transform.h File Reference

Quantization and transform functions. More...

#include "cu.h"
#include "encoder.h"
#include "encoderstate.h"
#include "global.h"

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Functions
void	kvz_transformskip (const encoder_control_t *encoder, int16_t *block, int16_t *coeff, int8_t block_size)
	NxN inverse transform (2D)
void	kvz_itransformskip (const encoder_control_t *encoder, int16_t *block, int16_t *coeff, int8_t block_size)
	inverse transform skip
void	kvz_transform2d (const encoder_control_t *const encoder, int16_t *block, int16_t *coeff, int8_t block_size, color_t color, cu_type_t type)
	forward transform (2D)
void	kvz_itransform2d (const encoder_control_t *const encoder, int16_t *block, int16_t *coeff, int8_t block_size, color_t color, cu_type_t type)
int32_t	kvz_get_scaled_qp (int8_t type, int8_t qp, int8_t qp_offset)
	Get scaled QP used in quantization.
void	kvz_quantize_lcu_residual (encoder_state_t *state, bool luma, bool chroma, int32_t x, int32_t y, uint8_t depth, cu_info_t *cur_cu, lcu_t *lcu, bool early_skip)
	This function calculates the residual coefficients for a region of the LCU (defined by x, y and depth) and updates the reconstruction with the kvantized residual.

Variables
const uint8_t	kvz_g_chroma_scale [58]
const int16_t	kvz_g_inv_quant_scales [6]

Function Documentation

kvz_get_scaled_qp()

int32_t kvz_get_scaled_qp	(	int8_t	type,
		int8_t	qp,
		int8_t	qp_offset
	)

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kvz_itransform2d()

void kvz_itransform2d	(	const encoder_control_t *const	encoder,
		int16_t *	block,
		int16_t *	coeff,
		int8_t	block_size,
		color_t	color,
		cu_type_t	type
	)

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kvz_itransformskip()

void kvz_itransformskip	(	const encoder_control_t *const	encoder,
		int16_t *	block,
		int16_t *	coeff,
		int8_t	block_size
	)

Parameters

coeff	input data (transform coefficients)
block	output data (residual)
block_size	width of transform

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kvz_quantize_lcu_residual()

void kvz_quantize_lcu_residual	(	encoder_state_t *const	state,
		const bool	luma,
		const bool	chroma,
		const int32_t	x,
		const int32_t	y,
		const uint8_t	depth,
		cu_info_t *	cur_pu,
		lcu_t *	lcu,
		bool	early_skip
	)

Processes the TU tree recursively.

Inputs are:

• lcu->rec pixels after prediction for the area
• lcu->ref reference pixels for the area
• lcu->cu for the area
• early_skip if this is used for early skip, bypass IT and IQ

Outputs are:

• lcu->rec reconstruction after quantized residual
• lcu->coeff quantized coefficients for the area
• lcu->cbf coded block flags for the area
• lcu->cu.intra.tr_skip tr skip flags for the area (in case of luma)

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kvz_transform2d()

void kvz_transform2d	(	const encoder_control_t *const	encoder,
		int16_t *	block,
		int16_t *	coeff,
		int8_t	block_size,
		color_t	color,
		cu_type_t	type
	)

Parameters

block	input residual
coeff	transform coefficients
block_size	width of transform

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kvz_transformskip()

void kvz_transformskip	(	const encoder_control_t *const	encoder,
		int16_t *	block,
		int16_t *	coeff,
		int8_t	block_size
	)

Parameters

coeff	input data (transform coefficients)
block	output data (residual)
block_size	input data (width of transform)

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Variable Documentation

kvz_g_chroma_scale

const uint8_t kvz_g_chroma_scale[58]

extern

kvz_g_inv_quant_scales

const int16_t kvz_g_inv_quant_scales[6]

extern