FFmpeg
oggparsevorbis.c
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1 /*
2  * Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
3  *
4  * Permission is hereby granted, free of charge, to any person
5  * obtaining a copy of this software and associated documentation
6  * files (the "Software"), to deal in the Software without
7  * restriction, including without limitation the rights to use, copy,
8  * modify, merge, publish, distribute, sublicense, and/or sell copies
9  * of the Software, and to permit persons to whom the Software is
10  * furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be
13  * included in all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  */
24 
25 #include <stdlib.h>
26 
27 #include "libavutil/avstring.h"
28 #include "libavutil/base64.h"
29 #include "libavutil/bswap.h"
30 #include "libavutil/dict.h"
31 
32 #include "libavcodec/bytestream.h"
34 
35 #include "avformat.h"
36 #include "flac_picture.h"
37 #include "internal.h"
38 #include "oggdec.h"
39 #include "vorbiscomment.h"
40 #include "replaygain.h"
41 
43 {
44  int i, cnum, h, m, s, ms, keylen = strlen(key);
45  AVChapter *chapter = NULL;
46 
47  if (keylen < 9 || av_strncasecmp(key, "CHAPTER", 7) || sscanf(key+7, "%03d", &cnum) != 1)
48  return 0;
49 
50  if (keylen <= 10) {
51  if (sscanf(val, "%02d:%02d:%02d.%03d", &h, &m, &s, &ms) < 4)
52  return 0;
53 
54  avpriv_new_chapter(as, cnum, (AVRational) { 1, 1000 },
55  ms + 1000 * (s + 60 * (m + 60 * h)),
57  av_free(val);
58  } else if (!av_strcasecmp(key + keylen - 4, "NAME")) {
59  for (i = 0; i < as->nb_chapters; i++)
60  if (as->chapters[i]->id == cnum) {
61  chapter = as->chapters[i];
62  break;
63  }
64  if (!chapter)
65  return 0;
66 
67  av_dict_set(&chapter->metadata, "title", val, AV_DICT_DONT_STRDUP_VAL);
68  } else
69  return 0;
70 
71  av_free(key);
72  return 1;
73 }
74 
76  const uint8_t *buf, int size)
77 {
78  int updates = ff_vorbis_comment(as, &st->metadata, buf, size, 1);
79 
80  if (updates > 0) {
82  }
83 
84  return updates;
85 }
86 
88  const uint8_t *buf, int size,
89  int parse_picture)
90 {
91  const uint8_t *p = buf;
92  const uint8_t *end = buf + size;
93  int updates = 0;
94  unsigned n;
95  int s;
96 
97  /* must have vendor_length and user_comment_list_length */
98  if (size < 8)
99  return AVERROR_INVALIDDATA;
100 
101  s = bytestream_get_le32(&p);
102 
103  if (end - p - 4 < s || s < 0)
104  return AVERROR_INVALIDDATA;
105 
106  p += s;
107 
108  n = bytestream_get_le32(&p);
109 
110  while (end - p >= 4 && n > 0) {
111  const char *t, *v;
112  int tl, vl;
113 
114  s = bytestream_get_le32(&p);
115 
116  if (end - p < s || s < 0)
117  break;
118 
119  t = p;
120  p += s;
121  n--;
122 
123  v = memchr(t, '=', s);
124  if (!v)
125  continue;
126 
127  tl = v - t;
128  vl = s - tl - 1;
129  v++;
130 
131  if (tl && vl) {
132  char *tt, *ct;
133 
134  tt = av_malloc(tl + 1);
135  ct = av_malloc(vl + 1);
136  if (!tt || !ct) {
137  av_freep(&tt);
138  av_freep(&ct);
139  return AVERROR(ENOMEM);
140  }
141 
142  memcpy(tt, t, tl);
143  tt[tl] = 0;
144 
145  memcpy(ct, v, vl);
146  ct[vl] = 0;
147 
148  /* The format in which the pictures are stored is the FLAC format.
149  * Xiph says: "The binary FLAC picture structure is base64 encoded
150  * and placed within a VorbisComment with the tag name
151  * 'METADATA_BLOCK_PICTURE'. This is the preferred and
152  * recommended way of embedding cover art within VorbisComments."
153  */
154  if (!strcmp(tt, "METADATA_BLOCK_PICTURE") && parse_picture) {
155  int ret, len = AV_BASE64_DECODE_SIZE(vl);
156  char *pict = av_malloc(len);
157 
158  if (!pict) {
159  av_log(as, AV_LOG_WARNING, "out-of-memory error. Skipping cover art block.\n");
160  av_freep(&tt);
161  av_freep(&ct);
162  continue;
163  }
164  ret = av_base64_decode(pict, ct, len);
165  av_freep(&tt);
166  av_freep(&ct);
167  if (ret > 0)
168  ret = ff_flac_parse_picture(as, pict, ret);
169  av_freep(&pict);
170  if (ret < 0) {
171  av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
172  continue;
173  }
174  } else if (!ogm_chapter(as, tt, ct)) {
175  updates++;
176  if (av_dict_get(*m, tt, NULL, 0)) {
177  av_dict_set(m, tt, ";", AV_DICT_APPEND);
178  }
179  av_dict_set(m, tt, ct,
182  av_freep(&ct);
183  }
184  }
185  }
186 
187  if (p != end)
188  av_log(as, AV_LOG_INFO,
189  "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p);
190  if (n > 0)
191  av_log(as, AV_LOG_INFO,
192  "truncated comment header, %i comments not found\n", n);
193 
195 
196  return updates;
197 }
198 
199 /*
200  * Parse the vorbis header
201  *
202  * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
203  * [vorbis_version] = read 32 bits as unsigned integer | Not used
204  * [audio_channels] = read 8 bit integer as unsigned | Used
205  * [audio_sample_rate] = read 32 bits as unsigned integer | Used
206  * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
207  * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
208  * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
209  * [blocksize_0] = read 4 bits as unsigned integer | Not Used
210  * [blocksize_1] = read 4 bits as unsigned integer | Not Used
211  * [framing_flag] = read one bit | Not Used
212  */
213 
215  unsigned int len[3];
216  unsigned char *packet[3];
218  int64_t final_pts;
220 };
221 
223  struct oggvorbis_private *priv,
224  uint8_t **buf)
225 {
226  int i, offset, len, err;
227  int buf_len;
228  unsigned char *ptr;
229 
230  len = priv->len[0] + priv->len[1] + priv->len[2];
231  buf_len = len + len / 255 + 64;
232 
233  if (*buf)
234  return AVERROR_INVALIDDATA;
235 
236  ptr = *buf = av_realloc(NULL, buf_len);
237  if (!ptr)
238  return AVERROR(ENOMEM);
239  memset(*buf, '\0', buf_len);
240 
241  ptr[0] = 2;
242  offset = 1;
243  offset += av_xiphlacing(&ptr[offset], priv->len[0]);
244  offset += av_xiphlacing(&ptr[offset], priv->len[1]);
245  for (i = 0; i < 3; i++) {
246  memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
247  offset += priv->len[i];
248  av_freep(&priv->packet[i]);
249  }
250  if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0)
251  return err;
252  return offset;
253 }
254 
255 static void vorbis_cleanup(AVFormatContext *s, int idx)
256 {
257  struct ogg *ogg = s->priv_data;
258  struct ogg_stream *os = ogg->streams + idx;
259  struct oggvorbis_private *priv = os->private;
260  int i;
261  if (os->private) {
262  av_vorbis_parse_free(&priv->vp);
263  for (i = 0; i < 3; i++)
264  av_freep(&priv->packet[i]);
265  }
266 }
267 
269 {
270  struct ogg *ogg = s->priv_data;
271  struct ogg_stream *os = ogg->streams + idx;
272  AVStream *st = s->streams[idx];
273  int ret;
274 
275  if (os->psize <= 8)
276  return 0;
277 
278  /* New metadata packet; release old data. */
279  av_dict_free(&st->metadata);
280  ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
281  os->psize - 8);
282  if (ret < 0)
283  return ret;
284 
285  /* Update the metadata if possible. */
286  av_freep(&os->new_metadata);
287  if (st->metadata) {
289  /* Send an empty dictionary to indicate that metadata has been cleared. */
290  } else {
291  os->new_metadata = av_malloc(1);
292  os->new_metadata_size = 0;
293  }
294 
295  return ret;
296 }
297 
298 static int vorbis_header(AVFormatContext *s, int idx)
299 {
300  struct ogg *ogg = s->priv_data;
301  AVStream *st = s->streams[idx];
302  struct ogg_stream *os = ogg->streams + idx;
303  struct oggvorbis_private *priv;
304  int pkt_type = os->buf[os->pstart];
305 
306  if (!os->private) {
307  os->private = av_mallocz(sizeof(struct oggvorbis_private));
308  if (!os->private)
309  return AVERROR(ENOMEM);
310  }
311 
312  priv = os->private;
313 
314  if (!(pkt_type & 1))
315  return priv->vp ? 0 : AVERROR_INVALIDDATA;
316 
317  if (os->psize < 1 || pkt_type > 5)
318  return AVERROR_INVALIDDATA;
319 
320  if (priv->packet[pkt_type >> 1])
321  return AVERROR_INVALIDDATA;
322  if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
323  return priv->vp ? 0 : AVERROR_INVALIDDATA;
324 
325  priv->len[pkt_type >> 1] = os->psize;
326  priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
327  if (!priv->packet[pkt_type >> 1])
328  return AVERROR(ENOMEM);
329  memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
330  if (os->buf[os->pstart] == 1) {
331  const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
332  unsigned blocksize, bs0, bs1;
333  int srate;
334  int channels;
335 
336  if (os->psize != 30)
337  return AVERROR_INVALIDDATA;
338 
339  if (bytestream_get_le32(&p) != 0) /* vorbis_version */
340  return AVERROR_INVALIDDATA;
341 
342  channels = bytestream_get_byte(&p);
343  if (st->codecpar->channels && channels != st->codecpar->channels) {
344  av_log(s, AV_LOG_ERROR, "Channel change is not supported\n");
345  return AVERROR_PATCHWELCOME;
346  }
347  st->codecpar->channels = channels;
348  srate = bytestream_get_le32(&p);
349  p += 4; // skip maximum bitrate
350  st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate
351  p += 4; // skip minimum bitrate
352 
353  blocksize = bytestream_get_byte(&p);
354  bs0 = blocksize & 15;
355  bs1 = blocksize >> 4;
356 
357  if (bs0 > bs1)
358  return AVERROR_INVALIDDATA;
359  if (bs0 < 6 || bs1 > 13)
360  return AVERROR_INVALIDDATA;
361 
362  if (bytestream_get_byte(&p) != 1) /* framing_flag */
363  return AVERROR_INVALIDDATA;
364 
367 
368  if (srate > 0) {
369  st->codecpar->sample_rate = srate;
370  avpriv_set_pts_info(st, 64, 1, srate);
371  }
372  } else if (os->buf[os->pstart] == 3) {
373  if (vorbis_update_metadata(s, idx) >= 0 && priv->len[1] > 10) {
374  unsigned new_len;
375 
376  int ret = ff_replaygain_export(st, st->metadata);
377  if (ret < 0)
378  return ret;
379 
380  // drop all metadata we parsed and which is not required by libvorbis
381  new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
382  if (new_len >= 16 && new_len < os->psize) {
383  AV_WL32(priv->packet[1] + new_len - 5, 0);
384  priv->packet[1][new_len - 1] = 1;
385  priv->len[1] = new_len;
386  }
387  }
388  } else {
389  int ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata);
390  if (ret < 0) {
391  st->codecpar->extradata_size = 0;
392  return ret;
393  }
394  st->codecpar->extradata_size = ret;
395 
397  if (!priv->vp) {
398  av_freep(&st->codecpar->extradata);
399  st->codecpar->extradata_size = 0;
400  return AVERROR_UNKNOWN;
401  }
402  }
403 
404  return 1;
405 }
406 
407 static int vorbis_packet(AVFormatContext *s, int idx)
408 {
409  struct ogg *ogg = s->priv_data;
410  struct ogg_stream *os = ogg->streams + idx;
411  struct oggvorbis_private *priv = os->private;
412  int duration, flags = 0;
413 
414  if (!priv->vp)
415  return AVERROR_INVALIDDATA;
416 
417  /* first packet handling
418  * here we parse the duration of each packet in the first page and compare
419  * the total duration to the page granule to find the encoder delay and
420  * set the first timestamp */
421  if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS) && (int64_t)os->granule>=0) {
422  int seg, d;
423  uint8_t *last_pkt = os->buf + os->pstart;
424  uint8_t *next_pkt = last_pkt;
425 
426  av_vorbis_parse_reset(priv->vp);
427  duration = 0;
428  seg = os->segp;
429  d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
430  if (d < 0) {
432  return 0;
433  } else if (flags & VORBIS_FLAG_COMMENT) {
434  vorbis_update_metadata(s, idx);
435  flags = 0;
436  }
437  duration += d;
438  last_pkt = next_pkt = next_pkt + os->psize;
439  for (; seg < os->nsegs; seg++) {
440  if (os->segments[seg] < 255) {
441  int d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
442  if (d < 0) {
443  duration = os->granule;
444  break;
445  } else if (flags & VORBIS_FLAG_COMMENT) {
446  vorbis_update_metadata(s, idx);
447  flags = 0;
448  }
449  duration += d;
450  last_pkt = next_pkt + os->segments[seg];
451  }
452  next_pkt += os->segments[seg];
453  }
454  os->lastpts =
455  os->lastdts = os->granule - duration;
456 
457  if (!os->granule && duration) //hack to deal with broken files (Ticket3710)
458  os->lastpts = os->lastdts = AV_NOPTS_VALUE;
459 
460  if (s->streams[idx]->start_time == AV_NOPTS_VALUE) {
461  s->streams[idx]->start_time = FFMAX(os->lastpts, 0);
462  if (s->streams[idx]->duration != AV_NOPTS_VALUE)
463  s->streams[idx]->duration -= s->streams[idx]->start_time;
464  }
465  priv->final_pts = AV_NOPTS_VALUE;
466  av_vorbis_parse_reset(priv->vp);
467  }
468 
469  /* parse packet duration */
470  if (os->psize > 0) {
471  duration = av_vorbis_parse_frame_flags(priv->vp, os->buf + os->pstart, 1, &flags);
472  if (duration < 0) {
474  return 0;
475  } else if (flags & VORBIS_FLAG_COMMENT) {
476  vorbis_update_metadata(s, idx);
477  flags = 0;
478  }
479  os->pduration = duration;
480  }
481 
482  /* final packet handling
483  * here we save the pts of the first packet in the final page, sum up all
484  * packet durations in the final page except for the last one, and compare
485  * to the page granule to find the duration of the final packet */
486  if (os->flags & OGG_FLAG_EOS) {
487  if (os->lastpts != AV_NOPTS_VALUE) {
488  priv->final_pts = os->lastpts;
489  priv->final_duration = 0;
490  }
491  if (os->segp == os->nsegs)
492  os->pduration = os->granule - priv->final_pts - priv->final_duration;
493  priv->final_duration += os->pduration;
494  }
495 
496  return 0;
497 }
498 
499 const struct ogg_codec ff_vorbis_codec = {
500  .magic = "\001vorbis",
501  .magicsize = 7,
502  .header = vorbis_header,
503  .packet = vorbis_packet,
504  .cleanup = vorbis_cleanup,
505  .nb_header = 3,
506 };
unsigned int nb_chapters
Number of chapters in AVChapter array.
Definition: avformat.h:1587
int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, const uint8_t *buf, int size)
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:863
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int vorbis_header(AVFormatContext *s, int idx)
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:995
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition: oggdec.h:31
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
unsigned int pflags
Definition: oggdec.h:67
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
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:4930
static int fixup_vorbis_headers(AVFormatContext *as, struct oggvorbis_private *priv, uint8_t **buf)
int event_flags
Flags for the user to detect events happening on the stream.
Definition: avformat.h:994
channels
Definition: aptx.c:30
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3971
AVVorbisParseContext * av_vorbis_parse_init(const uint8_t *extradata, int extradata_size)
Allocate and initialize the Vorbis parser using headers in the extradata.
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
const char * key
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 flags
Definition: oggdec.h:76
int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
AVDictionary * metadata
Definition: avformat.h:1319
unsigned char * packet[3]
int64_t lastpts
Definition: oggdec.h:72
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that&#39;s been allocated with av_malloc() or another memory allocation function...
Definition: dict.h:73
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4631
Format I/O context.
Definition: avformat.h:1358
unsigned int psize
Definition: oggdec.h:66
Public dictionary API.
uint8_t
#define av_malloc(s)
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int id
unique ID to identify the chapter
Definition: avformat.h:1316
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
int64_t duration
Definition: movenc.c:63
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
A public API for Vorbis parsing.
ptrdiff_t size
Definition: opengl_enc.c:100
int ff_replaygain_export(AVStream *st, AVDictionary *metadata)
Parse replaygain tags and export them as per-stream side data.
Definition: replaygain.c:91
static void vorbis_cleanup(AVFormatContext *s, int idx)
#define av_log(a,...)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4000
const AVMetadataConv ff_vorbiscomment_metadata_conv[]
VorbisComment metadata conversion mapping.
Definition: vorbiscomment.c:33
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void av_vorbis_parse_free(AVVorbisParseContext **s)
Free the parser and everything associated with it.
#define PTRDIFF_SPECIFIER
Definition: internal.h:261
#define OGG_FLAG_EOS
Definition: oggdec.h:112
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3967
AVChapter ** chapters
Definition: avformat.h:1588
#define FFMAX(a, b)
Definition: common.h:94
uint8_t segments[255]
Definition: oggdec.h:80
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3989
unsigned int new_metadata_size
Definition: oggdec.h:89
uint64_t granule
Definition: oggdec.h:70
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
#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
unsigned int pstart
Definition: oggdec.h:65
struct ogg_stream * streams
Definition: oggdec.h:102
int segp
Definition: oggdec.h:79
static int ogm_chapter(AVFormatContext *as, uint8_t *key, uint8_t *val)
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_DICT_APPEND
If the entry already exists, append to it.
Definition: dict.h:80
int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
Definition: flac_picture.c:30
static int vorbis_update_metadata(AVFormatContext *s, int idx)
int n
Definition: avisynth_c.h:760
AVDictionary * metadata
Definition: avformat.h:945
#define VORBIS_FLAG_COMMENT
Definition: vorbis_parser.h:45
Stream structure.
Definition: avformat.h:881
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
unsigned int pduration
Definition: oggdec.h:68
int nsegs
Definition: oggdec.h:79
unsigned int len[3]
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
Definition: avpacket.c:488
void * buf
Definition: avisynth_c.h:766
void * private
Definition: oggdec.h:90
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
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
Encode extradata length to a buffer.
Definition: utils.c:1763
Rational number (pair of numerator and denominator).
Definition: rational.h:58
uint8_t * new_metadata
Definition: oggdec.h:88
byte swapping routines
int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf, int buf_size, int *flags)
Get the duration for a Vorbis packet.
int64_t lastdts
Definition: oggdec.h:73
AVVorbisParseContext * vp
#define flags(name, subs,...)
Definition: cbs_av1.c:561
const int8_t * magic
Definition: oggdec.h:32
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int sample_rate
Audio only.
Definition: avcodec.h:4081
uint8_t * buf
Definition: oggdec.h:62
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:920
static int vorbis_packet(AVFormatContext *s, int idx)
#define AV_BASE64_DECODE_SIZE(x)
Calculate the output size in bytes needed to decode a base64 string with length x to a data buffer...
Definition: base64.h:48
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: avcodec.h:1516
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:796
#define av_free(p)
Definition: oggdec.h:101
int len
void * priv_data
Format private data.
Definition: avformat.h:1386
const struct ogg_codec ff_vorbis_codec
int av_base64_decode(uint8_t *out, const char *in_str, int out_size)
Decode a base64-encoded string.
Definition: base64.c:79
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3985
int channels
Audio only.
Definition: avcodec.h:4077
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
void av_vorbis_parse_reset(AVVorbisParseContext *s)
#define AV_WL32(p, v)
Definition: intreadwrite.h:426