FFmpeg
aiffdec.c
Go to the documentation of this file.
1 /*
2  * AIFF/AIFF-C demuxer
3  * Copyright (c) 2006 Patrick Guimond
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "avformat.h"
25 #include "internal.h"
26 #include "pcm.h"
27 #include "aiff.h"
28 #include "id3v2.h"
29 #include "mov_chan.h"
30 #include "replaygain.h"
31 
32 #define AIFF 0
33 #define AIFF_C_VERSION1 0xA2805140
34 
35 typedef struct AIFFInputContext {
36  int64_t data_end;
39 
41 {
42  if (bps <= 8)
43  return AV_CODEC_ID_PCM_S8;
44  if (bps <= 16)
45  return AV_CODEC_ID_PCM_S16BE;
46  if (bps <= 24)
47  return AV_CODEC_ID_PCM_S24BE;
48  if (bps <= 32)
49  return AV_CODEC_ID_PCM_S32BE;
50 
51  /* bigger than 32 isn't allowed */
52  return AV_CODEC_ID_NONE;
53 }
54 
55 /* returns the size of the found tag */
56 static int get_tag(AVIOContext *pb, uint32_t * tag)
57 {
58  int size;
59 
60  if (avio_feof(pb))
61  return AVERROR(EIO);
62 
63  *tag = avio_rl32(pb);
64  size = avio_rb32(pb);
65 
66  if (size < 0)
67  size = 0x7fffffff;
68 
69  return size;
70 }
71 
72 /* Metadata string read */
73 static void get_meta(AVFormatContext *s, const char *key, int size)
74 {
75  uint8_t *str = av_malloc(size+1);
76 
77  if (str) {
78  int res = avio_read(s->pb, str, size);
79  if (res < 0){
80  av_free(str);
81  return;
82  }
83  size -= res;
84  str[res] = 0;
86  }
87 
88  avio_skip(s->pb, size);
89 }
90 
91 /* Returns the number of sound data frames or negative on error */
93  unsigned version)
94 {
95  AVIOContext *pb = s->pb;
96  AVCodecParameters *par = s->streams[0]->codecpar;
97  AIFFInputContext *aiff = s->priv_data;
98  int exp;
99  uint64_t val;
100  int sample_rate;
101  unsigned int num_frames;
102 
103  if (size == INT_MAX)
104  return AVERROR_INVALIDDATA;
105 
106  if (size & 1)
107  size++;
109  par->channels = avio_rb16(pb);
110  num_frames = avio_rb32(pb);
111  par->bits_per_coded_sample = avio_rb16(pb);
112 
113  exp = avio_rb16(pb) - 16383 - 63;
114  val = avio_rb64(pb);
115  if (exp <-63 || exp >63) {
116  av_log(s, AV_LOG_ERROR, "exp %d is out of range\n", exp);
117  return AVERROR_INVALIDDATA;
118  }
119  if (exp >= 0)
120  sample_rate = val << exp;
121  else
122  sample_rate = (val + (1ULL<<(-exp-1))) >> -exp;
123  par->sample_rate = sample_rate;
124  if (size < 18)
125  return AVERROR_INVALIDDATA;
126  size -= 18;
127 
128  /* get codec id for AIFF-C */
129  if (size < 4) {
130  version = AIFF;
131  } else if (version == AIFF_C_VERSION1) {
132  par->codec_tag = avio_rl32(pb);
134  if (par->codec_id == AV_CODEC_ID_NONE)
135  avpriv_request_sample(s, "unknown or unsupported codec tag: %s",
136  av_fourcc2str(par->codec_tag));
137  size -= 4;
138  }
139 
143  aiff->block_duration = 1;
144  } else {
145  switch (par->codec_id) {
151  aiff->block_duration = 1;
152  break;
154  par->block_align = 34 * par->channels;
155  break;
156  case AV_CODEC_ID_MACE3:
157  par->block_align = 2 * par->channels;
158  break;
160  par->bits_per_coded_sample = 5;
163  case AV_CODEC_ID_MACE6:
165  par->block_align = 1 * par->channels;
166  break;
167  case AV_CODEC_ID_GSM:
168  par->block_align = 33;
169  break;
170  default:
171  aiff->block_duration = 1;
172  break;
173  }
174  if (par->block_align > 0)
176  par->block_align);
177  }
178 
179  /* Block align needs to be computed in all cases, as the definition
180  * is specific to applications -> here we use the WAVE format definition */
181  if (!par->block_align)
182  par->block_align = (av_get_bits_per_sample(par->codec_id) * par->channels) >> 3;
183 
184  if (aiff->block_duration) {
185  par->bit_rate = (int64_t)par->sample_rate * (par->block_align << 3) /
186  aiff->block_duration;
187  }
188 
189  /* Chunk is over */
190  if (size)
191  avio_skip(pb, size);
192 
193  return num_frames;
194 }
195 
196 static int aiff_probe(const AVProbeData *p)
197 {
198  /* check file header */
199  if (p->buf[0] == 'F' && p->buf[1] == 'O' &&
200  p->buf[2] == 'R' && p->buf[3] == 'M' &&
201  p->buf[8] == 'A' && p->buf[9] == 'I' &&
202  p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
203  return AVPROBE_SCORE_MAX;
204  else
205  return 0;
206 }
207 
208 /* aiff input */
210 {
211  int ret, size, filesize;
212  int64_t offset = 0, position;
213  uint32_t tag;
214  unsigned version = AIFF_C_VERSION1;
215  AVIOContext *pb = s->pb;
216  AVStream * st;
217  AIFFInputContext *aiff = s->priv_data;
218  ID3v2ExtraMeta *id3v2_extra_meta;
219 
220  /* check FORM header */
221  filesize = get_tag(pb, &tag);
222  if (filesize < 0 || tag != MKTAG('F', 'O', 'R', 'M'))
223  return AVERROR_INVALIDDATA;
224 
225  /* AIFF data type */
226  tag = avio_rl32(pb);
227  if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
228  version = AIFF;
229  else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
230  return AVERROR_INVALIDDATA;
231 
232  filesize -= 4;
233 
234  st = avformat_new_stream(s, NULL);
235  if (!st)
236  return AVERROR(ENOMEM);
237 
238  while (filesize > 0) {
239  /* parse different chunks */
240  size = get_tag(pb, &tag);
241 
242  if (size == AVERROR_EOF && offset > 0 && st->codecpar->block_align) {
243  av_log(s, AV_LOG_WARNING, "header parser hit EOF\n");
244  goto got_sound;
245  }
246  if (size < 0)
247  return size;
248 
249  if (size >= 0x7fffffff - 8)
250  filesize = 0;
251  else
252  filesize -= size + 8;
253 
254  switch (tag) {
255  case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
256  /* Then for the complete header info */
258  if (st->nb_frames < 0)
259  return st->nb_frames;
260  if (offset > 0) // COMM is after SSND
261  goto got_sound;
262  break;
263  case MKTAG('I', 'D', '3', ' '):
264  position = avio_tell(pb);
265  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
266  if (id3v2_extra_meta)
267  if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0 ||
268  (ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0) {
269  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
270  return ret;
271  }
272  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
273  if (position + size > avio_tell(pb))
274  avio_skip(pb, position + size - avio_tell(pb));
275  break;
276  case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
277  version = avio_rb32(pb);
278  break;
279  case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
280  get_meta(s, "title" , size);
281  break;
282  case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
283  get_meta(s, "author" , size);
284  break;
285  case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
286  get_meta(s, "copyright", size);
287  break;
288  case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
289  get_meta(s, "comment" , size);
290  break;
291  case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
292  if (size < 8)
293  return AVERROR_INVALIDDATA;
294  aiff->data_end = avio_tell(pb) + size;
295  offset = avio_rb32(pb); /* Offset of sound data */
296  avio_rb32(pb); /* BlockSize... don't care */
297  offset += avio_tell(pb); /* Compute absolute data offset */
298  if (st->codecpar->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) /* Assume COMM already parsed */
299  goto got_sound;
300  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
301  av_log(s, AV_LOG_ERROR, "file is not seekable\n");
302  return -1;
303  }
304  avio_skip(pb, size - 8);
305  break;
306  case MKTAG('w', 'a', 'v', 'e'):
307  if ((uint64_t)size > (1<<30))
308  return -1;
309  if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0)
310  return ret;
312  && size>=12*4 && !st->codecpar->block_align) {
313  st->codecpar->block_align = AV_RB32(st->codecpar->extradata+11*4);
314  aiff->block_duration = AV_RB32(st->codecpar->extradata+9*4);
315  } else if (st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
316  char rate = 0;
317  if (size >= 25)
318  rate = st->codecpar->extradata[24];
319  switch (rate) {
320  case 'H': // RATE_HALF
321  st->codecpar->block_align = 17;
322  break;
323  case 'F': // RATE_FULL
324  default:
325  st->codecpar->block_align = 35;
326  }
327  aiff->block_duration = 160;
328  st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate * (st->codecpar->block_align << 3) /
329  aiff->block_duration;
330  }
331  break;
332  case MKTAG('C','H','A','N'):
333  if ((ret = ff_mov_read_chan(s, pb, st, size)) < 0)
334  return ret;
335  break;
336  case MKTAG('A','P','C','M'): /* XA ADPCM compressed sound chunk */
338  aiff->data_end = avio_tell(pb) + size;
339  offset = avio_tell(pb) + 8;
340  /* This field is unknown and its data seems to be irrelevant */
341  avio_rb32(pb);
342  st->codecpar->block_align = avio_rb32(pb);
343 
344  goto got_sound;
345  break;
346  case 0:
347  if (offset > 0 && st->codecpar->block_align) // COMM && SSND
348  goto got_sound;
349  default: /* Jump */
350  avio_skip(pb, size);
351  }
352 
353  /* Skip required padding byte for odd-sized chunks. */
354  if (size & 1) {
355  filesize--;
356  avio_skip(pb, 1);
357  }
358  }
359 
360  ret = ff_replaygain_export(st, s->metadata);
361  if (ret < 0)
362  return ret;
363 
364 got_sound:
365  if (!st->codecpar->block_align && st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
366  av_log(s, AV_LOG_WARNING, "qcelp without wave chunk, assuming full rate\n");
367  st->codecpar->block_align = 35;
368  } else if (!st->codecpar->block_align) {
369  av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
370  return -1;
371  }
372 
373  /* Now positioned, get the sound data start and end */
374  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
375  st->start_time = 0;
376  st->duration = st->nb_frames * aiff->block_duration;
377 
378  /* Position the stream at the first block */
379  avio_seek(pb, offset, SEEK_SET);
380 
381  return 0;
382 }
383 
384 #define MAX_SIZE 4096
385 
387  AVPacket *pkt)
388 {
389  AVStream *st = s->streams[0];
390  AIFFInputContext *aiff = s->priv_data;
391  int64_t max_size;
392  int res, size;
393 
394  /* calculate size of remaining data */
395  max_size = aiff->data_end - avio_tell(s->pb);
396  if (max_size <= 0)
397  return AVERROR_EOF;
398 
399  if (!st->codecpar->block_align) {
400  av_log(s, AV_LOG_ERROR, "block_align not set\n");
401  return AVERROR_INVALIDDATA;
402  }
403 
404  /* Now for that packet */
405  switch (st->codecpar->codec_id) {
407  case AV_CODEC_ID_GSM:
408  case AV_CODEC_ID_QDM2:
409  case AV_CODEC_ID_QCELP:
410  size = st->codecpar->block_align;
411  break;
412  default:
414  if (!size)
415  return AVERROR_INVALIDDATA;
416  }
417  size = FFMIN(max_size, size);
418  res = av_get_packet(s->pb, pkt, size);
419  if (res < 0)
420  return res;
421 
422  if (size >= st->codecpar->block_align)
424  /* Only one stream in an AIFF file */
425  pkt->stream_index = 0;
426  pkt->duration = (res / st->codecpar->block_align) * aiff->block_duration;
427  return 0;
428 }
429 
431  .name = "aiff",
432  .long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
433  .priv_data_size = sizeof(AIFFInputContext),
438  .codec_tag = ff_aiff_codec_tags_list,
439 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:313
AV_CODEC_ID_MACE6
@ AV_CODEC_ID_MACE6
Definition: codec_id.h:432
AIFFInputContext::data_end
int64_t data_end
Definition: aiffdec.c:36
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AV_CODEC_ID_PCM_F32BE
@ AV_CODEC_ID_PCM_F32BE
Definition: codec_id.h:333
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
AV_CODEC_ID_ADPCM_IMA_QT
@ AV_CODEC_ID_ADPCM_IMA_QT
Definition: codec_id.h:352
AVERROR
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:724
pcm.h
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
MAX_SIZE
#define MAX_SIZE
Definition: aiffdec.c:384
ff_get_extradata
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:469
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
ff_replaygain_export
int ff_replaygain_export(AVStream *st, AVDictionary *metadata)
Parse replaygain tags and export them as per-stream side data.
Definition: replaygain.c:90
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
id3v2.h
aiff_read_packet
static int aiff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: aiffdec.c:386
ff_id3v2_read
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1135
AV_CODEC_ID_ADPCM_G722
@ AV_CODEC_ID_ADPCM_G722
Definition: codec_id.h:380
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
AIFFInputContext
Definition: aiffdec.c:35
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
av_get_audio_frame_duration2
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:821
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:314
AIFF_C_VERSION1
#define AIFF_C_VERSION1
Definition: aiffdec.c:33
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:149
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:486
val
static double val(void *priv, double ch)
Definition: aeval.c:76
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:888
ff_id3v2_parse_chapters
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1188
AV_DICT_DONT_STRDUP_VAL
#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:72
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:585
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:317
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:773
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AV_CODEC_ID_MACE3
@ AV_CODEC_ID_MACE3
Definition: codec_id.h:431
AVInputFormat
Definition: avformat.h:626
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:426
ID3v2ExtraMeta
Definition: id3v2.h:84
ff_codec_aiff_tags
const AVCodecTag ff_codec_aiff_tags[]
Definition: aiff.c:26
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:631
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
get_meta
static void get_meta(AVFormatContext *s, const char *key, int size)
Definition: aiffdec.c:73
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:319
key
const char * key
Definition: hwcontext_opencl.c:168
aiff_probe
static int aiff_probe(const AVProbeData *p)
Definition: aiffdec.c:196
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1097
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:320
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:992
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
NULL
#define NULL
Definition: coverity.c:32
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AV_CODEC_ID_ADPCM_IMA_WS
@ AV_CODEC_ID_ADPCM_IMA_WS
Definition: codec_id.h:356
aiff.h
AIFFInputContext::block_duration
int block_duration
Definition: aiffdec.c:37
ff_id3v2_parse_apic
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:1157
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:894
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
AV_CODEC_ID_QDM2
@ AV_CODEC_ID_QDM2
Definition: codec_id.h:441
exp
int8_t exp
Definition: eval.c:72
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
AV_CODEC_ID_ADPCM_XA
@ AV_CODEC_ID_ADPCM_XA
Definition: codec_id.h:360
AV_CODEC_ID_GSM
@ AV_CODEC_ID_GSM
as in Berlin toast format
Definition: codec_id.h:440
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:890
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
AV_CODEC_ID_QCELP
@ AV_CODEC_ID_QCELP
Definition: codec_id.h:446
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:742
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:357
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:262
ff_aiff_demuxer
const AVInputFormat ff_aiff_demuxer
Definition: aiffdec.c:430
bps
unsigned bps
Definition: movenc.c:1598
size
int size
Definition: twinvq_data.h:10344
ID3v2_DEFAULT_MAGIC
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
AV_CODEC_ID_QDMC
@ AV_CODEC_ID_QDMC
Definition: codec_id.h:472
aiff_codec_get_id
static enum AVCodecID aiff_codec_get_id(int bps)
Definition: aiffdec.c:40
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
offset
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
Definition: writing_filters.txt:86
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
version
version
Definition: libkvazaar.c:307
get_tag
static int get_tag(AVIOContext *pb, uint32_t *tag)
Definition: aiffdec.c:56
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
AIFF
#define AIFF
Definition: aiffdec.c:32
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:177
AV_CODEC_ID_PCM_F64BE
@ AV_CODEC_ID_PCM_F64BE
Definition: codec_id.h:335
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:322
av_get_packet
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:196
mov_chan.h
tag
uint32_t tag
Definition: movenc.c:1597
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:845
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:56
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:758
avformat.h
dict.h
AV_CODEC_ID_ADPCM_G726LE
@ AV_CODEC_ID_ADPCM_G726LE
Definition: codec_id.h:387
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1146
AVPacket::stream_index
int stream_index
Definition: packet.h:375
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:333
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
AV_CODEC_ID_SDX2_DPCM
@ AV_CODEC_ID_SDX2_DPCM
Definition: codec_id.h:417
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
ff_aiff_codec_tags_list
const AVCodecTag *const ff_aiff_codec_tags_list[]
Definition: aiff.c:54
AVPacket
This structure stores compressed data.
Definition: packet.h:350
av_dict_set
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
ff_id3v2_free_extra_meta
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1141
convert_header.str
string str
Definition: convert_header.py:20
replaygain.h
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:878
AV_CODEC_ID_PCM_S24BE
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:326
get_aiff_header
static int get_aiff_header(AVFormatContext *s, int size, unsigned version)
Definition: aiffdec.c:92
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
ff_mov_read_chan
int ff_mov_read_chan(AVFormatContext *s, AVIOContext *pb, AVStream *st, int64_t size)
Read 'chan' tag from the input stream.
Definition: mov_chan.c:554
aiff_read_header
static int aiff_read_header(AVFormatContext *s)
Definition: aiffdec.c:209
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:360