diff options
Diffstat (limited to 'release/plugins/sequence/color-correction-yuv.c')
| -rw-r--r-- | release/plugins/sequence/color-correction-yuv.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/release/plugins/sequence/color-correction-yuv.c b/release/plugins/sequence/color-correction-yuv.c new file mode 100644 index 00000000000..c68d78c9fc0 --- /dev/null +++ b/release/plugins/sequence/color-correction-yuv.c @@ -0,0 +1,220 @@ +/* + * 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]; + + if (!ibuf1) return; + + dest= (char *) out->rect; + src1= (char *) ibuf1->rect; + + 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; + 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); + + *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++; + } + } + } + } +} |