oggdec.c File Reference

#include <stdio.h>
#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include "avio_internal.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, char *magic, int page_size, int probing)
	Replace the current stream with a new one. More...
static int	data_packets_seen (const struct ogg *ogg)
static int	buf_realloc (struct ogg_stream *os, int size)
static int	ogg_read_page (AVFormatContext *s, int *sid, int probing)
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 40 of file oggdec.c.

Referenced by ogg_get_length(), and ogg_read_page().

#define DECODER_BUFFER_SIZE   MAX_PAGE_SIZE

Definition at line 41 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 774 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 248 of file oggdec.c.

Referenced by ogg_read_page().

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 192 of file oggdec.c.

Referenced by ogg_packet(), and ogg_replace_stream().

static int ogg_replace_stream ( AVFormatContext *  s, uint32_t  serial, char *  magic, int  page_size, int  probing  )

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 209 of file oggdec.c.

Referenced by ogg_read_page().

static int data_packets_seen ( const struct ogg *  ogg )

static

Definition at line 290 of file oggdec.c.

Referenced by ogg_read_page().

static int buf_realloc ( struct ogg_stream *  os, int  size  )

static

Definition at line 300 of file oggdec.c.

Referenced by ogg_read_page().

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

static

Definition at line 314 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

*sid	is 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 498 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 641 of file oggdec.c.

Referenced by ogg_read_header().

static int ogg_read_close ( AVFormatContext *  s )

static

Definition at line 710 of file oggdec.c.

Referenced by ogg_read_header().

static int ogg_read_header ( AVFormatContext *  s )

static

Definition at line 725 of file oggdec.c.

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

static

Definition at line 804 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 825 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 895 of file oggdec.c.

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

static

Definition at line 936 of file oggdec.c.

static int ogg_probe ( const AVProbeData *  p )

static

Definition at line 962 of file oggdec.c.

Variable Documentation

const struct ogg_codec* const ogg_codecs[]

static

Initial value:

= {
    &ff_skeleton_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
}

Definition at line 43 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,
}

Definition at line 969 of file oggdec.c.