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FFmpeg/libavfilter/lut3d.h
Mark Reid 716b396740 avfilter/vf_lut3d: add x86-optimized tetrahedral interpolation
I spotted an interesting pattern that I didn't see before that leads to the implementation being faster.
The bit shifting table I was using before is no longer needed, and was able to remove quite a few lines. 
I also add use of FMA on the AVX2 version.

f32 1920x1080 1 thread with prelut
c impl
1434012700 UNITS in lut3d->interp,       1 runs,      0 skips
1434035335 UNITS in lut3d->interp,       2 runs,      0 skips
1423615347 UNITS in lut3d->interp,       4 runs,      0 skips
1426268863 UNITS in lut3d->interp,       8 runs,      0 skips

sse2
905484420 UNITS in lut3d->interp,       1 runs,      0 skips
905659010 UNITS in lut3d->interp,       2 runs,      0 skips
915167140 UNITS in lut3d->interp,       4 runs,      0 skips
915834222 UNITS in lut3d->interp,       8 runs,      0 skips

avx
574794860 UNITS in lut3d->interp,       1 runs,      0 skips
581035090 UNITS in lut3d->interp,       2 runs,      0 skips
584116720 UNITS in lut3d->interp,       4 runs,      0 skips
581460290 UNITS in lut3d->interp,       8 runs,      0 skips

avx2
301698880 UNITS in lut3d->interp,       1 runs,      0 skips
301982880 UNITS in lut3d->interp,       2 runs,      0 skips
306962430 UNITS in lut3d->interp,       4 runs,      0 skips
305472025 UNITS in lut3d->interp,       8 runs,      0 skips

gbrap16 1920x1080 1 thread with prelut
c impl
1480894840 UNITS in lut3d->interp,       1 runs,      0 skips
1502922990 UNITS in lut3d->interp,       2 runs,      0 skips
1496114307 UNITS in lut3d->interp,       4 runs,      0 skips
1492554551 UNITS in lut3d->interp,       8 runs,      0 skips

sse2
980777180 UNITS in lut3d->interp,       1 runs,      0 skips
986121520 UNITS in lut3d->interp,       2 runs,      0 skips
986489840 UNITS in lut3d->interp,       4 runs,      0 skips
998832248 UNITS in lut3d->interp,       8 runs,      0 skips

avx
622212360 UNITS in lut3d->interp,       1 runs,      0 skips
622981160 UNITS in lut3d->interp,       2 runs,      0 skips
645396315 UNITS in lut3d->interp,       4 runs,      0 skips
641057075 UNITS in lut3d->interp,       8 runs,      0 skips

avx2
321336400 UNITS in lut3d->interp,       1 runs,      0 skips
321268920 UNITS in lut3d->interp,       2 runs,      0 skips
323459895 UNITS in lut3d->interp,       4 runs,      0 skips
324949967 UNITS in lut3d->interp,       8 runs,      0 skips
2021-10-10 22:23:48 +02:00

84 lines
2.1 KiB
C

/*
* Copyright (c) 2013 Clément Bœsch
* Copyright (c) 2018 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_LUT3D_H
#define AVFILTER_LUT3D_H
#include "libavutil/pixdesc.h"
#include "framesync.h"
#include "avfilter.h"
enum interp_mode {
INTERPOLATE_NEAREST,
INTERPOLATE_TRILINEAR,
INTERPOLATE_TETRAHEDRAL,
INTERPOLATE_PYRAMID,
INTERPOLATE_PRISM,
NB_INTERP_MODE
};
struct rgbvec {
float r, g, b;
};
/* 3D LUT don't often go up to level 32, but it is common to have a Hald CLUT
* of 512x512 (64x64x64) */
#define MAX_LEVEL 256
#define PRELUT_SIZE 65536
typedef struct Lut3DPreLut {
int size;
float min[3];
float max[3];
float scale[3];
float* lut[3];
} Lut3DPreLut;
typedef struct LUT3DContext {
const AVClass *class;
struct rgbvec *lut;
int lutsize;
int lutsize2;
struct rgbvec scale;
int interpolation; ///<interp_mode
char *file;
uint8_t rgba_map[4];
int step;
avfilter_action_func *interp;
Lut3DPreLut prelut;
#if CONFIG_HALDCLUT_FILTER
uint8_t clut_rgba_map[4];
int clut_step;
int clut_bits;
int clut_planar;
int clut_float;
int clut_width;
FFFrameSync fs;
#endif
} LUT3DContext;
typedef struct ThreadData {
AVFrame *in, *out;
} ThreadData;
void ff_lut3d_init_x86(LUT3DContext *s, const AVPixFmtDescriptor *desc);
#endif /* AVFILTER_LUT3D_H */