oggdec.c File Reference

#include <stdio.h>
#include "libavutil/avassert.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_save (AVFormatContext *s)
static int	ogg_restore (AVFormatContext *s, int discard)
static int	ogg_reset (AVFormatContext *s)
static 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.
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
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 (AVProbeData *p)

Variables
static struct ogg_codec *const	ogg_codecs []
AVInputFormat	ff_ogg_demuxer

Macro Definition Documentation

#define MAX_PAGE_SIZE   65307

Definition at line 38 of file oggdec.c.

Referenced by ogg_get_length(), and ogg_read_page().

#define DECODER_BUFFER_SIZE   MAX_PAGE_SIZE

Definition at line 39 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 687 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 228 of file oggdec.c.

Referenced by ogg_read_page(), and ogg_replace_stream().

static int ogg_save ( AVFormatContext *  s )

static

Definition at line 63 of file oggdec.c.

Referenced by ogg_get_length().

static int ogg_restore ( AVFormatContext *  s, int  discard  )

static

Definition at line 86 of file oggdec.c.

Referenced by ogg_get_length().

static int ogg_reset ( AVFormatContext *  s )

static

Definition at line 125 of file oggdec.c.

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

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

staticread

Definition at line 156 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 173 of file oggdec.c.

Referenced by ogg_read_page().

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

static

Definition at line 270 of file oggdec.c.

Referenced by ogg_read_page().

static int data_packets_seen ( const struct ogg *  ogg )

static

Definition at line 288 of file oggdec.c.

Referenced by ogg_read_page().

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

static

Definition at line 298 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 436 of file oggdec.c.

Referenced by encode_frame(), encode_init(), ogg_get_length(), ogg_read_header(), ogg_read_packet(), ogg_read_timestamp(), oggvorbis_decode_frame(), oggvorbis_encode_frame(), and oggvorbis_encode_init().

static int ogg_get_length ( AVFormatContext *  s )

static

Definition at line 571 of file oggdec.c.

Referenced by ogg_read_header().

static int ogg_read_close ( AVFormatContext *  s )

static

Definition at line 633 of file oggdec.c.

Referenced by ogg_read_header().

static int ogg_read_header ( AVFormatContext *  s )

static

Definition at line 650 of file oggdec.c.

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

static

Definition at line 717 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 730 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 778 of file oggdec.c.

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

static

Definition at line 814 of file oggdec.c.

static int ogg_probe ( AVProbeData *  p )

static

Definition at line 839 of file oggdec.c.

Variable Documentation

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_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 41 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,
}

Definition at line 846 of file oggdec.c.