libavcodec/flac.h File Reference

FLAC (Free Lossless Audio Codec) decoder/demuxer common functions. More...

#include "avcodec.h"

Go to the source code of this file.

Data Structures
struct	FLACStreaminfo
Defines
#define	FLAC_STREAMINFO_SIZE   34
#define	FLACSTREAMINFO
	Data needed from the Streaminfo header for use by the raw FLAC demuxer and/or the FLAC decoder.
Enumerations
enum	{   FLAC_METADATA_TYPE_STREAMINFO = 0, FLAC_METADATA_TYPE_PADDING, FLAC_METADATA_TYPE_APPLICATION, FLAC_METADATA_TYPE_SEEKTABLE,   FLAC_METADATA_TYPE_VORBIS_COMMENT, FLAC_METADATA_TYPE_CUESHEET, FLAC_METADATA_TYPE_PICTURE, FLAC_METADATA_TYPE_INVALID = 127 }
enum	FLACExtradataFormat { FLAC_EXTRADATA_FORMAT_STREAMINFO = 0, FLAC_EXTRADATA_FORMAT_FULL_HEADER = 1 }
Functions
void	ff_flac_parse_streaminfo (AVCodecContext *avctx, struct FLACStreaminfo *s, const uint8_t *buffer)
	Parse the Streaminfo metadata block.
int	ff_flac_is_extradata_valid (AVCodecContext *avctx, enum FLACExtradataFormat *format, uint8_t **streaminfo_start)
	Validate the FLAC extradata.

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Detailed Description

FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.

Definition in file flac.h.

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Define Documentation

#define FLAC_STREAMINFO_SIZE   34

Definition at line 32 of file flac.h.

Referenced by ff_flac_is_extradata_valid(), ff_flac_parse_streaminfo(), flac_encode_init(), flac_header(), flac_write_trailer(), ogg_build_flac_headers(), and write_streaminfo().

#define FLACSTREAMINFO

Value:

int min_blocksize;      \
    int max_blocksize;      \
    int max_framesize;      \
    int samplerate;         \
    int channels;           \
    int bps;                \
    int64_t samples;

Data needed from the Streaminfo header for use by the raw FLAC demuxer and/or the FLAC decoder.

total number of samples

Definition at line 54 of file flac.h.

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Enumeration Type Documentation

anonymous enum

Enumerator:

FLAC_METADATA_TYPE_STREAMINFO
FLAC_METADATA_TYPE_PADDING
FLAC_METADATA_TYPE_APPLICATION
FLAC_METADATA_TYPE_SEEKTABLE
FLAC_METADATA_TYPE_VORBIS_COMMENT
FLAC_METADATA_TYPE_CUESHEET
FLAC_METADATA_TYPE_PICTURE
FLAC_METADATA_TYPE_INVALID

Definition at line 34 of file flac.h.

enum FLACExtradataFormat

Enumerator:

FLAC_EXTRADATA_FORMAT_STREAMINFO
FLAC_EXTRADATA_FORMAT_FULL_HEADER

Definition at line 45 of file flac.h.

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Function Documentation

int ff_flac_is_extradata_valid	(	AVCodecContext *	avctx,
		enum FLACExtradataFormat *	format,
		uint8_t **	streaminfo_start
	)

Validate the FLAC extradata.

Parameters:

[in]	avctx	codec context containing the extradata.
[out]	format	extradata format.
[out]	streaminfo_start	pointer to start of 34-byte STREAMINFO data.

Returns:

1 if valid, 0 if not valid.

Definition at line 100 of file flacdec.c.

Referenced by ff_flac_write_header(), flac_decode_init(), flac_write_trailer(), and ogg_build_flac_headers().

void ff_flac_parse_streaminfo	(	AVCodecContext *	avctx,
		struct FLACStreaminfo *	s,
		const uint8_t *	buffer
	)

Parse the Streaminfo metadata block.

Parameters:

[out]	avctx	codec context to set basic stream parameters
[out]	s	where parsed information is stored
[in]	buffer	pointer to start of 34-byte streaminfo data

Definition at line 183 of file flacdec.c.

Referenced by flac_decode_init(), flac_header(), and metadata_parse().