FFmpeg  4.3
flacdec.c
Go to the documentation of this file.
1 /*
2  * Raw FLAC demuxer
3  * Copyright (c) 2001 Fabrice Bellard
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 "libavcodec/flac.h"
23 #include "avformat.h"
24 #include "flac_picture.h"
25 #include "internal.h"
26 #include "rawdec.h"
27 #include "oggdec.h"
28 #include "vorbiscomment.h"
29 #include "replaygain.h"
30 
31 #define SEEKPOINT_SIZE 18
32 
33 typedef struct FLACDecContext {
34  AVClass *class;
38 
39 static void reset_index_position(int64_t metadata_head_size, AVStream *st)
40 {
41  /* the real seek index offset should be the size of metadata blocks with the offset in the frame blocks */
42  int i;
43  for(i=0; i<st->nb_index_entries; i++) {
44  st->index_entries[i].pos += metadata_head_size;
45  }
46 }
47 
49 {
50  int ret, metadata_last=0, metadata_type, metadata_size, found_streaminfo=0;
51  uint8_t header[4];
53  FLACDecContext *flac = s->priv_data;
55  if (!st)
56  return AVERROR(ENOMEM);
60  /* the parameters will be extracted from the compressed bitstream */
61 
62  /* if fLaC marker is not found, assume there is no header */
63  if (avio_rl32(s->pb) != MKTAG('f','L','a','C')) {
64  avio_seek(s->pb, -4, SEEK_CUR);
65  return 0;
66  }
67 
68  /* process metadata blocks */
69  while (!avio_feof(s->pb) && !metadata_last) {
70  if (avio_read(s->pb, header, 4) != 4)
72  flac_parse_block_header(header, &metadata_last, &metadata_type,
73  &metadata_size);
74  switch (metadata_type) {
75  /* allocate and read metadata block for supported types */
82  if (!buffer) {
83  return AVERROR(ENOMEM);
84  }
85  if (avio_read(s->pb, buffer, metadata_size) != metadata_size) {
86  RETURN_ERROR(AVERROR(EIO));
87  }
88  break;
89  /* skip metadata block for unsupported types */
90  default:
91  ret = avio_skip(s->pb, metadata_size);
92  if (ret < 0)
93  return ret;
94  }
95 
96  if (metadata_type == FLAC_METADATA_TYPE_STREAMINFO) {
97  uint32_t samplerate;
98  uint64_t samples;
99 
100  /* STREAMINFO can only occur once */
101  if (found_streaminfo) {
103  }
104  if (metadata_size != FLAC_STREAMINFO_SIZE) {
106  }
107  found_streaminfo = 1;
108  st->codecpar->extradata = buffer;
109  st->codecpar->extradata_size = metadata_size;
110  buffer = NULL;
111 
112  /* get sample rate and sample count from STREAMINFO header;
113  * other parameters will be extracted by the parser */
114  samplerate = AV_RB24(st->codecpar->extradata + 10) >> 4;
115  samples = (AV_RB64(st->codecpar->extradata + 13) >> 24) & ((1ULL << 36) - 1);
116 
117  /* set time base and duration */
118  if (samplerate > 0) {
119  avpriv_set_pts_info(st, 64, 1, samplerate);
120  if (samples > 0)
121  st->duration = samples;
122  }
123  } else if (metadata_type == FLAC_METADATA_TYPE_CUESHEET) {
124  uint8_t isrc[13];
125  uint64_t start;
126  const uint8_t *offset;
127  int i, chapters, track, ti;
128  if (metadata_size < 431)
130  offset = buffer + 395;
131  chapters = bytestream_get_byte(&offset) - 1;
132  if (chapters <= 0)
134  for (i = 0; i < chapters; i++) {
135  if (offset + 36 - buffer > metadata_size)
137  start = bytestream_get_be64(&offset);
138  track = bytestream_get_byte(&offset);
139  bytestream_get_buffer(&offset, isrc, 12);
140  isrc[12] = 0;
141  offset += 14;
142  ti = bytestream_get_byte(&offset);
143  if (ti <= 0) RETURN_ERROR(AVERROR_INVALIDDATA);
144  offset += ti * 12;
145  avpriv_new_chapter(s, track, st->time_base, start, AV_NOPTS_VALUE, isrc);
146  }
147  av_freep(&buffer);
148  } else if (metadata_type == FLAC_METADATA_TYPE_PICTURE) {
149  ret = ff_flac_parse_picture(s, buffer, metadata_size, 1);
150  av_freep(&buffer);
151  if (ret < 0) {
152  av_log(s, AV_LOG_ERROR, "Error parsing attached picture.\n");
153  return ret;
154  }
155  } else if (metadata_type == FLAC_METADATA_TYPE_SEEKTABLE) {
156  const uint8_t *seekpoint = buffer;
157  int i, seek_point_count = metadata_size/SEEKPOINT_SIZE;
158  flac->found_seektable = 1;
159  if ((s->flags&AVFMT_FLAG_FAST_SEEK)) {
160  for(i=0; i<seek_point_count; i++) {
161  int64_t timestamp = bytestream_get_be64(&seekpoint);
162  int64_t pos = bytestream_get_be64(&seekpoint);
163  /* skip number of samples */
164  bytestream_get_be16(&seekpoint);
165  av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
166  }
167  }
168  av_freep(&buffer);
169  }
170  else {
171 
172  /* STREAMINFO must be the first block */
173  if (!found_streaminfo) {
175  }
176  /* process supported blocks other than STREAMINFO */
177  if (metadata_type == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
178  AVDictionaryEntry *chmask;
179 
180  ret = ff_vorbis_comment(s, &s->metadata, buffer, metadata_size, 1);
181  if (ret < 0) {
182  av_log(s, AV_LOG_WARNING, "error parsing VorbisComment metadata\n");
183  } else if (ret > 0) {
184  s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
185  }
186 
187  /* parse the channels mask if present */
188  chmask = av_dict_get(s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
189  if (chmask) {
190  uint64_t mask = strtol(chmask->value, NULL, 0);
191  if (!mask || mask & ~0x3ffffULL) {
193  "Invalid value of WAVEFORMATEXTENSIBLE_CHANNEL_MASK\n");
194  } else {
196  av_dict_set(&s->metadata, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", NULL, 0);
197  }
198  }
199  }
200  av_freep(&buffer);
201  }
202  }
203 
204  ret = ff_replaygain_export(st, s->metadata);
205  if (ret < 0)
206  return ret;
207 
208  reset_index_position(avio_tell(s->pb), st);
209  return 0;
210 
211 fail:
212  av_free(buffer);
213  return ret;
214 }
215 
216 static int raw_flac_probe(const AVProbeData *p)
217 {
218  if ((p->buf[2] & 0xF0) == 0) // blocksize code invalid
219  return 0;
220  if ((p->buf[2] & 0x0F) == 0x0F) // sample rate code invalid
221  return 0;
222  if ((p->buf[3] & 0xF0) >= FLAC_MAX_CHANNELS + FLAC_CHMODE_MID_SIDE << 4)
223  // channel mode invalid
224  return 0;
225  if ((p->buf[3] & 0x06) == 0x06) // bits per sample code invalid
226  return 0;
227  if ((p->buf[3] & 0x01) == 0x01) // reserved bit set
228  return 0;
229  return AVPROBE_SCORE_EXTENSION / 4 + 1;
230 }
231 
232 static int flac_probe(const AVProbeData *p)
233 {
234  if ((AV_RB16(p->buf) & 0xFFFE) == 0xFFF8)
235  return raw_flac_probe(p);
236 
237  /* file header + metadata header + checked bytes of streaminfo */
238  if (p->buf_size >= 4 + 4 + 13) {
239  int type = p->buf[4] & 0x7f;
240  int size = AV_RB24(p->buf + 5);
241  int min_block_size = AV_RB16(p->buf + 8);
242  int max_block_size = AV_RB16(p->buf + 10);
243  int sample_rate = AV_RB24(p->buf + 18) >> 4;
244 
245  if (memcmp(p->buf, "fLaC", 4))
246  return 0;
249  min_block_size >= 16 &&
250  max_block_size >= min_block_size &&
251  sample_rate && sample_rate <= 655350)
252  return AVPROBE_SCORE_MAX;
254  }
255 
256  return 0;
257 }
258 
259 static av_unused int64_t flac_read_timestamp(AVFormatContext *s, int stream_index,
260  int64_t *ppos, int64_t pos_limit)
261 {
262  AVPacket pkt;
263  AVStream *st = s->streams[stream_index];
264  AVCodecParserContext *parser;
265  int ret;
266  int64_t pts = AV_NOPTS_VALUE;
267 
268  if (avio_seek(s->pb, *ppos, SEEK_SET) < 0)
269  return AV_NOPTS_VALUE;
270 
272  parser = av_parser_init(st->codecpar->codec_id);
273  if (!parser){
274  return AV_NOPTS_VALUE;
275  }
276  parser->flags |= PARSER_FLAG_USE_CODEC_TS;
277 
278  for (;;){
279  uint8_t *data;
280  int size;
281 
283  if (ret < 0){
284  if (ret == AVERROR(EAGAIN))
285  continue;
286  else {
288  av_assert1(!pkt.size);
289  }
290  }
291  av_parser_parse2(parser, st->internal->avctx,
292  &data, &size, pkt.data, pkt.size,
293  pkt.pts, pkt.dts, *ppos);
294 
296  if (size) {
297  if (parser->pts != AV_NOPTS_VALUE){
298  // seeking may not have started from beginning of a frame
299  // calculate frame start position from next frame backwards
300  *ppos = parser->next_frame_offset - size;
301  pts = parser->pts;
302  break;
303  }
304  } else if (ret < 0)
305  break;
306  }
307  av_parser_close(parser);
308  return pts;
309 }
310 
311 static int flac_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) {
312  int index;
313  int64_t pos;
314  AVIndexEntry e;
315  FLACDecContext *flac = s->priv_data;
316 
317  if (!flac->found_seektable || !(s->flags&AVFMT_FLAG_FAST_SEEK)) {
318  return -1;
319  }
320 
321  index = av_index_search_timestamp(s->streams[0], timestamp, flags);
322  if(index<0 || index >= s->streams[0]->nb_index_entries)
323  return -1;
324 
325  e = s->streams[0]->index_entries[index];
326  pos = avio_seek(s->pb, e.pos, SEEK_SET);
327  if (pos >= 0) {
328  return 0;
329  }
330  return -1;
331 }
332 
335  .name = "flac",
336  .long_name = NULL_IF_CONFIG_SMALL("raw FLAC"),
337  .read_probe = flac_probe,
338  .read_header = flac_read_header,
339  .read_packet = ff_raw_read_partial_packet,
340  .read_seek = flac_seek,
341  .read_timestamp = flac_read_timestamp,
342  .flags = AVFMT_GENERIC_INDEX,
343  .extensions = "flac",
344  .raw_codec_id = AV_CODEC_ID_FLAC,
345  .priv_data_size = sizeof(FLACDecContext),
346  .priv_class = &flac_demuxer_class,
347 };
AVStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1094
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:3372
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:4519
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVStreamInternal::avctx
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:169
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:91
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:406
FLACDecContext::raw_packet_size
int raw_packet_size
Definition: flacdec.c:35
av_unused
#define av_unused
Definition: attributes.h:131
flac_probe
static int flac_probe(const AVProbeData *p)
Definition: flacdec.c:232
AVPacket::data
uint8_t * data
Definition: packet.h:355
vorbiscomment.h
AVStream::internal
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1220
data
const char data[16]
Definition: mxf.c:91
AV_RB16
#define AV_RB16
Definition: intreadwrite.h:53
samples
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new samples
Definition: fate.txt:139
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: codec_id.h:422
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
FLAC_METADATA_TYPE_STREAMINFO
@ FLAC_METADATA_TYPE_STREAMINFO
Definition: flac.h:48
flac_read_header
static int flac_read_header(AVFormatContext *s)
Definition: flacdec.c:48
sample_rate
sample_rate
Definition: ffmpeg_filter.c:192
AVIndexEntry
Definition: avformat.h:795
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:803
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
flac_seek
static int flac_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: flacdec.c:311
fail
#define fail()
Definition: checkasm.h:123
av_add_index_entry
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2045
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:463
type
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 type
Definition: writing_filters.txt:86
av_parser_init
AVCodecParserContext * av_parser_init(int codec_id)
Definition: parser.c:34
pts
static int64_t pts
Definition: transcode_aac.c:647
AV_RB24
#define AV_RB24
Definition: intreadwrite.h:64
SEEKPOINT_SIZE
#define SEEKPOINT_SIZE
Definition: flacdec.c:31
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:914
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVInputFormat
Definition: avformat.h:636
mask
static const uint16_t mask[17]
Definition: lzw.c:38
av_dict_get
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
ff_raw_read_partial_packet
int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawdec.c:35
AV_RB64
#define AV_RB64
Definition: intreadwrite.h:164
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:641
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
FLAC_CHMODE_MID_SIDE
@ FLAC_CHMODE_MID_SIDE
Definition: flac.h:44
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVStream::need_parsing
enum AVStreamParseType need_parsing
Definition: avformat.h:1083
flac_picture.h
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
reset_index_position
static void reset_index_position(int64_t metadata_head_size, AVStream *st)
Definition: flacdec.c:39
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
internal.h
FLACDecContext
Definition: flacdec.c:33
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1012
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:894
NULL
#define NULL
Definition: coverity.c:32
rawdec.h
flac_parse_block_header
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
Definition: flac.h:145
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
FLAC_STREAMINFO_SIZE
#define FLAC_STREAMINFO_SIZE
Definition: flac.h:34
FLAC_METADATA_TYPE_PICTURE
@ FLAC_METADATA_TYPE_PICTURE
Definition: flac.h:54
AVCodecParserContext::flags
int flags
Definition: avcodec.h:3386
index
int index
Definition: gxfenc.c:89
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
flac_read_timestamp
static av_unused int64_t flac_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
Definition: flacdec.c:259
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
AVPacket::size
int size
Definition: packet.h:356
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:186
AVStream::nb_index_entries
int nb_index_entries
Definition: avformat.h:1096
AVCodecParserContext::next_frame_offset
int64_t next_frame_offset
Definition: avcodec.h:3359
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4938
size
int size
Definition: twinvq_data.h:11134
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
ff_flac_demuxer
AVInputFormat ff_flac_demuxer
Definition: flacdec.c:334
header
static const uint8_t header[24]
Definition: sdr2.c:67
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:354
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
FLAC_METADATA_TYPE_CUESHEET
@ FLAC_METADATA_TYPE_CUESHEET
Definition: flac.h:53
AVFMT_FLAG_FAST_SEEK
#define AVFMT_FLAG_FAST_SEEK
Enable fast, but inaccurate seeks for some formats.
Definition: avformat.h:1492
RETURN_ERROR
#define RETURN_ERROR(code)
Definition: flac_picture.h:27
FLAC_METADATA_TYPE_SEEKTABLE
@ FLAC_METADATA_TYPE_SEEKTABLE
Definition: flac.h:51
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
avpriv_new_chapter
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:4647
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodecParserContext
Definition: avcodec.h:3353
bytestream_get_buffer
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
Definition: bytestream.h:359
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:865
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
FLACDecContext::found_seektable
int found_seektable
Definition: flacdec.c:36
pos
unsigned int pos
Definition: spdifenc.c:410
avformat.h
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: avcodec.h:215
FLAC_MAX_CHANNELS
#define FLAC_MAX_CHANNELS
Definition: flac.h:35
oggdec.h
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
PARSER_FLAG_USE_CODEC_TS
#define PARSER_FLAG_USE_CODEC_TS
Definition: avcodec.h:3391
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:796
AVSTREAM_PARSE_FULL_RAW
@ AVSTREAM_PARSE_FULL_RAW
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:790
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
ff_flac_parse_picture
int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size, int truncate_workaround)
Definition: flac_picture.c:32
av_parser_parse2
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
Definition: parser.c:120
raw_flac_probe
static int raw_flac_probe(const AVProbeData *p)
Definition: flacdec.c:216
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry
Definition: dict.h:81
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:332
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
replaygain.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564
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:59
AVDictionaryEntry::value
char * value
Definition: dict.h:83
flac.h
ff_vorbis_comment
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size, int parse_picture)
Definition: oggparsevorbis.c:87
FLAC_METADATA_TYPE_VORBIS_COMMENT
@ FLAC_METADATA_TYPE_VORBIS_COMMENT
Definition: flac.h:52
AVFMT_EVENT_FLAG_METADATA_UPDATED
#define AVFMT_EVENT_FLAG_METADATA_UPDATED
The call resulted in updated metadata.
Definition: avformat.h:1651
av_parser_close
void av_parser_close(AVCodecParserContext *s)
Definition: parser.c:224
av_init_packet
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
av_index_search_timestamp
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2162
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
FF_RAW_DEMUXER_CLASS
#define FF_RAW_DEMUXER_CLASS(name)
Definition: rawdec.h:55