/* 
 * Linux VeeJay
 *
 * Copyright(C)2002 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 <libvje/effects/common.h>
#include <veejaycore/vjmem.h>
#include "channeloverlay.h"

vj_effect *channeloverlay_init(int width, int height)
{
    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->defaults[0] = 0; 
    ve->limits[0][0] = 0;
    ve->limits[1][0] = 7;
    
    ve->sub_format = 1;
    ve->parallel = 1;
    ve->description = "Channel Overlay";
    ve->extra_frame = 1;
	ve->has_user = 0;
	ve->param_description = vje_build_param_list( ve->num_params, "Operator" );
	ve->hints = vje_init_value_hint_list( ve->num_params );

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

    return ve;
}



void channeloverlay_apply( void *ptr, VJFrame *frame, VJFrame *frame2, int *args) {
    int mode = args[0];

	unsigned int i;
	const int len = frame->len;
	const uint8_t *Y2 = frame2->data[0];
    const uint8_t *Cb2= frame2->data[1];
    const uint8_t *Cr2= frame2->data[2];
	const uint8_t *A2 = frame2->data[3];
	
	uint8_t *Y = frame->data[0];
    uint8_t *Cb= frame->data[1];
    uint8_t *Cr= frame->data[2];

	switch( mode ) {
		case 0:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = Y2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 1:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = 0xff - Y2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 2:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = Cb2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 3:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = 0xff - Cb2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 4:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = Cr2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 5:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = 0xff - Cr2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 6:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = A2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		case 7:
			for( i = 0; i < len ; i ++ )
			{
				unsigned int op0 = 0xff - A2[i];
				unsigned int op1 = 255 - op0;
				Y[i] = (op0 * Y[i] + op1 * Y2[i]) >> 8;
				Cb[i] = (op0 * Cb[i] + op1 * Cb2[i]) >> 8;
				Cr[i] = (op0 * Cr[i] + op1 * Cr2[i]) >> 8;
			}
			break;
		
	}

}