lut3d.c File Reference

#include <assert.h>
#include <string.h>
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "cms.h"
#include "csputils.h"
#include "lut3d.h"

Go to the source code of this file.

Functions
SwsLut3D *	ff_sws_lut3d_alloc (void)
void	ff_sws_lut3d_free (SwsLut3D **plut3d)
bool	ff_sws_lut3d_test_fmt (enum AVPixelFormat fmt, int output)
	Test to see if a given format is supported by the 3DLUT input/output code. More...
enum AVPixelFormat	ff_sws_lut3d_pick_pixfmt (SwsFormat fmt, int output)
	Pick the best compatible pixfmt for a given SwsFormat. More...
static av_always_inline v3u16_t	barycentric (int shift, int x, int y, int z, v3u16_t v0, v3u16_t v1, v3u16_t v2, v3u16_t v3)
	v0 and v1 are 'black' and 'white' v2 and v3 are closest RGB/CMY vertices x >= y >= z are relative weights More...
static av_always_inline v3u16_t	tetrahedral (const SwsLut3D *lut3d, int Rx, int Gx, int Bx, int Rf, int Gf, int Bf)
static av_always_inline v3u16_t	lookup_input16 (const SwsLut3D *lut3d, v3u16_t rgb)
static av_always_inline v2u16_t	lerp2u16 (v2u16_t a, v2u16_t b, int x, int shift)
	Note: These functions are scaled such that x == (1 << shift) corresponds to a value of 1.0. More...
static av_always_inline v3u16_t	lerp3u16 (v3u16_t a, v3u16_t b, int x, int shift)
static av_always_inline v3u16_t	lookup_output (const SwsLut3D *lut3d, v3u16_t ipt)
static av_always_inline v3u16_t	apply_tone_map (const SwsLut3D *lut3d, v3u16_t ipt)
int	ff_sws_lut3d_generate (SwsLut3D *lut3d, enum AVPixelFormat fmt_in, enum AVPixelFormat fmt_out, const SwsColorMap *map)
	Recalculate the (static) 3DLUT state with new settings. More...
void	ff_sws_lut3d_update (SwsLut3D *lut3d, const SwsColor *new_src)
	Update the tone mapping state. More...
void	ff_sws_lut3d_apply (const SwsLut3D *lut3d, const uint8_t *in, int in_stride, uint8_t *out, int out_stride, int w, int h)
	Applies a color transformation to a plane. More...

Function Documentation

ff_sws_lut3d_alloc()

SwsLut3D* ff_sws_lut3d_alloc

(

void

)

Definition at line 32 of file lut3d.c.

Referenced by adapt_colors().

ff_sws_lut3d_free()

void ff_sws_lut3d_free

(

SwsLut3D **

plut3d

)

Definition at line 42 of file lut3d.c.

Referenced by adapt_colors(), and free_lut3d().

ff_sws_lut3d_test_fmt()

bool ff_sws_lut3d_test_fmt	(	enum AVPixelFormat	fmt,
		int	output
	)

Test to see if a given format is supported by the 3DLUT input/output code.

Definition at line 47 of file lut3d.c.

Referenced by ff_sws_lut3d_generate().

ff_sws_lut3d_pick_pixfmt()

enum AVPixelFormat ff_sws_lut3d_pick_pixfmt	(	SwsFormat	fmt,
		int	output
	)

Pick the best compatible pixfmt for a given SwsFormat.

Definition at line 52 of file lut3d.c.

Referenced by adapt_colors().

barycentric()

static av_always_inline v3u16_t barycentric ( int  shift, int  x, int  y, int  z, v3u16_t  v0, v3u16_t  v1, v3u16_t  v2, v3u16_t  v3  )

static

v0 and v1 are 'black' and 'white' v2 and v3 are closest RGB/CMY vertices x >= y >= z are relative weights

Definition at line 63 of file lut3d.c.

Referenced by tetrahedral().

tetrahedral()

static av_always_inline v3u16_t tetrahedral ( const SwsLut3D *  lut3d, int  Rx, int  Gx, int  Bx, int  Rf, int  Gf, int  Bf  )

static

Definition at line 81 of file lut3d.c.

Referenced by lookup_input16().

lookup_input16()

static av_always_inline v3u16_t lookup_input16 ( const SwsLut3D *  lut3d, v3u16_t  rgb  )

static

Definition at line 122 of file lut3d.c.

Referenced by ff_sws_lut3d_apply().

lerp2u16()

static av_always_inline v2u16_t lerp2u16 ( v2u16_t  a, v2u16_t  b, int  x, int  shift  )

static

Note: These functions are scaled such that x == (1 << shift) corresponds to a value of 1.0.

This makes them suitable for use when interpolation LUT entries with a fractional part that is just masked away from the index, since a fractional coordinate of e.g. 0xFFFF corresponds to a mix weight of just slightly less than 1.0.

Definition at line 141 of file lut3d.c.

Referenced by apply_tone_map().

lerp3u16()

static av_always_inline v3u16_t lerp3u16 ( v3u16_t  a, v3u16_t  b, int  x, int  shift  )

static

Definition at line 150 of file lut3d.c.

Referenced by lookup_output().

lookup_output()

static av_always_inline v3u16_t lookup_output ( const SwsLut3D *  lut3d, v3u16_t  ipt  )

static

Definition at line 160 of file lut3d.c.

Referenced by ff_sws_lut3d_apply().

apply_tone_map()

static av_always_inline v3u16_t apply_tone_map ( const SwsLut3D *  lut3d, v3u16_t  ipt  )

static

Definition at line 193 of file lut3d.c.

Referenced by ff_sws_lut3d_apply().

ff_sws_lut3d_generate()

int ff_sws_lut3d_generate	(	SwsLut3D *	lut3d,
		enum AVPixelFormat	fmt_in,
		enum AVPixelFormat	fmt_out,
		const SwsColorMap *	map
	)

Recalculate the (static) 3DLUT state with new settings.

This will recompute everything. To only update per-frame tone mapping state, instead call ff_sws_lut3d_update().

Returns 0 or a negative error code.

Definition at line 211 of file lut3d.c.

Referenced by adapt_colors().

ff_sws_lut3d_update()

void ff_sws_lut3d_update	(	SwsLut3D *	lut3d,
		const SwsColor *	new_src
	)

Update the tone mapping state.

This will only use per-frame metadata. The static metadata is ignored.

Definition at line 239 of file lut3d.c.

Referenced by ff_sws_lut3d_generate(), and setup_lut3d().

ff_sws_lut3d_apply()

void ff_sws_lut3d_apply	(	const SwsLut3D *	lut3d,
		const uint8_t *	in,
		int	in_stride,
		uint8_t *	out,
		int	out_stride,
		int	w,
		int	h
	)

Applies a color transformation to a plane.

The format must match the format provided during ff_sws_lut3d_update().

Definition at line 250 of file lut3d.c.

Referenced by run_lut3d().