quant.h File Reference

definitions for quantization functions More...

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Defines
#define	Q_BITS   15
#define	DQ_BITS   6
#define	Q_BITS_8   16
#define	DQ_BITS_8   6
Functions
void	init_qp_process (ImageParameters *img)
void	free_qp_matrices (void)
void	AssignQuantParam (pic_parameter_set_rbsp_t *pps, seq_parameter_set_rbsp_t *sps)
void	CalculateQuantParam (void)
void	CalculateQuant8Param (void)
Variables
const int	dequant_coef [6][4][4]
const int	quant_coef [6][4][4]
int	InvLevelScale4x4_Intra [3][6][4][4]
int	InvLevelScale4x4_Inter [3][6][4][4]
int	InvLevelScale8x8_Intra [3][6][8][8]
int	InvLevelScale8x8_Inter [3][6][8][8]
int *	qmatrix [12]
const int	A [4][4]
int *	qp_per_matrix
int *	qp_rem_matrix

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Detailed Description

definitions for quantization functions

Author:

Definition in file quant.h.

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Function Documentation

void AssignQuantParam	(	pic_parameter_set_rbsp_t *	pps,
		seq_parameter_set_rbsp_t *	sps
	)

For mapping the q-matrix to the active id and calculate quantisation values.

Parameters:

	pps	Picture parameter set
	sps	Sequence parameter set

Definition at line 277 of file quant.c.

References CalculateQuant8Param(), CalculateQuantParam(), and YUV444.

Referenced by read_new_slice().

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void CalculateQuant8Param

(

void

)

Calculate the quantisation and inverse quantisation parameters.

Definition at line 435 of file quant.c.

Referenced by AssignQuantParam().

void CalculateQuantParam

(

void

)

For calculating the quantisation values at frame level.

Definition at line 405 of file quant.c.

References dequant_coef.

Referenced by AssignQuantParam().

void init_qp_process

(

ImageParameters *

img

)

Initiate quantization process arrays.

Definition at line 234 of file quant.c.

References no_mem_exit().

Referenced by init_frext().

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Variable Documentation

const int dequant_coef[6][4][4]

Dequantization coefficients.

Definition at line 91 of file quant.c.

Referenced by CalculateQuantParam(), and itrans_sp().