         u = header->channels - 1;
 245                         break;
 246                 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
 247                         FLAC__ASSERT(header->channels == 2);
 248                         u = 8;
 249                         break;
 250                 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
 251                         FLAC__ASSERT(header->channels == 2);
 252                         u = 9;
 253                         break;
 254                 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
 255                         FLAC__ASSERT(header->channels == 2);
 256                         u = 10;
 257                         break;
 258                 default:
 259                         FLAC__ASSERT(0);
 260         }
 261         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
 262                 return false;
 263
 264         FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
 265         switch(header->bits_per_sample) {
 266                 case 8 : u = 1; break;
 267                 case 12: u = 2; break;
 268                 case 16: u = 4; break;
 269                 case 20: u = 5; break;
 270                 case 24: u = 6; break;
 271                 default: u = 0; break;
 272         }
 273         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
 274                 return false;
 275
 276         if(!FLAC__bitbuffer_write_raw_uint32(bb, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
 277                 return false;
 278
 279         FLAC__ASSERT(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER);
 280         if(!FLAC__bitbuffer_write_utf8_uint32(bb, header->number.frame_number))
 281                 return false;
 282
 283         if(blocksize_hint)
 284                 if(!FLAC__bitbuffer_write_raw_uint32(bb, header->blocksize-1, (blocksize_hint==6)? 8:16))
 285                         return false;
 286
 287         switch(sample_rate_hint) {
 288                 case 12:
 289                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 1000, 8))
 290                                 return false;
 291                         break;
 292                 case 13:
 293                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate, 16))
 294                                 return false;
 295                         break;
 296                 case 14:
 297                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 10, 16))
 298                                 return false;
 299                         break;
 300         }
 301
 302         /* write the CRC */
 303         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__bitbuffer_get_write_crc8(bb), FLAC__FRAME_HEADER_CRC_LEN))
 304                 return false;
 305
 306         return true;
 307 }
 308
 309 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 310 {
 311         FLAC__bool ok;
 312
 313         ok =
 314                 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) &&
 315                 (wasted_bits? FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1) : true) &&
 316                 FLAC__bitbuffer_write_raw_int32(bb, subframe->value, subframe_bps)
 317         ;
 318
 319         return ok;
 320 }
 321
 322 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 323 {
 324         unsigned i;
 325
 326         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))
 327                 return false;
 328         if(wasted_bits)
 329                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 330                         return false;
 331
 332         for(i = 0; i < subframe->order; i++)
 333                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 334                         return false;
 335
 336         if(!add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 337                 return false;
 338         switch(subframe->entropy_coding_method.type) {
 339                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 340                         if(!add_residual_partitioned_rice_(bb, subframe->residual, residual_samples, subframe->order, subframe->entropy_coding_method.data.partitioned_rice.contents->parameters, subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits, subframe->entropy_coding_method.data.partitioned_rice.order))
 341                                 return false;
 342                         break;
 343                 default:
 344                         FLAC__ASSERT(0);
 345         }
 346
 347         return true;
 348 }
 349
 350 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 351 {
 352         unsigned i;
 353
 354         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))
 355                 return false;
 356         if(wasted_bits)
 357                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 358                         return false;
 359
 360         for(i = 0; i < subframe->order; i++)
 361                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 362                         return false;
 363
 364         if(!FLAC__bitbuffer_write_raw_uint32(bb, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
 365                 return false;
 366         if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
 367                 return false;
 368         for(i = 0; i < subframe->order; i++)
 369                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
 370                         return false;
 371
 372         if(!add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 373                 return false;
 374         switch(subframe->entropy_coding_method.type) {
 375                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 376                         if(!add_residual_partitioned_rice_(bb, subframe->residual, residual_samples, subframe->order, subframe->entropy_coding_method.data.partitioned_rice.contents->parameters, subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits, subframe->entropy_coding_method.data.partitioned_rice.order))
 377                                 return false;
 378                         break;
 379                 default:
 380                         FLAC__ASSERT(0);
 381         }
 382
 383         return true;
 384 }
 385
 386 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 387 {
 388         unsigned i;
 389         const FLAC__int32 *signal = subframe->data;
 390
 391         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))
 392                 return false;
 393         if(wasted_bits)
 394                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 395                         return false;
 396
 397         for(i = 0; i < samples; i++)
 398                 if(!FLAC__bitbuffer_write_raw_int32(bb, signal[i], subframe_bps))
 399                         return false;
 400
 401         return true;
 402 }
 403
 404 FLAC__bool add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method)
 405 {
 406         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
 407                 return false;
 408         switch(method->type) {
 409                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 410                         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 411                                 return false;
 412                         break;
 413                 default:
 414                         FLAC__ASSERT(0);
 415         }
 416         return true;
 417 }
 418
 419 FLAC__bool 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)
 420 {
 421         if(partition_order == 0) {
 422                 unsigned i;
 423
 424                 if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 425                         return false;
 426                 if(rice_parameters[0] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 427                         for(i = 0; i < residual_samples; i++) {
 428 #ifdef FLAC__SYMMETRIC_RICE
 429                                 if(!FLAC__bitbuffer_write_symmetric_rice_signed(bb, residual[i], rice_parameters[0]))
 430                                         return false;
 431 #else
 432                                 if(!FLAC__bitbuffer_write_rice_signed(bb, residual[i], rice_parameters[0]))
 433                                         return false;
 434 #endif
 435                         }
 436                 }
 437                 else {
 438                         if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 439                                 return false;
 440                         for(i = 0; i < residual_samples; i++) {
 441                                 if(!FLAC__bitbuffer_write_raw_int32(bb, residual[i], raw_bits[0]))
 442                                         return false;
 443                         }
 444                 }
 445                 return true;
 446         }
 447         else {
 448                 unsigned i, j, k = 0, k_last = 0;
 449                 unsigned partition_samples;
 450                 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
 451                 for(i = 0; i < (1u<<partition_order); i++) {
 452                         if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 453                                 return false;
 454                         partition_samples = default_partition_samples;
 455                         if(i == 0)
 456                                 partition_samples -= predictor_order;
 457                         k += partition_samples;
 458                         if(rice_parameters[i] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 459                                 for(j = k_last; j < k; j++) {
 460 #ifdef FLAC__SYMMETRIC_RICE
 461                                         if(!FLAC__bitbuffer_write_symmetric_rice_signed(bb, residual[j], rice_parameters[i]))
 462                                                 return false;
 463 #else
 464                                         if(!FLAC__bitbuffer_write_rice_signed(bb, residual[j], rice_parameters[i]))
 465                                                 return false;
 466 #endif
 467                                 }
 468                         }
 469                         else {
 470                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 471                                         return false;
 472                                 for(j = k_last; j < k; j++) {
 473                                         if(!FLAC__bitbuffer_write_raw_int32(bb, residual[j], raw_bits[i]))
 474                                                 return false;
 475                                 }
 476                         }
 477                         k_last = k;
 478                 }
 479                 return true;
 480         }
 481 }