intra.c File Reference

#include "intra.h"
#include <stdlib.h>
#include "image.h"
#include "kvz_math.h"
#include "strategies/strategies-intra.h"
#include "tables.h"
#include "transform.h"
#include "videoframe.h"

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Functions
int8_t	kvz_intra_get_dir_luma_predictor (const uint32_t x, const uint32_t y, int8_t *preds, const cu_info_t *const cur_pu, const cu_info_t *const left_pu, const cu_info_t *const above_pu)
	Function for deriving intra luma predictions.
static void	intra_filter_reference (int_fast8_t log2_width, kvz_intra_references *refs)
static void	intra_post_process_angular (unsigned width, unsigned stride, const kvz_pixel *ref, kvz_pixel *block)
static void	intra_pred_dc (const int_fast8_t log2_width, const kvz_pixel *const ref_top, const kvz_pixel *const ref_left, kvz_pixel *const out_block)
	Generage planar prediction.
void	kvz_intra_predict (kvz_intra_references *refs, int_fast8_t log2_width, int_fast8_t mode, color_t color, kvz_pixel *dst, bool filter_boundary)
	Generate intra predictions.
void	kvz_intra_build_reference_any (const int_fast8_t log2_width, const color_t color, const vector2d_t *const luma_px, const vector2d_t *const pic_px, const lcu_t *const lcu, kvz_intra_references *const refs)
void	kvz_intra_build_reference_inner (const int_fast8_t log2_width, const color_t color, const vector2d_t *const luma_px, const vector2d_t *const pic_px, const lcu_t *const lcu, kvz_intra_references *const refs)
void	kvz_intra_build_reference (const int_fast8_t log2_width, const color_t color, const vector2d_t *const luma_px, const vector2d_t *const pic_px, const lcu_t *const lcu, kvz_intra_references *const refs)
	Generage angular predictions.
static void	intra_recon_tb_leaf (encoder_state_t *const state, int x, int y, int depth, int8_t intra_mode, lcu_t *lcu, color_t color)
void	kvz_intra_recon_cu (encoder_state_t *const state, int x, int y, int depth, int8_t mode_luma, int8_t mode_chroma, cu_info_t *cur_cu, lcu_t *lcu)
	Reconstruct an intra CU.

Variables
static const uint8_t	num_ref_pixels_top [16][16]
static const uint8_t	num_ref_pixels_left [16][16]

Function Documentation

intra_filter_reference()

static void intra_filter_reference ( int_fast8_t  log2_width, kvz_intra_references *  refs  )

static

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intra_post_process_angular()

static void intra_post_process_angular ( unsigned  width, unsigned  stride, const kvz_pixel *  ref, kvz_pixel *  block  )

static

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intra_pred_dc()

static void intra_pred_dc ( const int_fast8_t  log2_width, const kvz_pixel *const  ref_top, const kvz_pixel *const  ref_left, kvz_pixel *const  out_block  )

static

Parameters

log2_width	Log2 of width, range 2..5.
in_ref_above	Pointer to -1 index of above reference, length=width*2+1.
in_ref_left	Pointer to -1 index of left reference, length=width*2+1.
dst	Buffer of size width*width.

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intra_recon_tb_leaf()

static void intra_recon_tb_leaf ( encoder_state_t *const  state, int  x, int  y, int  depth, int8_t  intra_mode, lcu_t *  lcu, color_t  color  )

static

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kvz_intra_build_reference()

void kvz_intra_build_reference	(	const int_fast8_t	log2_width,
		const color_t	color,
		const vector2d_t *const	luma_px,
		const vector2d_t *const	pic_px,
		const lcu_t *const	lcu,
		kvz_intra_references *const	refs
	)

Parameters

width	Width in pixels, range 4..32.
color	What color pixels to use.
luma_px	Luma coordinates of the prediction block.
pic_px	Picture dimensions in luma pixels.
lcu	LCU struct.
out_left_ref	Left reference pixels, index 0 is the top-left.
out_top_ref	Top reference pixels, index 0 is the top-left.

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kvz_intra_build_reference_any()

void kvz_intra_build_reference_any	(	const int_fast8_t	log2_width,
		const color_t	color,
		const vector2d_t *const	luma_px,
		const vector2d_t *const	pic_px,
		const lcu_t *const	lcu,
		kvz_intra_references *const	refs
	)

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kvz_intra_build_reference_inner()

void kvz_intra_build_reference_inner	(	const int_fast8_t	log2_width,
		const color_t	color,
		const vector2d_t *const	luma_px,
		const vector2d_t *const	pic_px,
		const lcu_t *const	lcu,
		kvz_intra_references *const	refs
	)

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kvz_intra_get_dir_luma_predictor()

int8_t kvz_intra_get_dir_luma_predictor	(	const uint32_t	x,
		const uint32_t	y,
		int8_t *	preds,
		const cu_info_t *const	cur_pu,
		const cu_info_t *const	left_pu,
		const cu_info_t *const	above_pu
	)

Parameters

x	x-coordinate of the PU in pixels
y	y-coordinate of the PU in pixels
preds	output buffer for 3 predictions
cur_pu	PU to check
left_pu	PU to the left of cur_pu
above_pu	PU above cur_pu

Returns

1 if predictions are found, otherwise 0

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kvz_intra_predict()

void kvz_intra_predict	(	kvz_intra_references *	refs,
		int_fast8_t	log2_width,
		int_fast8_t	mode,
		color_t	color,
		kvz_pixel *	dst,
		bool	filter_boundary
	)

Parameters

refs	Reference pixels used for the prediction.
log2_width	Width of the predicted block.
mode	Intra mode used for the prediction.
color	Color of the prediction.
dst	Buffer for the predicted pixels.
filter_boundary	Whether to filter the boundary on modes 10 and 26.

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kvz_intra_recon_cu()

void kvz_intra_recon_cu	(	encoder_state_t *const	state,
		int	x,
		int	y,
		int	depth,
		int8_t	mode_luma,
		int8_t	mode_chroma,
		cu_info_t *	cur_cu,
		lcu_t *	lcu
	)

Parameters

state	encoder state
x	x-coordinate of the CU in luma pixels
y	y-coordinate of the CU in luma pixels
depth	depth in the CU tree
mode_luma	intra mode for luma, or -1 to skip luma recon
mode_chroma	intra mode for chroma, or -1 to skip chroma recon
cur_cu	pointer to the CU, or NULL to fetch CU from LCU
lcu	containing LCU

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Variable Documentation

num_ref_pixels_left

const uint8_t num_ref_pixels_left[16][16]

static

Initial value:

= {
  { 64,  4,  8,  4, 16,  4,  8,  4, 32,  4,  8,  4, 16,  4,  8,  4 },
  { 60,  4,  4,  4, 12,  4,  4,  4, 28,  4,  4,  4, 12,  4,  4,  4 },
  { 56,  4,  8,  4,  8,  4,  8,  4, 24,  4,  8,  4,  8,  4,  8,  4 },
  { 52,  4,  4,  4,  4,  4,  4,  4, 20,  4,  4,  4,  4,  4,  4,  4 },
  { 48,  4,  8,  4, 16,  4,  8,  4, 16,  4,  8,  4, 16,  4,  8,  4 },
  { 44,  4,  4,  4, 12,  4,  4,  4, 12,  4,  4,  4, 12,  4,  4,  4 },
  { 40,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 36,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4 },
  { 32,  4,  8,  4, 16,  4,  8,  4, 32,  4,  8,  4, 16,  4,  8,  4 },
  { 28,  4,  4,  4, 12,  4,  4,  4, 28,  4,  4,  4, 12,  4,  4,  4 },
  { 24,  4,  8,  4,  8,  4,  8,  4, 24,  4,  8,  4,  8,  4,  8,  4 },
  { 20,  4,  4,  4,  4,  4,  4,  4, 20,  4,  4,  4,  4,  4,  4,  4 },
  { 16,  4,  8,  4, 16,  4,  8,  4, 16,  4,  8,  4, 16,  4,  8,  4 },
  { 12,  4,  4,  4, 12,  4,  4,  4, 12,  4,  4,  4, 12,  4,  4,  4 },
  { 8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4 }
}

num_ref_pixels_top

const uint8_t num_ref_pixels_top[16][16]

static

Initial value:

= {
  { 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 32, 28, 24, 20, 16, 12,  8,  4, 32, 28, 24, 20, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 64, 60, 56, 52, 48, 44, 40, 36, 32, 28, 24, 20, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 32, 28, 24, 20, 16, 12,  8,  4, 32, 28, 24, 20, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 },
  { 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4, 16, 12,  8,  4 },
  {  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4,  8,  4 }
}