mirror of
https://github.com/game-stop/veejay.git
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128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2004 Niels Elburg <nwelburg@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License , or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <libvjmem/vjmem.h>
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#include <math.h>
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#include "common.h"
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#include "greyselect.h"
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vj_effect *greyselect_init(int w, int h)
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{
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vj_effect *ve;
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ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 5;
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ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
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ve->defaults[0] = 4500; /* angle */
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ve->defaults[1] = 255; /* r */
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ve->defaults[2] = 0; /* g */
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ve->defaults[3] = 0; /* b */
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ve->defaults[4] = 0; /* swap */
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ve->limits[0][0] = 1;
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ve->limits[1][0] = 9000;
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ve->limits[0][1] = 0;
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ve->limits[1][1] = 255;
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ve->limits[0][2] = 0;
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ve->limits[1][2] = 255;
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ve->limits[0][3] = 0;
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ve->limits[1][3] = 255;
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ve->limits[0][4] = 0;
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ve->limits[1][4] = 1;
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ve->has_user = 0;
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ve->parallel = 1;
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ve->description = "Grayscale by Color Key (RGB)";
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ve->extra_frame = 0;
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ve->sub_format = 1;
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ve->rgb_conv = 1;
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ve->param_description = vje_build_param_list(ve->num_params,"Angle","Red","Green","Blue", "Swap");
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return ve;
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}
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void greyselect_apply( VJFrame *frame, int width,
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int height, int i_angle, int r, int g,
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int b, int swap)
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{
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uint8_t *fg_cb, *fg_cr;
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int accept_angle_tg;
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int cb, cr;
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float kg1, tmp, aa = 255.0f, bb = 255.0f, _y = 0;
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float angle = (float) i_angle / 100.0f;
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unsigned int pos;
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uint8_t val;
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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int iy=0,iu=128,iv=128;
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_rgb2yuv(r,g,b,iy,iu,iv);
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_y = (float) iy;
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aa = (float) iu;
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bb = (float) iv;
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tmp = sqrt(((aa * aa) + (bb * bb)));
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cb = 255 * (aa / tmp);
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cr = 255 * (bb / tmp);
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kg1 = tmp;
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/* obtain coordinate system for cb / cr */
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accept_angle_tg = (int)( 15.0f * tanf(M_PI * angle / 180.0f));
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tmp = 1 / kg1;
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/* intialize pointers */
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fg_cb = Cb;
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fg_cr = Cr;
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if( swap == 0 ) {
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for (pos = (width * height); pos != 0; pos--) {
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short xx, yy;
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xx = (((fg_cb[pos]) * cb) + ((fg_cr[pos]) * cr)) >> 7;
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yy = (((fg_cr[pos]) * cb) - ((fg_cb[pos]) * cr)) >> 7;
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val = (xx * accept_angle_tg) >> 4;
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if (abs(yy) > val) {
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Cb[pos]=128;
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Cr[pos]=128;
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}
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}
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}
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else {
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for (pos = (width * height); pos != 0; pos--) {
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short xx, yy;
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xx = (((fg_cb[pos]) * cb) + ((fg_cr[pos]) * cr)) >> 7;
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yy = (((fg_cr[pos]) * cb) - ((fg_cb[pos]) * cr)) >> 7;
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val = (xx * accept_angle_tg) >> 4;
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if (abs(yy) <= val) {
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Cb[pos]=128;
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Cr[pos]=128;
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}
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}
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}
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}
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void greyselect_free(){}
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