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/*
* Copyright 1994-2012 Olivier Girondel
*
* 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"
u_long id = 1329763807;
u_long options = BE_GFX|BEQ_PICTURE|BEQ_BYPASS;
char desc[] = "DiffTV";
u_long mode = OVERLAY;
extern int webcams;
#if 0
// #define PALETTE 1
#ifdef PALETTE
#define MaxColor 120
#endif
#define Decay 15
#define MAGIC_THRESHOLD 50
static Buffer8_t *buffer = NULL, *diff = NULL;
#ifdef PALETTE
static Cmap8_t *palette = NULL;
#endif
/*
* fastrand - fast fake random number generator
* Warning: The low-order bits of numbers generated by fastrand()
* are bad as random numbers. For example, fastrand()%4
* generates 1,2,3,0,1,2,3,0...
* You should use high-order bits.
*/
static unsigned int fastrand_val;
static unsigned int
fastrand()
{
return (fastrand_val = fastrand_val * 1103515245 + 12345);
}
static void
fastsrand(unsigned int seed)
{
fastrand_val = seed;
}
#ifdef PALETTE
static void
HSItoRGB(double h, double s, double i, int *r, int *g, int *b)
{
double t, rv, gv, bv;
rv = 1 + s * sin(h - 2 * M_PI / 3);
gv = 1 + s * sin(h);
bv = 1 + s * sin(h + 2 * M_PI / 3);
t = 255.999 * i / 2;
*r = trunc(rv * t);
*g = trunc(gv * t);
*b = trunc(bv * t);
}
static void
make_palette(Cmap8_t *palette)
{
int i, r, g, b;
for (i = 0; i < MaxColor; i++) {
HSItoRGB(4.6 - 1.5 * i / MaxColor, (double)i / MaxColor, (double)i / MaxColor, &r, &g, &b);
palette->colors[i].col.r = r;
palette->colors[i].col.g = g;
palette->colors[i].col.b = b;
}
for (i = MaxColor; i < 256; i++) {
if (r < 255) r++;
if (r < 255) r++;
if (r < 255) r++;
if (g < 255) g++;
if (g < 255) g++;
if (b < 255) b++;
if (b < 255) b++;
palette->colors[i].col.r = r;
palette->colors[i].col.g = g;
palette->colors[i].col.b = b;
}
}
#endif
#endif /* 0liv3 */
void
create(__attribute__ ((unused)) Context_t *ctx)
{
if (!webcams)
options |= BEQ_DISABLED;
/*
else {
buffer = Buffer8_new();
diff = Buffer8_new();
fastsrand(time(NULL));
}
*/
}
void
on_switch_on(Context_t *ctx)
{
ctx->ref_taken[ctx->cam] = 0;
}
void
delete(__attribute__ ((unused)) Context_t *ctx)
{
/*
Buffer8_delete(buffer);
Buffer8_delete(diff);
*/
}
void
run(Context_t *ctx)
{
Pixel_t *src1, *start, *src2, *dst;
if (!webcams)
return;
dst = start = passive_buffer(ctx)->buffer;
pthread_mutex_lock(&ctx->cam_mtx[ctx->cam]);
src1 = ctx->cam_save[ctx->cam][0]->buffer;
src2 = ctx->cam_ref[ctx->cam]->buffer;
for (; dst < start+BUFFSIZE*sizeof(Pixel_t); src1++, src2++, dst++)
*dst = abs(*src1 - *src2);
pthread_mutex_unlock(&ctx->cam_mtx[ctx->cam]);
}
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