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add fx alpha dampening

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niels
2015-12-02 23:49:22 +01:00
parent c9dff8e56d
commit 24a28b2159
2 changed files with 89 additions and 0 deletions
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60
veejay-current/veejay-server/libvje/effects/alphadampen.c Normal file
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/*
* Linux VeeJay
*
* Copyright(C)2015 Niels Elburg <nwelburg@gmail.com>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
*/
#include <config.h>
#include <stdint.h>
#include <stdio.h>
#include <libvjmem/vjmem.h>
#include "alphadampen.h"
vj_effect *alphadampen_init(int w, int h)
{
vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
ve->num_params = 1;
ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
ve->limits[0][0] = 1;
ve->limits[1][0] = 255;
ve->defaults[0] = 64;
ve->description = "Alpha: Dampen";
ve->sub_format = -1;
ve->extra_frame = 0;
ve->has_user = 0;
ve->parallel = 1;
ve->param_description = vje_build_param_list( ve->num_params, "Dampening value" );
ve->alpha = FLAG_ALPHA_OUT;
return ve;
}
void alphadampen_apply( VJFrame *frame, int b1)
{
size_t i;
const size_t len = frame->len;
uint8_t tmp;
uint8_t *A = frame->data[3];
const int base = (const int) b1;
for( i = 0 ; i < len ; i ++ )
{
tmp = A[i];
A[i] = (tmp / base) * base; // loose fractional part
}
}

29
veejay-current/veejay-server/libvje/effects/alphadampen.h Normal file
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/*
* Linux VeeJay
*
* Copyright(C)2015 Niels Elburg <nwelburg@gmail.com>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
*/
#ifndef ALPHA_DAMPEN_H
#define ALPHA_DAMPEN_H
#include <libvje/vje.h>
#include <sys/types.h>
#include <stdint.h>
vj_effect *alphadampen_init(int w, int h);
void alphadampen_apply( VJFrame *frame, int b1);
#endif