mirror of
https://github.com/game-stop/veejay.git
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95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2005 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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/*
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This effects overlays 2 images ,
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It allows the user to set the transparency per channel.
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Result will vary over different color spaces.
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*/
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#include "common.h"
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#include <veejaycore/vjmem.h>
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#include "tripplicity.h"
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vj_effect *tripplicity_init(int w, int h)
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{
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vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 3;
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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->limits[0][0] = 0;
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ve->limits[1][0] = 255; // opacity Y
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ve->limits[0][1] = 0;
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ve->limits[1][1] = 255; // opacity Cb
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ve->limits[0][2] = 0;
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ve->limits[1][2] = 255; // opacity Cr
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ve->defaults[0] = 150;
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ve->defaults[1] = 150;
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ve->defaults[2] = 150;
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ve->description = "Normal Overlay (per Channel)";
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ve->sub_format = -1;
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ve->extra_frame = 1;
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ve->has_user = 0;
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ve->parallel = 1;
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ve->param_description = vje_build_param_list( ve->num_params, "Opacity Y", "Opacity Cb", "Opacity Cr" );
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return ve;
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}
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void tripplicity_apply( void *ptr, VJFrame *frame, VJFrame *frame2, int *args )
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{
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unsigned int i;
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const int len = frame->len;
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const int uv_len = (frame->ssm ? len : frame->uv_len);
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uint8_t *Y = frame->data[0];
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uint8_t *Cb= frame->data[1];
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uint8_t *Cr= frame->data[2];
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const uint8_t *Y2 = frame2->data[0];
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const uint8_t *Cb2= frame2->data[1];
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const uint8_t *Cr2= frame2->data[2];
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int opacityL = args[0];
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int opacityCb = args[1];
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int opacityCr = args[2];
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const uint8_t op1 = (opacityL > 255) ? 255 : opacityL;
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const uint8_t op0 = 255 - op1;
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const uint8_t opCb1= (opacityCb > 255) ? 255: opacityCb;
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const uint8_t opCb0= 255 - opCb1;
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const uint8_t opCr1= (opacityCr > 255) ? 255: opacityCr;
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const uint8_t opCr0= 255 - opCr1;
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for (i = 0; i < len; i++)
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{
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Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
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}
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for (i = 0; i < uv_len; i++)
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{
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Cb[i] = (opCb0 * Cb[i] + opCb1 * Cb2[i]) >> 8;
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Cr[i] = (opCr0 * Cr[i] + opCr1 * Cr2[i]) >> 8;
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}
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}
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