FFmpeg
Macros | Functions | Variables
oggdec.c File Reference
#include <stdio.h>
#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include "oggdec.h"
#include "avformat.h"
#include "internal.h"
#include "vorbiscomment.h"

Go to the source code of this file.

Macros

#define MAX_PAGE_SIZE   65307
 
#define DECODER_BUFFER_SIZE   MAX_PAGE_SIZE
 

Functions

static int64_t ogg_calc_pts (AVFormatContext *s, int idx, int64_t *dts)
 
static int ogg_new_stream (AVFormatContext *s, uint32_t serial)
 
static int ogg_restore (AVFormatContext *s)
 
static void free_stream (AVFormatContext *s, int i)
 
static int ogg_save (AVFormatContext *s)
 
static int ogg_reset (AVFormatContext *s)
 
static const struct ogg_codec * ogg_find_codec (uint8_t *buf, int size)
 
static int ogg_replace_stream (AVFormatContext *s, uint32_t serial, int nsegs)
 Replace the current stream with a new one. More...
 
static int ogg_new_buf (struct ogg *ogg, int idx)
 
static int data_packets_seen (const struct ogg *ogg)
 
static int ogg_read_page (AVFormatContext *s, int *sid)
 
static int ogg_packet (AVFormatContext *s, int *sid, int *dstart, int *dsize, int64_t *fpos)
 find the next Ogg packet More...
 
static int ogg_get_length (AVFormatContext *s)
 
static int ogg_read_close (AVFormatContext *s)
 
static int ogg_read_header (AVFormatContext *s)
 
static void ogg_validate_keyframe (AVFormatContext *s, int idx, int pstart, int psize)
 
static int ogg_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static int64_t ogg_read_timestamp (AVFormatContext *s, int stream_index, int64_t *pos_arg, int64_t pos_limit)
 
static int ogg_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 
static int ogg_probe (const AVProbeData *p)
 

Variables

static const struct ogg_codec *const ogg_codecs []
 
AVInputFormat ff_ogg_demuxer
 

Macro Definition Documentation

#define MAX_PAGE_SIZE   65307

Definition at line 39 of file oggdec.c.

Referenced by ogg_get_length(), and ogg_read_page().

#define DECODER_BUFFER_SIZE   MAX_PAGE_SIZE

Definition at line 40 of file oggdec.c.

Referenced by ogg_new_stream().

Function Documentation

static int64_t ogg_calc_pts ( AVFormatContext *  s,
int  idx,
int64_t *  dts 
)
static

Definition at line 753 of file oggdec.c.

Referenced by ogg_get_length(), ogg_read_packet(), and ogg_read_timestamp().

static int ogg_new_stream ( AVFormatContext *  s,
uint32_t  serial 
)
static

Definition at line 263 of file oggdec.c.

Referenced by ogg_read_page(), and ogg_replace_stream().

static int ogg_restore ( AVFormatContext *  s)
static

Definition at line 118 of file oggdec.c.

Referenced by ogg_get_length(), and ogg_save().

static void free_stream ( AVFormatContext *  s,
int  i 
)
static

Definition at line 66 of file oggdec.c.

Referenced by ogg_read_close(), and ogg_restore().

static int ogg_save ( AVFormatContext *  s)
static

Definition at line 82 of file oggdec.c.

Referenced by ogg_get_length().

static int ogg_reset ( AVFormatContext *  s)
static

Definition at line 157 of file oggdec.c.

Referenced by ogg_get_length(), ogg_read_packet(), ogg_read_seek(), and ogg_read_timestamp().

static const struct ogg_codec* ogg_find_codec ( uint8_t *  buf,
int  size 
)
static

Definition at line 191 of file oggdec.c.

Referenced by ogg_packet(), and ogg_replace_stream().

static int ogg_replace_stream ( AVFormatContext *  s,
uint32_t  serial,
int  nsegs 
)
static

Replace the current stream with a new one.

This is a typical webradio situation where a new audio stream spawn (identified with a new serial) and must replace the previous one (track switch).

Definition at line 208 of file oggdec.c.

Referenced by ogg_read_page().

static int ogg_new_buf ( struct ogg *  ogg,
int  idx 
)
static

Definition at line 305 of file oggdec.c.

Referenced by ogg_read_page().

static int data_packets_seen ( const struct ogg *  ogg)
static

Definition at line 326 of file oggdec.c.

Referenced by ogg_read_page().

static int ogg_read_page ( AVFormatContext *  s,
int *  sid 
)
static

Definition at line 336 of file oggdec.c.

Referenced by ogg_get_length(), and ogg_packet().

static int ogg_packet ( AVFormatContext *  s,
int *  sid,
int *  dstart,
int *  dsize,
int64_t *  fpos 
)
static

find the next Ogg packet

Parameters
*sidis set to the stream for the packet or -1 if there is no matching stream, in that case assume all other return values to be uninitialized.
Returns
negative value on error or EOF.

Definition at line 477 of file oggdec.c.

Referenced by encode_frame(), encode_init(), libvorbis_encode_frame(), libvorbis_encode_init(), ogg_get_length(), ogg_read_header(), ogg_read_packet(), ogg_read_timestamp(), and oggvorbis_decode_frame().

static int ogg_get_length ( AVFormatContext *  s)
static

Definition at line 620 of file oggdec.c.

Referenced by ogg_read_header().

static int ogg_read_close ( AVFormatContext *  s)
static

Definition at line 689 of file oggdec.c.

Referenced by ogg_read_header().

static int ogg_read_header ( AVFormatContext *  s)
static

Definition at line 704 of file oggdec.c.

static void ogg_validate_keyframe ( AVFormatContext *  s,
int  idx,
int  pstart,
int  psize 
)
static

Definition at line 783 of file oggdec.c.

Referenced by ogg_read_packet(), and ogg_read_timestamp().

static int ogg_read_packet ( AVFormatContext *  s,
AVPacket *  pkt 
)
static

Definition at line 804 of file oggdec.c.

static int64_t ogg_read_timestamp ( AVFormatContext *  s,
int  stream_index,
int64_t *  pos_arg,
int64_t  pos_limit 
)
static

Definition at line 877 of file oggdec.c.

static int ogg_read_seek ( AVFormatContext *  s,
int  stream_index,
int64_t  timestamp,
int  flags 
)
static

Definition at line 918 of file oggdec.c.

static int ogg_probe ( const AVProbeData *  p)
static

Definition at line 944 of file oggdec.c.

Variable Documentation

const struct ogg_codec* const ogg_codecs[]
static
Initial value:
= {
&ff_skeleton_codec,
&ff_daala_codec,
&ff_dirac_codec,
&ff_speex_codec,
&ff_vorbis_codec,
&ff_theora_codec,
&ff_flac_codec,
&ff_celt_codec,
&ff_opus_codec,
&ff_vp8_codec,
&ff_old_dirac_codec,
&ff_old_flac_codec,
&ff_ogm_video_codec,
&ff_ogm_audio_codec,
&ff_ogm_text_codec,
&ff_ogm_old_codec,
NULL
}
NULL
#define NULL
Definition: coverity.c:32
ff_celt_codec
const struct ogg_codec ff_celt_codec
Definition: oggparsecelt.c:90
ff_ogm_old_codec
const struct ogg_codec ff_ogm_old_codec
Definition: oggparseogm.c:221
ff_ogm_video_codec
const struct ogg_codec ff_ogm_video_codec
Definition: oggparseogm.c:194
ff_skeleton_codec
const struct ogg_codec ff_skeleton_codec
Definition: oggparseskeleton.c:96
ff_opus_codec
const struct ogg_codec ff_opus_codec
Definition: oggparseopus.c:180
ff_vorbis_codec
const struct ogg_codec ff_vorbis_codec
Definition: oggparsevorbis.c:499
ff_vp8_codec
const struct ogg_codec ff_vp8_codec
Definition: oggparsevp8.c:139
ff_ogm_audio_codec
const struct ogg_codec ff_ogm_audio_codec
Definition: oggparseogm.c:203
ff_theora_codec
const struct ogg_codec ff_theora_codec
Definition: oggparsetheora.c:211
ff_flac_codec
const struct ogg_codec ff_flac_codec
Definition: oggparseflac.c:128
ff_old_dirac_codec
const struct ogg_codec ff_old_dirac_codec
Definition: oggparsedirac.c:125
ff_old_flac_codec
const struct ogg_codec ff_old_flac_codec
Definition: oggparseflac.c:135
ff_dirac_codec
const struct ogg_codec ff_dirac_codec
Definition: oggparsedirac.c:116
ff_speex_codec
const struct ogg_codec ff_speex_codec
Definition: oggparsespeex.c:147
ff_ogm_text_codec
const struct ogg_codec ff_ogm_text_codec
Definition: oggparseogm.c:212
ff_daala_codec
const struct ogg_codec ff_daala_codec
Definition: oggparsedaala.c:252

Definition at line 42 of file oggdec.c.

AVInputFormat ff_ogg_demuxer
Initial value:
= {
.name = "ogg",
.long_name = NULL_IF_CONFIG_SMALL("Ogg"),
.priv_data_size = sizeof(struct ogg),
.read_probe = ogg_probe,
.read_header = ogg_read_header,
.read_packet = ogg_read_packet,
.read_close = ogg_read_close,
.read_seek = ogg_read_seek,
.read_timestamp = ogg_read_timestamp,
.extensions = "ogg",
.flags = AVFMT_GENERIC_INDEX | AVFMT_TS_DISCONT | AVFMT_NOBINSEARCH,
}
AVFMT_NOBINSEARCH
#define AVFMT_NOBINSEARCH
Format does not allow to fall back on binary search via read_timestamp.
Definition: avformat.h:473
ogg_read_packet
static int ogg_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: oggdec.c:804
ogg_read_seek
static int ogg_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: oggdec.c:918
AVFMT_TS_DISCONT
#define AVFMT_TS_DISCONT
Format allows timestamp discontinuities.
Definition: avformat.h:469
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
ogg_read_close
static int ogg_read_close(AVFormatContext *s)
Definition: oggdec.c:689
ogg_probe
static int ogg_probe(const AVProbeData *p)
Definition: oggdec.c:944
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:468
ogg_read_header
static int ogg_read_header(AVFormatContext *s)
Definition: oggdec.c:704
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
ogg
Definition: oggdec.h:101
ogg_read_timestamp
static int64_t ogg_read_timestamp(AVFormatContext *s, int stream_index, int64_t *pos_arg, int64_t pos_limit)
Definition: oggdec.c:877

Definition at line 951 of file oggdec.c.

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