mpegaudiodecheader.c File Reference

MPEG Audio header decoder. More...

#include <string.h>
#include "libavutil/error.h"
#include "libavutil/macros.h"
#include "libavutil/mem.h"
#include "mpegaudio.h"
#include "mpegaudiodata.h"
#include "mpegaudiodecheader.h"

Go to the source code of this file.

Functions
int	ff_mpegaudio_decode_header (MPADecodeHeader2 *s, uint32_t header)
int	avpriv_mpegaudio_decode_header2 (MPADecodeHeader2 **phdr, uint32_t header)
	Decode an MPEG audio header into *phdr, which is allocated if it is NULL.
int	ff_mpa_decode_header (uint32_t head, int *sample_rate, int *channels, int *frame_size, int *bit_rate, enum AVCodecID *codec_id)

Detailed Description

MPEG Audio header decoder.

Definition in file mpegaudiodecheader.c.

Function Documentation

ff_mpegaudio_decode_header()

int ff_mpegaudio_decode_header	(	MPADecodeHeader2 *	s,
		uint32_t	header )

Definition at line 38 of file mpegaudiodecheader.c.

Referenced by avpriv_mpegaudio_decode_header2(), decode_frame(), ff_mpa_decode_header(), libshine_encode_frame(), and mp3lame_encode_frame().

avpriv_mpegaudio_decode_header2()

int avpriv_mpegaudio_decode_header2	(	MPADecodeHeader2 **	phdr,
		uint32_t	header )

Decode an MPEG audio header into *phdr, which is allocated if it is NULL.

The header must have been checked beforehand, as no consistency check is done here.

Returns

1 if free format was found and the frame size must be computed externally, 0 on success, a negative AVERROR code on failure

Definition at line 128 of file mpegaudiodecheader.c.

Referenced by check(), main(), mp3_parse_vbr_tags(), mp3_read_probe(), mp3_write_audio_packet(), and mp3_write_xing().

ff_mpa_decode_header()

int ff_mpa_decode_header	(	uint32_t	head,
		int *	sample_rate,
		int *	channels,
		int *	frame_size,
		int *	bit_rate,
		enum AVCodecID *	codec_id )

Definition at line 176 of file mpegaudiodecheader.c.

Referenced by ffat_create_decoder(), and mpegaudio_parse().