biaridecod.h File Reference

Headerfile for binary arithmetic decoder routines. More...

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
void	arideco_start_decoding (DecodingEnvironmentPtr eep, unsigned char *code_buffer, int firstbyte, int *code_len)
int	arideco_bits_read (DecodingEnvironmentPtr dep)
void	arideco_done_decoding (DecodingEnvironmentPtr dep)
void	biari_init_context (int qp, BiContextTypePtr ctx, const char *ini)
void	rescale_cum_freq (BiContextTypePtr bi_ct)
unsigned int	biari_decode_symbol (DecodingEnvironmentPtr dep, BiContextTypePtr bi_ct)
unsigned int	biari_decode_symbol_eq_prob (DecodingEnvironmentPtr dep)
unsigned int	biari_decode_final (DecodingEnvironmentPtr dep)
unsigned int	getbyte (DecodingEnvironmentPtr dep)
unsigned int	getword (DecodingEnvironmentPtr dep)

---

Detailed Description

Headerfile for binary arithmetic decoder routines.

biaridecod.h

Author:

Detlev Marpe, Gabi Blättermann Copyright (C) 2000 HEINRICH HERTZ INSTITUTE All Rights Reserved.

Date:

21. Oct 2000

Definition in file biaridecod.h.

---

Function Documentation

int arideco_bits_read

(

DecodingEnvironmentPtr

dep

)

arideco_bits_read

Definition at line 247 of file biaridecod.c.

References DecodingEnvironment::DbitsLeft, and DecodingEnvironment::Dcodestrm_len.

Referenced by readSyntaxElement_CABAC().

void arideco_done_decoding

(

DecodingEnvironmentPtr

dep

)

finalize arithetic decoding():

Definition at line 177 of file biaridecod.c.

References DecodingEnvironment::Dcodestrm_len.

void arideco_start_decoding	(	DecodingEnvironmentPtr	eep,
		unsigned char *	code_buffer,
		int	firstbyte,
		int *	code_len
	)

Initializes the DecodingEnvironment for the arithmetic coder.

Definition at line 221 of file biaridecod.c.

References DecodingEnvironment::DbitsLeft, DecodingEnvironment::Dcodestrm, DecodingEnvironment::Dcodestrm_len, DecodingEnvironment::Drange, DecodingEnvironment::Dvalue, getbyte(), and getword().

Referenced by init_decoding_engine_IPCM(), and read_new_slice().

Here is the call graph for this function:

unsigned int biari_decode_final

(

DecodingEnvironmentPtr

dep

)

biari_decode_symbol_final():

Returns:

the decoded symbol

Definition at line 361 of file biaridecod.c.

References DecodingEnvironment::DbitsLeft, DecodingEnvironment::Drange, DecodingEnvironment::Dvalue, and getword().

Referenced by cabac_startcode_follows(), and readMB_typeInfo_CABAC().

Here is the call graph for this function:

unsigned int biari_decode_symbol	(	DecodingEnvironmentPtr	dep,
		BiContextTypePtr	bi_ct
	)

biari_decode_symbol():

Returns:

the decoded symbol

Definition at line 266 of file biaridecod.c.

References DecodingEnvironment::DbitsLeft, DecodingEnvironment::Drange, DecodingEnvironment::Dvalue, getword(), BiContextType::MPS, and BiContextType::state.

Referenced by read_and_store_CBP_block_bit(), read_significance_map(), read_significant_coefficients(), readB8_typeInfo_CABAC(), readCBP_CABAC(), readCIPredMode_CABAC(), readDquant_CABAC(), readIntraPredMode_CABAC(), readMB_skip_flagInfo_CABAC(), readMB_transform_size_flag_CABAC(), readMB_typeInfo_CABAC(), readMVD_CABAC(), readRefFrame_CABAC(), unary_bin_decode(), unary_bin_max_decode(), unary_exp_golomb_level_decode(), and unary_exp_golomb_mv_decode().

Here is the call graph for this function:

unsigned int biari_decode_symbol_eq_prob

(

DecodingEnvironmentPtr

dep

)

biari_decode_symbol_eq_prob():

Returns:

the decoded symbol

Definition at line 328 of file biaridecod.c.

References DecodingEnvironment::DbitsLeft, DecodingEnvironment::Drange, DecodingEnvironment::Dvalue, and getword().

Referenced by exp_golomb_decode_eq_prob(), read_significant_coefficients(), and readMVD_CABAC().

Here is the call graph for this function:

void biari_init_context	(	int	qp,
		BiContextTypePtr	ctx,
		const char *	ini
	)

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

Definition at line 400 of file biaridecod.c.

References BiContextType::MPS, and BiContextType::state.

unsigned int getbyte

(

DecodingEnvironmentPtr

dep

)

read one byte from the bitstream

Definition at line 191 of file biaridecod.c.

References DecodingEnvironment::Dcodestrm, and DecodingEnvironment::Dcodestrm_len.

Referenced by arideco_start_decoding().

unsigned int getword

(

DecodingEnvironmentPtr

dep

)

read two bytes from the bitstream

Definition at line 205 of file biaridecod.c.

References DecodingEnvironment::Dcodestrm, and DecodingEnvironment::Dcodestrm_len.

Referenced by arideco_start_decoding(), biari_decode_final(), biari_decode_symbol(), and biari_decode_symbol_eq_prob().