/* 
 * Linux VeeJay
 *
 * Copyright(C)2008 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 "negatechannel.h"

vj_effect *negatechannel_init(int w, int h)
{
    vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
    ve->num_params = 2;

    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] = 3;
    ve->limits[0][1] = 0;
    ve->limits[1][1] = 0xff;
    ve->defaults[0] = 0;
    ve->defaults[1] = 0xff;
    ve->description = "Negate a channel";
    ve->parallel = 1;
	ve->sub_format = -1;
    ve->extra_frame = 0;
    ve->has_user = 0;
    ve->param_description = vje_build_param_list( ve->num_params, "Mode", "Value" );

	ve->hints = vje_init_value_hint_list( ve->num_params );

	vje_build_value_hint_list( ve->hints, ve->limits[1][0], 0, "Luminance" ,"Chroma Blue", "Chroma Red", "Chroma Red and Blue" );

    return ve;
}

void negatechannel_apply( void *ptr, VJFrame *frame, int *args ) {
    int chan = args[0];
    int val = args[1];

    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];

    switch( chan ) {
		case 0:
			for (i = 0; i < len; i++) {
				Y[i] = val - Y[i];
		    }
			break;
		case 1:
			for (i = 0; i < uv_len; i++) {
				Cb[i] = val - Cb[i];
		    }
			break;
		case 2:
			for (i = 0; i < uv_len; i++) {
				Cr[i] = val - Cr[i];
			}
		case 3:
			for( i = 0; i < uv_len; i ++ ) {
				Cb[i] = val - Cb[i];
				Cr[i] = val - Cr[i];
			}
			break;
   }
}