dolby_e_parse.c File Reference

#include "get_bits.h"
#include "put_bits.h"
#include "dolby_e.h"

Go to the source code of this file.

Functions
static int	skip_input (DBEContext *s, int nb_words)
static int	parse_key (DBEContext *s)
int	ff_dolby_e_convert_input (DBEContext *s, int nb_words, int key)
	Use the provided key to transform the input into data (put into s->buffer) suitable for further processing and initialize s->gb to read said data. More...
int	ff_dolby_e_parse_header (DBEContext *s, const uint8_t *buf, int buf_size)
	Initialize DBEContext and parse Dolby E metadata. More...

Variables
static const uint8_t	nb_programs_tab [MAX_PROG_CONF+1]
static const uint8_t	nb_channels_tab [MAX_PROG_CONF+1]
static const uint16_t	sample_rate_tab [16]

Function Documentation

skip_input()

static int skip_input ( DBEContext *  s, int  nb_words  )

static

Definition at line 37 of file dolby_e_parse.c.

Referenced by ff_dolby_e_parse_header(), and parse_key().

parse_key()

static int parse_key ( DBEContext *  s )

static

Definition at line 48 of file dolby_e_parse.c.

Referenced by ff_dolby_e_parse_header().

ff_dolby_e_convert_input()

int ff_dolby_e_convert_input	(	DBEContext *	s,
		int	nb_words,
		int	key
	)

Use the provided key to transform the input into data (put into s->buffer) suitable for further processing and initialize s->gb to read said data.

Definition at line 60 of file dolby_e_parse.c.

Referenced by ff_dolby_e_parse_header(), and parse_audio().

ff_dolby_e_parse_header()

int ff_dolby_e_parse_header	(	DBEContext *	s,
		const uint8_t *	buf,
		int	buf_size
	)

Initialize DBEContext and parse Dolby E metadata.

Set word_bits/word_bytes, input, input_size, key_present and parse the header up to the end_gain element.

Parameters

[out]	s	DBEContext.
[in]	buf	raw input buffer.
[in]	buf_size	must be 3 bytes at least.

Returns

Returns 0 on success, AVERROR_INVALIDDATA on error

Definition at line 97 of file dolby_e_parse.c.

Referenced by dolby_e_decode_frame(), and dolby_e_parse().

Variable Documentation

nb_programs_tab

const uint8_t nb_programs_tab[MAX_PROG_CONF+1]

static

Initial value:

= {
    2, 3, 2, 3, 4, 5, 4, 5, 6, 7, 8, 1, 2, 3, 3, 4, 5, 6, 1, 2, 3, 4, 1, 1
}

Definition at line 25 of file dolby_e_parse.c.

Referenced by ff_dolby_e_parse_header().

nb_channels_tab

const uint8_t nb_channels_tab[MAX_PROG_CONF+1]

static

Initial value:

= {
    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 8, 8
}

Definition at line 29 of file dolby_e_parse.c.

Referenced by ff_dolby_e_parse_header().

sample_rate_tab

const uint16_t sample_rate_tab[16]

static

Initial value:

= {
    0, 42965, 43008, 44800, 53706, 53760
}

Definition at line 33 of file dolby_e_parse.c.

Referenced by ff_dolby_e_parse_header().