ac3_parser.c File Reference

Go to the source code of this file.

Functions
int	ff_ac3_parse_header (const uint8_t buf[7], AC3HeaderInfo *hdr)
	Parses AC-3 frame header.
int	ac3_sync (const uint8_t *buf, int *channels, int *sample_rate, int *bit_rate, int *samples)
static int	ac3_parse_init (AVCodecParserContext *s1)
Variables
static const uint8_t	eac3_blocks [4]
AVCodecParser	ac3_parser

---

Function Documentation

int ff_ac3_parse_header	(	const uint8_t	buf[7],
		AC3HeaderInfo *	hdr
	)

Parses AC-3 frame header.

Parses the header up to the lfeon element, which is the first 52 or 54 bits depending on the audio coding mode.

Parameters:

	buf[in]	Array containing the first 7 bytes of the frame.
	hdr[out]	Pointer to struct where header info is written.

Returns:

Returns 0 on success, -1 if there is a sync word mismatch, -2 if the bsid (version) element is invalid, -3 if the fscod (sample rate) element is invalid, or -4 if the frmsizecod (bit rate) element is invalid.

Definition at line 37 of file ac3_parser.c.

Referenced by ac3_parse_header(), ac3_probe(), ac3_sync(), and encode_frame().

int ac3_sync	(	const uint8_t *	buf,
		int *	channels,
		int *	sample_rate,
		int *	bit_rate,
		int *	samples
	)

Definition at line 88 of file ac3_parser.c.

Referenced by ac3_parse_init(), and encode_frame().

static int ac3_parse_init

(

AVCodecParserContext *

s1

)

[static]

Definition at line 150 of file ac3_parser.c.

---

Variable Documentation

const uint8_t eac3_blocks[4] [static]

Initial value:

 {
    1, 2, 3, 6
}

Definition at line 32 of file ac3_parser.c.

Referenced by ac3_sync().

AVCodecParser ac3_parser

Initial value:

 {
    { CODEC_ID_AC3 },
    sizeof(AACAC3ParseContext),
    ac3_parse_init,
    ff_aac_ac3_parse,
    NULL,
}

Definition at line 160 of file ac3_parser.c.