a52.h File Reference

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Data Structures
struct	vlc_a52_acmod_t
struct	vlc_a52_header_t
	AC3 header information. More...
Defines
#define	_VLC_A52_H   1
#define	VLC_A52_HEADER_SIZE   (8)
	Minimum AC3 header size that vlc_a52_header_Parse needs.
Functions
static int	vlc_a52_header_ParseAc3 (vlc_a52_header_t *p_header, const uint8_t *p_buf, const vlc_a52_acmod_t *p_acmod)
	It parse AC3 sync info.
static int	vlc_a52_header_ParseEac3 (vlc_a52_header_t *p_header, const uint8_t *p_buf, const vlc_a52_acmod_t *p_acmod)
	It parse E-AC3 sync info.
static int	vlc_a52_header_Parse (vlc_a52_header_t *p_header, const uint8_t *p_buffer, int i_buffer)
	It will parse the header AC3 frame and fill vlc_a52_header_t* if it is valid or return VLC_EGENERIC.

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Define Documentation

#define _VLC_A52_H   1

#define VLC_A52_HEADER_SIZE   (8)

Minimum AC3 header size that vlc_a52_header_Parse needs.

Referenced by A52CheckSync(), A52Init(), A52Probe(), DecodeBlock(), EA52Probe(), vlc_a52_header_Parse(), and vlc_a52_header_ParseEac3().

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Function Documentation

static int vlc_a52_header_Parse	(	vlc_a52_header_t *	p_header,
		const uint8_t *	p_buffer,
		int	i_buffer
	)			[inline, static]

It will parse the header AC3 frame and fill vlc_a52_header_t* if it is valid or return VLC_EGENERIC.

XXX It will only recognize big endian bitstream ie starting with 0x0b, 0x77

References AOUT_CHAN_CENTER, AOUT_CHAN_DUALMONO, AOUT_CHAN_LEFT, AOUT_CHAN_REARCENTER, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_RIGHT, vlc_a52_header_ParseAc3(), vlc_a52_header_ParseEac3(), VLC_A52_HEADER_SIZE, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by A52CheckSync(), and DecodeBlock().

static int vlc_a52_header_ParseAc3	(	vlc_a52_header_t *	p_header,
		const uint8_t *	p_buf,
		const vlc_a52_acmod_t *	p_acmod
	)			[inline, static]

It parse AC3 sync info.

This code is borrowed from liba52 by Aaron Holtzman & Michel Lespinasse, since we don't want to oblige S/PDIF people to use liba52 just to get their SyncInfo...

References AOUT_CHAN_DOLBYSTEREO, AOUT_CHAN_LEFT, AOUT_CHAN_LFE, AOUT_CHAN_RIGHT, vlc_a52_header_t::b_eac3, vlc_a52_header_t::i_bitrate, vlc_a52_header_t::i_channels, vlc_a52_header_t::i_channels_conf, vlc_a52_acmod_t::i_configuration, vlc_a52_acmod_t::i_count, vlc_a52_header_t::i_rate, vlc_a52_header_t::i_samples, vlc_a52_header_t::i_size, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by vlc_a52_header_Parse().

static int vlc_a52_header_ParseEac3	(	vlc_a52_header_t *	p_header,
		const uint8_t *	p_buf,
		const vlc_a52_acmod_t *	p_acmod
	)			[inline, static]

It parse E-AC3 sync info.

References AOUT_CHAN_LFE, vlc_a52_header_t::b_eac3, bs_init(), bs_read(), bs_read1(), bs_skip(), vlc_a52_header_t::i_bitrate, vlc_a52_header_t::i_channels, vlc_a52_header_t::i_channels_conf, vlc_a52_acmod_t::i_configuration, vlc_a52_acmod_t::i_count, vlc_a52_header_t::i_rate, vlc_a52_header_t::i_samples, vlc_a52_header_t::i_size, VLC_A52_HEADER_SIZE, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by vlc_a52_header_Parse().