File size: 6,613 Bytes
8ead80b |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 |
/*
* Copyright (c) 2013 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
*/
#include "libavutil/common.h"
#include "libavutil/intfloat.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
#include "blend.h"
#undef PIXEL
#undef MAX
#undef HALF
#undef CLIP
#if DEPTH == 8
#define PIXEL uint8_t
#define MAX 255
#define HALF 128
#define CLIP(x) (av_clip_uint8(x))
#elif DEPTH == 32
#define PIXEL float
#define MAX 1.f
#define HALF 0.5f
#define CLIP(x) (x)
#else
#define PIXEL uint16_t
#define MAX ((1 << DEPTH) - 1)
#define HALF (1 << (DEPTH - 1))
#define CLIP(x) ((int)av_clip_uintp2(x, DEPTH))
#endif
#undef MULTIPLY
#undef SCREEN
#undef BURN
#undef DODGE
#undef GEOMETRIC
#undef INT2FLOAT
#undef FLOAT2INT
#undef MDIV
#undef LRINTF
#if DEPTH < 32
#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / MAX))
#define SCREEN(x, a, b) (MAX - (x) * ((MAX - (a)) * (MAX - (b)) / MAX))
#define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, MAX - ((MAX - (b)) << DEPTH) / (a)))
#define DODGE(a, b) (((a) == MAX) ? (a) : FFMIN(MAX, (((b) << DEPTH) / (MAX - (a)))))
#define GEOMETRIC(a, b) (lrintf(sqrtf((unsigned)A * B)))
#define INT2FLOAT(x) (x)
#define FLOAT2INT(x) (x)
#define MDIV (0.125f * (1 << DEPTH))
#define LRINTF(x) lrintf(x)
#else
#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 1.0))
#define SCREEN(x, a, b) (1.0 - (x) * ((1.0 - (a)) * (1.0 - (b)) / 1.0))
#define BURN(a, b) (((a) <= 0.0) ? (a) : FFMAX(0.0, 1.0 - (1.0 - (b)) / (a)))
#define DODGE(a, b) (((a) >= 1.0) ? (a) : FFMIN(1.0, ((b) / (1.0 - (a)))))
#define GEOMETRIC(a, b) (sqrtf(fmaxf(A, 0) * fmaxf(B, 0)))
#define INT2FLOAT(x) av_int2float(x)
#define FLOAT2INT(x) av_float2int(x)
#define MDIV 0.125f
#define LRINTF(x) (x)
#endif
#define A top[j]
#define B bottom[j]
#define fn2(a, b) blend_##a##_##b##bit
#define fn1(name, depth) fn2(name, depth)
#define fn0(name) fn1(name, DEPTH)
#define fn(NAME, EXPR) \
static void fn0(NAME)(const uint8_t *_top, ptrdiff_t top_linesize, \
const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
uint8_t *_dst, ptrdiff_t dst_linesize, \
ptrdiff_t width, ptrdiff_t height, \
FilterParams *param, double *values, int starty) \
{ \
const PIXEL *top = (const PIXEL *)_top; \
const PIXEL *bottom = (const PIXEL *)_bottom; \
PIXEL *dst = (PIXEL *)_dst; \
const float opacity = param->opacity; \
\
dst_linesize /= sizeof(PIXEL); \
top_linesize /= sizeof(PIXEL); \
bottom_linesize /= sizeof(PIXEL); \
\
for (int i = 0; i < height; i++) { \
for (int j = 0; j < width; j++) { \
dst[j] = top[j] + ((EXPR)-top[j]) * opacity; \
} \
dst += dst_linesize; \
top += top_linesize; \
bottom += bottom_linesize; \
} \
}
fn(addition, FFMIN(MAX, A + B))
fn(grainmerge, CLIP(A + B - HALF))
fn(average, (A + B) / 2)
fn(subtract, FFMAX(0, A - B))
fn(multiply, MULTIPLY(1, A, B))
fn(multiply128,CLIP((A - HALF) * B / MDIV + HALF))
fn(negation, MAX - FFABS(MAX - A - B))
fn(extremity, FFABS(MAX - A - B))
fn(difference, FFABS(A - B))
fn(grainextract, CLIP(HALF + A - B))
fn(screen, SCREEN(1, A, B))
fn(overlay, (A < HALF) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
fn(hardlight, (B < HALF) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
fn(hardmix, (A < (MAX - B)) ? 0: MAX)
fn(heat, (A == 0) ? 0 : MAX - FFMIN(((MAX - B) * (MAX - B)) / A, MAX))
fn(freeze, (B == 0) ? 0 : MAX - FFMIN(((MAX - A) * (MAX - A)) / B, MAX))
fn(darken, FFMIN(A, B))
fn(lighten, FFMAX(A, B))
fn(divide, CLIP(B == 0 ? MAX : MAX * A / B))
fn(dodge, DODGE(A, B))
fn(burn, BURN(A, B))
fn(softlight, CLIP(A * A / MAX + (2 * (B * ((A * (MAX - A)) / MAX) / MAX))))
fn(exclusion, A + B - 2 * A * B / MAX)
fn(pinlight, (B < HALF) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - HALF)))
fn(phoenix, FFMIN(A, B) - FFMAX(A, B) + MAX)
fn(reflect, (B == MAX) ? B : FFMIN(MAX, (A * A / (MAX - B))))
fn(glow, (A == MAX) ? A : FFMIN(MAX, (B * B / (MAX - A))))
fn(and, INT2FLOAT(FLOAT2INT(A) & FLOAT2INT(B)))
fn(or, INT2FLOAT(FLOAT2INT(A) | FLOAT2INT(B)))
fn(xor, INT2FLOAT(FLOAT2INT(A) ^ FLOAT2INT(B)))
fn(vividlight, (A < HALF) ? BURN(2 * A, B) : DODGE(2 * (A - HALF), B))
fn(linearlight,CLIP((B < HALF) ? B + 2 * A - MAX : B + 2 * (A - HALF)))
fn(softdifference,CLIP((A > B) ? (B == MAX) ? 0 : (A - B) * MAX / (MAX - B) : (B == 0) ? 0 : (B - A) * MAX / B))
fn(geometric, GEOMETRIC(A, B))
fn(harmonic, A == 0 && B == 0 ? 0 : 2LL * A * B / (A + B))
fn(bleach, (MAX - B) + (MAX - A) - MAX)
fn(stain, 2 * MAX - A - B)
fn(interpolate,LRINTF(MAX * (2 - cosf(A * M_PI / MAX) - cosf(B * M_PI / MAX)) * 0.25f))
fn(hardoverlay,A == MAX ? MAX : FFMIN(MAX, MAX * B / (2 * MAX - 2 * A) * (A > HALF) + 2 * A * B / MAX * (A <= HALF)))
|