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/*
* Copyright 1994-2022 Olivier Girondel
* Copyright 2019-2022 Tavasti
*
* This file is part of lebiniou.
*
* lebiniou 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.
*
* lebiniou 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.
*
* You should have received a copy of the GNU General Public License
* along with lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
#include "context.h"
#include "pthread_utils.h"
#define MIN_DIFFERENCE 40 /* how much color value has to differ from initial
to be shown. Lower values show target better,
but also show more flickering */
uint32_t version = 0;
uint32_t options = BO_GFX | BO_LENS | BO_WEBCAM | BO_NORANDOM;
char desc[] = "Show cam pic which differs";
char dname[] = "TV diff 3";
enum LayerMode mode = LM_OVERLAY;
void
run(Context_t *ctx)
{
Pixel_t *src1, *start, *src2, *dst;
dst = start = passive_buffer(ctx)->buffer;
if (!xpthread_mutex_lock(&ctx->cam_mtx[ctx->cam])) {
src1 = ctx->cam_save[ctx->cam][0]->buffer;
src2 = ctx->cam_ref0[ctx->cam]->buffer;
for (; dst < start + BUFFSIZE * sizeof(Pixel_t); src1++, src2++, dst++) {
if (((*src1 - *src2) > MIN_DIFFERENCE) ||
((*src2 - *src1) > MIN_DIFFERENCE) ) {
*dst = abs(*src1 - *src2);
} else {
*dst = 0;
}
}
xpthread_mutex_unlock(&ctx->cam_mtx[ctx->cam]);
}
}
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