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/*
* Color Correction Plugin (YUV Version) 0.01
*
* Copyright (c) 2005 Peter Schlaile
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
*/
#include "math.h"
#include "plugin.h"
#include <stdio.h>
char name[]= "Color Correction";
VarStruct varstr[]= {
{ NUMSLI|FLO, "St Y:", 0.0, -1.0, 1.0, "Setup Y"},
{ NUMSLI|FLO, "Gn Y:", 1.0, 0.0, 10.0,"Gain Y"},
{ NUMSLI|FLO, "Ga Y:", 1.0, 0.0, 10.0, "Gamma Y"},
{ NUMSLI|FLO, "Lo S:", 1.0, 0.0, 10.0,"Saturation Shadows"},
{ NUMSLI|FLO, "Md S:", 1.0, 0.0, 10.0,"Saturation Midtones"},
{ NUMSLI|FLO, "Hi S:", 1.0, 0.0, 10.0,"Saturation Highlights"},
{ NUMSLI|FLO, "MA S:", 1.0, 0.0, 10.0,"Master Saturation"},
{ NUMSLI|FLO, "Lo T:", 0.25, 0.0, 1.0,
"Saturation Shadow Thres"},
{ NUMSLI|FLO, "Hi T:", 0.75, 0.0, 1.0,
"Saturation Highlights Thres"},
{ TOG|INT, "Debug", 0.0, 0.0, 1.0,
"Show curves as overlay"},
};
typedef struct Cast {
float setup_y;
float gain_y;
float gamma_y;
float sat_shadows;
float sat_midtones;
float sat_highlights;
float master_sat;
float lo_thres;
float hi_thres;
int debug;
} Cast;
float cfra;
void plugin_seq_doit(Cast *, float, float, int, int, ImBuf *, ImBuf *, ImBuf *, ImBuf *);
int plugin_seq_getversion(void) { return B_PLUGIN_VERSION;}
void plugin_but_changed(int but) {}
void plugin_init() {}
void plugin_getinfo(PluginInfo *info) {
info->name= name;
info->nvars= sizeof(varstr)/sizeof(VarStruct);
info->cfra= &cfra;
info->varstr= varstr;
info->init= plugin_init;
info->seq_doit= (SeqDoit) plugin_seq_doit;
info->callback= plugin_but_changed;
}
static void rgb_to_yuv(float rgb[3], float yuv[3]) {
yuv[0]= 0.299*rgb[0] + 0.587*rgb[1] + 0.114*rgb[2];
yuv[1]= 0.492*(rgb[2] - yuv[0]);
yuv[2]= 0.877*(rgb[0] - yuv[0]);
/* Normalize */
yuv[1] /= 0.436;
yuv[2] /= 0.615;
}
static void yuv_to_rgb(float yuv[3], float rgb[3]) {
yuv[1] *= 0.436;
yuv[2] *= 0.615;
rgb[0] = yuv[2]/0.877 + yuv[0];
rgb[2] = yuv[1]/0.492 + yuv[0];
rgb[1] = (yuv[0] - 0.299*rgb[0] - 0.114*rgb[2]) / 0.587;
if (rgb[0] > 1.0) {
rgb[0] = 1.0;
}
if (rgb[0] < 0.0) {
rgb[0] = 0.0;
}
if (rgb[1] > 1.0) {
rgb[1] = 1.0;
}
if (rgb[1] < 0.0) {
rgb[1] = 0.0;
}
if (rgb[2] > 1.0) {
rgb[2] = 1.0;
}
if (rgb[2] < 0.0) {
rgb[2] = 0.0;
}
}
void plugin_seq_doit(Cast *cast, float facf0, float facf1, int width,
int height, ImBuf *ibuf1, ImBuf *ibuf2, ImBuf *out, ImBuf *use) {
char *dest, *src1, *src2;
int x, y, c;
float rgb[3];
float yuv[3];
float gamma_table[256];
float uv_table[256];
float *destf = out->rect_float;
float *src1f;
if (!ibuf1) return;
dest= (char *) out->rect;
src1= (char *) ibuf1->rect;
src1f= ibuf1->rect_float;
for (y = 0; y < 256; y++) {
float v = 1.0 * y / 255;
v += cast->setup_y;
v *= cast->gain_y;
v = pow(v, cast->gamma_y);
if ( v > 1.0) {
v = 1.0;
} else if (v < 0.0) {
v = 0.0;
}
gamma_table[y] = v * 255;
}
for (y = 0; y < 256; y++) {
float v = 1.0;
v *= cast->master_sat;
if (y < cast->lo_thres * 255) {
v *= cast->sat_shadows;
} else if (y > cast->hi_thres * 255) {
v *= cast->sat_highlights;
} else {
v *= cast->sat_midtones;
}
uv_table[y] = v;
}
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
float fac;
if (out->rect_float) {
rgb[0]= (float)src1f[0]/255.0;
rgb[1]= (float)src1f[1]/255.0;
rgb[2]= (float)src1f[2]/255.0;
} else {
rgb[0]= (float)src1[0]/255.0;
rgb[1]= (float)src1[1]/255.0;
rgb[2]= (float)src1[2]/255.0;
}
rgb_to_yuv(rgb, yuv);
yuv[0] = gamma_table[(int) (yuv[0] * 255.0)] / 255.0;
fac = uv_table[(int) (255.0 * yuv[0])];
yuv[1] = yuv[1] * fac;
yuv[2] = yuv[2] * fac;
if (yuv[1] > 1.0) {
yuv[1] = 1.0;
}
if (yuv[1] < -1.0) {
yuv[1] = -1.0;
}
if (yuv[2] > 1.0) {
yuv[2] = 1.0;
}
if (yuv[2] < -1.0) {
yuv[2] = -1.0;
}
yuv_to_rgb(yuv, rgb);
if (out->rect_float) {
*destf++ = rgb[0];
*destf++ = rgb[1];
*destf++ = rgb[2];
destf++;
src1f += 4;
} else {
*dest++ = rgb[0]*255.0;
*dest++ = rgb[1]*255.0;
*dest++ = rgb[2]*255.0;
dest++;
src1 += 4;
}
}
}
if (cast->debug) {
dest= (char *) out->rect;
for (c = 0; c < 10; c++) {
x = 0;
for (y = 0; y < 256; y++) {
char val = gamma_table[y];
while (x < y * width / 255) {
*dest++ = val;
*dest++ = val;
*dest++ = val;
dest++;
x++;
}
}
}
for (c = 0; c < 10; c++) {
x = 0;
for (y = 0; y < 256; y++) {
char val = uv_table[y] * 255.0/10.0;
while (x < y * width / 255) {
*dest++ = val;
*dest++ = val;
*dest++ = val;
dest++;
x++;
}
}
}
}
}
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