FFmpeg  4.3
wavdec.c
Go to the documentation of this file.
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, ret;
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  if ((ret = ff_get_extradata(s, (*st)->codecpar, pb, size)) < 0)
224  return ret;
225 
226  return 0;
227 }
228 
229 static inline int wav_parse_bext_string(AVFormatContext *s, const char *key,
230  int length)
231 {
232  char temp[257];
233  int ret;
234 
235  av_assert0(length < sizeof(temp));
236  if ((ret = avio_read(s->pb, temp, length)) != length)
237  return ret < 0 ? ret : AVERROR_INVALIDDATA;
238 
239  temp[length] = 0;
240 
241  if (strlen(temp))
242  return av_dict_set(&s->metadata, key, temp, 0);
243 
244  return 0;
245 }
246 
247 static int wav_parse_bext_tag(AVFormatContext *s, int64_t size)
248 {
249  char temp[131], *coding_history;
250  int ret, x;
251  uint64_t time_reference;
252  int64_t umid_parts[8], umid_mask = 0;
253 
254  if ((ret = wav_parse_bext_string(s, "description", 256)) < 0 ||
255  (ret = wav_parse_bext_string(s, "originator", 32)) < 0 ||
256  (ret = wav_parse_bext_string(s, "originator_reference", 32)) < 0 ||
257  (ret = wav_parse_bext_string(s, "origination_date", 10)) < 0 ||
258  (ret = wav_parse_bext_string(s, "origination_time", 8)) < 0)
259  return ret;
260 
261  time_reference = avio_rl64(s->pb);
262  snprintf(temp, sizeof(temp), "%"PRIu64, time_reference);
263  if ((ret = av_dict_set(&s->metadata, "time_reference", temp, 0)) < 0)
264  return ret;
265 
266  /* check if version is >= 1, in which case an UMID may be present */
267  if (avio_rl16(s->pb) >= 1) {
268  for (x = 0; x < 8; x++)
269  umid_mask |= umid_parts[x] = avio_rb64(s->pb);
270 
271  if (umid_mask) {
272  /* the string formatting below is per SMPTE 330M-2004 Annex C */
273  if (umid_parts[4] == 0 && umid_parts[5] == 0 &&
274  umid_parts[6] == 0 && umid_parts[7] == 0) {
275  /* basic UMID */
276  snprintf(temp, sizeof(temp),
277  "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
278  umid_parts[0], umid_parts[1],
279  umid_parts[2], umid_parts[3]);
280  } else {
281  /* extended UMID */
282  snprintf(temp, sizeof(temp),
283  "0x%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64
284  "%016"PRIX64"%016"PRIX64"%016"PRIX64"%016"PRIX64,
285  umid_parts[0], umid_parts[1],
286  umid_parts[2], umid_parts[3],
287  umid_parts[4], umid_parts[5],
288  umid_parts[6], umid_parts[7]);
289  }
290 
291  if ((ret = av_dict_set(&s->metadata, "umid", temp, 0)) < 0)
292  return ret;
293  }
294 
295  avio_skip(s->pb, 190);
296  } else
297  avio_skip(s->pb, 254);
298 
299  if (size > 602) {
300  /* CodingHistory present */
301  size -= 602;
302 
303  if (!(coding_history = av_malloc(size + 1)))
304  return AVERROR(ENOMEM);
305 
306  if ((ret = avio_read(s->pb, coding_history, size)) != size) {
307  av_free(coding_history);
308  return ret < 0 ? ret : AVERROR_INVALIDDATA;
309  }
310 
311  coding_history[size] = 0;
312  if ((ret = av_dict_set(&s->metadata, "coding_history", coding_history,
314  return ret;
315  }
316 
317  return 0;
318 }
319 
320 static const AVMetadataConv wav_metadata_conv[] = {
321  { "description", "comment" },
322  { "originator", "encoded_by" },
323  { "origination_date", "date" },
324  { "origination_time", "creation_time" },
325  { 0 },
326 };
327 
328 /* wav input */
329 static int wav_read_header(AVFormatContext *s)
330 {
331  int64_t size, av_uninit(data_size);
332  int64_t sample_count = 0;
333  int rf64 = 0;
334  uint32_t tag;
335  AVIOContext *pb = s->pb;
336  AVStream *st = NULL;
337  WAVDemuxContext *wav = s->priv_data;
338  int ret, got_fmt = 0, got_xma2 = 0;
339  int64_t next_tag_ofs, data_ofs = -1;
340 
341  wav->unaligned = avio_tell(s->pb) & 1;
342 
343  wav->smv_data_ofs = -1;
344 
345  /* read chunk ID */
346  tag = avio_rl32(pb);
347  switch (tag) {
348  case MKTAG('R', 'I', 'F', 'F'):
349  break;
350  case MKTAG('R', 'I', 'F', 'X'):
351  wav->rifx = 1;
352  break;
353  case MKTAG('R', 'F', '6', '4'):
354  rf64 = 1;
355  break;
356  default:
357  av_log(s, AV_LOG_ERROR, "invalid start code %s in RIFF header\n",
358  av_fourcc2str(tag));
359  return AVERROR_INVALIDDATA;
360  }
361 
362  /* read chunk size */
363  avio_rl32(pb);
364 
365  /* read format */
366  if (avio_rl32(pb) != MKTAG('W', 'A', 'V', 'E')) {
367  av_log(s, AV_LOG_ERROR, "invalid format in RIFF header\n");
368  return AVERROR_INVALIDDATA;
369  }
370 
371  if (rf64) {
372  if (avio_rl32(pb) != MKTAG('d', 's', '6', '4'))
373  return AVERROR_INVALIDDATA;
374  size = avio_rl32(pb);
375  if (size < 24)
376  return AVERROR_INVALIDDATA;
377  avio_rl64(pb); /* RIFF size */
378 
379  data_size = avio_rl64(pb);
380  sample_count = avio_rl64(pb);
381 
382  if (data_size < 0 || sample_count < 0) {
383  av_log(s, AV_LOG_ERROR, "negative data_size and/or sample_count in "
384  "ds64: data_size = %"PRId64", sample_count = %"PRId64"\n",
385  data_size, sample_count);
386  return AVERROR_INVALIDDATA;
387  }
388  avio_skip(pb, size - 24); /* skip rest of ds64 chunk */
389 
390  }
391 
392  for (;;) {
393  AVStream *vst;
394  size = next_tag(pb, &tag, wav->rifx);
395  next_tag_ofs = avio_tell(pb) + size;
396 
397  if (avio_feof(pb))
398  break;
399 
400  switch (tag) {
401  case MKTAG('f', 'm', 't', ' '):
402  /* only parse the first 'fmt ' tag found */
403  if (!got_xma2 && !got_fmt && (ret = wav_parse_fmt_tag(s, size, &st)) < 0) {
404  return ret;
405  } else if (got_fmt)
406  av_log(s, AV_LOG_WARNING, "found more than one 'fmt ' tag\n");
407 
408  got_fmt = 1;
409  break;
410  case MKTAG('X', 'M', 'A', '2'):
411  /* only parse the first 'XMA2' tag found */
412  if (!got_fmt && !got_xma2 && (ret = wav_parse_xma2_tag(s, size, &st)) < 0) {
413  return ret;
414  } else if (got_xma2)
415  av_log(s, AV_LOG_WARNING, "found more than one 'XMA2' tag\n");
416 
417  got_xma2 = 1;
418  break;
419  case MKTAG('d', 'a', 't', 'a'):
420  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) && !got_fmt && !got_xma2) {
421  av_log(s, AV_LOG_ERROR,
422  "found no 'fmt ' tag before the 'data' tag\n");
423  return AVERROR_INVALIDDATA;
424  }
425 
426  if (rf64) {
427  next_tag_ofs = wav->data_end = avio_tell(pb) + data_size;
428  } else if (size != 0xFFFFFFFF) {
429  data_size = size;
430  next_tag_ofs = wav->data_end = size ? next_tag_ofs : INT64_MAX;
431  } else {
432  av_log(s, AV_LOG_WARNING, "Ignoring maximum wav data size, "
433  "file may be invalid\n");
434  data_size = 0;
435  next_tag_ofs = wav->data_end = INT64_MAX;
436  }
437 
438  data_ofs = avio_tell(pb);
439 
440  /* don't look for footer metadata if we can't seek or if we don't
441  * know where the data tag ends
442  */
443  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || (!rf64 && !size))
444  goto break_loop;
445  break;
446  case MKTAG('f', 'a', 'c', 't'):
447  if (!sample_count)
448  sample_count = (!wav->rifx ? avio_rl32(pb) : avio_rb32(pb));
449  break;
450  case MKTAG('b', 'e', 'x', 't'):
451  if ((ret = wav_parse_bext_tag(s, size)) < 0)
452  return ret;
453  break;
454  case MKTAG('S','M','V','0'):
455  if (!got_fmt) {
456  av_log(s, AV_LOG_ERROR, "found no 'fmt ' tag before the 'SMV0' tag\n");
457  return AVERROR_INVALIDDATA;
458  }
459  // SMV file, a wav file with video appended.
460  if (size != MKTAG('0','2','0','0')) {
461  av_log(s, AV_LOG_ERROR, "Unknown SMV version found\n");
462  goto break_loop;
463  }
464  av_log(s, AV_LOG_DEBUG, "Found SMV data\n");
465  wav->smv_given_first = 0;
466  vst = avformat_new_stream(s, NULL);
467  if (!vst)
468  return AVERROR(ENOMEM);
469  avio_r8(pb);
470  vst->id = 1;
473  vst->codecpar->width = avio_rl24(pb);
474  vst->codecpar->height = avio_rl24(pb);
475  if ((ret = ff_alloc_extradata(vst->codecpar, 4)) < 0) {
476  av_log(s, AV_LOG_ERROR, "Could not allocate extradata.\n");
477  return ret;
478  }
479  size = avio_rl24(pb);
480  wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3;
481  avio_rl24(pb);
482  wav->smv_block_size = avio_rl24(pb);
483  avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb));
484  vst->duration = avio_rl24(pb);
485  avio_rl24(pb);
486  avio_rl24(pb);
487  wav->smv_frames_per_jpeg = avio_rl24(pb);
488  if (wav->smv_frames_per_jpeg > 65536) {
489  av_log(s, AV_LOG_ERROR, "too many frames per jpeg\n");
490  return AVERROR_INVALIDDATA;
491  }
493  wav->smv_cur_pt = 0;
494  goto break_loop;
495  case MKTAG('L', 'I', 'S', 'T'):
496  if (size < 4) {
497  av_log(s, AV_LOG_ERROR, "too short LIST tag\n");
498  return AVERROR_INVALIDDATA;
499  }
500  switch (avio_rl32(pb)) {
501  case MKTAG('I', 'N', 'F', 'O'):
502  ff_read_riff_info(s, size - 4);
503  }
504  break;
505  case MKTAG('I', 'D', '3', ' '):
506  case MKTAG('i', 'd', '3', ' '): {
507  ID3v2ExtraMeta *id3v2_extra_meta = NULL;
508  ff_id3v2_read_dict(pb, &s->internal->id3v2_meta, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
509  if (id3v2_extra_meta) {
510  ff_id3v2_parse_apic(s, id3v2_extra_meta);
511  ff_id3v2_parse_chapters(s, id3v2_extra_meta);
512  ff_id3v2_parse_priv(s, id3v2_extra_meta);
513  }
514  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
515  }
516  break;
517  }
518 
519  /* seek to next tag unless we know that we'll run into EOF */
520  if ((avio_size(pb) > 0 && next_tag_ofs >= avio_size(pb)) ||
521  wav_seek_tag(wav, pb, next_tag_ofs, SEEK_SET) < 0) {
522  break;
523  }
524  }
525 
526 break_loop:
527  if (!got_fmt && !got_xma2) {
528  av_log(s, AV_LOG_ERROR, "no 'fmt ' or 'XMA2' tag found\n");
529  return AVERROR_INVALIDDATA;
530  }
531 
532  if (data_ofs < 0) {
533  av_log(s, AV_LOG_ERROR, "no 'data' tag found\n");
534  return AVERROR_INVALIDDATA;
535  }
536 
537  avio_seek(pb, data_ofs, SEEK_SET);
538 
539  if (data_size > (INT64_MAX>>3)) {
540  av_log(s, AV_LOG_WARNING, "Data size %"PRId64" is too large\n", data_size);
541  data_size = 0;
542  }
543 
544  if ( st->codecpar->bit_rate > 0 && data_size > 0
545  && st->codecpar->sample_rate > 0
546  && sample_count > 0 && st->codecpar->channels > 1
547  && sample_count % st->codecpar->channels == 0) {
548  if (fabs(8.0 * data_size * st->codecpar->channels * st->codecpar->sample_rate /
549  sample_count /st->codecpar->bit_rate - 1.0) < 0.3)
550  sample_count /= st->codecpar->channels;
551  }
552 
553  if ( data_size > 0 && sample_count && st->codecpar->channels
554  && (data_size << 3) / sample_count / st->codecpar->channels > st->codecpar->bits_per_coded_sample + 1) {
555  av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
556  sample_count = 0;
557  }
558 
559  /* G.729 hack (for Ticket4577)
560  * FIXME: Come up with cleaner, more general solution */
561  if (st->codecpar->codec_id == AV_CODEC_ID_G729 && sample_count && (data_size << 3) > sample_count) {
562  av_log(s, AV_LOG_WARNING, "ignoring wrong sample_count %"PRId64"\n", sample_count);
563  sample_count = 0;
564  }
565 
566  if (!sample_count || av_get_exact_bits_per_sample(st->codecpar->codec_id) > 0)
567  if ( st->codecpar->channels
568  && data_size
570  && wav->data_end <= avio_size(pb))
571  sample_count = (data_size << 3)
572  /
573  (st->codecpar->channels * (uint64_t)av_get_bits_per_sample(st->codecpar->codec_id));
574 
575  if (sample_count)
576  st->duration = sample_count;
577 
579  st->codecpar->block_align == st->codecpar->channels * 4 &&
580  st->codecpar->bits_per_coded_sample == 32 &&
581  st->codecpar->extradata_size == 2 &&
582  AV_RL16(st->codecpar->extradata) == 1) {
585  } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S24LE &&
586  st->codecpar->block_align == st->codecpar->channels * 4 &&
587  st->codecpar->bits_per_coded_sample == 24) {
589  } else if (st->codecpar->codec_id == AV_CODEC_ID_XMA1 ||
591  st->codecpar->block_align = 2048;
592  } else if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_MS && st->codecpar->channels > 2) {
593  st->codecpar->block_align *= st->codecpar->channels;
594  }
595 
596  ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
598 
599  set_spdif(s, wav);
600 
601  return 0;
602 }
603 
604 /**
605  * Find chunk with w64 GUID by skipping over other chunks.
606  * @return the size of the found chunk
607  */
608 static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16])
609 {
610  uint8_t guid[16];
611  int64_t size;
612 
613  while (!avio_feof(pb)) {
614  avio_read(pb, guid, 16);
615  size = avio_rl64(pb);
616  if (size <= 24)
617  return AVERROR_INVALIDDATA;
618  if (!memcmp(guid, guid1, 16))
619  return size;
620  avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
621  }
622  return AVERROR_EOF;
623 }
624 
625 #define MAX_SIZE 4096
626 
627 static int wav_read_packet(AVFormatContext *s, AVPacket *pkt)
628 {
629  int ret, size;
630  int64_t left;
631  AVStream *st;
632  WAVDemuxContext *wav = s->priv_data;
633 
634  if (CONFIG_SPDIF_DEMUXER && wav->spdif == 1)
635  return ff_spdif_read_packet(s, pkt);
636 
637  if (wav->smv_data_ofs > 0) {
638  int64_t audio_dts, video_dts;
639 smv_retry:
640  audio_dts = (int32_t)s->streams[0]->cur_dts;
641  video_dts = (int32_t)s->streams[1]->cur_dts;
642 
643  if (audio_dts != AV_NOPTS_VALUE && video_dts != AV_NOPTS_VALUE) {
644  /*We always return a video frame first to get the pixel format first*/
645  wav->smv_last_stream = wav->smv_given_first ?
646  av_compare_ts(video_dts, s->streams[1]->time_base,
647  audio_dts, s->streams[0]->time_base) > 0 : 0;
648  wav->smv_given_first = 1;
649  }
650  wav->smv_last_stream = !wav->smv_last_stream;
651  wav->smv_last_stream |= wav->audio_eof;
652  wav->smv_last_stream &= !wav->smv_eof;
653  if (wav->smv_last_stream) {
654  uint64_t old_pos = avio_tell(s->pb);
655  uint64_t new_pos = wav->smv_data_ofs +
656  wav->smv_block * wav->smv_block_size;
657  if (avio_seek(s->pb, new_pos, SEEK_SET) < 0) {
658  ret = AVERROR_EOF;
659  goto smv_out;
660  }
661  size = avio_rl24(s->pb);
662  ret = av_get_packet(s->pb, pkt, size);
663  if (ret < 0)
664  goto smv_out;
665  pkt->pos -= 3;
666  pkt->pts = wav->smv_block * wav->smv_frames_per_jpeg + wav->smv_cur_pt;
667  wav->smv_cur_pt++;
668  if (wav->smv_frames_per_jpeg > 0)
669  wav->smv_cur_pt %= wav->smv_frames_per_jpeg;
670  if (!wav->smv_cur_pt)
671  wav->smv_block++;
672 
673  pkt->stream_index = 1;
674 smv_out:
675  avio_seek(s->pb, old_pos, SEEK_SET);
676  if (ret == AVERROR_EOF) {
677  wav->smv_eof = 1;
678  goto smv_retry;
679  }
680  return ret;
681  }
682  }
683 
684  st = s->streams[0];
685 
686  left = wav->data_end - avio_tell(s->pb);
687  if (wav->ignore_length)
688  left = INT_MAX;
689  if (left <= 0) {
690  if (CONFIG_W64_DEMUXER && wav->w64)
691  left = find_guid(s->pb, ff_w64_guid_data) - 24;
692  else
693  left = find_tag(wav, s->pb, MKTAG('d', 'a', 't', 'a'));
694  if (left < 0) {
695  wav->audio_eof = 1;
696  if (wav->smv_data_ofs > 0 && !wav->smv_eof)
697  goto smv_retry;
698  return AVERROR_EOF;
699  }
700  wav->data_end = avio_tell(s->pb) + left;
701  }
702 
703  size = MAX_SIZE;
704  if (st->codecpar->block_align > 1) {
705  if (size < st->codecpar->block_align)
706  size = st->codecpar->block_align;
707  size = (size / st->codecpar->block_align) * st->codecpar->block_align;
708  }
709  size = FFMIN(size, left);
710  ret = av_get_packet(s->pb, pkt, size);
711  if (ret < 0)
712  return ret;
713  pkt->stream_index = 0;
714 
715  return ret;
716 }
717 
718 static int wav_read_seek(AVFormatContext *s,
719  int stream_index, int64_t timestamp, int flags)
720 {
721  WAVDemuxContext *wav = s->priv_data;
722  AVStream *st;
723  wav->smv_eof = 0;
724  wav->audio_eof = 0;
725  if (wav->smv_data_ofs > 0) {
726  int64_t smv_timestamp = timestamp;
727  if (stream_index == 0)
728  smv_timestamp = av_rescale_q(timestamp, s->streams[0]->time_base, s->streams[1]->time_base);
729  else
730  timestamp = av_rescale_q(smv_timestamp, s->streams[1]->time_base, s->streams[0]->time_base);
731  if (wav->smv_frames_per_jpeg > 0) {
732  wav->smv_block = smv_timestamp / wav->smv_frames_per_jpeg;
733  wav->smv_cur_pt = smv_timestamp % wav->smv_frames_per_jpeg;
734  }
735  }
736 
737  st = s->streams[0];
738  switch (st->codecpar->codec_id) {
739  case AV_CODEC_ID_MP2:
740  case AV_CODEC_ID_MP3:
741  case AV_CODEC_ID_AC3:
742  case AV_CODEC_ID_DTS:
743  case AV_CODEC_ID_XMA2:
744  /* use generic seeking with dynamically generated indexes */
745  return -1;
746  default:
747  break;
748  }
749  return ff_pcm_read_seek(s, stream_index, timestamp, flags);
750 }
751 
752 #define OFFSET(x) offsetof(WAVDemuxContext, x)
753 #define DEC AV_OPT_FLAG_DECODING_PARAM
754 static const AVOption demux_options[] = {
755  { "ignore_length", "Ignore length", OFFSET(ignore_length), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, DEC },
756  { NULL },
757 };
758 
759 static const AVClass wav_demuxer_class = {
760  .class_name = "WAV demuxer",
761  .item_name = av_default_item_name,
762  .option = demux_options,
763  .version = LIBAVUTIL_VERSION_INT,
764 };
766  .name = "wav",
767  .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
768  .priv_data_size = sizeof(WAVDemuxContext),
769  .read_probe = wav_probe,
770  .read_header = wav_read_header,
771  .read_packet = wav_read_packet,
772  .read_seek = wav_read_seek,
774  .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
775  .priv_class = &wav_demuxer_class,
776 };
777 #endif /* CONFIG_WAV_DEMUXER */
778 
779 #if CONFIG_W64_DEMUXER
780 static int w64_probe(const AVProbeData *p)
781 {
782  if (p->buf_size <= 40)
783  return 0;
784  if (!memcmp(p->buf, ff_w64_guid_riff, 16) &&
785  !memcmp(p->buf + 24, ff_w64_guid_wave, 16))
786  return AVPROBE_SCORE_MAX;
787  else
788  return 0;
789 }
790 
791 static int w64_read_header(AVFormatContext *s)
792 {
793  int64_t size, data_ofs = 0;
794  AVIOContext *pb = s->pb;
795  WAVDemuxContext *wav = s->priv_data;
796  AVStream *st;
797  uint8_t guid[16];
798  int ret;
799 
800  avio_read(pb, guid, 16);
801  if (memcmp(guid, ff_w64_guid_riff, 16))
802  return AVERROR_INVALIDDATA;
803 
804  /* riff + wave + fmt + sizes */
805  if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8)
806  return AVERROR_INVALIDDATA;
807 
808  avio_read(pb, guid, 16);
809  if (memcmp(guid, ff_w64_guid_wave, 16)) {
810  av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
811  return AVERROR_INVALIDDATA;
812  }
813 
814  wav->w64 = 1;
815 
816  st = avformat_new_stream(s, NULL);
817  if (!st)
818  return AVERROR(ENOMEM);
819 
820  while (!avio_feof(pb)) {
821  if (avio_read(pb, guid, 16) != 16)
822  break;
823  size = avio_rl64(pb);
824  if (size <= 24 || INT64_MAX - size < avio_tell(pb))
825  return AVERROR_INVALIDDATA;
826 
827  if (!memcmp(guid, ff_w64_guid_fmt, 16)) {
828  /* subtract chunk header size - normal wav file doesn't count it */
829  ret = ff_get_wav_header(s, pb, st->codecpar, size - 24, 0);
830  if (ret < 0)
831  return ret;
832  avio_skip(pb, FFALIGN(size, INT64_C(8)) - size);
833 
834  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
835  } else if (!memcmp(guid, ff_w64_guid_fact, 16)) {
836  int64_t samples;
837 
838  samples = avio_rl64(pb);
839  if (samples > 0)
840  st->duration = samples;
841  avio_skip(pb, FFALIGN(size, INT64_C(8)) - 32);
842  } else if (!memcmp(guid, ff_w64_guid_data, 16)) {
843  wav->data_end = avio_tell(pb) + size - 24;
844 
845  data_ofs = avio_tell(pb);
846  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
847  break;
848 
849  avio_skip(pb, size - 24);
850  } else if (!memcmp(guid, ff_w64_guid_summarylist, 16)) {
851  int64_t start, end, cur;
852  uint32_t count, chunk_size, i;
853 
854  start = avio_tell(pb);
855  end = start + FFALIGN(size, INT64_C(8)) - 24;
856  count = avio_rl32(pb);
857 
858  for (i = 0; i < count; i++) {
859  char chunk_key[5], *value;
860 
861  if (avio_feof(pb) || (cur = avio_tell(pb)) < 0 || cur > end - 8 /* = tag + size */)
862  break;
863 
864  chunk_key[4] = 0;
865  avio_read(pb, chunk_key, 4);
866  chunk_size = avio_rl32(pb);
867  if (chunk_size == UINT32_MAX)
868  return AVERROR_INVALIDDATA;
869 
870  value = av_mallocz(chunk_size + 1);
871  if (!value)
872  return AVERROR(ENOMEM);
873 
874  ret = avio_get_str16le(pb, chunk_size, value, chunk_size);
875  avio_skip(pb, chunk_size - ret);
876 
877  av_dict_set(&s->metadata, chunk_key, value, AV_DICT_DONT_STRDUP_VAL);
878  }
879 
880  avio_skip(pb, end - avio_tell(pb));
881  } else {
882  av_log(s, AV_LOG_DEBUG, "unknown guid: "FF_PRI_GUID"\n", FF_ARG_GUID(guid));
883  avio_skip(pb, FFALIGN(size, INT64_C(8)) - 24);
884  }
885  }
886 
887  if (!data_ofs)
888  return AVERROR_EOF;
889 
890  ff_metadata_conv_ctx(s, NULL, wav_metadata_conv);
892 
893  handle_stream_probing(st);
895 
896  avio_seek(pb, data_ofs, SEEK_SET);
897 
898  set_spdif(s, wav);
899 
900  return 0;
901 }
902 
904  .name = "w64",
905  .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
906  .priv_data_size = sizeof(WAVDemuxContext),
907  .read_probe = w64_probe,
908  .read_header = w64_read_header,
909  .read_packet = wav_read_packet,
910  .read_seek = wav_read_seek,
912  .codec_tag = (const AVCodecTag * const []) { ff_codec_wav_tags, 0 },
913 };
914 #endif /* CONFIG_W64_DEMUXER */
int ff_read_riff_info(AVFormatContext *s, int64_t size)
Definition: riffdec.c:228
#define NULL
Definition: coverity.c:32
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1261
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:139
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:334
const uint8_t ff_w64_guid_wave[16]
Definition: w64.c:28
Buffered I/O operations.
version
Definition: libkvazaar.c:292
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: packet.h:375
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:4938
int probe_packets
Number of packets to buffer for codec probing.
Definition: avformat.h:1086
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
#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:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
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:329
static void set_spdif(AVFormatContext *s, WAVDemuxContext *wav)
Definition: wavdec.c:64
const char * key
static AVPacket pkt
#define MAX_SIZE
Definition: vf_unsharp.c:305
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:1351
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:1079
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: codec_par.h:126
AVOptions.
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
int id
Format-specific stream ID.
Definition: avformat.h:883
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1170
uint32_t tag
Definition: movenc.c:1532
#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:304
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:899
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
channels
Definition: aptx.h:33
#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:799
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
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: codec_par.h:89
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:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#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:1552
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#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
unsigned int pos
Definition: spdifenc.c:410
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:411
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1114
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:239
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:93
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:506
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: codec_par.h:78
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
AVInputFormat ff_wav_demuxer
#define CONFIG_W64_DEMUXER
Definition: config.h:2349
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int block_align
Audio only.
Definition: codec_par.h:177
#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:3321
#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:1468
#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:527
Stream structure.
Definition: avformat.h:876
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:1393
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:1130
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:463
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:451
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
const AVMetadataConv ff_riff_info_conv[]
Definition: riff.c:591
#define flags(name, subs,...)
Definition: cbs_av1.c:564
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:3387
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:982
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
int smv_given_first
Definition: wavdec.c:59
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
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:3339
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:1102
int smv_block
Definition: wavdec.c:52
int len
void * priv_data
Format private data.
Definition: avformat.h:1379
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: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int channels
Audio only.
Definition: codec_par.h:166
#define av_uninit(x)
Definition: attributes.h:154
AVInputFormat ff_w64_demuxer
#define CONFIG_SPDIF_DEMUXER
Definition: config.h:2316
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:739
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
#define MKTAG(a, b, c, d)
Definition: common.h:406
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: avformat.h:1133
This structure stores compressed data.
Definition: packet.h:332
uint64_t avio_rl64(AVIOContext *s)
Definition: aviobuf.c:755
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
#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