1/* libFLAC - Free Lossless Audio Codec library 2 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 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 47static FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method); 48static 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); 49 50FLAC__bool FLAC__add_metadata_block(const FLAC__StreamMetadata *metadata, FLAC__BitWriter *bw) 51{ 52 unsigned i, j; 53 const unsigned vendor_string_length = (unsigned)strlen(FLAC__VENDOR_STRING); 54 55 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->is_last, FLAC__STREAM_METADATA_IS_LAST_LEN)) 56 return false; 57 58 if(!FLAC__bitwriter_write_raw_uint32(bw, 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__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 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN)) 100 return false; 101 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.stream_info.md5sum, 16)) 102 return false; 103 break; 104 case FLAC__METADATA_TYPE_PADDING: 105 if(!FLAC__bitwriter_write_zeroes(bw, metadata->length * 8)) 106 return false; 107 break; 108 case FLAC__METADATA_TYPE_APPLICATION: 109 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8)) 110 return false; 111 if(!FLAC__bitwriter_write_byte_block(bw, 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__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].sample_number, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN)) 117 return false; 118 if(!FLAC__bitwriter_write_raw_uint64(bw, metadata->data.seek_table.points[i].stream_offset, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN)) 119 return false; 120 if(!FLAC__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint32_little_endian(bw, vendor_string_length)) 126 return false; 127 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)FLAC__VENDOR_STRING, vendor_string_length)) 128 return false; 129 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.num_comments)) 130 return false; 131 for(i = 0; i < metadata->data.vorbis_comment.num_comments; i++) { 132 if(!FLAC__bitwriter_write_raw_uint32_little_endian(bw, metadata->data.vorbis_comment.comments[i].length)) 133 return false; 134 if(!FLAC__bitwriter_write_byte_block(bw, 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__bitwriter_write_byte_block(bw, (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__bitwriter_write_raw_uint64(bw, metadata->data.cue_sheet.lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN)) 143 return false; 144 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.cue_sheet.is_cd? 1 : 0, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN)) 145 return false; 146 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN)) 147 return false; 148 if(!FLAC__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint64(bw, track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN)) 154 return false; 155 if(!FLAC__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_byte_block(bw, (const FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8)) 159 return false; 160 if(!FLAC__bitwriter_write_raw_uint32(bw, track->type, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN)) 161 return false; 162 if(!FLAC__bitwriter_write_raw_uint32(bw, track->pre_emphasis, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN)) 163 return false; 164 if(!FLAC__bitwriter_write_zeroes(bw, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN)) 165 return false; 166 if(!FLAC__bitwriter_write_raw_uint32(bw, 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__bitwriter_write_raw_uint64(bw, index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN)) 172 return false; 173 if(!FLAC__bitwriter_write_raw_uint32(bw, index->number, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN)) 174 return false; 175 if(!FLAC__bitwriter_write_zeroes(bw, 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__bitwriter_write_raw_uint32(bw, metadata->data.picture.type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN)) 184 return false; 185 len = strlen(metadata->data.picture.mime_type); 186 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN)) 187 return false; 188 if(!FLAC__bitwriter_write_byte_block(bw, (const FLAC__byte*)metadata->data.picture.mime_type, len)) 189 return false; 190 len = strlen((const char *)metadata->data.picture.description); 191 if(!FLAC__bitwriter_write_raw_uint32(bw, len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN)) 192 return false; 193 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.description, len)) 194 return false; 195 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN)) 196 return false; 197 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN)) 198 return false; 199 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN)) 200 return false; 201 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN)) 202 return false; 203 if(!FLAC__bitwriter_write_raw_uint32(bw, metadata->data.picture.data_length, FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN)) 204 return false; 205 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.picture.data, metadata->data.picture.data_length)) 206 return false; 207 } 208 break; 209 default: 210 if(!FLAC__bitwriter_write_byte_block(bw, metadata->data.unknown.data, metadata->length)) 211 return false; 212 break; 213 } 214 215 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw)); 216 return true; 217} 218 219FLAC__bool FLAC__frame_add_header(const FLAC__FrameHeader *header, FLAC__BitWriter *bw) 220{ 221 unsigned u, blocksize_hint, sample_rate_hint; 222 FLAC__byte crc; 223 224 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(bw)); 225 226 if(!FLAC__bitwriter_write_raw_uint32(bw, FLAC__FRAME_HEADER_SYNC, FLAC__FRAME_HEADER_SYNC_LEN)) 227 return false; 228 229 if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_RESERVED_LEN)) 230 return false; 231 232 if(!FLAC__bitwriter_write_raw_uint32(bw, (header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER)? 0 : 1, FLAC__FRAME_HEADER_BLOCKING_STRATEGY_LEN)) 233 return false; 234 235 FLAC__ASSERT(header->blocksize > 0 && header->blocksize <= FLAC__MAX_BLOCK_SIZE); 236 /* when this assertion holds true, any legal blocksize can be expressed in the frame header */ 237 FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535u); 238 blocksize_hint = 0; 239 switch(header->blocksize) { 240 case 192: u = 1; break; 241 case 576: u = 2; break; 242 case 1152: u = 3; break; 243 case 2304: u = 4; break; 244 case 4608: u = 5; break; 245 case 256: u = 8; break; 246 case 512: u = 9; break; 247 case 1024: u = 10; break; 248 case 2048: u = 11; break; 249 case 4096: u = 12; break; 250 case 8192: u = 13; break; 251 case 16384: u = 14; break; 252 case 32768: u = 15; break; 253 default: 254 if(header->blocksize <= 0x100) 255 blocksize_hint = u = 6; 256 else 257 blocksize_hint = u = 7; 258 break; 259 } 260 if(!FLAC__bitwriter_write_raw_uint32(bw, 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 88200: u = 1; break; 267 case 176400: u = 2; break; 268 case 192000: u = 3; break; 269 case 8000: u = 4; break; 270 case 16000: u = 5; break; 271 case 22050: u = 6; break; 272 case 24000: u = 7; break; 273 case 32000: u = 8; break; 274 case 44100: u = 9; break; 275 case 48000: u = 10; break; 276 case 96000: u = 11; break; 277 default: 278 if(header->sample_rate <= 255000 && header->sample_rate % 1000 == 0) 279 sample_rate_hint = u = 12; 280 else if(header->sample_rate % 10 == 0) 281 sample_rate_hint = u = 14; 282 else if(header->sample_rate <= 0xffff) 283 sample_rate_hint = u = 13; 284 else 285 u = 0; 286 break; 287 } 288 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_SAMPLE_RATE_LEN)) 289 return false; 290 291 FLAC__ASSERT(header->channels > 0 && header->channels <= (1u << FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN) && header->channels <= FLAC__MAX_CHANNELS); 292 switch(header->channel_assignment) { 293 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: 294 u = header->channels - 1; 295 break; 296 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: 297 FLAC__ASSERT(header->channels == 2); 298 u = 8; 299 break; 300 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: 301 FLAC__ASSERT(header->channels == 2); 302 u = 9; 303 break; 304 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: 305 FLAC__ASSERT(header->channels == 2); 306 u = 10; 307 break; 308 default: 309 FLAC__ASSERT(0); 310 } 311 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN)) 312 return false; 313 314 FLAC__ASSERT(header->bits_per_sample > 0 && header->bits_per_sample <= (1u << FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN)); 315 switch(header->bits_per_sample) { 316 case 8 : u = 1; break; 317 case 12: u = 2; break; 318 case 16: u = 4; break; 319 case 20: u = 5; break; 320 case 24: u = 6; break; 321 default: u = 0; break; 322 } 323 if(!FLAC__bitwriter_write_raw_uint32(bw, u, FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN)) 324 return false; 325 326 if(!FLAC__bitwriter_write_raw_uint32(bw, 0, FLAC__FRAME_HEADER_ZERO_PAD_LEN)) 327 return false; 328 329 if(header->number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) { 330 if(!FLAC__bitwriter_write_utf8_uint32(bw, header->number.frame_number)) 331 return false; 332 } 333 else { 334 if(!FLAC__bitwriter_write_utf8_uint64(bw, header->number.sample_number)) 335 return false; 336 } 337 338 if(blocksize_hint) 339 if(!FLAC__bitwriter_write_raw_uint32(bw, header->blocksize-1, (blocksize_hint==6)? 8:16)) 340 return false; 341 342 switch(sample_rate_hint) { 343 case 12: 344 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 1000, 8)) 345 return false; 346 break; 347 case 13: 348 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate, 16)) 349 return false; 350 break; 351 case 14: 352 if(!FLAC__bitwriter_write_raw_uint32(bw, header->sample_rate / 10, 16)) 353 return false; 354 break; 355 } 356 357 /* write the CRC */ 358 if(!FLAC__bitwriter_get_write_crc8(bw, &crc)) 359 return false; 360 if(!FLAC__bitwriter_write_raw_uint32(bw, crc, FLAC__FRAME_HEADER_CRC_LEN)) 361 return false; 362 363 return true; 364} 365 366FLAC__bool FLAC__subframe_add_constant(const FLAC__Subframe_Constant *subframe, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) 367{ 368 FLAC__bool ok; 369 370 ok = 371 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) && 372 (wasted_bits? FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1) : true) && 373 FLAC__bitwriter_write_raw_int32(bw, subframe->value, subframe_bps) 374 ; 375 376 return ok; 377} 378 379FLAC__bool FLAC__subframe_add_fixed(const FLAC__Subframe_Fixed *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) 380{ 381 unsigned i; 382 383 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)) 384 return false; 385 if(wasted_bits) 386 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1)) 387 return false; 388 389 for(i = 0; i < subframe->order; i++) 390 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps)) 391 return false; 392 393 if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method)) 394 return false; 395 switch(subframe->entropy_coding_method.type) { 396 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: 397 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2: 398 if(!add_residual_partitioned_rice_( 399 bw, 400 subframe->residual, 401 residual_samples, 402 subframe->order, 403 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters, 404 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits, 405 subframe->entropy_coding_method.data.partitioned_rice.order, 406 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 407 )) 408 return false; 409 break; 410 default: 411 FLAC__ASSERT(0); 412 } 413 414 return true; 415} 416 417FLAC__bool FLAC__subframe_add_lpc(const FLAC__Subframe_LPC *subframe, unsigned residual_samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) 418{ 419 unsigned i; 420 421 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)) 422 return false; 423 if(wasted_bits) 424 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1)) 425 return false; 426 427 for(i = 0; i < subframe->order; i++) 428 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->warmup[i], subframe_bps)) 429 return false; 430 431 if(!FLAC__bitwriter_write_raw_uint32(bw, subframe->qlp_coeff_precision-1, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN)) 432 return false; 433 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->quantization_level, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN)) 434 return false; 435 for(i = 0; i < subframe->order; i++) 436 if(!FLAC__bitwriter_write_raw_int32(bw, subframe->qlp_coeff[i], subframe->qlp_coeff_precision)) 437 return false; 438 439 if(!add_entropy_coding_method_(bw, &subframe->entropy_coding_method)) 440 return false; 441 switch(subframe->entropy_coding_method.type) { 442 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: 443 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2: 444 if(!add_residual_partitioned_rice_( 445 bw, 446 subframe->residual, 447 residual_samples, 448 subframe->order, 449 subframe->entropy_coding_method.data.partitioned_rice.contents->parameters, 450 subframe->entropy_coding_method.data.partitioned_rice.contents->raw_bits, 451 subframe->entropy_coding_method.data.partitioned_rice.order, 452 /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 453 )) 454 return false; 455 break; 456 default: 457 FLAC__ASSERT(0); 458 } 459 460 return true; 461} 462 463FLAC__bool FLAC__subframe_add_verbatim(const FLAC__Subframe_Verbatim *subframe, unsigned samples, unsigned subframe_bps, unsigned wasted_bits, FLAC__BitWriter *bw) 464{ 465 unsigned i; 466 const FLAC__int32 *signal = subframe->data; 467 468 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)) 469 return false; 470 if(wasted_bits) 471 if(!FLAC__bitwriter_write_unary_unsigned(bw, wasted_bits-1)) 472 return false; 473 474 for(i = 0; i < samples; i++) 475 if(!FLAC__bitwriter_write_raw_int32(bw, signal[i], subframe_bps)) 476 return false; 477 478 return true; 479} 480 481FLAC__bool add_entropy_coding_method_(FLAC__BitWriter *bw, const FLAC__EntropyCodingMethod *method) 482{ 483 if(!FLAC__bitwriter_write_raw_uint32(bw, method->type, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN)) 484 return false; 485 switch(method->type) { 486 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: 487 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2: 488 if(!FLAC__bitwriter_write_raw_uint32(bw, method->data.partitioned_rice.order, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN)) 489 return false; 490 break; 491 default: 492 FLAC__ASSERT(0); 493 } 494 return true; 495} 496 497FLAC__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) 498{ 499 const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; 500 const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER; 501 502 if(partition_order == 0) { 503 unsigned i; 504 505 if(raw_bits[0] == 0) { 506 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[0], plen)) 507 return false; 508 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual, residual_samples, rice_parameters[0])) 509 return false; 510 } 511 else { 512 FLAC__ASSERT(rice_parameters[0] == 0); 513 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen)) 514 return false; 515 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[0], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN)) 516 return false; 517 for(i = 0; i < residual_samples; i++) { 518 if(!FLAC__bitwriter_write_raw_int32(bw, residual[i], raw_bits[0])) 519 return false; 520 } 521 } 522 return true; 523 } 524 else { 525 unsigned i, j, k = 0, k_last = 0; 526 unsigned partition_samples; 527 const unsigned default_partition_samples = (residual_samples+predictor_order) >> partition_order; 528 for(i = 0; i < (1u<<partition_order); i++) { 529 partition_samples = default_partition_samples; 530 if(i == 0) 531 partition_samples -= predictor_order; 532 k += partition_samples; 533 if(raw_bits[i] == 0) { 534 if(!FLAC__bitwriter_write_raw_uint32(bw, rice_parameters[i], plen)) 535 return false; 536 if(!FLAC__bitwriter_write_rice_signed_block(bw, residual+k_last, k-k_last, rice_parameters[i])) 537 return false; 538 } 539 else { 540 if(!FLAC__bitwriter_write_raw_uint32(bw, pesc, plen)) 541 return false; 542 if(!FLAC__bitwriter_write_raw_uint32(bw, raw_bits[i], FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN)) 543 return false; 544 for(j = k_last; j < k; j++) { 545 if(!FLAC__bitwriter_write_raw_int32(bw, residual[j], raw_bits[i])) 546 return false; 547 } 548 } 549 k_last = k; 550 } 551 return true; 552 } 553} 554