FLAC/src/stream_encoder_framing.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000-2009  Josh Coalson
   3  * Copyright (C) 2011-2016  Xiph.Org Foundation
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *
  12  * - Redistributions in binary form must reproduce the above copyright
  13  * notice, this list of conditions and the following disclaimer in the
  14  * documentation and/or other materials provided with the distribution.
  15  *
  16  * - Neither the name of the Xiph.org Foundation nor the names of its
  17  * contributors may be used to endorse or promote products derived from
  18  * this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifdef HAVE_CONFIG_H
  34 #  include <config.h>
  35 #endif
  36
  37 #include <stdio.h>
  38 #include <string.h> /* for strlen() */
  39 #include "private/stream_encoder_framing.h"
  40 #include "private/crc.h"
  41 #include "FLAC/assert.h"
  42 #include "share/compat.h"
  43
  44 static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method);
  45 static FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order, const FLAC__bool is_extended);
  46
  47 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw)
  48 {
  49         unsigned i, j;
  50         const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING);
  51
  52         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
  53                 return false;
  54
  55         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
  56                 return false;
  57
  58         /*
  59          * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
  60          */
  61         i = metadata->length;
  62         if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
  63                 FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
  64                 i -= metadata->data.vorbis_comment.vendor_string.length;
  65                 i += vendor_string_length;
  66         }
  67         FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
  68         /* double protection */
  69         if(i >= (1u << FLAC__STREAM_METADATA_LENGTH_LEN))
  70                 return false;
  71         if(!FLAC__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
  98                                 return false;
  99                         FLAC__ASSERT(metadata->data.stream_info.total_samples < (FLAC__U64L(1) << FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN));
 100                         if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
 101                                 return false;
 102                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16))
 103                                 return false;
 104                         break;
 105                 case FLAC__METADATA_TYPE_PADDING:
 106                         if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8))
 107                                 return false;
 108                         break;
 109                 case FLAC__METADATA_TYPE_APPLICATION:
 110                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
 111                                 return false;
 112                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
 113                                 return false;
 114                         break;
 115                 case FLAC__METADATA_TYPE_SEEKTABLE:
 116                         for(i = 0; i < metadata->data.seek_table.num_points; i++) {
 117                                 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
 118                                         return false;
 119                                 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
 120                                         return false;
 121                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
 122                                         return false;
 123                         }
 124                         break;
 125                 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
 126                         if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length))
 127                                 return false;
 128                         if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
 129                                 return false;
 130                         if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments))
 131                                 return false;
 132                         for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
 133                                 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length))
 134                                         return false;
 135                                 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
 136                                         return false;
 137                         }
 138                         break;
 139                 case FLAC__METADATA_TYPE_CUESHEET:
 140                         FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
 141                         if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.cue_sheet.media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8))
 142                                 return false;
 143                         if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
 144                                 return false;
 145                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
 146                                 return false;
 147                         if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
 148                                 return false;
 149                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
 150                                 return false;
 151                         for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
 152                                 const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;
 153
 154                                 if(!FLAC__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
 155                                         return false;
 156                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
 157                                         return false;
 158                                 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
 159                                 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
 160                                         return false;
 161                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
 162                                         return false;
 163                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
 164                                         return false;
 165                                 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
 166                                         return false;
 167                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
 168                                         return false;
 169                                 for(j = 0; j < track->num_indices; j++) {
 170                                         const FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
 171
 172                                         if(!FLAC__bitwriter_write_raw_uint64(bw, indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
 173                                                 return false;
 174                                         if(!FLAC__bitwriter_write_raw_uint32(bw, indx->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
 175                                                 return false;
 176                                         if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
 177                                                 return false;
 178                                 }
 179                         }
 180                         break;
 181                 case FLAC__METADATA_TYPE_PICTURE:
 182                         {
 183                                 size_t len;
 184                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
 185                                         return false;
 186                                 len = strlen(metadata->data.picture.mime_type);
 187                                 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
 188                                         return false;
 189                                 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len))
 190                                         return false;
 191                                 len = strlen((const char *)metadata->data.picture.description);
 192                                 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
 193                                         return false;
 194                                 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len))
 195                                         return false;
 196                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
 197                                         return false;
 198                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
 199                                         return false;
 200                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
 201                                         return false;
 202                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
 203                                         return false;
 204                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
 205                                         return false;
 206                                 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length))
 207                                         return false;
 208                         }
 209                         break;
 210                 default:
 211                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length))
 212                                 return false;
 213                         break;
 214         }
 215
 216         FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
 217         return true;
 218 }
 219
 220 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw)
 221 {
 222         unsigned u, blocksize_hint, sample_rate_hint;
 223         FLAC__byte crc;
 224
 225         FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
 226
 227         if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
 228                 return false;
 229
 230         if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
 231                 return false;
 232
 233         if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN))
 234                 return false;
 235
 236         FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE);
 237         /* when this assertion holds true, any legal blocksize can be expressed in the frame header */
 238         FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u);
 239         blocksize_hint = 0;
 240         switch(header->blocksize) {
 241                 case   192: u = 1; break;
 242                 case   576: u = 2; break;
 243                 case  1152: u = 3; break;
 244                 case  2304: u = 4; break;
 245                 case  4608: u = 5; break;
 246                 case   256: u = 8; break;
 247                 case   512: u = 9; break;
 248                 case  1024: u = 10; break;
 249                 case  2048: u = 11; break;
 250                 case  4096: u = 12; break;
 251                 case  8192: u = 13; break;
 252                 case 16384: u = 14; break;
 253                 case 32768: u = 15; break;
 254                 default:
 255                         if(header->blocksize <= 0x100)
 256                                 blocksize_hint = u = 6;
 257                         else
 258                                 blocksize_hint = u = 7;
 259                         break;
 260         }
 261         if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
 262                 return false;
 263
 264         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
 265         sample_rate_hint = 0;
 266         switch(header->sample_rate) {
 267                 case  88200: u = 1; break;
 268                 case 176400: u = 2; break;
 269                 case 192000: u = 3; break;
 270                 case   8000: u = 4; break;
 271                 case  16000: u = 5; break;
 272                 case  22050: u = 6; break;
 273                 case  24000: u = 7; break;
 274                 case  32000: u = 8; break;
 275                 case  44100: u = 9; break;
 276                 case  48000: u = 10; break;
 277                 case  96000: u = 11; break;
 278                 default:
 279                         if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0)
 280                                 sample_rate_hint = u = 12;
 281                         else if(header->sample_rate % 10 == 0)
 282                                 sample_rate_hint = u = 14;
 283                         else if(header->sample_rate <= 0xffff)
 284                                 sample_rate_hint = u = 13;
 285                         else
 286                                 u = 0;
 287                         break;
 288         }
 289         if(!FLAC__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
 325                 return false;
 326
 327         if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
 328                 return false;
 329
 330         if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
 331                 if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number))
 332                         return false;
 333         }
 334         else {
 335                 if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number))
 336                         return false;
 337         }
 338
 339         if(blocksize_hint)
 340                 if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16))
 341                         return false;
 342
 343         switch(sample_rate_hint) {
 344                 case 12:
 345                         if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8))
 346                                 return false;
 347                         break;
 348                 case 13:
 349                         if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16))
 350                                 return false;
 351                         break;
 352                 case 14:
 353                         if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16))
 354                                 return false;
 355                         break;
 356         }
 357
 358         /* write the CRC */
 359         if(!FLAC__bitwriter_get_write_crc8(bw, &crc))
 360                 return false;
 361         if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN))
 362                 return false;
 363
 364         return true;
 365 }
 366
 367 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 368 {
 369         FLAC__bool ok;
 370
 371         ok =
 372                 FLAC__bitwriter_write_raw_uint32(bw, 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) &&
 373                 (wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) &&
 374                 FLAC__bitwriter_write_raw_int32(bw, subframe->value, subframe_bps)
 375         ;
 376
 377         return ok;
 378 }
 379
 380 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 381 {
 382         unsigned i;
 383
 384         if(!FLAC__bitwriter_write_raw_uint32(bw, 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))
 385                 return false;
 386         if(wasted_bits)
 387                 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
 388                         return false;
 389
 390         for(i = 0; i < subframe->order; i++)
 391                 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
 392                         return false;
 393
 394         if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
 395                 return false;
 396         switch(subframe->entropy_coding_method.type) {
 397                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 398                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
 399                         if(!add_residual_partitioned_rice_(
 400                                 bw,
 401                                 subframe->residual,
 402                                 residual_samples,
 403                                 subframe->order,
 404                                 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
 405                                 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
 406                                 subframe->entropy_coding_method.data.partitioned_rice.order,
 407                                 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
 408                         ))
 409                                 return false;
 410                         break;
 411                 default:
 412                         FLAC__ASSERT(0);
 413         }
 414
 415         return true;
 416 }
 417
 418 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 419 {
 420         unsigned i;
 421
 422         if(!FLAC__bitwriter_write_raw_uint32(bw, 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))
 423                 return false;
 424         if(wasted_bits)
 425                 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
 426                         return false;
 427
 428         for(i = 0; i < subframe->order; i++)
 429                 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
 430                         return false;
 431
 432         if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
 433                 return false;
 434         if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
 435                 return false;
 436         for(i = 0; i < subframe->order; i++)
 437                 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
 438                         return false;
 439
 440         if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
 441                 return false;
 442         switch(subframe->entropy_coding_method.type) {
 443                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 444                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
 445                         if(!add_residual_partitioned_rice_(
 446                                 bw,
 447                                 subframe->residual,
 448                                 residual_samples,
 449                                 subframe->order,
 450                                 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
 451                                 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
 452                                 subframe->entropy_coding_method.data.partitioned_rice.order,
 453                                 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
 454                         ))
 455                                 return false;
 456                         break;
 457                 default:
 458                         FLAC__ASSERT(0);
 459         }
 460
 461         return true;
 462 }
 463
 464 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 465 {
 466         unsigned i;
 467         const FLAC__int32 *signal = subframe->data;
 468
 469         if(!FLAC__bitwriter_write_raw_uint32(bw, 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))
 470                 return false;
 471         if(wasted_bits)
 472                 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
 473                         return false;
 474
 475         for(i = 0; i < samples; i++)
 476                 if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps))
 477                         return false;
 478
 479         return true;
 480 }
 481
 482 FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method)
 483 {
 484         if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
 485                 return false;
 486         switch(method->type) {
 487                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 488                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
 489                         if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 490                                 return false;
 491                         break;
 492                 default:
 493                         FLAC__ASSERT(0);
 494         }
 495         return true;
 496 }
 497
 498 FLAC__bool add_residual_partitioned_rice_(FLAC__BitWriter *bw, const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned rice_parameters[], const unsigned raw_bits[], const unsigned partition_order, const FLAC__bool is_extended)
 499 {
 500         const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
 501         const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
 502
 503         if(partition_order == 0) {
 504                 unsigned i;
 505
 506                 if(raw_bits[0] == 0) {
 507                         if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen))
 508                                 return false;
 509                         if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0]))
 510                                 return false;
 511                 }
 512                 else {
 513                         FLAC__ASSERT(rice_parameters[0] == 0);
 514                         if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
 515                                 return false;
 516                         if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 517                                 return false;
 518                         for(i = 0; i < residual_samples; i++) {
 519                                 if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0]))
 520                                         return false;
 521                         }
 522                 }
 523                 return true;
 524         }
 525         else {
 526                 unsigned i, j, k = 0, k_last = 0;
 527                 unsigned partition_samples;
 528                 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
 529                 for(i = 0; i < (1u<<partition_order); i++) {
 530                         partition_samples = default_partition_samples;
 531                         if(i == 0)
 532                                 partition_samples -= predictor_order;
 533                         k += partition_samples;
 534                         if(raw_bits[i] == 0) {
 535                                 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen))
 536                                         return false;
 537                                 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i]))
 538                                         return false;
 539                         }
 540                         else {
 541                                 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
 542                                         return false;
 543                                 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 544                                         return false;
 545                                 for(j = k_last; j < k; j++) {
 546                                         if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i]))
 547                                                 return false;
 548                                 }
 549                         }
 550                         k_last = k;
 551                 }
 552                 return true;
 553         }
 554 }