cabac.h File Reference

Context Adaptive Binary Arithmetic Coder. More...

#include <stdint.h>
#include "put_bits.h"

Go to the source code of this file.

Data Structures
struct	CABACContext

Macros
#define	H264_NORM_SHIFT_OFFSET   0
#define	H264_LPS_RANGE_OFFSET   512
#define	H264_MLPS_STATE_OFFSET   1024
#define	H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET   1280
#define	CABAC_BITS   16
#define	CABAC_MASK   ((1<<CABAC_BITS)-1)

Functions
void	ff_init_cabac_encoder (CABACContext *c, uint8_t *buf, int buf_size)
void	ff_init_cabac_decoder (CABACContext *c, const uint8_t *buf, int buf_size)
void	ff_init_cabac_states (void)

Variables
uint8_t	ff_h264_cabac_tables [512+4 *2 *64+4 *64+63]

Detailed Description

Context Adaptive Binary Arithmetic Coder.

Definition in file cabac.h.

Macro Definition Documentation

#define H264_NORM_SHIFT_OFFSET   0

Definition at line 35 of file cabac.h.

#define H264_LPS_RANGE_OFFSET   512

Definition at line 36 of file cabac.h.

#define H264_MLPS_STATE_OFFSET   1024

Definition at line 37 of file cabac.h.

#define H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET   1280

Definition at line 38 of file cabac.h.

#define CABAC_BITS   16

Definition at line 40 of file cabac.h.

Referenced by ff_h264_decode_mb_cabac(), get_cabac_bypass(), get_cabac_bypass_sign(), get_cabac_inline(), get_cabac_terminate(), refill(), and refill2().

#define CABAC_MASK   ((1<<CABAC_BITS)-1)

Definition at line 41 of file cabac.h.

Referenced by get_cabac_bypass(), get_cabac_bypass_sign(), get_cabac_inline(), refill(), refill2(), and renorm_cabac_decoder_once().

Function Documentation

void ff_init_cabac_encoder	(	CABACContext *	c,
		uint8_t *	buf,
		int	buf_size
	)

Parameters

buf_size

size of buf in bits

Definition at line 110 of file cabac.c.

void ff_init_cabac_decoder	(	CABACContext *	c,
		const uint8_t *	buf,
		int	buf_size
	)

Parameters

buf_size

size of buf in bits

Definition at line 123 of file cabac.c.

Referenced by cabac_init_decoder(), decode_slice(), ff_h264_decode_mb_cabac(), hls_decode_entry_wpp(), and skip_bytes().

void ff_init_cabac_states

(

void

)

Definition at line 138 of file cabac.c.

Referenced by ff_h264_decode_init(), and hevc_decode_init().

Variable Documentation

uint8_t ff_h264_cabac_tables[512+4 *2 *64+4 *64+63]

Definition at line 35 of file cabac.c.