src/libFLAC/stream_encoder_framing.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006  Josh Coalson
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * - Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * - Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * - Neither the name of the Xiph.org Foundation nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_CONFIG_H
  33 #  include <config.h>
  34 #endif
  35
  36 #include <stdio.h>
  37 #include <string.h> /* for strlen() */
  38 #include "private/stream_encoder_framing.h"
  39 #include "private/crc.h"
  40 #include "FLAC/assert.h"
  41
  42 #ifdef max
  43 #undef max
  44 #endif
  45 #define max(x,y) ((x)>(y)?(x):(y))
  46
  47 static FLAC__bool add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method);
  48 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);
  49
  50 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitBuffer *bb)
  51 {
  52         unsigned i, j;
  53         const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING);
  54
  55         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
  56                 return false;
  57
  58         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
  59                 return false;
  60
  61         /*
  62          * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
  63          */
  64         i = metadata->length;
  65         if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
  66                 FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
  67                 i -= metadata->data.vorbis_comment.vendor_string.length;
  68                 i += vendor_string_length;
  69         }
  70         FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
  71         if(!FLAC__bitbuffer_write_raw_uint32(bb, i, FLAC__STREAM_METADATA_LENGTH_LEN))
  72                 return false;
  73
  74         switch(metadata->type) {
  75                 case FLAC__METADATA_TYPE_STREAMINFO:
  76                         FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
  77                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
  78                                 return false;
  79                         FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
  80                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
  81                                 return false;
  82                         FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
  83                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
  84                                 return false;
  85                         FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
  86                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
  87                                 return false;
  88                         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
  89                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
  90                                 return false;
  91                         FLAC__ASSERT(metadata->data.stream_info.channels > 0);
  92                         FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
  93                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
  94                                 return false;
  95                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
  96                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
  97                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
  98                                 return false;
  99                         if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
 100                                 return false;
 101                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.stream_info.md5sum, 16))
 102                                 return false;
 103                         break;
 104                 case FLAC__METADATA_TYPE_PADDING:
 105                         if(!FLAC__bitbuffer_write_zeroes(bb, metadata->length * 8))
 106                                 return false;
 107                         break;
 108                 case FLAC__METADATA_TYPE_APPLICATION:
 109                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
 110                                 return false;
 111                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
 112                                 return false;
 113                         break;
 114                 case FLAC__METADATA_TYPE_SEEKTABLE:
 115                         for(i = 0; i < metadata->data.seek_table.num_points; i++) {
 116                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
 117                                         return false;
 118                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
 119                                         return false;
 120                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
 121                                         return false;
 122                         }
 123                         break;
 124                 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
 125                         if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, vendor_string_length))
 126                                 return false;
 127                         if(!FLAC__bitbuffer_write_byte_block(bb, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
 128                                 return false;
 129                         if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.num_comments))
 130                                 return false;
 131                         for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
 132                                 if(!FLAC__bitbuffer_write_raw_uint32_little_endian(bb, metadata->data.vorbis_comment.comments[i].length))
 133                                         return false;
 134                                 if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
 135                                         return false;
 136                         }
 137                         break;
 138                 case FLAC__METADATA_TYPE_CUESHEET:
 139                         FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
 140                         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))
 141                                 return false;
 142                         if(!FLAC__bitbuffer_write_raw_uint64(bb, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
 143                                 return false;
 144                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
 145                                 return false;
 146                         if(!FLAC__bitbuffer_write_zeroes(bb, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
 147                                 return false;
 148                         if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
 149                                 return false;
 150                         for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
 151                                 const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;
 152
 153                                 if(!FLAC__bitbuffer_write_raw_uint64(bb, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
 154                                         return false;
 155                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
 156                                         return false;
 157                                 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
 158                                 if(!FLAC__bitbuffer_write_byte_block(bb, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
 159                                         return false;
 160                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
 161                                         return false;
 162                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
 163                                         return false;
 164                                 if(!FLAC__bitbuffer_write_zeroes(bb, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
 165                                         return false;
 166                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
 167                                         return false;
 168                                 for(j = 0; j < track->num_indices; j++) {
 169                                         const FLAC__StreamMetadata_CueSheet_Index *index = track->indices + j;
 170
 171                                         if(!FLAC__bitbuffer_write_raw_uint64(bb, index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
 172                                                 return false;
 173                                         if(!FLAC__bitbuffer_write_raw_uint32(bb, index->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
 174                                                 return false;
 175                                         if(!FLAC__bitbuffer_write_zeroes(bb, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
 176                                                 return false;
 177                                 }
 178                         }
 179                         break;
 180                 case FLAC__METADATA_TYPE_PICTURE:
 181                         {
 182                                 size_t len;
 183                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
 184                                         return false;
 185                                 len = strlen(metadata->data.picture.mime_type);
 186                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
 187                                         return false;
 188                                 if(!FLAC__bitbuffer_write_byte_block(bb, (const FLAC__byte*)metadata->data.picture.mime_type, len))
 189                                         return false;
 190                                 len = strlen((const char *)metadata->data.picture.description);
 191                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
 192                                         return false;
 193                                 if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.picture.description, len))
 194                                         return false;
 195                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
 196                                         return false;
 197                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
 198                                         return false;
 199                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
 200                                         return false;
 201                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
 202                                         return false;
 203                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
 204                                         return false;
 205                                 if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.picture.data, metadata->data.picture.data_length))
 206                                         return false;
 207                         }
 208                         break;
 209                 default:
 210                         if(!FLAC__bitbuffer_write_byte_block(bb, metadata->data.unknown.data, metadata->length))
 211                                 return false;
 212                         break;
 213         }
 214
 215         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(bb));
 216         return true;
 217 }
 218
 219 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__bool streamable_subset, FLAC__BitBuffer *bb)
 220 {
 221         unsigned u, blocksize_hint, sample_rate_hint;
 222
 223         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(bb));
 224
 225         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
 226                 return false;
 227
 228         if(!FLAC__bitbuffer_write_raw_uint32(bb, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
 229                 return false;
 230
 231         FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
 232         /* when this assertion holds true, any legal blocksize can be expressed in the frame header */
 233         FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u);
 234         blocksize_hint = 0;
 235         switch(header->blocksize) {
 236                 case   192: u = 1; break;
 237                 case   576: u = 2; break;
 238                 case  1152: u = 3; break;
 239                 case  2304: u = 4; break;
 240                 case  4608: u = 5; break;
 241                 case   256: u = 8; break;
 242                 case   512: u = 9; break;
 243                 case  1024: u = 10; break;
 244                 case  2048: u = 11; break;
 245                 case  4096: u = 12; break;
 246                 case  8192: u = 13; break;
 247                 case 16384: u = 14; break;
 248                 case 32768: u = 15; break;
 249                 default:
 250                         if(header->blocksize <= 0x100)
 251                                 blocksize_hint = u = 6;
 252                         else if(header->blocksize <= 0x10000)
 253                                 blocksize_hint = u = 7;
 254                         else {
 255                                 FLAC__ASSERT(0);
 256                                 return false;
 257                         }
 258                         break;
 259         }
 260         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
 261                 return false;
 262
 263         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
 264         sample_rate_hint = 0;
 265         switch(header->sample_rate) {
 266                 case  8000: u = 4; break;
 267                 case 16000: u = 5; break;
 268                 case 22050: u = 6; break;
 269                 case 24000: u = 7; break;
 270                 case 32000: u = 8; break;
 271                 case 44100: u = 9; break;
 272                 case 48000: u = 10; break;
 273                 case 96000: u = 11; break;
 274                 default:
 275                         if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0)
 276                                 sample_rate_hint = u = 12;
 277                         else if(header->sample_rate % 10 == 0)
 278                                 sample_rate_hint = u = 14;
 279                         else if(header->sample_rate <= 0xffff)
 280                                 sample_rate_hint = u = 13;
 281                         else if(streamable_subset) {
 282                                 FLAC__ASSERT(0);
 283                                 return false;
 284                         }
 285                         else
 286                                 u = 0;
 287                         break;
 288         }
 289         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
 290                 return false;
 291
 292         FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
 293         switch(header->channel_assignment) {
 294                 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
 295                         u = header->channels - 1;
 296                         break;
 297                 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
 298                         FLAC__ASSERT(header->channels == 2);
 299                         u = 8;
 300                         break;
 301                 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
 302                         FLAC__ASSERT(header->channels == 2);
 303                         u = 9;
 304                         break;
 305                 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
 306                         FLAC__ASSERT(header->channels == 2);
 307                         u = 10;
 308                         break;
 309                 default:
 310                         FLAC__ASSERT(0);
 311         }
 312         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
 313                 return false;
 314
 315         FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
 316         switch(header->bits_per_sample) {
 317                 case 8 : u = 1; break;
 318                 case 12: u = 2; break;
 319                 case 16: u = 4; break;
 320                 case 20: u = 5; break;
 321                 case 24: u = 6; break;
 322                 default: u = 0; break;
 323         }
 324         if(!FLAC__bitbuffer_write_raw_uint32(bb, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
 325                 return false;
 326
 327         if(!FLAC__bitbuffer_write_raw_uint32(bb, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
 328                 return false;
 329
 330         FLAC__ASSERT(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER);
 331         if(!FLAC__bitbuffer_write_utf8_uint32(bb, header->number.frame_number))
 332                 return false;
 333
 334         if(blocksize_hint)
 335                 if(!FLAC__bitbuffer_write_raw_uint32(bb, header->blocksize-1, (blocksize_hint==6)? 8:16))
 336                         return false;
 337
 338         switch(sample_rate_hint) {
 339                 case 12:
 340                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 1000, 8))
 341                                 return false;
 342                         break;
 343                 case 13:
 344                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate, 16))
 345                                 return false;
 346                         break;
 347                 case 14:
 348                         if(!FLAC__bitbuffer_write_raw_uint32(bb, header->sample_rate / 10, 16))
 349                                 return false;
 350                         break;
 351         }
 352
 353         /* write the CRC */
 354         if(!FLAC__bitbuffer_write_raw_uint32(bb, FLAC__bitbuffer_get_write_crc8(bb), FLAC__FRAME_HEADER_CRC_LEN))
 355                 return false;
 356
 357         return true;
 358 }
 359
 360 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 361 {
 362         FLAC__bool ok;
 363
 364         ok =
 365                 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) &&
 366                 (wasted_bits? FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1) : true) &&
 367                 FLAC__bitbuffer_write_raw_int32(bb, subframe->value, subframe_bps)
 368         ;
 369
 370         return ok;
 371 }
 372
 373 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 374 {
 375         unsigned i;
 376
 377         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))
 378                 return false;
 379         if(wasted_bits)
 380                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 381                         return false;
 382
 383         for(i = 0; i < subframe->order; i++)
 384                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 385                         return false;
 386
 387         if(!add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 388                 return false;
 389         switch(subframe->entropy_coding_method.type) {
 390                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 391                         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))
 392                                 return false;
 393                         break;
 394                 default:
 395                         FLAC__ASSERT(0);
 396         }
 397
 398         return true;
 399 }
 400
 401 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 402 {
 403         unsigned i;
 404
 405         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))
 406                 return false;
 407         if(wasted_bits)
 408                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 409                         return false;
 410
 411         for(i = 0; i < subframe->order; i++)
 412                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->warmup[i], subframe_bps))
 413                         return false;
 414
 415         if(!FLAC__bitbuffer_write_raw_uint32(bb, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
 416                 return false;
 417         if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
 418                 return false;
 419         for(i = 0; i < subframe->order; i++)
 420                 if(!FLAC__bitbuffer_write_raw_int32(bb, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
 421                         return false;
 422
 423         if(!add_entropy_coding_method_(bb, &subframe->entropy_coding_method))
 424                 return false;
 425         switch(subframe->entropy_coding_method.type) {
 426                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 427                         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))
 428                                 return false;
 429                         break;
 430                 default:
 431                         FLAC__ASSERT(0);
 432         }
 433
 434         return true;
 435 }
 436
 437 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitBuffer *bb)
 438 {
 439         unsigned i;
 440         const FLAC__int32 *signal = subframe->data;
 441
 442         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))
 443                 return false;
 444         if(wasted_bits)
 445                 if(!FLAC__bitbuffer_write_unary_unsigned(bb, wasted_bits-1))
 446                         return false;
 447
 448         for(i = 0; i < samples; i++)
 449                 if(!FLAC__bitbuffer_write_raw_int32(bb, signal[i], subframe_bps))
 450                         return false;
 451
 452         return true;
 453 }
 454
 455 FLAC__bool add_entropy_coding_method_(FLAC__BitBuffer *bb, const FLAC__EntropyCodingMethod *method)
 456 {
 457         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
 458                 return false;
 459         switch(method->type) {
 460                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 461                         if(!FLAC__bitbuffer_write_raw_uint32(bb, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 462                                 return false;
 463                         break;
 464                 default:
 465                         FLAC__ASSERT(0);
 466         }
 467         return true;
 468 }
 469
 470 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)
 471 {
 472         if(partition_order == 0) {
 473                 unsigned i;
 474
 475                 if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 476                         return false;
 477                 if(rice_parameters[0] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 478                         for(i = 0; i < residual_samples; i++) {
 479                                 if(!FLAC__bitbuffer_write_rice_signed(bb, residual[i], rice_parameters[0]))
 480                                         return false;
 481                         }
 482                 }
 483                 else {
 484                         if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 485                                 return false;
 486                         for(i = 0; i < residual_samples; i++) {
 487                                 if(!FLAC__bitbuffer_write_raw_int32(bb, residual[i], raw_bits[0]))
 488                                         return false;
 489                         }
 490                 }
 491                 return true;
 492         }
 493         else {
 494                 unsigned i, j, k = 0, k_last = 0;
 495                 unsigned partition_samples;
 496                 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
 497                 for(i = 0; i < (1u<<partition_order); i++) {
 498                         if(!FLAC__bitbuffer_write_raw_uint32(bb, rice_parameters[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN))
 499                                 return false;
 500                         partition_samples = default_partition_samples;
 501                         if(i == 0)
 502                                 partition_samples -= predictor_order;
 503                         k += partition_samples;
 504                         if(rice_parameters[i] < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
 505                                 for(j = k_last; j < k; j++) {
 506                                         if(!FLAC__bitbuffer_write_rice_signed(bb, residual[j], rice_parameters[i]))
 507                                                 return false;
 508                                 }
 509                         }
 510                         else {
 511                                 if(!FLAC__bitbuffer_write_raw_uint32(bb, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 512                                         return false;
 513                                 for(j = k_last; j < k; j++) {
 514                                         if(!FLAC__bitbuffer_write_raw_int32(bb, residual[j], raw_bits[i]))
 515                                                 return false;
 516                                 }
 517                         }
 518                         k_last = k;
 519                 }
 520                 return true;
 521         }
 522 }