FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
oggparsevorbis.c
Go to the documentation of this file.
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 || sscanf(key, "CHAPTER%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 (!strcmp(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, j;
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  for (j = 0; j < tl; j++)
143  tt[j] = av_toupper(t[j]);
144  tt[tl] = 0;
145 
146  memcpy(ct, v, vl);
147  ct[vl] = 0;
148 
149  /* The format in which the pictures are stored is the FLAC format.
150  * Xiph says: "The binary FLAC picture structure is base64 encoded
151  * and placed within a VorbisComment with the tag name
152  * 'METADATA_BLOCK_PICTURE'. This is the preferred and
153  * recommended way of embedding cover art within VorbisComments."
154  */
155  if (!strcmp(tt, "METADATA_BLOCK_PICTURE") && parse_picture) {
156  int ret, len = AV_BASE64_DECODE_SIZE(vl);
157  char *pict = av_malloc(len);
158 
159  if (!pict) {
160  av_log(as, AV_LOG_WARNING, "out-of-memory error. Skipping cover art block.\n");
161  av_freep(&tt);
162  av_freep(&ct);
163  continue;
164  }
165  ret = av_base64_decode(pict, ct, len);
166  av_freep(&tt);
167  av_freep(&ct);
168  if (ret > 0)
169  ret = ff_flac_parse_picture(as, pict, ret);
170  av_freep(&pict);
171  if (ret < 0) {
172  av_log(as, AV_LOG_WARNING, "Failed to parse cover art block.\n");
173  continue;
174  }
175  } else if (!ogm_chapter(as, tt, ct)) {
176  updates++;
177  if (av_dict_get(*m, tt, NULL, 0)) {
178  av_dict_set(m, tt, ";", AV_DICT_APPEND);
179  }
180  av_dict_set(m, tt, ct,
183  av_freep(&ct);
184  }
185  }
186  }
187 
188  if (p != end)
189  av_log(as, AV_LOG_INFO,
190  "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p);
191  if (n > 0)
192  av_log(as, AV_LOG_INFO,
193  "truncated comment header, %i comments not found\n", n);
194 
196 
197  return updates;
198 }
199 
200 /*
201  * Parse the vorbis header
202  *
203  * Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
204  * [vorbis_version] = read 32 bits as unsigned integer | Not used
205  * [audio_channels] = read 8 bit integer as unsigned | Used
206  * [audio_sample_rate] = read 32 bits as unsigned integer | Used
207  * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
208  * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
209  * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
210  * [blocksize_0] = read 4 bits as unsigned integer | Not Used
211  * [blocksize_1] = read 4 bits as unsigned integer | Not Used
212  * [framing_flag] = read one bit | Not Used
213  */
214 
216  unsigned int len[3];
217  unsigned char *packet[3];
219  int64_t final_pts;
221 };
222 
224  struct oggvorbis_private *priv,
225  uint8_t **buf)
226 {
227  int i, offset, len, err;
228  int buf_len;
229  unsigned char *ptr;
230 
231  len = priv->len[0] + priv->len[1] + priv->len[2];
232  buf_len = len + len / 255 + 64;
233  ptr = *buf = av_realloc(NULL, buf_len);
234  if (!ptr)
235  return AVERROR(ENOMEM);
236  memset(*buf, '\0', buf_len);
237 
238  ptr[0] = 2;
239  offset = 1;
240  offset += av_xiphlacing(&ptr[offset], priv->len[0]);
241  offset += av_xiphlacing(&ptr[offset], priv->len[1]);
242  for (i = 0; i < 3; i++) {
243  memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
244  offset += priv->len[i];
245  av_freep(&priv->packet[i]);
246  }
247  if ((err = av_reallocp(buf, offset + AV_INPUT_BUFFER_PADDING_SIZE)) < 0)
248  return err;
249  return offset;
250 }
251 
252 static void vorbis_cleanup(AVFormatContext *s, int idx)
253 {
254  struct ogg *ogg = s->priv_data;
255  struct ogg_stream *os = ogg->streams + idx;
256  struct oggvorbis_private *priv = os->private;
257  int i;
258  if (os->private) {
259  av_vorbis_parse_free(&priv->vp);
260  for (i = 0; i < 3; i++)
261  av_freep(&priv->packet[i]);
262  }
263 }
264 
266 {
267  struct ogg *ogg = s->priv_data;
268  struct ogg_stream *os = ogg->streams + idx;
269  AVStream *st = s->streams[idx];
270  int ret;
271 
272  if (os->psize <= 8)
273  return 0;
274 
275  /* New metadata packet; release old data. */
276  av_dict_free(&st->metadata);
277  ret = ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 7,
278  os->psize - 8);
279  if (ret < 0)
280  return ret;
281 
282  /* Update the metadata if possible. */
283  av_freep(&os->new_metadata);
284  if (st->metadata) {
286  /* Send an empty dictionary to indicate that metadata has been cleared. */
287  } else {
288  os->new_metadata = av_malloc(1);
289  os->new_metadata_size = 0;
290  }
291 
292  return ret;
293 }
294 
295 static int vorbis_header(AVFormatContext *s, int idx)
296 {
297  struct ogg *ogg = s->priv_data;
298  AVStream *st = s->streams[idx];
299  struct ogg_stream *os = ogg->streams + idx;
300  struct oggvorbis_private *priv;
301  int pkt_type = os->buf[os->pstart];
302 
303  if (!os->private) {
304  os->private = av_mallocz(sizeof(struct oggvorbis_private));
305  if (!os->private)
306  return AVERROR(ENOMEM);
307  }
308 
309  priv = os->private;
310 
311  if (!(pkt_type & 1))
312  return priv->vp ? 0 : AVERROR_INVALIDDATA;
313 
314  if (os->psize < 1 || pkt_type > 5)
315  return AVERROR_INVALIDDATA;
316 
317  if (priv->packet[pkt_type >> 1])
318  return AVERROR_INVALIDDATA;
319  if (pkt_type > 1 && !priv->packet[0] || pkt_type > 3 && !priv->packet[1])
320  return AVERROR_INVALIDDATA;
321 
322  priv->len[pkt_type >> 1] = os->psize;
323  priv->packet[pkt_type >> 1] = av_mallocz(os->psize);
324  if (!priv->packet[pkt_type >> 1])
325  return AVERROR(ENOMEM);
326  memcpy(priv->packet[pkt_type >> 1], os->buf + os->pstart, os->psize);
327  if (os->buf[os->pstart] == 1) {
328  const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
329  unsigned blocksize, bs0, bs1;
330  int srate;
331  int channels;
332 
333  if (os->psize != 30)
334  return AVERROR_INVALIDDATA;
335 
336  if (bytestream_get_le32(&p) != 0) /* vorbis_version */
337  return AVERROR_INVALIDDATA;
338 
339  channels = bytestream_get_byte(&p);
340  if (st->codecpar->channels && channels != st->codecpar->channels) {
341  av_log(s, AV_LOG_ERROR, "Channel change is not supported\n");
342  return AVERROR_PATCHWELCOME;
343  }
344  st->codecpar->channels = channels;
345  srate = bytestream_get_le32(&p);
346  p += 4; // skip maximum bitrate
347  st->codecpar->bit_rate = bytestream_get_le32(&p); // nominal bitrate
348  p += 4; // skip minimum bitrate
349 
350  blocksize = bytestream_get_byte(&p);
351  bs0 = blocksize & 15;
352  bs1 = blocksize >> 4;
353 
354  if (bs0 > bs1)
355  return AVERROR_INVALIDDATA;
356  if (bs0 < 6 || bs1 > 13)
357  return AVERROR_INVALIDDATA;
358 
359  if (bytestream_get_byte(&p) != 1) /* framing_flag */
360  return AVERROR_INVALIDDATA;
361 
364 
365  if (srate > 0) {
366  st->codecpar->sample_rate = srate;
367  avpriv_set_pts_info(st, 64, 1, srate);
368  }
369  } else if (os->buf[os->pstart] == 3) {
370  if (vorbis_update_metadata(s, idx) >= 0 && priv->len[1] > 10) {
371  unsigned new_len;
372 
373  int ret = ff_replaygain_export(st, st->metadata);
374  if (ret < 0)
375  return ret;
376 
377  // drop all metadata we parsed and which is not required by libvorbis
378  new_len = 7 + 4 + AV_RL32(priv->packet[1] + 7) + 4 + 1;
379  if (new_len >= 16 && new_len < os->psize) {
380  AV_WL32(priv->packet[1] + new_len - 5, 0);
381  priv->packet[1][new_len - 1] = 1;
382  priv->len[1] = new_len;
383  }
384  }
385  } else {
386  int ret = fixup_vorbis_headers(s, priv, &st->codecpar->extradata);
387  if (ret < 0) {
388  st->codecpar->extradata_size = 0;
389  return ret;
390  }
391  st->codecpar->extradata_size = ret;
392 
394  if (!priv->vp) {
395  av_freep(&st->codecpar->extradata);
396  st->codecpar->extradata_size = 0;
397  return AVERROR_UNKNOWN;
398  }
399  }
400 
401  return 1;
402 }
403 
404 static int vorbis_packet(AVFormatContext *s, int idx)
405 {
406  struct ogg *ogg = s->priv_data;
407  struct ogg_stream *os = ogg->streams + idx;
408  struct oggvorbis_private *priv = os->private;
409  int duration, flags = 0;
410 
411  if (!priv->vp)
412  return AVERROR_INVALIDDATA;
413 
414  /* first packet handling
415  * here we parse the duration of each packet in the first page and compare
416  * the total duration to the page granule to find the encoder delay and
417  * set the first timestamp */
418  if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS) && (int64_t)os->granule>=0) {
419  int seg, d;
420  uint8_t *last_pkt = os->buf + os->pstart;
421  uint8_t *next_pkt = last_pkt;
422 
423  av_vorbis_parse_reset(priv->vp);
424  duration = 0;
425  seg = os->segp;
426  d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
427  if (d < 0) {
429  return 0;
430  } else if (flags & VORBIS_FLAG_COMMENT) {
431  vorbis_update_metadata(s, idx);
432  flags = 0;
433  }
434  duration += d;
435  last_pkt = next_pkt = next_pkt + os->psize;
436  for (; seg < os->nsegs; seg++) {
437  if (os->segments[seg] < 255) {
438  int d = av_vorbis_parse_frame_flags(priv->vp, last_pkt, 1, &flags);
439  if (d < 0) {
440  duration = os->granule;
441  break;
442  } else if (flags & VORBIS_FLAG_COMMENT) {
443  vorbis_update_metadata(s, idx);
444  flags = 0;
445  }
446  duration += d;
447  last_pkt = next_pkt + os->segments[seg];
448  }
449  next_pkt += os->segments[seg];
450  }
451  os->lastpts =
452  os->lastdts = os->granule - duration;
453 
454  if (!os->granule && duration) //hack to deal with broken files (Ticket3710)
455  os->lastpts = os->lastdts = AV_NOPTS_VALUE;
456 
457  if (s->streams[idx]->start_time == AV_NOPTS_VALUE) {
458  s->streams[idx]->start_time = FFMAX(os->lastpts, 0);
459  if (s->streams[idx]->duration != AV_NOPTS_VALUE)
460  s->streams[idx]->duration -= s->streams[idx]->start_time;
461  }
462  priv->final_pts = AV_NOPTS_VALUE;
463  av_vorbis_parse_reset(priv->vp);
464  }
465 
466  /* parse packet duration */
467  if (os->psize > 0) {
468  duration = av_vorbis_parse_frame_flags(priv->vp, os->buf + os->pstart, 1, &flags);
469  if (duration < 0) {
471  return 0;
472  } else if (flags & VORBIS_FLAG_COMMENT) {
473  vorbis_update_metadata(s, idx);
474  flags = 0;
475  }
476  os->pduration = duration;
477  }
478 
479  /* final packet handling
480  * here we save the pts of the first packet in the final page, sum up all
481  * packet durations in the final page except for the last one, and compare
482  * to the page granule to find the duration of the final packet */
483  if (os->flags & OGG_FLAG_EOS) {
484  if (os->lastpts != AV_NOPTS_VALUE) {
485  priv->final_pts = os->lastpts;
486  priv->final_duration = 0;
487  }
488  if (os->segp == os->nsegs)
489  os->pduration = os->granule - priv->final_pts - priv->final_duration;
490  priv->final_duration += os->pduration;
491  }
492 
493  return 0;
494 }
495 
496 const struct ogg_codec ff_vorbis_codec = {
497  .magic = "\001vorbis",
498  .magicsize = 7,
499  .header = vorbis_header,
500  .packet = vorbis_packet,
501  .cleanup = vorbis_cleanup,
502  .nb_header = 3,
503 };
unsigned int nb_chapters
Number of chapters in AVChapter array.
Definition: avformat.h:1530
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:771
const char * s
Definition: avisynth_c.h:768
#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:997
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:145
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:4504
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:996
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3953
AVVorbisParseContext * av_vorbis_parse_init(const uint8_t *extradata, int extradata_size)
Allocate and initialize the Vorbis parser using headers in the extradata.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
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:1288
unsigned char * packet[3]
int64_t lastpts
Definition: oggdec.h:72
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that'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:4261
Format I/O context.
Definition: avformat.h:1327
unsigned int psize
Definition: oggdec.h:66
Public dictionary API.
uint8_t
#define av_malloc(s)
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int id
unique ID to identify the chapter
Definition: avformat.h:1285
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1395
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:101
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:3982
const AVMetadataConv ff_vorbiscomment_metadata_conv[]
VorbisComment metadata conversion mapping.
Definition: vorbiscomment.c:33
#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:251
#define AVERROR(e)
Definition: error.h:43
#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:3949
AVChapter ** chapters
Definition: avformat.h:1531
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#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:3971
unsigned int new_metadata_size
Definition: oggdec.h:89
uint64_t granule
Definition: oggdec.h:70
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that'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 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:28
static int vorbis_update_metadata(AVFormatContext *s, int idx)
int n
Definition: avisynth_c.h:684
AVDictionary * metadata
Definition: avformat.h:947
#define VORBIS_FLAG_COMMENT
Definition: vorbis_parser.h:48
Stream structure.
Definition: avformat.h:878
#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:187
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:455
void * buf
Definition: avisynth_c.h:690
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:3680
static av_const int av_toupper(int c)
Locale-independent conversion of ASCII characters to uppercase.
Definition: avstring.h:231
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
static int flags
Definition: cpu.c:47
const int8_t * magic
Definition: oggdec.h:32
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:932
int sample_rate
Audio only.
Definition: avcodec.h:4063
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:925
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:1623
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:733
#define av_free(p)
Definition: oggdec.h:101
int len
void * priv_data
Format private data.
Definition: avformat.h:1355
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:3967
int channels
Audio only.
Definition: avcodec.h:4059
#define av_freep(p)
AVCodecParameters * codecpar
Definition: avformat.h:1230
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242
void av_vorbis_parse_reset(AVVorbisParseContext *s)
#define AV_WL32(p, v)
Definition: intreadwrite.h:426