cabac.h File Reference

---

Detailed Description

Context Adaptive Binary Arithmetic Coder.

Definition in file cabac.h.

Go to the source code of this file.

Classes
struct	CABACContext
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 (CABACContext *c)
static void	put_cabac_bit (CABACContext *c, int b)
static void	renorm_cabac_encoder (CABACContext *c)
static void	put_cabac (CABACContext *c, uint8_t *const state, int bit)
static void	put_cabac_static (CABACContext *c, int RangeLPS, int bit)
static void	put_cabac_bypass (CABACContext *c, int bit)
static int	put_cabac_terminate (CABACContext *c, int bit)
static void	put_cabac_u (CABACContext *c, uint8_t *state, int v, int max, int max_index, int truncated)
	put (truncated) unary binarization.
static void	put_cabac_ueg (CABACContext *c, uint8_t *state, int v, int max, int is_signed, int k, int max_index)
	put unary exp golomb k-th order binarization.
static void	refill (CABACContext *c)
static void	refill2 (CABACContext *c)
static void	renorm_cabac_decoder (CABACContext *c)
static void	renorm_cabac_decoder_once (CABACContext *c)
static av_always_inline int	get_cabac_inline (CABACContext *c, uint8_t *const state)
static int av_noinline	get_cabac_noinline (CABACContext *c, uint8_t *const state)
static int	get_cabac (CABACContext *c, uint8_t *const state)
static int	get_cabac_bypass (CABACContext *c)
static av_always_inline int	get_cabac_bypass_sign (CABACContext *c, int val)
static int	get_cabac_terminate (CABACContext *c)
static int	get_cabac_u (CABACContext *c, uint8_t *state, int max, int max_index, int truncated)
	Get (truncated) unary binarization.
static int	get_cabac_ueg (CABACContext *c, uint8_t *state, int max, int is_signed, int k, int max_index)
	get unary exp golomb k-th order binarization.
Variables
uint8_t	ff_h264_mlps_state [4 *64]
uint8_t	ff_h264_lps_range [4 *2 *64]
	rangeTabLPS
uint8_t	ff_h264_mps_state [2 *64]
	transIdxMPS
uint8_t	ff_h264_lps_state [2 *64]
	transIdxLPS
const uint8_t	ff_h264_norm_shift [512]

---

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 117 of file cabac.c.

Referenced by main().

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 134 of file cabac.c.

Referenced by decode_mb_cabac(), decode_slice(), and main().

void ff_init_cabac_states

(

CABACContext *

c

)

Definition at line 149 of file cabac.c.

Referenced by decode_slice(), and main().

static void put_cabac_bit	(	CABACContext *	c,
		int	b
	)			[inline, static]

Definition at line 68 of file cabac.h.

Referenced by put_cabac_bypass(), put_cabac_terminate(), and renorm_cabac_encoder().

static void renorm_cabac_encoder

(

CABACContext *

c

)

[inline, static]

Definition at line 75 of file cabac.h.

Referenced by put_cabac(), put_cabac_static(), and put_cabac_terminate().

static void put_cabac	(	CABACContext *	c,
		uint8_t *const	state,
		int	bit
	)			[static]

Definition at line 94 of file cabac.h.

Referenced by main(), put_cabac_u(), and put_cabac_ueg().

static void put_cabac_static	(	CABACContext *	c,
		int	RangeLPS,
		int	bit
	)			[static]

Definition at line 113 of file cabac.h.

static void put_cabac_bypass	(	CABACContext *	c,
		int	bit
	)			[static]

Parameters:

bit

0 -> write zero bit, !=0 write one bit

Definition at line 133 of file cabac.h.

Referenced by main(), and put_cabac_ueg().

static int put_cabac_terminate	(	CABACContext *	c,
		int	bit
	)			[static]

Returns:

the number of bytes written

Definition at line 159 of file cabac.h.

Referenced by main().

static void put_cabac_u	(	CABACContext *	c,
		uint8_t *	state,
		int	v,
		int	max,
		int	max_index,
		int	truncated
	)			[static]

put (truncated) unary binarization.

Definition at line 187 of file cabac.h.

Referenced by main().

static void put_cabac_ueg	(	CABACContext *	c,
		uint8_t *	state,
		int	v,
		int	max,
		int	is_signed,
		int	k,
		int	max_index
	)			[static]

put unary exp golomb k-th order binarization.

Definition at line 222 of file cabac.h.

Referenced by main().

static void refill

(

CABACContext *

c

)

[static]

Definition at line 265 of file cabac.h.

Referenced by get_cabac_bypass(), get_cabac_bypass_sign(), get_rac(), renorm_cabac_decoder(), and renorm_cabac_decoder_once().

static void refill2

(

CABACContext *

c

)

[static]

Definition at line 276 of file cabac.h.

Referenced by get_cabac_inline().

static void renorm_cabac_decoder

(

CABACContext *

c

)

[inline, static]

Definition at line 295 of file cabac.h.

static void renorm_cabac_decoder_once

(

CABACContext *

c

)

[inline, static]

Definition at line 304 of file cabac.h.

Referenced by get_cabac_inline(), and get_cabac_terminate().

static av_always_inline int get_cabac_inline	(	CABACContext *	c,
		uint8_t *const	state
	)			[static]

Definition at line 373 of file cabac.h.

Referenced by get_cabac(), and get_cabac_noinline().

static int av_noinline get_cabac_noinline	(	CABACContext *	c,
		uint8_t *const	state
	)			[static]

Definition at line 585 of file cabac.h.

Referenced by decode_cabac_field_decoding_flag(), decode_cabac_intra_mb_type(), decode_cabac_mb_cbp_chroma(), decode_cabac_mb_cbp_luma(), decode_cabac_mb_chroma_pre_mode(), decode_cabac_mb_dqp(), decode_cabac_mb_skip(), decode_cabac_mb_transform_size(), and decode_cabac_mb_type().

static int get_cabac	(	CABACContext *	c,
		uint8_t *const	state
	)			[static]

Definition at line 589 of file cabac.h.

Referenced by decode_cabac_b_mb_sub_type(), decode_cabac_mb_intra4x4_pred_mode(), decode_cabac_mb_mvd(), decode_cabac_mb_ref(), decode_cabac_p_mb_sub_type(), decode_cabac_residual_internal(), get_cabac_u(), get_cabac_ueg(), and main().

static int get_cabac_bypass

(

CABACContext *

c

)

[static]

Definition at line 593 of file cabac.h.

Referenced by decode_cabac_mb_mvd(), decode_cabac_residual_internal(), get_cabac_ueg(), and main().

static av_always_inline int get_cabac_bypass_sign	(	CABACContext *	c,
		int	val
	)			[static]

Definition at line 641 of file cabac.h.

Referenced by decode_cabac_mb_mvd(), and decode_cabac_residual_internal().

static int get_cabac_terminate

(

CABACContext *

c

)

[static]

Returns:

the number of bytes read or 0 if no end

Definition at line 692 of file cabac.h.

Referenced by decode_cabac_intra_mb_type(), decode_slice(), and main().

static int get_cabac_u	(	CABACContext *	c,
		uint8_t *	state,
		int	max,
		int	max_index,
		int	truncated
	)			[static]

Get (truncated) unary binarization.

Definition at line 706 of file cabac.h.

Referenced by main().

static int get_cabac_ueg	(	CABACContext *	c,
		uint8_t *	state,
		int	max,
		int	is_signed,
		int	k,
		int	max_index
	)			[static]

get unary exp golomb k-th order binarization.

Definition at line 722 of file cabac.h.

Referenced by main().

---

Variable Documentation

uint8_t ff_h264_mlps_state[4 *64]

Definition at line 52 of file cabac.c.

Referenced by ff_init_cabac_states(), and get_cabac_inline().

uint8_t ff_h264_lps_range[4 *2 *64]

rangeTabLPS

Definition at line 53 of file cabac.c.

Referenced by ff_init_cabac_states(), get_cabac_inline(), main(), and put_cabac().

uint8_t ff_h264_mps_state[2 *64]

transIdxMPS

Definition at line 55 of file cabac.c.

Referenced by ff_init_cabac_states(), get_cabac_inline(), main(), and put_cabac().

uint8_t ff_h264_lps_state[2 *64]

transIdxLPS

Definition at line 54 of file cabac.c.

Referenced by ff_init_cabac_states(), get_cabac_inline(), main(), and put_cabac().

const uint8_t ff_h264_norm_shift[512]

Definition at line 90 of file cabac.c.

Referenced by get_cabac_inline(), and refill2().