FFmpeg  4.2.1
wavdec.c
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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 "id3v2.h"
38 #include "internal.h"
39 #include "metadata.h"
40 #include "pcm.h"
41 #include "riff.h"
42 #include "w64.h"
43 #include "spdif.h"
44 
45 typedef struct WAVDemuxContext {
46  const AVClass *class;
47  int64_t data_end;
48  int w64;
49  int64_t smv_data_ofs;
52  int smv_block;
54  int smv_eof;
55  int audio_eof;
57  int spdif;
60  int unaligned; // e.g. if an odd number of bytes ID3 tag was prepended
61  int rifx; // RIFX: integer byte order for parameters is big endian
63 
65 {
66  if (CONFIG_SPDIF_DEMUXER && s->streams[0]->codecpar->codec_tag == 1) {
67  enum AVCodecID codec;
68  int len = 1<<16;
69  int ret = ffio_ensure_seekback(s->pb, len);
70 
71  if (ret >= 0) {
72  uint8_t *buf = av_malloc(len);
73  if (!buf) {
74  ret = AVERROR(ENOMEM);
75  } else {
76  int64_t pos = avio_tell(s->pb);
77  len = ret = avio_read(s->pb, buf, len);
78  if (len >= 0) {
79  ret = ff_spdif_probe(buf, len, &codec);
80  if (ret > AVPROBE_SCORE_EXTENSION) {
81  s->streams[0]->codecpar->codec_id = codec;
82  wav->spdif = 1;
83  }
84  }
85  avio_seek(s->pb, pos, SEEK_SET);
86  av_free(buf);
87  }
88  }
89 
90  if (ret < 0)
91  av_log(s, AV_LOG_WARNING, "Cannot check for SPDIF\n");
92  }
93 }
94 
95 #if CONFIG_WAV_DEMUXER
96 
97 static int64_t next_tag(AVIOContext *pb, uint32_t *tag, int big_endian)
98 {
99  *tag = avio_rl32(pb);
100  if (!big_endian) {
101  return avio_rl32(pb);
102  } else {
103  return avio_rb32(pb);
104  }
105 }
106 
107 /* RIFF chunks are always at even offsets relative to where they start. */
108 static int64_t wav_seek_tag(WAVDemuxContext * wav, AVIOContext *s, int64_t offset, int whence)
109 {
110  offset += offset < INT64_MAX && offset + wav->unaligned & 1;
111 
112  return avio_seek(s, offset, whence);
113 }
114 
115 /* return the size of the found tag */
116 static int64_t find_tag(WAVDemuxContext * wav, AVIOContext *pb, uint32_t tag1)
117 {
118  unsigned int tag;
119  int64_t size;
120 
121  for (;;) {
122  if (avio_feof(pb))
123  return AVERROR_EOF;
124  size = next_tag(pb, &tag, wav->rifx);
125  if (tag == tag1)
126  break;
127  wav_seek_tag(wav, pb, size, SEEK_CUR);
128  }
129  return size;
130 }
131 
132 static int wav_probe(const AVProbeData *p)
133 {
134  /* check file header */
135  if (p->buf_size <= 32)
136  return 0;
137  if (!memcmp(p->buf + 8, "WAVE", 4)) {
138  if (!memcmp(p->buf, "RIFF", 4) || !memcmp(p->buf, "RIFX", 4))
139  /* Since the ACT demuxer has a standard WAV header at the top of
140  * its own, the returned score is decreased to avoid a probe
141  * conflict between ACT and WAV. */
142  return AVPROBE_SCORE_MAX - 1;
143  else if (!memcmp(p->buf, "RF64", 4) &&
144  !memcmp(p->buf + 12, "ds64", 4))
145  return AVPROBE_SCORE_MAX;
146  }
147  return 0;
148 }
149 
150 static void handle_stream_probing(AVStream *st)
151 {
154  st->probe_packets = FFMIN(st->probe_packets, 32);
155  }
156 }
157 
158 static int wav_parse_fmt_tag(AVFormatContext *s, int64_t size, AVStream **st)
159 {
160  AVIOContext *pb = s->pb;
161  WAVDemuxContext *wav = s->priv_data;
162  int ret;
163 
164  /* parse fmt header */
165  *st = avformat_new_stream(s, NULL);
166  if (!*st)
167  return AVERROR(ENOMEM);
168 
169  ret = ff_get_wav_header(s, pb, (*st)->codecpar, size, wav->rifx);
170  if (ret < 0)
171  return ret;
172  handle_stream_probing(*st);
173 
174  (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
175 
176  avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
177 
178  return 0;
179 }
180 
181 static int wav_parse_xma2_tag(AVFormatContext *s, int64_t size, AVStream **st)
182 {
183  AVIOContext *pb = s->pb;
184  int version, num_streams, i, channels = 0;
185 
186  if (size < 36)
187  return AVERROR_INVALIDDATA;
188 
189  *st = avformat_new_stream(s, NULL);
190  if (!*st)
191  return AVERROR(ENOMEM);
192 
193  (*st)->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
194  (*st)->codecpar->codec_id = AV_CODEC_ID_XMA2;
195  (*st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
196 
197  version = avio_r8(pb);
198  if (version != 3 && version != 4)
199  return AVERROR_INVALIDDATA;
200  num_streams = avio_r8(pb);
201  if (size != (32 + ((version==3)?0:8) + 4*num_streams))
202  return AVERROR_INVALIDDATA;
203  avio_skip(pb, 10);
204  (*st)->codecpar->sample_rate = avio_rb32(pb);
205  if (version == 4)
206  avio_skip(pb, 8);
207  avio_skip(pb, 4);
208  (*st)->duration = avio_rb32(pb);
209  avio_skip(pb, 8);
210 
211  for (i = 0; i < num_streams; i++) {
212  channels += avio_r8(pb);
213  avio_skip(pb, 3);
214  }
215  (*st)->codecpar->channels = channels;
216 
217  if ((*st)->codecpar->channels <= 0 || (*st)->codecpar->sample_rate <= 0)
218  return AVERROR_INVALIDDATA;
219 
220  avpriv_set_pts_info(*st, 64, 1, (*st)->codecpar->sample_rate);
221 
222  avio_seek(pb, -size, SEEK_CUR);
223  av_freep(&(*st)->codecpar->extradata);
224  if (ff_get_extradata(s, (*st)->codecpar, pb, size) < 0)
225  return AVERROR(ENOMEM);
226 
227  return 0;
228 }
229 
230 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
231  int length)
232 {
233  char temp[257];
234  int ret;
235 
236  av_assert0(length < sizeof(temp));
237  if ((ret = avio_read(s->pb, temp, length)) != length)
238  return ret < 0 ? ret : AVERROR_INVALIDDATA;
239 
240  temp[length] = 0;
241 
242  if (strlen(temp))
243  return av_dict_set(&s->metadata, key, temp, 0);
244 
245  return 0;
246 }
247 
248 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
249 {
250  char temp[131], *coding_history;
251  int ret, x;
252  uint64_t time_reference;
253  int64_t umid_parts[8], umid_mask = 0;
254 
255  if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
256  (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
257  (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
258  (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
259  (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
260  return ret;
261 
262  time_reference = avio_rl64(s->pb);
263  snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
264  if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
265  return ret;
266 
267  /* check if version is >= 1, in which case an UMID may be present */
268  if (avio_rl16(s->pb) >= 1) {
269  for (x = 0; x < 8; x++)
270  umid_mask |= umid_parts[x] = avio_rb64(s->pb);
271 
272  if (umid_mask) {
273  /* the string formatting below is per SMPTE 330M-2004 Annex C */
274  if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
275  umid_parts[6] == 0 && umid_parts[7] == 0) {
276  /* basic UMID */
277  snprintf(temp, sizeof(temp),
278  "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
279  umid_parts[0], umid_parts[1],
280  umid_parts[2], umid_parts[3]);
281  } else {
282  /* extended UMID */
283  snprintf(temp, sizeof(temp),
284  "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
285  "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
286  umid_parts[0], umid_parts[1],
287  umid_parts[2], umid_parts[3],
288  umid_parts[4], umid_parts[5],
289  umid_parts[6], umid_parts[7]);
290  }
291 
292  if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
293  return ret;
294  }
295 
296  avio_skip(s->pb, 190);
297  } else
298  avio_skip(s->pb, 254);
299 
300  if (size > 602) {
301  /* CodingHistory present */
302  size -= 602;
303 
304  if (!(coding_history = av_malloc(size + 1)))
305  return AVERROR(ENOMEM);
306 
307  if ((ret = avio_read(s->pb, coding_history, size)) != size) {
308  av_free(coding_history);
309  return ret < 0 ? ret : AVERROR_INVALIDDATA;
310  }
311 
312  coding_history[size] = 0;
313  if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
315  return ret;
316  }
317 
318  return 0;
319 }
320 
321 static const AVMetadataConv wav_metadata_conv[] = {
322  { "description", "comment" },
323  { "originator", "encoded_by" },
324  { "origination_date", "date" },
325  { "origination_time", "creation_time" },
326  { 0 },
327 };
328 
329 /* wav input */
330 static int wav_read_header(AVFormatContext *s)
331 {
332  int64_t size, av_uninit(data_size);
333  int64_t sample_count = 0;
334  int rf64 = 0;
335  uint32_t tag;
336  AVIOContext *pb = s->pb;
337  AVStream *st = NULL;
338  WAVDemuxContext *wav = s->priv_data;
339  int ret, got_fmt = 0, got_xma2 = 0;
340  int64_t next_tag_ofs, data_ofs = -1;
341 
342  wav->unaligned = avio_tell(s->pb) & 1;
343 
344  wav->smv_data_ofs = -1;
345 
346  /* read chunk ID */
347  tag = avio_rl32(pb);
348  switch (tag) {
349  case MKTAG('R', 'I', 'F', 'F'):
350  break;
351  case MKTAG('R', 'I', 'F', 'X'):
352  wav->rifx = 1;
353  break;
354  case MKTAG('R', 'F', '6', '4'):
355  rf64 = 1;
356  break;
357  default:
358  av_log(s, AV_LOG_ERROR, "invalid start code %s in RIFF header\n",
359  av_fourcc2str(tag));
360  return AVERROR_INVALIDDATA;
361  }
362 
363  /* read chunk size */
364  avio_rl32(pb);
365 
366  /* read format */
367  if (avio_rl32(pb) != MKTAG('W', 'A', 'V', 'E')) {
368  av_log(s, AV_LOG_ERROR, "invalid format in RIFF header\n");
369  return AVERROR_INVALIDDATA;
370  }
371 
372  if (rf64) {
373  if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
374  return AVERROR_INVALIDDATA;
375  size = avio_rl32(pb);
376  if (size < 24)
377  return AVERROR_INVALIDDATA;
378  avio_rl64(pb); /* RIFF size */
379 
380  data_size = avio_rl64(pb);
381  sample_count = avio_rl64(pb);
382 
383  if (data_size < 0 || sample_count < 0) {
384  av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
385  "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
386  data_size, sample_count);
387  return AVERROR_INVALIDDATA;
388  }
389  avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
390 
391  }
392 
393  for (;;) {
394  AVStream *vst;
395  size = next_tag(pb, &tag, wav->rifx);
396  next_tag_ofs = avio_tell(pb) + size;
397 
398  if (avio_feof(pb))
399  break;
400 
401  switch (tag) {
402  case MKTAG('f', 'm', 't', ' '):
403  /* only parse the first 'fmt ' tag found */
404  if (!got_xma2 && !got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
405  return ret;
406  } else if (got_fmt)
407  av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
408 
409  got_fmt = 1;
410  break;
411  case MKTAG('X', 'M', 'A', '2'):
412  /* only parse the first 'XMA2' tag found */
413  if (!got_fmt && !got_xma2 && (ret = wav_parse_xma2_tag(s, size, &st)) < 0) {
414  return ret;
415  } else if (got_xma2)
416  av_log(s, AV_LOG_WARNING, "found more than one 'XMA2' tag\n");
417 
418  got_xma2 = 1;
419  break;
420  case MKTAG('d', 'a', 't', 'a'):
421  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) && !got_fmt && !got_xma2) {
422  av_log(s, AV_LOG_ERROR,
423  "found no 'fmt ' tag before the 'data' tag\n");
424  return AVERROR_INVALIDDATA;
425  }
426 
427  if (rf64) {
428  next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
429  } else if (size != 0xFFFFFFFF) {
430  data_size = size;
431  next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
432  } else {
433  av_log(s, AV_LOG_WARNING, "Ignoring maximum wav data size, "
434  "file may be invalid\n");
435  data_size = 0;
436  next_tag_ofs = wav->data_end = INT64_MAX;
437  }
438 
439  data_ofs = avio_tell(pb);
440 
441  /* don't look for footer metadata if we can't seek or if we don't
442  * know where the data tag ends
443  */
444  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || (!rf64 && !size))
445  goto break_loop;
446  break;
447  case MKTAG('f', 'a', 'c', 't'):
448  if (!sample_count)
449  sample_count = (!wav->rifx ? avio_rl32(pb) : avio_rb32(pb));
450  break;
451  case MKTAG('b', 'e', 'x', 't'):
452  if ((ret = wav_parse_bext_tag(s, size)) < 0)
453  return ret;
454  break;
455  case MKTAG('S','M','V','0'):
456  if (!got_fmt) {
457  av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
458  return AVERROR_INVALIDDATA;
459  }
460  // SMV file, a wav file with video appended.
461  if (size != MKTAG('0','2','0','0')) {
462  av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
463  goto break_loop;
464  }
465  av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
466  wav->smv_given_first = 0;
467  vst = avformat_new_stream(s, NULL);
468  if (!vst)
469  return AVERROR(ENOMEM);
470  avio_r8(pb);
471  vst->id = 1;
474  vst->codecpar->width = avio_rl24(pb);
475  vst->codecpar->height = avio_rl24(pb);
476  if (ff_alloc_extradata(vst->codecpar, 4)) {
477  av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
478  return AVERROR(ENOMEM);
479  }
480  size = avio_rl24(pb);
481  wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
482  avio_rl24(pb);
483  wav->smv_block_size = avio_rl24(pb);
484  avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
485  vst->duration = avio_rl24(pb);
486  avio_rl24(pb);
487  avio_rl24(pb);
488  wav->smv_frames_per_jpeg = avio_rl24(pb);
489  if (wav->smv_frames_per_jpeg > 65536) {
490  av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n");
491  return AVERROR_INVALIDDATA;
492  }
494  wav->smv_cur_pt = 0;
495  goto break_loop;
496  case MKTAG('L', 'I', 'S', 'T'):
497  if (size < 4) {
498  av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
499  return AVERROR_INVALIDDATA;
500  }
501  switch (avio_rl32(pb)) {
502  case MKTAG('I', 'N', 'F', 'O'):
503  ff_read_riff_info(s, size - 4);
504  }
505  break;
506  case MKTAG('I', 'D', '3', ' '):
507  case MKTAG('i', 'd', '3', ' '): {
508  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
509  ff_id3v2_read_dict(pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
510  if (id3v2_extra_meta) {
511  ff_id3v2_parse_apic(s, &id3v2_extra_meta);
512  ff_id3v2_parse_chapters(s, &id3v2_extra_meta);
513  ff_id3v2_parse_priv(s, &id3v2_extra_meta);
514  }
515  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
516  }
517  break;
518  }
519 
520  /* seek to next tag unless we know that we'll run into EOF */
521  if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
522  wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) {
523  break;
524  }
525  }
526 
527 break_loop:
528  if (!got_fmt && !got_xma2) {
529  av_log(s, AV_LOG_ERROR, "no 'fmt ' or 'XMA2' tag found\n");
530  return AVERROR_INVALIDDATA;
531  }
532 
533  if (data_ofs < 0) {
534  av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
535  return AVERROR_INVALIDDATA;
536  }
537 
538  avio_seek(pb, data_ofs, SEEK_SET);
539 
540  if (data_size > (INT64_MAX>>3)) {
541  av_log(s, AV_LOG_WARNING, "Data size %"PRId64" is too large\n", data_size);
542  data_size = 0;
543  }
544 
545  if ( st->codecpar->bit_rate > 0 && data_size > 0
546  && st->codecpar->sample_rate > 0
547  && sample_count > 0 && st->codecpar->channels > 1
548  && sample_count % st->codecpar->channels == 0) {
549  if (fabs(8.0 * data_size * st->codecpar->channels * st->codecpar->sample_rate /
550  sample_count /st->codecpar->bit_rate - 1.0) < 0.3)
551  sample_count /= st->codecpar->channels;
552  }
553 
554  if ( data_size > 0 && sample_count && st->codecpar->channels
555  && (data_size << 3) / sample_count / st->codecpar->channels > st->codecpar->bits_per_coded_sample + 1) {
556  av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
557  sample_count = 0;
558  }
559 
560  /* G.729 hack (for Ticket4577)
561  * FIXME: Come up with cleaner, more general solution */
562  if (st->codecpar->codec_id == AV_CODEC_ID_G729 && sample_count && (data_size << 3) > sample_count) {
563  av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
564  sample_count = 0;
565  }
566 
567  if (!sample_count || av_get_exact_bits_per_sample(st->codecpar->codec_id) > 0)
568  if ( st->codecpar->channels
569  && data_size
571  && wav->data_end <= avio_size(pb))
572  sample_count = (data_size << 3)
573  /
574  (st->codecpar->channels * (uint64_t)av_get_bits_per_sample(st->codecpar->codec_id));
575 
576  if (sample_count)
577  st->duration = sample_count;
578 
580  st->codecpar->block_align == st->codecpar->channels * 4 &&
581  st->codecpar->bits_per_coded_sample == 32 &&
582  st->codecpar->extradata_size == 2 &&
583  AV_RL16(st->codecpar->extradata) == 1) {
586  } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE &&
587  st->codecpar->block_align == st->codecpar->channels * 4 &&
588  st->codecpar->bits_per_coded_sample == 24) {
590  } else if (st->codecpar->codec_id == AV_CODEC_ID_XMA1 ||
592  st->codecpar->block_align = 2048;
593  }
594 
595  ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
597 
598  set_spdif(s, wav);
599 
600  return 0;
601 }
602 
603 /**
604  * Find chunk with w64 GUID by skipping over other chunks.
605  * @return the size of the found chunk
606  */
607 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
608 {
609  uint8_t guid[16];
610  int64_t size;
611 
612  while (!avio_feof(pb)) {
613  avio_read(pb, guid, 16);
614  size = avio_rl64(pb);
615  if (size <= 24)
616  return AVERROR_INVALIDDATA;
617  if (!memcmp(guid, guid1, 16))
618  return size;
619  avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
620  }
621  return AVERROR_EOF;
622 }
623 
624 #define MAX_SIZE 4096
625 
626 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
627 {
628  int ret, size;
629  int64_t left;
630  AVStream *st;
631  WAVDemuxContext *wav = s->priv_data;
632 
633  if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
634  return ff_spdif_read_packet(s, pkt);
635 
636  if (wav->smv_data_ofs > 0) {
637  int64_t audio_dts, video_dts;
638 smv_retry:
639  audio_dts = (int32_t)s->streams[0]->cur_dts;
640  video_dts = (int32_t)s->streams[1]->cur_dts;
641 
642  if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
643  /*We always return a video frame first to get the pixel format first*/
644  wav->smv_last_stream = wav->smv_given_first ?
645  av_compare_ts(video_dts, s->streams[1]->time_base,
646  audio_dts, s->streams[0]->time_base) > 0 : 0;
647  wav->smv_given_first = 1;
648  }
649  wav->smv_last_stream = !wav->smv_last_stream;
650  wav->smv_last_stream |= wav->audio_eof;
651  wav->smv_last_stream &= !wav->smv_eof;
652  if (wav->smv_last_stream) {
653  uint64_t old_pos = avio_tell(s->pb);
654  uint64_t new_pos = wav->smv_data_ofs +
655  wav->smv_block * wav->smv_block_size;
656  if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
657  ret = AVERROR_EOF;
658  goto smv_out;
659  }
660  size = avio_rl24(s->pb);
661  ret = av_get_packet(s->pb, pkt, size);
662  if (ret < 0)
663  goto smv_out;
664  pkt->pos -= 3;
665  pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt;
666  wav->smv_cur_pt++;
667  if (wav->smv_frames_per_jpeg > 0)
668  wav->smv_cur_pt %= wav->smv_frames_per_jpeg;
669  if (!wav->smv_cur_pt)
670  wav->smv_block++;
671 
672  pkt->stream_index = 1;
673 smv_out:
674  avio_seek(s->pb, old_pos, SEEK_SET);
675  if (ret == AVERROR_EOF) {
676  wav->smv_eof = 1;
677  goto smv_retry;
678  }
679  return ret;
680  }
681  }
682 
683  st = s->streams[0];
684 
685  left = wav->data_end - avio_tell(s->pb);
686  if (wav->ignore_length)
687  left = INT_MAX;
688  if (left <= 0) {
689  if (CONFIG_W64_DEMUXER && wav->w64)
690  left = find_guid(s->pb, ff_w64_guid_data) - 24;
691  else
692  left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a'));
693  if (left < 0) {
694  wav->audio_eof = 1;
695  if (wav->smv_data_ofs > 0 && !wav->smv_eof)
696  goto smv_retry;
697  return AVERROR_EOF;
698  }
699  wav->data_end = avio_tell(s->pb) + left;
700  }
701 
702  size = MAX_SIZE;
703  if (st->codecpar->block_align > 1) {
704  if (size < st->codecpar->block_align)
705  size = st->codecpar->block_align;
706  size = (size / st->codecpar->block_align) * st->codecpar->block_align;
707  }
708  size = FFMIN(size, left);
709  ret = av_get_packet(s->pb, pkt, size);
710  if (ret < 0)
711  return ret;
712  pkt->stream_index = 0;
713 
714  return ret;
715 }
716 
717 static int wav_read_seek(AVFormatContext *s,
718  int stream_index, int64_t timestamp, int flags)
719 {
720  WAVDemuxContext *wav = s->priv_data;
721  AVStream *st;
722  wav->smv_eof = 0;
723  wav->audio_eof = 0;
724  if (wav->smv_data_ofs > 0) {
725  int64_t smv_timestamp = timestamp;
726  if (stream_index == 0)
727  smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
728  else
729  timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
730  if (wav->smv_frames_per_jpeg > 0) {
731  wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
732  wav->smv_cur_pt = smv_timestamp % wav->smv_frames_per_jpeg;
733  }
734  }
735 
736  st = s->streams[0];
737  switch (st->codecpar->codec_id) {
738  case AV_CODEC_ID_MP2:
739  case AV_CODEC_ID_MP3:
740  case AV_CODEC_ID_AC3:
741  case AV_CODEC_ID_DTS:
742  case AV_CODEC_ID_XMA2:
743  /* use generic seeking with dynamically generated indexes */
744  return -1;
745  default:
746  break;
747  }
748  return ff_pcm_read_seek(s, stream_index, timestamp, flags);
749 }
750 
751 #define OFFSET(x) offsetof(WAVDemuxContext, x)
752 #define DEC AV_OPT_FLAG_DECODING_PARAM
753 static const AVOption demux_options[] = {
754  { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
755  { NULL },
756 };
757 
758 static const AVClass wav_demuxer_class = {
759  .class_name = "WAV demuxer",
760  .item_name = av_default_item_name,
761  .option = demux_options,
762  .version = LIBAVUTIL_VERSION_INT,
763 };
765  .name = "wav",
766  .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
767  .priv_data_size = sizeof(WAVDemuxContext),
768  .read_probe = wav_probe,
769  .read_header = wav_read_header,
770  .read_packet = wav_read_packet,
771  .read_seek = wav_read_seek,
773  .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
774  .priv_class = &wav_demuxer_class,
775 };
776 #endif /* CONFIG_WAV_DEMUXER */
777 
778 #if CONFIG_W64_DEMUXER
779 static int w64_probe(const AVProbeData *p)
780 {
781  if (p->buf_size <= 40)
782  return 0;
783  if (!memcmp(p->buf, ff_w64_guid_riff, 16) &&
784  !memcmp(p->buf + 24, ff_w64_guid_wave, 16))
785  return AVPROBE_SCORE_MAX;
786  else
787  return 0;
788 }
789 
790 static int w64_read_header(AVFormatContext *s)
791 {
792  int64_t size, data_ofs = 0;
793  AVIOContext *pb = s->pb;
794  WAVDemuxContext *wav = s->priv_data;
795  AVStream *st;
796  uint8_t guid[16];
797  int ret;
798 
799  avio_read(pb, guid, 16);
800  if (memcmp(guid, ff_w64_guid_riff, 16))
801  return AVERROR_INVALIDDATA;
802 
803  /* riff + wave + fmt + sizes */
804  if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
805  return AVERROR_INVALIDDATA;
806 
807  avio_read(pb, guid, 16);
808  if (memcmp(guid, ff_w64_guid_wave, 16)) {
809  av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
810  return AVERROR_INVALIDDATA;
811  }
812 
813  wav->w64 = 1;
814 
815  st = avformat_new_stream(s, NULL);
816  if (!st)
817  return AVERROR(ENOMEM);
818 
819  while (!avio_feof(pb)) {
820  if (avio_read(pb, guid, 16) != 16)
821  break;
822  size = avio_rl64(pb);
823  if (size <= 24 || INT64_MAX - size < avio_tell(pb))
824  return AVERROR_INVALIDDATA;
825 
826  if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
827  /* subtract chunk header size - normal wav file doesn't count it */
828  ret = ff_get_wav_header(s, pb, st->codecpar, size - 24, 0);
829  if (ret < 0)
830  return ret;
831  avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
832 
833  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
834  } else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
835  int64_t samples;
836 
837  samples = avio_rl64(pb);
838  if (samples > 0)
839  st->duration = samples;
840  avio_skip(pb, FFALIGN(size, INT64_C(8)) - 32);
841  } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
842  wav->data_end = avio_tell(pb) + size - 24;
843 
844  data_ofs = avio_tell(pb);
845  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
846  break;
847 
848  avio_skip(pb, size - 24);
849  } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
850  int64_t start, end, cur;
851  uint32_t count, chunk_size, i;
852 
853  start = avio_tell(pb);
854  end = start + FFALIGN(size, INT64_C(8)) - 24;
855  count = avio_rl32(pb);
856 
857  for (i = 0; i < count; i++) {
858  char chunk_key[5], *value;
859 
860  if (avio_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
861  break;
862 
863  chunk_key[4] = 0;
864  avio_read(pb, chunk_key, 4);
865  chunk_size = avio_rl32(pb);
866  if (chunk_size == UINT32_MAX)
867  return AVERROR_INVALIDDATA;
868 
869  value = av_mallocz(chunk_size + 1);
870  if (!value)
871  return AVERROR(ENOMEM);
872 
873  ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
874  avio_skip(pb, chunk_size - ret);
875 
876  av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
877  }
878 
879  avio_skip(pb, end - avio_tell(pb));
880  } else {
881  av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
882  avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
883  }
884  }
885 
886  if (!data_ofs)
887  return AVERROR_EOF;
888 
889  ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
891 
892  handle_stream_probing(st);
894 
895  avio_seek(pb, data_ofs, SEEK_SET);
896 
897  set_spdif(s, wav);
898 
899  return 0;
900 }
901 
903  .name = "w64",
904  .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
905  .priv_data_size = sizeof(WAVDemuxContext),
906  .read_probe = w64_probe,
907  .read_header = w64_read_header,
908  .read_packet = wav_read_packet,
909  .read_seek = wav_read_seek,
911  .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
912 };
913 #endif /* CONFIG_W64_DEMUXER */
int ff_read_riff_info(AVFormatContext *s, int64_t size)
Definition: riffdec.c:230
#define NULL
Definition: coverity.c:32
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:141
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t video_dts
Definition: movenc.c:60
void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:336
const uint8_t ff_w64_guid_wave[16]
Definition: w64.c:28
Buffered I/O operations.
int size
int ff_spdif_probe(const uint8_t *p_buf, int buf_size, enum AVCodecID *codec)
Definition: spdifdec.c:116
AVOption.
Definition: opt.h:246
const uint8_t ff_w64_guid_fact[16]
Definition: w64.c:38
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
else temp
Definition: vf_mcdeint.c:256
#define FF_ARG_GUID(g)
Definition: riff.h:105
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4886
int probe_packets
Number of packets to buffer for codec probing.
Definition: avformat.h:1091
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
channels
Definition: aptx.c:30
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1811
int smv_frames_per_jpeg
Definition: wavdec.c:51
#define AV_RL16
Definition: intreadwrite.h:42
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
Definition: wavdec.c:64
const char * key
int version
Definition: avisynth_c.h:858
static AVPacket pkt
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1143
#define MAX_SIZE
Definition: vf_unsharp.c:303
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a UTF-16 string from pb and convert it to UTF-8.
int ignore_length
Definition: wavdec.c:56
Format I/O context.
Definition: avformat.h:1358
static const GUIDParseTable * find_guid(ff_asf_guid guid)
Definition: asfdec_o.c:1658
int64_t audio_dts
Definition: movenc.c:60
int64_t cur_dts
Definition: avformat.h:1084
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
internal metadata API header see avformat.h or the public API!
Public dictionary API.
uint8_t
#define av_malloc(s)
int width
Video only.
Definition: avcodec.h:4023
AVOptions.
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1183
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:800
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
enum AVStreamParseType need_parsing
Definition: avformat.h:1099
int id
Format-specific stream ID.
Definition: avformat.h:888
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4459
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
uint32_t tag
Definition: movenc.c:1496
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:310
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:921
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define FFALIGN(x, a)
Definition: macros.h:48
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:804
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size, int big_endian)
Definition: riffdec.c:91
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
int ff_spdif_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: spdifdec.c:173
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1514
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:769
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1276
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:565
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1127
simple assert() macros that are a bit more flexible than ISO C assert().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
int smv_block_size
Definition: wavdec.c:50
int smv_cur_pt
Definition: wavdec.c:58
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:499
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3975
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:638
AVInputFormat ff_wav_demuxer
#define CONFIG_W64_DEMUXER
Definition: config.h:2259
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:449
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
int block_align
Audio only.
Definition: avcodec.h:4074
#define DEC
Definition: librsvgdec.c:105
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:3288
#define FFMIN(a, b)
Definition: common.h:96
int smv_last_stream
Definition: wavdec.c:53
int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1431
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
const uint8_t ff_w64_guid_data[16]
Definition: w64.c:42
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
int32_t
const uint8_t ff_w64_guid_riff[16]
Definition: w64.c:23
#define s(width, name)
Definition: cbs_vp9.c:257
int audio_eof
Definition: wavdec.c:55
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:52
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
Stream structure.
Definition: avformat.h:881
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
void * buf
Definition: avisynth_c.h:766
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
double value
Definition: eval.c:98
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:468
int64_t smv_data_ofs
Definition: wavdec.c:49
#define snprintf
Definition: snprintf.h:34
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:456
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
const AVMetadataConv ff_riff_info_conv[]
Definition: riff.c:583
#define flags(name, subs,...)
Definition: cbs_av1.c:561
const uint8_t ff_w64_guid_fmt[16]
Definition: w64.c:33
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
#define OFFSET(x)
Definition: ffmpeg_opt.c:3363
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:1051
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int sample_rate
Audio only.
Definition: avcodec.h:4067
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
int smv_given_first
Definition: wavdec.c:59
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:753
Main libavformat public API header.
#define FF_PRI_GUID
Definition: riff.h:101
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3306
int64_t data_end
Definition: wavdec.c:47
#define av_free(p)
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1115
int smv_block
Definition: wavdec.c:52
int len
void * priv_data
Format private data.
Definition: avformat.h:1386
const uint8_t ff_w64_guid_summarylist[16]
Definition: w64.c:47
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3999
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
int channels
Audio only.
Definition: avcodec.h:4063
#define av_uninit(x)
Definition: attributes.h:148
AVInputFormat ff_w64_demuxer
#define av_freep(p)
#define CONFIG_SPDIF_DEMUXER
Definition: config.h:2226
void INT64 INT64 count
Definition: avisynth_c.h:766
void INT64 start
Definition: avisynth_c.h:766
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:358
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
const char int length
Definition: avisynth_c.h:860
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:761
int stream_index
Definition: avcodec.h:1479
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
#define MKTAG(a, b, c, d)
Definition: common.h:366
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1139
This structure stores compressed data.
Definition: avcodec.h:1454
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:777
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int unaligned
Definition: wavdec.c:60
#define AV_WL32(p, v)
Definition: intreadwrite.h:426