1 /* libFLAC - Free Lossless Audio Codec library 2 * Copyright (C) 2000-2009 Josh Coalson 3 * Copyright (C) 2011-2014 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 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 } 550
