src/libFLAC/stream_encoder_framing.c

   1 /* libFLAC - Free Lossless Audio Codec library
   2  * Copyright (C) 2000-2009  Josh Coalson
   3  * Copyright (C) 2011-2013  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 #if 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
  43 static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method);
  44 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);
  45
  46 FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw)
  47 {
  48         unsigned i, j;
  49         const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING);
  50
  51         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN))
  52                 return false;
  53
  54         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->type, FLAC__STREAM_METADATA_TYPE_LEN))
  55                 return false;
  56
  57         /*
  58          * First, for VORBIS_COMMENTs, adjust the length to reflect our vendor string
  59          */
  60         i = metadata->length;
  61         if(metadata->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
  62                 FLAC__ASSERT(metadata->data.vorbis_comment.vendor_string.length == 0 || 0 != metadata->data.vorbis_comment.vendor_string.entry);
  63                 i -= metadata->data.vorbis_comment.vendor_string.length;
  64                 i += vendor_string_length;
  65         }
  66         FLAC__ASSERT(i < (1u << FLAC__STREAM_METADATA_LENGTH_LEN));
  67         if(!FLAC__bitwriter_write_raw_uint32(bw, i, FLAC__STREAM_METADATA_LENGTH_LEN))
  68                 return false;
  69
  70         switch(metadata->type) {
  71                 case FLAC__METADATA_TYPE_STREAMINFO:
  72                         FLAC__ASSERT(metadata->data.stream_info.min_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN));
  73                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN))
  74                                 return false;
  75                         FLAC__ASSERT(metadata->data.stream_info.max_blocksize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN));
  76                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_blocksize, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
  77                                 return false;
  78                         FLAC__ASSERT(metadata->data.stream_info.min_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN));
  79                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.min_framesize, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
  80                                 return false;
  81                         FLAC__ASSERT(metadata->data.stream_info.max_framesize < (1u << FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN));
  82                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.max_framesize, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
  83                                 return false;
  84                         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(metadata->data.stream_info.sample_rate));
  85                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.sample_rate, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
  86                                 return false;
  87                         FLAC__ASSERT(metadata->data.stream_info.channels > 0);
  88                         FLAC__ASSERT(metadata->data.stream_info.channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN));
  89                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.channels-1, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
  90                                 return false;
  91                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample > 0);
  92                         FLAC__ASSERT(metadata->data.stream_info.bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
  93                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.stream_info.bits_per_sample-1, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
  94                                 return false;
  95                         if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
  96                                 return false;
  97                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16))
  98                                 return false;
  99                         break;
 100                 case FLAC__METADATA_TYPE_PADDING:
 101                         if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8))
 102                                 return false;
 103                         break;
 104                 case FLAC__METADATA_TYPE_APPLICATION:
 105                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8))
 106                                 return false;
 107                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.data, metadata->length - (FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)))
 108                                 return false;
 109                         break;
 110                 case FLAC__METADATA_TYPE_SEEKTABLE:
 111                         for(i = 0; i < metadata->data.seek_table.num_points; i++) {
 112                                 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
 113                                         return false;
 114                                 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
 115                                         return false;
 116                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.seek_table.points[i].frame_samples, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
 117                                         return false;
 118                         }
 119                         break;
 120                 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
 121                         if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length))
 122                                 return false;
 123                         if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length))
 124                                 return false;
 125                         if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments))
 126                                 return false;
 127                         for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) {
 128                                 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length))
 129                                         return false;
 130                                 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.vorbis_comment.comments[i].entry, metadata->data.vorbis_comment.comments[i].length))
 131                                         return false;
 132                         }
 133                         break;
 134                 case FLAC__METADATA_TYPE_CUESHEET:
 135                         FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
 136                         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))
 137                                 return false;
 138                         if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
 139                                 return false;
 140                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
 141                                 return false;
 142                         if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
 143                                 return false;
 144                         if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.num_tracks, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
 145                                 return false;
 146                         for(i = 0; i < metadata->data.cue_sheet.num_tracks; i++) {
 147                                 const FLAC__StreamMetadata_CueSheet_Track *track = metadata->data.cue_sheet.tracks + i;
 148
 149                                 if(!FLAC__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
 150                                         return false;
 151                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->number, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
 152                                         return false;
 153                                 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
 154                                 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
 155                                         return false;
 156                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
 157                                         return false;
 158                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
 159                                         return false;
 160                                 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
 161                                         return false;
 162                                 if(!FLAC__bitwriter_write_raw_uint32(bw, track->num_indices, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
 163                                         return false;
 164                                 for(j = 0; j < track->num_indices; j++) {
 165                                         const FLAC__StreamMetadata_CueSheet_Index *indx = track->indices + j;
 166
 167                                         if(!FLAC__bitwriter_write_raw_uint64(bw, indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
 168                                                 return false;
 169                                         if(!FLAC__bitwriter_write_raw_uint32(bw, indx->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
 170                                                 return false;
 171                                         if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
 172                                                 return false;
 173                                 }
 174                         }
 175                         break;
 176                 case FLAC__METADATA_TYPE_PICTURE:
 177                         {
 178                                 size_t len;
 179                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
 180                                         return false;
 181                                 len = strlen(metadata->data.picture.mime_type);
 182                                 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
 183                                         return false;
 184                                 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len))
 185                                         return false;
 186                                 len = strlen((const char *)metadata->data.picture.description);
 187                                 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
 188                                         return false;
 189                                 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len))
 190                                         return false;
 191                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
 192                                         return false;
 193                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
 194                                         return false;
 195                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
 196                                         return false;
 197                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
 198                                         return false;
 199                                 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
 200                                         return false;
 201                                 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length))
 202                                         return false;
 203                         }
 204                         break;
 205                 default:
 206                         if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length))
 207                                 return false;
 208                         break;
 209         }
 210
 211         FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
 212         return true;
 213 }
 214
 215 FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw)
 216 {
 217         unsigned u, blocksize_hint, sample_rate_hint;
 218         FLAC__byte crc;
 219
 220         FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw));
 221
 222         if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN))
 223                 return false;
 224
 225         if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN))
 226                 return false;
 227
 228         if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_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
 253                                 blocksize_hint = u = 7;
 254                         break;
 255         }
 256         if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BLOCK_SIZE_LEN))
 257                 return false;
 258
 259         FLAC__ASSERT(FLAC__format_sample_rate_is_valid(header->sample_rate));
 260         sample_rate_hint = 0;
 261         switch(header->sample_rate) {
 262                 case  88200: u = 1; break;
 263                 case 176400: u = 2; break;
 264                 case 192000: u = 3; break;
 265                 case   8000: u = 4; break;
 266                 case  16000: u = 5; break;
 267                 case  22050: u = 6; break;
 268                 case  24000: u = 7; break;
 269                 case  32000: u = 8; break;
 270                 case  44100: u = 9; break;
 271                 case  48000: u = 10; break;
 272                 case  96000: u = 11; break;
 273                 default:
 274                         if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0)
 275                                 sample_rate_hint = u = 12;
 276                         else if(header->sample_rate % 10 == 0)
 277                                 sample_rate_hint = u = 14;
 278                         else if(header->sample_rate <= 0xffff)
 279                                 sample_rate_hint = u = 13;
 280                         else
 281                                 u = 0;
 282                         break;
 283         }
 284         if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN))
 285                 return false;
 286
 287         FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS);
 288         switch(header->channel_assignment) {
 289                 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
 290                         u = header->channels - 1;
 291                         break;
 292                 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
 293                         FLAC__ASSERT(header->channels == 2);
 294                         u = 8;
 295                         break;
 296                 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
 297                         FLAC__ASSERT(header->channels == 2);
 298                         u = 9;
 299                         break;
 300                 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
 301                         FLAC__ASSERT(header->channels == 2);
 302                         u = 10;
 303                         break;
 304                 default:
 305                         FLAC__ASSERT(0);
 306         }
 307         if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN))
 308                 return false;
 309
 310         FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN));
 311         switch(header->bits_per_sample) {
 312                 case 8 : u = 1; break;
 313                 case 12: u = 2; break;
 314                 case 16: u = 4; break;
 315                 case 20: u = 5; break;
 316                 case 24: u = 6; break;
 317                 default: u = 0; break;
 318         }
 319         if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN))
 320                 return false;
 321
 322         if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN))
 323                 return false;
 324
 325         if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
 326                 if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number))
 327                         return false;
 328         }
 329         else {
 330                 if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number))
 331                         return false;
 332         }
 333
 334         if(blocksize_hint)
 335                 if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16))
 336                         return false;
 337
 338         switch(sample_rate_hint) {
 339                 case 12:
 340                         if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8))
 341                                 return false;
 342                         break;
 343                 case 13:
 344                         if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16))
 345                                 return false;
 346                         break;
 347                 case 14:
 348                         if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16))
 349                                 return false;
 350                         break;
 351         }
 352
 353         /* write the CRC */
 354         if(!FLAC__bitwriter_get_write_crc8(bw, &crc))
 355                 return false;
 356         if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN))
 357                 return false;
 358
 359         return true;
 360 }
 361
 362 FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 363 {
 364         FLAC__bool ok;
 365
 366         ok =
 367                 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) &&
 368                 (wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) &&
 369                 FLAC__bitwriter_write_raw_int32(bw, subframe->value, subframe_bps)
 370         ;
 371
 372         return ok;
 373 }
 374
 375 FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 376 {
 377         unsigned i;
 378
 379         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))
 380                 return false;
 381         if(wasted_bits)
 382                 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
 383                         return false;
 384
 385         for(i = 0; i < subframe->order; i++)
 386                 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
 387                         return false;
 388
 389         if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
 390                 return false;
 391         switch(subframe->entropy_coding_method.type) {
 392                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 393                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
 394                         if(!add_residual_partitioned_rice_(
 395                                 bw,
 396                                 subframe->residual,
 397                                 residual_samples,
 398                                 subframe->order,
 399                                 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
 400                                 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
 401                                 subframe->entropy_coding_method.data.partitioned_rice.order,
 402                                 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
 403                         ))
 404                                 return false;
 405                         break;
 406                 default:
 407                         FLAC__ASSERT(0);
 408         }
 409
 410         return true;
 411 }
 412
 413 FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 414 {
 415         unsigned i;
 416
 417         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))
 418                 return false;
 419         if(wasted_bits)
 420                 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
 421                         return false;
 422
 423         for(i = 0; i < subframe->order; i++)
 424                 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps))
 425                         return false;
 426
 427         if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
 428                 return false;
 429         if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
 430                 return false;
 431         for(i = 0; i < subframe->order; i++)
 432                 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision))
 433                         return false;
 434
 435         if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method))
 436                 return false;
 437         switch(subframe->entropy_coding_method.type) {
 438                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 439                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
 440                         if(!add_residual_partitioned_rice_(
 441                                 bw,
 442                                 subframe->residual,
 443                                 residual_samples,
 444                                 subframe->order,
 445                                 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters,
 446                                 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits,
 447                                 subframe->entropy_coding_method.data.partitioned_rice.order,
 448                                 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
 449                         ))
 450                                 return false;
 451                         break;
 452                 default:
 453                         FLAC__ASSERT(0);
 454         }
 455
 456         return true;
 457 }
 458
 459 FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw)
 460 {
 461         unsigned i;
 462         const FLAC__int32 *signal = subframe->data;
 463
 464         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))
 465                 return false;
 466         if(wasted_bits)
 467                 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1))
 468                         return false;
 469
 470         for(i = 0; i < samples; i++)
 471                 if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps))
 472                         return false;
 473
 474         return true;
 475 }
 476
 477 FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method)
 478 {
 479         if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
 480                 return false;
 481         switch(method->type) {
 482                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
 483                 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
 484                         if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
 485                                 return false;
 486                         break;
 487                 default:
 488                         FLAC__ASSERT(0);
 489         }
 490         return true;
 491 }
 492
 493 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)
 494 {
 495         const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
 496         const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
 497
 498         if(partition_order == 0) {
 499                 unsigned i;
 500
 501                 if(raw_bits[0] == 0) {
 502                         if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen))
 503                                 return false;
 504                         if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0]))
 505                                 return false;
 506                 }
 507                 else {
 508                         FLAC__ASSERT(rice_parameters[0] == 0);
 509                         if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
 510                                 return false;
 511                         if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 512                                 return false;
 513                         for(i = 0; i < residual_samples; i++) {
 514                                 if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0]))
 515                                         return false;
 516                         }
 517                 }
 518                 return true;
 519         }
 520         else {
 521                 unsigned i, j, k = 0, k_last = 0;
 522                 unsigned partition_samples;
 523                 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order;
 524                 for(i = 0; i < (1u<<partition_order); i++) {
 525                         partition_samples = default_partition_samples;
 526                         if(i == 0)
 527                                 partition_samples -= predictor_order;
 528                         k += partition_samples;
 529                         if(raw_bits[i] == 0) {
 530                                 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen))
 531                                         return false;
 532                                 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i]))
 533                                         return false;
 534                         }
 535                         else {
 536                                 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen))
 537                                         return false;
 538                                 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
 539                                         return false;
 540                                 for(j = k_last; j < k; j++) {
 541                                         if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i]))
 542                                                 return false;
 543                                 }
 544                         }
 545                         k_last = k;
 546                 }
 547                 return true;
 548         }
 549 }