tak.c File Reference

#include "libavutil/bswap.h"
#include "libavutil/crc.h"
#include "libavutil/intreadwrite.h"
#include "tak.h"

Go to the source code of this file.

Macros
#define	CRC_TABLE_SIZE   1024

Functions
static int	tak_get_nb_samples (int sample_rate, enum TAKFrameSizeType type)
av_cold void	ff_tak_init_crc (void)
int	ff_tak_check_crc (const uint8_t *buf, unsigned int buf_size)
void	avpriv_tak_parse_streaminfo (GetBitContext *gb, TAKStreamInfo *s)
	Parse the Streaminfo metadata block.
int	ff_tak_decode_frame_header (AVCodecContext *avctx, GetBitContext *gb, TAKStreamInfo *ti, int log_level_offset)
	Validate and decode a frame header.

Variables
static const int64_t	tak_channel_layouts []
static const uint16_t	frame_duration_type_quants []
static int	crc_init = 0
static AVCRC	crc_24 [CRC_TABLE_SIZE]

Macro Definition Documentation

#define CRC_TABLE_SIZE   1024

Definition at line 80 of file tak.c.

Function Documentation

static int tak_get_nb_samples ( int  sample_rate, enum TAKFrameSizeType  type  )

static

Definition at line 53 of file tak.c.

Referenced by avpriv_tak_parse_streaminfo().

av_cold void ff_tak_init_crc

(

void

)

Definition at line 84 of file tak.c.

Referenced by tak_decode_init(), and tak_init().

int ff_tak_check_crc	(	const uint8_t *	buf,
		unsigned int	buf_size
	)

Definition at line 92 of file tak.c.

Referenced by tak_decode_frame(), and tak_parse().

void avpriv_tak_parse_streaminfo	(	GetBitContext *	gb,
		TAKStreamInfo *	s
	)

Parse the Streaminfo metadata block.

Parameters

[in]	gb	pointer to GetBitContext
[out]	s	storage for parsed information

Definition at line 108 of file tak.c.

Referenced by ff_tak_decode_frame_header(), and tak_read_header().

int ff_tak_decode_frame_header	(	AVCodecContext *	avctx,
		GetBitContext *	gb,
		TAKStreamInfo *	s,
		int	log_level_offset
	)

Validate and decode a frame header.

Parameters

	avctx	AVCodecContext to use as av_log() context
[in]	gb	GetBitContext from which to read frame header
[out]	s	frame information
	log_level_offset	log level offset, can be used to silence error messages.

Returns

non-zero on error, 0 if OK

Definition at line 143 of file tak.c.

Referenced by tak_decode_frame(), and tak_parse().

Variable Documentation

const int64_t tak_channel_layouts[]

static

Initial value:

= {
    0,
    AV_CH_FRONT_LEFT,
    AV_CH_FRONT_RIGHT,
    AV_CH_FRONT_CENTER,
    AV_CH_LOW_FREQUENCY,
    AV_CH_BACK_LEFT,
    AV_CH_BACK_RIGHT,
    AV_CH_FRONT_LEFT_OF_CENTER,
    AV_CH_FRONT_RIGHT_OF_CENTER,
    AV_CH_BACK_CENTER,
    AV_CH_SIDE_LEFT,
    AV_CH_SIDE_RIGHT,
    AV_CH_TOP_CENTER,
    AV_CH_TOP_FRONT_LEFT,
    AV_CH_TOP_FRONT_CENTER,
    AV_CH_TOP_FRONT_RIGHT,
    AV_CH_TOP_BACK_LEFT,
    AV_CH_TOP_BACK_CENTER,
    AV_CH_TOP_BACK_RIGHT,
}

Definition at line 27 of file tak.c.

Referenced by avpriv_tak_parse_streaminfo().

const uint16_t frame_duration_type_quants[]

static

Initial value:

= {
    3, 4, 6, 8, 4096, 8192, 16384, 512, 1024, 2048,
}

Definition at line 49 of file tak.c.

Referenced by tak_get_nb_samples().

int crc_init = 0

static

Definition at line 76 of file tak.c.

Referenced by ff_tak_init_crc().

AVCRC crc_24[CRC_TABLE_SIZE]

static

Definition at line 82 of file tak.c.

Referenced by ff_tak_check_crc(), and ff_tak_init_crc().