/* 
 * Linux VeeJay
 *
 * Copyright(C)2004 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 "common.h"
#include <veejaycore/vjmem.h>
#include "negation.h"

vj_effect *negation_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] = 0;
    ve->limits[1][0] = 255;
    ve->defaults[0] = 255;
    ve->description = "Negation";
    ve->sub_format = -1;
    ve->extra_frame = 0;
    ve->parallel = 1;
	ve->has_user = 0;
    ve->param_description = vje_build_param_list( ve->num_params, "Value" );
    return ve;
}


void negation_apply( void *ptr, VJFrame *frame, int *args ) {
    int val = args[0];

    int i;
    const int len = frame->len;
    const int uv_len = (frame->ssm ? len : frame->uv_len );

    uint8_t *Y = frame->data[0];
    uint8_t *Cb = frame->data[1];
    uint8_t *Cr = frame->data[2];

	for( i = 0; i < len; i ++ ) {
		Y[i] = val - Y[i];
	}

	for( i = 0; i < uv_len; i ++ ) {
		Cb[i] = val - Cb[i];
		Cr[i] = val - Cr[i];
	}
}