Arithmetic decoder for Dirac. More...

#include "dirac_arith.h"

Functions
av_cold void	ff_dirac_init_arith_tables (void)

void	ff_dirac_init_arith_decoder (DiracArith c, GetBitContext gb, int length)

Variables
const uint16_t	ff_dirac_prob [256]

const uint8_t	ff_dirac_next_ctx [DIRAC_CTX_COUNT]

int16_t	ff_dirac_prob_branchless [256][2]

Detailed Description

Arithmetic decoder for Dirac.

Author: Marco Gerards marco.nosp@m.@gnu.nosp@m..org

Definition in file dirac_arith.c.

Function Documentation

◆ ff_dirac_init_arith_tables()

av_cold void ff_dirac_init_arith_tables ( void )

Definition at line 86 of file dirac_arith.c.

Referenced by dirac_decode_init(), and dirac_get_arith_int().

◆ ff_dirac_init_arith_decoder()

void ff_dirac_init_arith_decoder	(	DiracArith *	c,
		GetBitContext *	gb,
		int	length
	)

Definition at line 96 of file dirac_arith.c.

Referenced by decode_subband_internal(), dirac_get_arith_int(), and dirac_unpack_block_motion_data().

Variable Documentation

◆ ff_dirac_prob

const uint16_t ff_dirac_prob[256]

Definition at line 31 of file dirac_arith.c.

Referenced by ff_dirac_init_arith_tables().

◆ ff_dirac_next_ctx

const uint8_t ff_dirac_next_ctx[DIRAC_CTX_COUNT]

Initial value:

= {
    [CTX_ZPZN_F1]   = CTX_ZP_F2,
    [CTX_ZPNN_F1]   = CTX_ZP_F2,
    [CTX_ZP_F2]     = CTX_ZP_F3,
    [CTX_ZP_F3]     = CTX_ZP_F4,
    [CTX_ZP_F4]     = CTX_ZP_F5,
    [CTX_ZP_F5]     = CTX_ZP_F6,
    [CTX_ZP_F6]     = CTX_ZP_F6,
    [CTX_NPZN_F1]   = CTX_NP_F2,
    [CTX_NPNN_F1]   = CTX_NP_F2,
    [CTX_NP_F2]     = CTX_NP_F3,
    [CTX_NP_F3]     = CTX_NP_F4,
    [CTX_NP_F4]     = CTX_NP_F5,
    [CTX_NP_F5]     = CTX_NP_F6,
    [CTX_NP_F6]     = CTX_NP_F6,
    [CTX_DELTA_Q_F] = CTX_DELTA_Q_F,
}

Definition at line 66 of file dirac_arith.c.

Referenced by dirac_get_arith_uint().

◆ ff_dirac_prob_branchless

int16_t ff_dirac_prob_branchless[256][2]

Definition at line 84 of file dirac_arith.c.

Referenced by dirac_get_arith_bit(), and ff_dirac_init_arith_tables().

Functions

Variables