biariencode.h File Reference

Headerfile for binary arithmetic encoding routines. More...

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Defines
#define	B_BITS   10
#define	BITS_TO_LOAD   16
#define	MAX_BITS   26
#define	ONE   0x04000000
#define	ONE_M1   0x03FFFFFF
#define	HALF   0x0200
#define	QUARTER   0x0100
#define	MIN_BITS_TO_GO   0
#define	B_LOAD_MASK   0xFFFF
Functions
int	get_pic_bin_count (void)
void	reset_pic_bin_count (void)
void	set_pic_bin_count (EncodingEnvironmentPtr eep)
void	arienco_start_encoding (EncodingEnvironmentPtr eep, unsigned char *code_buffer, int *code_len)
void	arienco_reset_EC (EncodingEnvironmentPtr eep)
void	arienco_done_encoding (EncodingEnvironmentPtr eep)
void	biari_init_context (BiContextTypePtr ctx, const char *ini)
void	rescale_cum_freq (BiContextTypePtr bi_ct)
void	biari_encode_symbol (EncodingEnvironmentPtr eep, signed short symbol, BiContextTypePtr bi_ct)
void	biari_encode_symbol_eq_prob (EncodingEnvironmentPtr eep, signed short symbol)
void	biari_encode_symbol_final (EncodingEnvironmentPtr eep, signed short symbol)
static int	arienco_bits_written (EncodingEnvironmentPtr eep)

---

Detailed Description

Headerfile for binary arithmetic encoding routines.

biariencode.h

Author:

• Detlev Marpe
• Gabi Blaettermann
• Gunnar Marten

Copyright (C) 2000 HEINRICH HERTZ INSTITUTE All Rights Reserved.

Date:

21. Oct 2000

Definition in file biariencode.h.

---

Function Documentation

static int arienco_bits_written

(

EncodingEnvironmentPtr

eep

)

[inline, static]

Returns the number of currently written bits.

Definition at line 63 of file biariencode.h.

References EncodingEnvironment::Ebits_to_go, EncodingEnvironment::Echunks_outstanding, EncodingEnvironment::Ecodestrm_len, and EncodingEnvironment::Epbuf.

Referenced by RDCost_for_8x8blocks(), slice_too_big(), writeB8_typeInfo_CABAC(), writeCBP_CABAC(), writeCIPredMode_CABAC(), writeDquant_CABAC(), writeFieldModeInfo_CABAC(), writeIntraPredMode_CABAC(), writeMB_skip_flagInfo_CABAC(), writeMB_transform_size_CABAC(), writeMB_typeInfo_CABAC(), writeMBLayer(), writeMVD_CABAC(), writeRefFrame_CABAC(), and writeRunLevel_CABAC().

void arienco_done_encoding

(

EncodingEnvironmentPtr

eep

)

Terminates the arithmetic codeword, writes stop bit and stuffing bytes (if any).

Definition at line 292 of file biariencode.c.

References macroblock::bitcounter, ImageParameters::current_mb_nr, EncodingEnvironment::Ebits_to_go, EncodingEnvironment::Elow, ImageParameters::mb_data, and put_one_byte_final().

Referenced by terminate_slice(), and writeMBLayer().

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void arienco_reset_EC

(

EncodingEnvironmentPtr

eep

)

Initializes the EncodingEnvironment E and C values to zero.

Definition at line 245 of file biariencode.c.

References EncodingEnvironment::C, and EncodingEnvironment::E.

Referenced by start_slice().

void arienco_start_encoding	(	EncodingEnvironmentPtr	eep,
		unsigned char *	code_buffer,
		int *	code_len
	)

Initializes the EncodingEnvironment for the arithmetic coder.

Definition at line 257 of file biariencode.c.

References EncodingEnvironment::Ebits_to_go, EncodingEnvironment::Ebuffer, EncodingEnvironment::Echunks_outstanding, EncodingEnvironment::Ecodestrm, EncodingEnvironment::Ecodestrm_len, EncodingEnvironment::Elow, EncodingEnvironment::Epbuf, and EncodingEnvironment::Erange.

Referenced by start_slice(), and writeMBLayer().

void biari_encode_symbol	(	EncodingEnvironmentPtr	eep,
		signed short	symbol,
		BiContextTypePtr	bi_ct
	)

Actually arithmetic encoding of one binary symbol by using the probability estimate of its associated context model.

Definition at line 360 of file biariencode.c.

References EncodingEnvironment::C, BiContextType::count, EncodingEnvironment::Ebits_to_go, EncodingEnvironment::Echunks_outstanding, EncodingEnvironment::Elow, EncodingEnvironment::Erange, BiContextType::MPS, and BiContextType::state.

Referenced by unary_bin_encode(), unary_bin_max_encode(), unary_exp_golomb_level_encode(), unary_exp_golomb_mv_encode(), write_and_store_CBP_block_bit(), write_significance_map(), write_significant_coefficients(), writeB8_typeInfo_CABAC(), writeCBP_BIT_CABAC(), writeCBP_CABAC(), writeCIPredMode_CABAC(), writeDquant_CABAC(), writeFieldModeInfo_CABAC(), writeIntraPredMode_CABAC(), writeMB_skip_flagInfo_CABAC(), writeMB_transform_size_CABAC(), writeMB_typeInfo_CABAC(), writeMVD_CABAC(), and writeRefFrame_CABAC().

void biari_encode_symbol_eq_prob	(	EncodingEnvironmentPtr	eep,
		signed short	symbol
	)

Arithmetic encoding of one binary symbol assuming a fixed prob. distribution with p(symbol) = 0.5.

Definition at line 448 of file biariencode.c.

References EncodingEnvironment::C, EncodingEnvironment::Ebits_to_go, EncodingEnvironment::Echunks_outstanding, EncodingEnvironment::Elow, and EncodingEnvironment::Erange.

Referenced by exp_golomb_encode_eq_prob(), write_significant_coefficients(), and writeMVD_CABAC().

void biari_encode_symbol_final	(	EncodingEnvironmentPtr	eep,
		signed short	symbol
	)

Arithmetic encoding for last symbol before termination.

Definition at line 491 of file biariencode.c.

References EncodingEnvironment::C, EncodingEnvironment::Ebits_to_go, EncodingEnvironment::Echunks_outstanding, EncodingEnvironment::Elow, and EncodingEnvironment::Erange.

Referenced by writeMB_typeInfo_CABAC().

void biari_init_context	(	BiContextTypePtr	ctx,
		const char *	ini
	)

Initializes a given context with some pre-defined probability state.

Definition at line 564 of file biariencode.c.

References BiContextType::count, ImageParameters::currentSlice, BiContextType::MPS, Slice::qp, and BiContextType::state.

void set_pic_bin_count

(

EncodingEnvironmentPtr

eep

)

add slice bin number to picture bin counter should be only used when slice is terminated

Definition at line 281 of file biariencode.c.

References EncodingEnvironment::C, and EncodingEnvironment::E.

Referenced by terminate_slice().