FFmpeg
aiffdec.c
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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 "demux.h"
26 #include "internal.h"
27 #include "pcm.h"
28 #include "aiff.h"
29 #include "id3v2.h"
30 #include "mov_chan.h"
31 #include "replaygain.h"
32 
33 #define AIFF 0
34 #define AIFF_C_VERSION1 0xA2805140
35 
36 typedef struct AIFFInputContext {
37  int64_t data_end;
40 
42 {
43  if (bps <= 8)
44  return AV_CODEC_ID_PCM_S8;
45  if (bps <= 16)
46  return AV_CODEC_ID_PCM_S16BE;
47  if (bps <= 24)
48  return AV_CODEC_ID_PCM_S24BE;
49  if (bps <= 32)
50  return AV_CODEC_ID_PCM_S32BE;
51 
52  /* bigger than 32 isn't allowed */
53  return AV_CODEC_ID_NONE;
54 }
55 
56 /* returns the size of the found tag */
57 static int64_t get_tag(AVIOContext *pb, uint32_t * tag)
58 {
59  int64_t size;
60 
61  if (avio_feof(pb))
62  return AVERROR(EIO);
63 
64  *tag = avio_rl32(pb);
65  size = avio_rb32(pb);
66 
67  return size;
68 }
69 
70 /* Metadata string read */
71 static void get_meta(AVFormatContext *s, const char *key, int64_t size)
72 {
73  uint8_t *str = NULL;
74 
75  if (size < SIZE_MAX)
76  str = av_malloc(size+1);
77 
78  if (str) {
79  int res = avio_read(s->pb, str, size);
80  if (res < 0){
81  av_free(str);
82  return;
83  }
84  size -= res;
85  str[res] = 0;
86  av_dict_set(&s->metadata, key, str, AV_DICT_DONT_STRDUP_VAL);
87  }
88 
89  avio_skip(s->pb, size);
90 }
91 
92 /* Returns the number of sound data frames or negative on error */
93 static int get_aiff_header(AVFormatContext *s, int64_t size,
94  unsigned version)
95 {
96  AVIOContext *pb = s->pb;
97  AVCodecParameters *par = s->streams[0]->codecpar;
98  AIFFInputContext *aiff = s->priv_data;
99  int exp;
100  uint64_t val;
101  int sample_rate;
102  unsigned int num_frames;
103  int channels;
104 
105  if (size & 1)
106  size++;
108  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  if (sample_rate <= 0)
124  return AVERROR_INVALIDDATA;
125 
126  par->sample_rate = sample_rate;
127  if (size < 18)
128  return AVERROR_INVALIDDATA;
129  size -= 18;
130 
131  /* get codec id for AIFF-C */
132  if (size < 4) {
133  version = AIFF;
134  } else if (version == AIFF_C_VERSION1) {
135  par->codec_tag = avio_rl32(pb);
137  if (par->codec_id == AV_CODEC_ID_NONE)
138  avpriv_request_sample(s, "unknown or unsupported codec tag: %s",
139  av_fourcc2str(par->codec_tag));
140  size -= 4;
141  }
142 
146  aiff->block_duration = 1;
147  } else {
148  switch (par->codec_id) {
154  aiff->block_duration = 1;
155  break;
157  par->block_align = 34 * channels;
158  break;
159  case AV_CODEC_ID_MACE3:
160  par->block_align = 2 * channels;
161  break;
163  par->bits_per_coded_sample = 5;
166  case AV_CODEC_ID_MACE6:
169  par->block_align = 1 * channels;
170  break;
171  case AV_CODEC_ID_GSM:
172  par->block_align = 33;
173  break;
174  default:
175  aiff->block_duration = 1;
176  break;
177  }
178  if (par->block_align > 0)
180  par->block_align);
181  }
182 
183  /* Block align needs to be computed in all cases, as the definition
184  * is specific to applications -> here we use the WAVE format definition */
185  if (!par->block_align)
186  par->block_align = (av_get_bits_per_sample(par->codec_id) * channels) >> 3;
187 
188  if (aiff->block_duration) {
189  par->bit_rate = av_rescale(par->sample_rate, par->block_align * 8LL,
190  aiff->block_duration);
191  if (par->bit_rate < 0)
192  par->bit_rate = 0;
193  }
194 
195  /* Chunk is over */
196  if (size)
197  avio_skip(pb, size);
198 
199  return num_frames;
200 }
201 
202 static int aiff_probe(const AVProbeData *p)
203 {
204  /* check file header */
205  if (AV_RL32(p->buf) == MKTAG('F', 'O', 'R', 'M') &&
206  AV_RB32(p->buf + 4) >= 4 &&
207  p->buf[8] == 'A' && p->buf[9] == 'I' &&
208  p->buf[10] == 'F' && (p->buf[11] == 'F' || p->buf[11] == 'C'))
209  return AVPROBE_SCORE_MAX;
210  else
211  return 0;
212 }
213 
214 /* aiff input */
216 {
217  int ret;
218  int64_t filesize, size;
219  int64_t offset = 0, position;
220  uint32_t tag;
221  unsigned version = AIFF_C_VERSION1;
222  AVIOContext *pb = s->pb;
223  AVStream * st;
224  AIFFInputContext *aiff = s->priv_data;
225  ID3v2ExtraMeta *id3v2_extra_meta;
226 
227  /* check FORM header */
228  filesize = get_tag(pb, &tag);
229  if (filesize < 4 || tag != MKTAG('F', 'O', 'R', 'M'))
230  return AVERROR_INVALIDDATA;
231 
232  /* AIFF data type */
233  tag = avio_rl32(pb);
234  if (tag == MKTAG('A', 'I', 'F', 'F')) /* Got an AIFF file */
235  version = AIFF;
236  else if (tag != MKTAG('A', 'I', 'F', 'C')) /* An AIFF-C file then */
237  return AVERROR_INVALIDDATA;
238 
239  filesize -= 4;
240 
241  st = avformat_new_stream(s, NULL);
242  if (!st)
243  return AVERROR(ENOMEM);
244 
245  while (filesize > 0) {
246  /* parse different chunks */
247  size = get_tag(pb, &tag);
248 
249  if (size == AVERROR_EOF && offset > 0 && st->codecpar->block_align) {
250  av_log(s, AV_LOG_WARNING, "header parser hit EOF\n");
251  goto got_sound;
252  }
253  if (size < 0)
254  return size;
255 
256  filesize -= size + 8;
257 
258  switch (tag) {
259  case MKTAG('C', 'O', 'M', 'M'): /* Common chunk */
260  /* Then for the complete header info */
262  if (st->nb_frames < 0)
263  return st->nb_frames;
264  if (offset > 0) // COMM is after SSND
265  goto got_sound;
266  break;
267  case MKTAG('I', 'D', '3', ' '):
268  position = avio_tell(pb);
269  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
270  if (id3v2_extra_meta)
271  if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0 ||
272  (ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0) {
273  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
274  return ret;
275  }
276  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
277  if (position + size > avio_tell(pb))
278  avio_skip(pb, position + size - avio_tell(pb));
279  break;
280  case MKTAG('F', 'V', 'E', 'R'): /* Version chunk */
281  version = avio_rb32(pb);
282  break;
283  case MKTAG('N', 'A', 'M', 'E'): /* Sample name chunk */
284  get_meta(s, "title" , size);
285  break;
286  case MKTAG('A', 'U', 'T', 'H'): /* Author chunk */
287  get_meta(s, "author" , size);
288  break;
289  case MKTAG('(', 'c', ')', ' '): /* Copyright chunk */
290  get_meta(s, "copyright", size);
291  break;
292  case MKTAG('A', 'N', 'N', 'O'): /* Annotation chunk */
293  get_meta(s, "comment" , size);
294  break;
295  case MKTAG('S', 'S', 'N', 'D'): /* Sampled sound chunk */
296  if (size < 8)
297  return AVERROR_INVALIDDATA;
298  aiff->data_end = avio_tell(pb) + size;
299  offset = avio_rb32(pb); /* Offset of sound data */
300  avio_rb32(pb); /* BlockSize... don't care */
301  offset += avio_tell(pb); /* Compute absolute data offset */
302  if (st->codecpar->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) /* Assume COMM already parsed */
303  goto got_sound;
304  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
305  av_log(s, AV_LOG_ERROR, "file is not seekable\n");
306  return -1;
307  }
308  avio_skip(pb, size - 8);
309  break;
310  case MKTAG('w', 'a', 'v', 'e'):
311  if ((uint64_t)size > (1<<30))
312  return AVERROR_INVALIDDATA;
313  if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0)
314  return ret;
316  && size>=12*4 && !st->codecpar->block_align) {
317  st->codecpar->block_align = AV_RB32(st->codecpar->extradata+11*4);
318  aiff->block_duration = AV_RB32(st->codecpar->extradata+9*4);
319  } else if (st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
320  char rate = 0;
321  if (size >= 25)
322  rate = st->codecpar->extradata[24];
323  switch (rate) {
324  case 'H': // RATE_HALF
325  st->codecpar->block_align = 17;
326  break;
327  case 'F': // RATE_FULL
328  default:
329  st->codecpar->block_align = 35;
330  }
331  aiff->block_duration = 160;
332  st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate * (st->codecpar->block_align << 3) /
333  aiff->block_duration;
334  }
335  break;
336  case MKTAG('C','H','A','N'):
337  if ((ret = ff_mov_read_chan(s, pb, st, size)) < 0)
338  return ret;
339  break;
340  case MKTAG('A','P','C','M'): /* XA ADPCM compressed sound chunk */
342  aiff->data_end = avio_tell(pb) + size;
343  offset = avio_tell(pb) + 8;
344  /* This field is unknown and its data seems to be irrelevant */
345  avio_rb32(pb);
346  st->codecpar->block_align = avio_rb32(pb);
347 
348  goto got_sound;
349  break;
350  case 0:
351  if (offset > 0 && st->codecpar->block_align) // COMM && SSND
352  goto got_sound;
353  default: /* Jump */
354  avio_skip(pb, size);
355  }
356 
357  /* Skip required padding byte for odd-sized chunks. */
358  if (size & 1) {
359  filesize--;
360  avio_skip(pb, 1);
361  }
362  }
363 
364  ret = ff_replaygain_export(st, s->metadata);
365  if (ret < 0)
366  return ret;
367 
368 got_sound:
369  if (!st->codecpar->block_align && st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
370  av_log(s, AV_LOG_WARNING, "qcelp without wave chunk, assuming full rate\n");
371  st->codecpar->block_align = 35;
372  } else if (st->codecpar->block_align <= 0) {
373  av_log(s, AV_LOG_ERROR, "could not find COMM tag or invalid block_align value\n");
374  return AVERROR_INVALIDDATA;
375  }
376  if (aiff->block_duration < 0)
377  return AVERROR_INVALIDDATA;
378 
379  /* Now positioned, get the sound data start and end */
380  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
381  st->start_time = 0;
382  st->duration = st->nb_frames * aiff->block_duration;
383 
384  /* Position the stream at the first block */
385  avio_seek(pb, offset, SEEK_SET);
386 
387  return 0;
388 }
389 
390 #define MAX_SIZE 4096
391 
393  AVPacket *pkt)
394 {
395  AVStream *st = s->streams[0];
396  AIFFInputContext *aiff = s->priv_data;
397  int64_t max_size;
398  int res, size;
399 
400  /* calculate size of remaining data */
401  max_size = aiff->data_end - avio_tell(s->pb);
402  if (max_size <= 0)
403  return AVERROR_EOF;
404 
405  if (!st->codecpar->block_align) {
406  av_log(s, AV_LOG_ERROR, "block_align not set\n");
407  return AVERROR_INVALIDDATA;
408  }
409 
410  /* Now for that packet */
411  switch (st->codecpar->codec_id) {
413  case AV_CODEC_ID_GSM:
414  case AV_CODEC_ID_QDM2:
415  case AV_CODEC_ID_QCELP:
416  size = st->codecpar->block_align;
417  break;
418  default:
420  if (!size)
421  return AVERROR_INVALIDDATA;
422  }
423  size = FFMIN(max_size, size);
424  res = av_get_packet(s->pb, pkt, size);
425  if (res < 0)
426  return res;
427 
428  if (size >= st->codecpar->block_align)
430  /* Only one stream in an AIFF file */
431  pkt->stream_index = 0;
432  pkt->duration = (res / st->codecpar->block_align) * (int64_t) aiff->block_duration;
433  return 0;
434 }
435 
437  .p.name = "aiff",
438  .p.long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
439  .p.codec_tag = ff_aiff_codec_tags_list,
440  .priv_data_size = sizeof(AIFFInputContext),
445 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:328
AV_CODEC_ID_MACE6
@ AV_CODEC_ID_MACE6
Definition: codec_id.h:450
AIFFInputContext::data_end
int64_t data_end
Definition: aiffdec.c:37
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:348
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
AV_CODEC_ID_ADPCM_IMA_QT
@ AV_CODEC_ID_ADPCM_IMA_QT
Definition: codec_id.h:367
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
pcm.h
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
MAX_SIZE
#define MAX_SIZE
Definition: aiffdec.c:390
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:47
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
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:94
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:392
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:1139
AV_CODEC_ID_ADPCM_G722
@ AV_CODEC_ID_ADPCM_G722
Definition: codec_id.h:395
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:540
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:313
sample_rate
sample_rate
Definition: ffmpeg_filter.c:409
AIFFInputContext
Definition: aiffdec.c:36
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
ff_get_extradata
int ff_get_extradata(void *logctx, 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: demux_utils.c:335
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
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: avformat.c:853
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:329
AIFF_C_VERSION1
#define AIFF_C_VERSION1
Definition: aiffdec.c:34
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:151
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:494
val
static double val(void *priv, double ch)
Definition: aeval.c:78
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:802
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:1192
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:79
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:547
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:332
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:760
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:449
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:578
ID3v2ExtraMeta
Definition: id3v2.h:84
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:41
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:198
ff_aiff_demuxer
const FFInputFormat ff_aiff_demuxer
Definition: aiffdec.c:436
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:553
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
channels
channels
Definition: aptx.h:31
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:334
key
const char * key
Definition: hwcontext_opencl.c:189
aiff_probe
static int aiff_probe(const AVProbeData *p)
Definition: aiffdec.c:202
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:335
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
get_tag
static int64_t get_tag(AVIOContext *pb, uint32_t *tag)
Definition: aiffdec.c:57
NULL
#define NULL
Definition: coverity.c:32
get_aiff_header
static int get_aiff_header(AVFormatContext *s, int64_t size, unsigned version)
Definition: aiffdec.c:93
AV_CODEC_ID_ADPCM_IMA_WS
@ AV_CODEC_ID_ADPCM_IMA_WS
Definition: codec_id.h:371
aiff.h
AIFFInputContext::block_duration
int block_duration
Definition: aiffdec.c:38
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:1161
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:907
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
AV_CODEC_ID_QDM2
@ AV_CODEC_ID_QDM2
Definition: codec_id.h:459
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
exp
int8_t exp
Definition: eval.c:74
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
AV_CODEC_ID_ADPCM_XA
@ AV_CODEC_ID_ADPCM_XA
Definition: codec_id.h:375
AV_CODEC_ID_GSM
@ AV_CODEC_ID_GSM
as in Berlin toast format
Definition: codec_id.h:458
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:804
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
AV_CODEC_ID_QCELP
@ AV_CODEC_ID_QCELP
Definition: codec_id.h:464
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:729
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
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:106
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:145
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
bps
unsigned bps
Definition: movenc.c:1787
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:490
aiff_codec_get_id
static enum AVCodecID aiff_codec_get_id(int bps)
Definition: aiffdec.c:41
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
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:796
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:41
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:528
version
version
Definition: libkvazaar.c:321
filesize
static int64_t filesize(AVIOContext *pb)
Definition: ffmpeg_mux.c:51
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
AIFF
#define AIFF
Definition: aiffdec.c:33
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:191
AV_CODEC_ID_PCM_F64BE
@ AV_CODEC_ID_PCM_F64BE
Definition: codec_id.h:350
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:337
demux.h
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
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:103
get_meta
static void get_meta(AVFormatContext *s, const char *key, int64_t size)
Definition: aiffdec.c:71
mov_chan.h
tag
uint32_t tag
Definition: movenc.c:1786
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
ff_pcm_read_seek
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:73
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:745
avformat.h
dict.h
AV_CODEC_ID_CBD2_DPCM
@ AV_CODEC_ID_CBD2_DPCM
Definition: codec_id.h:437
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
AV_CODEC_ID_ADPCM_G726LE
@ AV_CODEC_ID_ADPCM_G726LE
Definition: codec_id.h:402
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:611
AVPacket::stream_index
int stream_index
Definition: packet.h:524
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:317
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:110
AV_CODEC_ID_SDX2_DPCM
@ AV_CODEC_ID_SDX2_DPCM
Definition: codec_id.h:433
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
ff_aiff_codec_tags_list
const AVCodecTag *const ff_aiff_codec_tags_list[]
Definition: aiff.c:55
AVPacket
This structure stores compressed data.
Definition: packet.h:499
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:88
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:1145
FFInputFormat
Definition: demux.h:37
replaygain.h
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:97
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
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:792
AV_CODEC_ID_PCM_S24BE
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:341
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:345
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:443
aiff_read_header
static int aiff_read_header(AVFormatContext *s)
Definition: aiffdec.c:215
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:345