1/* 2 * WAV demuxer 3 * Copyright (c) 2001, 2002 Fabrice Bellard 4 * 5 * Sony Wave64 demuxer 6 * RF64 demuxer 7 * Copyright (c) 2009 Daniel Verkamp 8 * 9 * This file is part of FFmpeg. 10 * 11 * FFmpeg is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Lesser General Public 13 * License as published by the Free Software Foundation; either 14 * version 2.1 of the License, or (at your option) any later version. 15 * 16 * FFmpeg is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * Lesser General Public License for more details. 20 * 21 * You should have received a copy of the GNU Lesser General Public 22 * License along with FFmpeg; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 24 */ 25 26#include <stdint.h> 27 28#include "libavutil/avassert.h" 29#include "libavutil/dict.h" 30#include "libavutil/intreadwrite.h" 31#include "libavutil/log.h" 32#include "libavutil/mathematics.h" 33#include "libavutil/opt.h" 34#include "avformat.h" 35#include "avio.h" 36#include "avio_internal.h" 37#include "internal.h" 38#include "metadata.h" 39#include "pcm.h" 40#include "riff.h" 41#include "w64.h" 42#include "spdif.h" 43 44typedef struct WAVDemuxContext { 45 const AVClass *class; 46 int64_t data_end; 47 int w64; 48 int64_t smv_data_ofs; 49 int smv_block_size; 50 int smv_frames_per_jpeg; 51 int smv_block; 52 int smv_last_stream; 53 int smv_eof; 54 int audio_eof; 55 int ignore_length; 56 int spdif; 57 int smv_cur_pt; 58 int smv_given_first; 59 int unaligned; // e.g. if an odd number of bytes ID3 tag was prepended 60} WAVDemuxContext; 61 62#if CONFIG_WAV_DEMUXER 63 64static int64_t next_tag(AVIOContext *pb, uint32_t *tag) 65{ 66 *tag = avio_rl32(pb); 67 return avio_rl32(pb); 68} 69 70/* RIFF chunks are always at even offsets relative to where they start. */ 71static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence) 72{ 73 offset += offset < INT64_MAX && offset + wav->unaligned & 1; 74 75 return avio_seek(s, offset, whence); 76} 77 78/* return the size of the found tag */ 79static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1) 80{ 81 unsigned int tag; 82 int64_t size; 83 84 for (;;) { 85 if (url_feof(pb)) 86 return AVERROR_EOF; 87 size = next_tag(pb, &tag); 88 if (tag == tag1) 89 break; 90 wav_seek_tag(wav, pb, size, SEEK_CUR); 91 } 92 return size; 93} 94 95static int wav_probe(AVProbeData *p) 96{ 97 /* check file header */ 98 if (p->buf_size <= 32) 99 return 0; 100 if (!memcmp(p->buf + 8, "WAVE", 4)) { 101 if (!memcmp(p->buf, "RIFF", 4)) 102 /* Since the ACT demuxer has a standard WAV header at the top of 103 * its own, the returned score is decreased to avoid a probe 104 * conflict between ACT and WAV. */ 105 return AVPROBE_SCORE_MAX - 1; 106 else if (!memcmp(p->buf, "RF64", 4) && 107 !memcmp(p->buf + 12, "ds64", 4)) 108 return AVPROBE_SCORE_MAX; 109 } 110 return 0; 111} 112 113static void handle_stream_probing(AVStream *st) 114{ 115 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) { 116 st->request_probe = AVPROBE_SCORE_EXTENSION; 117 st->probe_packets = FFMIN(st->probe_packets, 14); 118 } 119} 120 121static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st) 122{ 123 AVIOContext *pb = s->pb; 124 int ret; 125 126 /* parse fmt header */ 127 *st = avformat_new_stream(s, NULL); 128 if (!*st) 129 return AVERROR(ENOMEM); 130 131 ret = ff_get_wav_header(pb, (*st)->codec, size); 132 if (ret < 0) 133 return ret; 134 handle_stream_probing(*st); 135 136 (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; 137 138 avpriv_set_pts_info(*st, 64, 1, (*st)->codec->sample_rate); 139 140 return 0; 141} 142 143static inline int wav_parse_bext_string(AVFormatContext *s, const char *key, 144 int length) 145{ 146 char temp[257]; 147 int ret; 148 149 av_assert0(length <= sizeof(temp)); 150 if ((ret = avio_read(s->pb, temp, length)) < 0) 151 return ret; 152 153 temp[length] = 0; 154 155 if (strlen(temp)) 156 return av_dict_set(&s->metadata, key, temp, 0); 157 158 return 0; 159} 160 161static int wav_parse_bext_tag(AVFormatContext *s, int64_t size) 162{ 163 char temp[131], *coding_history; 164 int ret, x; 165 uint64_t time_reference; 166 int64_t umid_parts[8], umid_mask = 0; 167 168 if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 || 169 (ret = wav_parse_bext_string(s, "originator", 32)) < 0 || 170 (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 || 171 (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 || 172 (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0) 173 return ret; 174 175 time_reference = avio_rl64(s->pb); 176 snprintf(temp, sizeof(temp), "%"PRIu64, time_reference); 177 if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0) 178 return ret; 179 180 /* check if version is >= 1, in which case an UMID may be present */ 181 if (avio_rl16(s->pb) >= 1) { 182 for (x = 0; x < 8; x++) 183 umid_mask |= umid_parts[x] = avio_rb64(s->pb); 184 185 if (umid_mask) { 186 /* the string formatting below is per SMPTE 330M-2004 Annex C */ 187 if (umid_parts[4] == 0 && umid_parts[5] == 0 && 188 umid_parts[6] == 0 && umid_parts[7] == 0) { 189 /* basic UMID */ 190 snprintf(temp, sizeof(temp), 191 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64, 192 umid_parts[0], umid_parts[1], 193 umid_parts[2], umid_parts[3]); 194 } else { 195 /* extended UMID */ 196 snprintf(temp, sizeof(temp), 197 "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64 198 "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64, 199 umid_parts[0], umid_parts[1], 200 umid_parts[2], umid_parts[3], 201 umid_parts[4], umid_parts[5], 202 umid_parts[6], umid_parts[7]); 203 } 204 205 if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0) 206 return ret; 207 } 208 209 avio_skip(s->pb, 190); 210 } else 211 avio_skip(s->pb, 254); 212 213 if (size > 602) { 214 /* CodingHistory present */ 215 size -= 602; 216 217 if (!(coding_history = av_malloc(size + 1))) 218 return AVERROR(ENOMEM); 219 220 if ((ret = avio_read(s->pb, coding_history, size)) < 0) 221 return ret; 222 223 coding_history[size] = 0; 224 if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history, 225 AV_DICT_DONT_STRDUP_VAL)) < 0) 226 return ret; 227 } 228 229 return 0; 230} 231 232static const AVMetadataConv wav_metadata_conv[] = { 233 { "description", "comment" }, 234 { "originator", "encoded_by" }, 235 { "origination_date", "date" }, 236 { "origination_time", "creation_time" }, 237 { 0 }, 238}; 239 240/* wav input */ 241static int wav_read_header(AVFormatContext *s) 242{ 243 int64_t size, av_uninit(data_size); 244 int64_t sample_count = 0; 245 int rf64; 246 uint32_t tag; 247 AVIOContext *pb = s->pb; 248 AVStream *st = NULL; 249 WAVDemuxContext *wav = s->priv_data; 250 int ret, got_fmt = 0; 251 int64_t next_tag_ofs, data_ofs = -1; 252 253 wav->unaligned = avio_tell(s->pb) & 1; 254 255 wav->smv_data_ofs = -1; 256 257 /* check RIFF header */ 258 tag = avio_rl32(pb); 259 260 rf64 = tag == MKTAG('R', 'F', '6', '4'); 261 if (!rf64 && tag != MKTAG('R', 'I', 'F', 'F')) 262 return AVERROR_INVALIDDATA; 263 avio_rl32(pb); /* file size */ 264 tag = avio_rl32(pb); 265 if (tag != MKTAG('W', 'A', 'V', 'E')) 266 return AVERROR_INVALIDDATA; 267 268 if (rf64) { 269 if (avio_rl32(pb) != MKTAG('d', 's', '6', '4')) 270 return AVERROR_INVALIDDATA; 271 size = avio_rl32(pb); 272 if (size < 24) 273 return AVERROR_INVALIDDATA; 274 avio_rl64(pb); /* RIFF size */ 275 276 data_size = avio_rl64(pb); 277 sample_count = avio_rl64(pb); 278 279 if (data_size < 0 || sample_count < 0) { 280 av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in " 281 "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n", 282 data_size, sample_count); 283 return AVERROR_INVALIDDATA; 284 } 285 avio_skip(pb, size - 24); /* skip rest of ds64 chunk */ 286 287 } 288 289 for (;;) { 290 AVStream *vst; 291 size = next_tag(pb, &tag); 292 next_tag_ofs = avio_tell(pb) + size; 293 294 if (url_feof(pb)) 295 break; 296 297 switch (tag) { 298 case MKTAG('f', 'm', 't', ' '): 299 /* only parse the first 'fmt ' tag found */ 300 if (!got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) { 301 return ret; 302 } else if (got_fmt) 303 av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n"); 304 305 got_fmt = 1; 306 break; 307 case MKTAG('d', 'a', 't', 'a'): 308 if (!got_fmt) { 309 av_log(s, AV_LOG_ERROR, 310 "found no 'fmt ' tag before the 'data' tag\n"); 311 return AVERROR_INVALIDDATA; 312 } 313 314 if (rf64) { 315 next_tag_ofs = wav->data_end = avio_tell(pb) + data_size; 316 } else { 317 data_size = size; 318 next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX; 319 } 320 321 data_ofs = avio_tell(pb); 322 323 /* don't look for footer metadata if we can't seek or if we don't 324 * know where the data tag ends 325 */ 326 if (!pb->seekable || (!rf64 && !size)) 327 goto break_loop; 328 break; 329 case MKTAG('f', 'a', 'c', 't'): 330 if (!sample_count) 331 sample_count = avio_rl32(pb); 332 break; 333 case MKTAG('b', 'e', 'x', 't'): 334 if ((ret = wav_parse_bext_tag(s, size)) < 0) 335 return ret; 336 break; 337 case MKTAG('S','M','V','0'): 338 if (!got_fmt) { 339 av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n"); 340 return AVERROR_INVALIDDATA; 341 } 342 // SMV file, a wav file with video appended. 343 if (size != MKTAG('0','2','0','0')) { 344 av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n"); 345 goto break_loop; 346 } 347 av_log(s, AV_LOG_DEBUG, "Found SMV data\n"); 348 wav->smv_given_first = 0; 349 vst = avformat_new_stream(s, NULL); 350 if (!vst) 351 return AVERROR(ENOMEM); 352 avio_r8(pb); 353 vst->id = 1; 354 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; 355 vst->codec->codec_id = AV_CODEC_ID_SMVJPEG; 356 vst->codec->width = avio_rl24(pb); 357 vst->codec->height = avio_rl24(pb); 358 if (ff_alloc_extradata(vst->codec, 4)) { 359 av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n"); 360 return AVERROR(ENOMEM); 361 } 362 size = avio_rl24(pb); 363 wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3; 364 avio_rl24(pb); 365 wav->smv_block_size = avio_rl24(pb); 366 avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb)); 367 vst->duration = avio_rl24(pb); 368 avio_rl24(pb); 369 avio_rl24(pb); 370 wav->smv_frames_per_jpeg = avio_rl24(pb); 371 if (wav->smv_frames_per_jpeg > 65536) { 372 av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n"); 373 return AVERROR_INVALIDDATA; 374 } 375 AV_WL32(vst->codec->extradata, wav->smv_frames_per_jpeg); 376 wav->smv_cur_pt = 0; 377 goto break_loop; 378 case MKTAG('L', 'I', 'S', 'T'): 379 if (size < 4) { 380 av_log(s, AV_LOG_ERROR, "too short LIST tag\n"); 381 return AVERROR_INVALIDDATA; 382 } 383 switch (avio_rl32(pb)) { 384 case MKTAG('I', 'N', 'F', 'O'): 385 ff_read_riff_info(s, size - 4); 386 } 387 break; 388 } 389 390 /* seek to next tag unless we know that we'll run into EOF */ 391 if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) || 392 wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) { 393 break; 394 } 395 } 396 397break_loop: 398 if (data_ofs < 0) { 399 av_log(s, AV_LOG_ERROR, "no 'data' tag found\n"); 400 return AVERROR_INVALIDDATA; 401 } 402 403 avio_seek(pb, data_ofs, SEEK_SET); 404 405 if (data_size > 0 && sample_count && data_size / sample_count / st->codec->channels > 8) { 406 av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count); 407 sample_count = 0; 408 } 409 410 if (!sample_count || av_get_exact_bits_per_sample(st->codec->codec_id) > 0) 411 if ( st->codec->channels 412 && data_size 413 && av_get_bits_per_sample(st->codec->codec_id) 414 && wav->data_end <= avio_size(pb)) 415 sample_count = (data_size << 3) 416 / 417 (st->codec->channels * (uint64_t)av_get_bits_per_sample(st->codec->codec_id)); 418 419 if (sample_count) 420 st->duration = sample_count; 421 422 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv); 423 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); 424 425 return 0; 426} 427 428/** 429 * Find chunk with w64 GUID by skipping over other chunks. 430 * @return the size of the found chunk 431 */ 432static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16]) 433{ 434 uint8_t guid[16]; 435 int64_t size; 436 437 while (!url_feof(pb)) { 438 avio_read(pb, guid, 16); 439 size = avio_rl64(pb); 440 if (size <= 24) 441 return AVERROR_INVALIDDATA; 442 if (!memcmp(guid, guid1, 16)) 443 return size; 444 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24); 445 } 446 return AVERROR_EOF; 447} 448 449#define MAX_SIZE 4096 450 451static int wav_read_packet(AVFormatContext *s, AVPacket *pkt) 452{ 453 int ret, size; 454 int64_t left; 455 AVStream *st; 456 WAVDemuxContext *wav = s->priv_data; 457 458 if (CONFIG_SPDIF_DEMUXER && wav->spdif == 0 && 459 s->streams[0]->codec->codec_tag == 1) { 460 enum AVCodecID codec; 461 ret = ff_spdif_probe(s->pb->buffer, s->pb->buf_end - s->pb->buffer, 462 &codec); 463 if (ret > AVPROBE_SCORE_EXTENSION) { 464 s->streams[0]->codec->codec_id = codec; 465 wav->spdif = 1; 466 } else { 467 wav->spdif = -1; 468 } 469 } 470 if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1) 471 return ff_spdif_read_packet(s, pkt); 472 473 if (wav->smv_data_ofs > 0) { 474 int64_t audio_dts, video_dts; 475smv_retry: 476 audio_dts = (int32_t)s->streams[0]->cur_dts; 477 video_dts = (int32_t)s->streams[1]->cur_dts; 478 479 if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) { 480 /*We always return a video frame first to get the pixel format first*/ 481 wav->smv_last_stream = wav->smv_given_first ? 482 av_compare_ts(video_dts, s->streams[1]->time_base, 483 audio_dts, s->streams[0]->time_base) > 0 : 0; 484 wav->smv_given_first = 1; 485 } 486 wav->smv_last_stream = !wav->smv_last_stream; 487 wav->smv_last_stream |= wav->audio_eof; 488 wav->smv_last_stream &= !wav->smv_eof; 489 if (wav->smv_last_stream) { 490 uint64_t old_pos = avio_tell(s->pb); 491 uint64_t new_pos = wav->smv_data_ofs + 492 wav->smv_block * wav->smv_block_size; 493 if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) { 494 ret = AVERROR_EOF; 495 goto smv_out; 496 } 497 size = avio_rl24(s->pb); 498 ret = av_get_packet(s->pb, pkt, size); 499 if (ret < 0) 500 goto smv_out; 501 pkt->pos -= 3; 502 pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt; 503 wav->smv_cur_pt++; 504 if (wav->smv_frames_per_jpeg > 0) 505 wav->smv_cur_pt %= wav->smv_frames_per_jpeg; 506 if (!wav->smv_cur_pt) 507 wav->smv_block++; 508 509 pkt->stream_index = 1; 510smv_out: 511 avio_seek(s->pb, old_pos, SEEK_SET); 512 if (ret == AVERROR_EOF) { 513 wav->smv_eof = 1; 514 goto smv_retry; 515 } 516 return ret; 517 } 518 } 519 520 st = s->streams[0]; 521 522 left = wav->data_end - avio_tell(s->pb); 523 if (wav->ignore_length) 524 left = INT_MAX; 525 if (left <= 0) { 526 if (CONFIG_W64_DEMUXER && wav->w64) 527 left = find_guid(s->pb, ff_w64_guid_data) - 24; 528 else 529 left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a')); 530 if (left < 0) { 531 wav->audio_eof = 1; 532 if (wav->smv_data_ofs > 0 && !wav->smv_eof) 533 goto smv_retry; 534 return AVERROR_EOF; 535 } 536 wav->data_end = avio_tell(s->pb) + left; 537 } 538 539 size = MAX_SIZE; 540 if (st->codec->block_align > 1) { 541 if (size < st->codec->block_align) 542 size = st->codec->block_align; 543 size = (size / st->codec->block_align) * st->codec->block_align; 544 } 545 size = FFMIN(size, left); 546 ret = av_get_packet(s->pb, pkt, size); 547 if (ret < 0) 548 return ret; 549 pkt->stream_index = 0; 550 551 return ret; 552} 553 554static int wav_read_seek(AVFormatContext *s, 555 int stream_index, int64_t timestamp, int flags) 556{ 557 WAVDemuxContext *wav = s->priv_data; 558 AVStream *st; 559 wav->smv_eof = 0; 560 wav->audio_eof = 0; 561 if (wav->smv_data_ofs > 0) { 562 int64_t smv_timestamp = timestamp; 563 if (stream_index == 0) 564 smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base); 565 else 566 timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base); 567 if (wav->smv_frames_per_jpeg > 0) { 568 wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg; 569 wav->smv_cur_pt = smv_timestamp % wav->smv_frames_per_jpeg; 570 } 571 } 572 573 st = s->streams[0]; 574 switch (st->codec->codec_id) { 575 case AV_CODEC_ID_MP2: 576 case AV_CODEC_ID_MP3: 577 case AV_CODEC_ID_AC3: 578 case AV_CODEC_ID_DTS: 579 /* use generic seeking with dynamically generated indexes */ 580 return -1; 581 default: 582 break; 583 } 584 return ff_pcm_read_seek(s, stream_index, timestamp, flags); 585} 586 587#define OFFSET(x) offsetof(WAVDemuxContext, x) 588#define DEC AV_OPT_FLAG_DECODING_PARAM 589static const AVOption demux_options[] = { 590 { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC }, 591 { NULL }, 592}; 593 594static const AVClass wav_demuxer_class = { 595 .class_name = "WAV demuxer", 596 .item_name = av_default_item_name, 597 .option = demux_options, 598 .version = LIBAVUTIL_VERSION_INT, 599}; 600AVInputFormat ff_wav_demuxer = { 601 .name = "wav", 602 .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"), 603 .priv_data_size = sizeof(WAVDemuxContext), 604 .read_probe = wav_probe, 605 .read_header = wav_read_header, 606 .read_packet = wav_read_packet, 607 .read_seek = wav_read_seek, 608 .flags = AVFMT_GENERIC_INDEX, 609 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 }, 610 .priv_class = &wav_demuxer_class, 611}; 612#endif /* CONFIG_WAV_DEMUXER */ 613 614#if CONFIG_W64_DEMUXER 615static int w64_probe(AVProbeData *p) 616{ 617 if (p->buf_size <= 40) 618 return 0; 619 if (!memcmp(p->buf, ff_w64_guid_riff, 16) && 620 !memcmp(p->buf + 24, ff_w64_guid_wave, 16)) 621 return AVPROBE_SCORE_MAX; 622 else 623 return 0; 624} 625 626static int w64_read_header(AVFormatContext *s) 627{ 628 int64_t size, data_ofs = 0; 629 AVIOContext *pb = s->pb; 630 WAVDemuxContext *wav = s->priv_data; 631 AVStream *st; 632 uint8_t guid[16]; 633 int ret; 634 635 avio_read(pb, guid, 16); 636 if (memcmp(guid, ff_w64_guid_riff, 16)) 637 return AVERROR_INVALIDDATA; 638 639 /* riff + wave + fmt + sizes */ 640 if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) 641 return AVERROR_INVALIDDATA; 642 643 avio_read(pb, guid, 16); 644 if (memcmp(guid, ff_w64_guid_wave, 16)) { 645 av_log(s, AV_LOG_ERROR, "could not find wave guid\n"); 646 return AVERROR_INVALIDDATA; 647 } 648 649 wav->w64 = 1; 650 651 st = avformat_new_stream(s, NULL); 652 if (!st) 653 return AVERROR(ENOMEM); 654 655 while (!url_feof(pb)) { 656 if (avio_read(pb, guid, 16) != 16) 657 break; 658 size = avio_rl64(pb); 659 if (size <= 24 || INT64_MAX - size < avio_tell(pb)) 660 return AVERROR_INVALIDDATA; 661 662 if (!memcmp(guid, ff_w64_guid_fmt, 16)) { 663 /* subtract chunk header size - normal wav file doesn't count it */ 664 ret = ff_get_wav_header(pb, st->codec, size - 24); 665 if (ret < 0) 666 return ret; 667 avio_skip(pb, FFALIGN(size, INT64_C(8)) - size); 668 669 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); 670 } else if (!memcmp(guid, ff_w64_guid_fact, 16)) { 671 int64_t samples; 672 673 samples = avio_rl64(pb); 674 if (samples > 0) 675 st->duration = samples; 676 } else if (!memcmp(guid, ff_w64_guid_data, 16)) { 677 wav->data_end = avio_tell(pb) + size - 24; 678 679 data_ofs = avio_tell(pb); 680 if (!pb->seekable) 681 break; 682 683 avio_skip(pb, size - 24); 684 } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) { 685 int64_t start, end, cur; 686 uint32_t count, chunk_size, i; 687 688 start = avio_tell(pb); 689 end = start + FFALIGN(size, INT64_C(8)) - 24; 690 count = avio_rl32(pb); 691 692 for (i = 0; i < count; i++) { 693 char chunk_key[5], *value; 694 695 if (url_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */) 696 break; 697 698 chunk_key[4] = 0; 699 avio_read(pb, chunk_key, 4); 700 chunk_size = avio_rl32(pb); 701 702 value = av_mallocz(chunk_size + 1); 703 if (!value) 704 return AVERROR(ENOMEM); 705 706 ret = avio_get_str16le(pb, chunk_size, value, chunk_size); 707 avio_skip(pb, chunk_size - ret); 708 709 av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL); 710 } 711 712 avio_skip(pb, end - avio_tell(pb)); 713 } else { 714 av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid)); 715 avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24); 716 } 717 } 718 719 if (!data_ofs) 720 return AVERROR_EOF; 721 722 ff_metadata_conv_ctx(s, NULL, wav_metadata_conv); 723 ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); 724 725 handle_stream_probing(st); 726 st->need_parsing = AVSTREAM_PARSE_FULL_RAW; 727 728 avio_seek(pb, data_ofs, SEEK_SET); 729 730 return 0; 731} 732 733AVInputFormat ff_w64_demuxer = { 734 .name = "w64", 735 .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"), 736 .priv_data_size = sizeof(WAVDemuxContext), 737 .read_probe = w64_probe, 738 .read_header = w64_read_header, 739 .read_packet = wav_read_packet, 740 .read_seek = wav_read_seek, 741 .flags = AVFMT_GENERIC_INDEX, 742 .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 }, 743}; 744#endif /* CONFIG_W64_DEMUXER */ 745