vorbis_parser.c File Reference

Vorbis audio parser. More...

#include "libavutil/log.h"
#include "get_bits.h"
#include "parser.h"
#include "xiph.h"
#include "vorbis_parser_internal.h"

Go to the source code of this file.

Functions
static int	parse_id_header (AVVorbisParseContext *s, const uint8_t *buf, int buf_size)
static int	parse_setup_header (AVVorbisParseContext *s, const uint8_t *buf, int buf_size)
static int	vorbis_parse_init (AVVorbisParseContext *s, const uint8_t *extradata, int extradata_size)
int	av_vorbis_parse_frame_flags (AVVorbisParseContext *s, const uint8_t *buf, int buf_size, int *flags)
	Get the duration for a Vorbis packet.
int	av_vorbis_parse_frame (AVVorbisParseContext *s, const uint8_t *buf, int buf_size)
	Get the duration for a Vorbis packet.
void	av_vorbis_parse_reset (AVVorbisParseContext *s)
void	av_vorbis_parse_free (AVVorbisParseContext **s)
	Free the parser and everything associated with it.
AVVorbisParseContext *	av_vorbis_parse_init (const uint8_t *extradata, int extradata_size)
	Allocate and initialize the Vorbis parser using headers in the extradata.
int	avpriv_vorbis_parse_extradata (AVCodecContext *avctx, AVVorbisParseContext *s)
	Initialize the Vorbis parser using headers in the extradata.
void	avpriv_vorbis_parse_reset (AVVorbisParseContext *s)
int	avpriv_vorbis_parse_frame (AVVorbisParseContext *s, const uint8_t *buf, int buf_size)
	Get the duration for a Vorbis packet.
int	avpriv_vorbis_parse_frame_flags (AVVorbisParseContext *s, const uint8_t *buf, int buf_size, int *flags)
	Get the duration for a Vorbis packet.

Variables
static const AVClass	vorbis_parser_class

Detailed Description

Vorbis audio parser.

Determines the duration for each packet.

Definition in file vorbis_parser.c.

Function Documentation

static int parse_id_header ( AVVorbisParseContext *  s, const uint8_t *  buf, int  buf_size  )

static

Definition at line 41 of file vorbis_parser.c.

Referenced by vorbis_parse_init().

static int parse_setup_header ( AVVorbisParseContext *  s, const uint8_t *  buf, int  buf_size  )

static

Definition at line 73 of file vorbis_parser.c.

Referenced by vorbis_parse_init().

static int vorbis_parse_init ( AVVorbisParseContext *  s, const uint8_t *  extradata, int  extradata_size  )

static

Definition at line 184 of file vorbis_parser.c.

Referenced by av_vorbis_parse_init(), and avpriv_vorbis_parse_extradata().

int av_vorbis_parse_frame_flags	(	AVVorbisParseContext *	s,
		const uint8_t *	buf,
		int	buf_size,
		int *	flags
	)

Get the duration for a Vorbis packet.

If flags is NULL, special frames are considered invalid.

Parameters

s	Vorbis parser context
buf	buffer containing a Vorbis frame
buf_size	size of the buffer
flags	flags for special frames

Definition at line 213 of file vorbis_parser.c.

Referenced by av_vorbis_parse_frame(), avpriv_vorbis_parse_frame_flags(), and vorbis_packet().

int av_vorbis_parse_frame	(	AVVorbisParseContext *	s,
		const uint8_t *	buf,
		int	buf_size
	)

Get the duration for a Vorbis packet.

Parameters

s	Vorbis parser context
buf	buffer containing a Vorbis frame
buf_size	size of the buffer

Definition at line 264 of file vorbis_parser.c.

Referenced by avpriv_vorbis_parse_frame(), and libvorbis_encode_frame().

void av_vorbis_parse_reset

(

AVVorbisParseContext *

s

)

Definition at line 270 of file vorbis_parser.c.

Referenced by avpriv_vorbis_parse_reset(), and vorbis_packet().

void av_vorbis_parse_free

(

AVVorbisParseContext **

s

)

Free the parser and everything associated with it.

Definition at line 276 of file vorbis_parser.c.

Referenced by av_vorbis_parse_init(), libvorbis_encode_close(), and vorbis_cleanup().

AVVorbisParseContext* av_vorbis_parse_init	(	const uint8_t *	extradata,
		int	extradata_size
	)

Allocate and initialize the Vorbis parser using headers in the extradata.

Parameters

avctx	codec context
s	Vorbis parser context

Definition at line 281 of file vorbis_parser.c.

Referenced by libvorbis_encode_init(), and vorbis_header().

int avpriv_vorbis_parse_extradata	(	AVCodecContext *	avctx,
		AVVorbisParseContext *	s
	)

Initialize the Vorbis parser using headers in the extradata.

Parameters

avctx	codec context
s	Vorbis parser context

Definition at line 300 of file vorbis_parser.c.

void avpriv_vorbis_parse_reset

(

AVVorbisParseContext *

s

)

Definition at line 304 of file vorbis_parser.c.

int avpriv_vorbis_parse_frame	(	AVVorbisParseContext *	s,
		const uint8_t *	buf,
		int	buf_size
	)

Get the duration for a Vorbis packet.

avpriv_vorbis_parse_extradata() must have been successfully called prior to this in order for a correct duration to be returned.

Parameters

s	Vorbis parser context
buf	buffer containing a Vorbis frame
buf_size	size of the buffer

Definition at line 308 of file vorbis_parser.c.

int avpriv_vorbis_parse_frame_flags	(	AVVorbisParseContext *	s,
		const uint8_t *	buf,
		int	buf_size,
		int *	flags
	)

Get the duration for a Vorbis packet.

avpriv_vorbis_parse_extradata() must have been successfully called prior to this in order for a correct duration to be returned. If flags is NULL, special frames are considered invalid.

Parameters

s	Vorbis parser context
buf	buffer containing a Vorbis frame
buf_size	size of the buffer
flags	flags for special frames

Definition at line 313 of file vorbis_parser.c.

Variable Documentation

const AVClass vorbis_parser_class

static

Initial value:

= {
    .class_name = "Vorbis parser",
    .item_name  = av_default_item_name,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 35 of file vorbis_parser.c.

Referenced by vorbis_parse_init().