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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/>.
*/
/* Plugin idea: show only pixels that differ more than MIN_DIFFERENCE
from reference picture */
#include "context.h"
#include "pthread_utils.h"
#define MAX_DIFFERENCE 110 /* how much color value has to differ from initial
picture to be shown. This value is use when not
in beat */
#define MIN_DIFFERENCE 20 /* at highest beat, how much difference to inital
is required */
#define CURVE_BEAT 10 /* decrement to difference on beat */
#define CURVE_VOL_MIN 0.05
#define CURVE_VOL_STEP 0.1
#define CURVE_VOL_MULT 1.7
#define CURVE_START 2 /* CURVE_START * CURVE_VOL_MULT needs to be > 2,
so we need at least 2 */
uint32_t version = 0;
uint32_t options = BO_GFX | BO_LENS | BO_SFX | BO_WEBCAM | BO_NORANDOM;
char desc[] = "Show cam pic which differs, react beat";
char dname[] = "TV diff beat";
enum LayerMode mode = LM_OVERLAY;
void
run(Context_t *ctx)
{
int diff = CURVE_START;
if (ctx->input->on_beat) {
double peak;
for (peak = ctx->input->curpeak; peak > CURVE_VOL_MIN; peak -= CURVE_VOL_STEP) {
diff *= CURVE_VOL_MULT;
}
diff += CURVE_BEAT;
}
diff = MAX_DIFFERENCE - diff;
if (diff < MIN_DIFFERENCE) {
diff = MIN_DIFFERENCE;
}
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) > diff) ||
((*src2 - *src1) > diff) ) {
*dst = *src1;
} else {
*dst = 0;
}
}
xpthread_mutex_unlock(&ctx->cam_mtx[ctx->cam]);
}
}
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