/* 
 * 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 "common.h"
#include <veejaycore/vjmem.h>
#include "mirrors2.h"

vj_effect *mirrors2_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->defaults[0] = 4;
	ve->limits[0][0] = 0;	/* horizontal or vertical mirror */
	ve->limits[1][0] = 5;
	ve->sub_format = 1;
	ve->description = "Mirror";
	ve->extra_frame = 0;
	ve->has_user = 0;
	ve->param_description = vje_build_param_list(ve->num_params, "H or V mode");
	return ve;
}

static void mirror_multi_dr(uint8_t * yuv[3], int width, int height)
{

	unsigned int x, y;
	const unsigned int hlen = height / 2;
	const unsigned int vlen = width / 2;
	unsigned int yi1, yi2;
	uint8_t p, cr, cb;

	for (y = hlen; y < height; y++) {
		yi1 = y * width;
		yi2 = (height - y - 1) * width;
		for (x = vlen; x < width; x++) {
			p = yuv[0][yi1 + x];
			yuv[0][yi1 + x + (width - x - 1)] = p;
			yuv[0][yi2 + x] = p;
			yuv[0][yi2 + (width - x - 1)] = p;
			cb = yuv[1][yi1 + x];
			cr = yuv[2][yi1 + x];
			yuv[1][yi1 + x + (width - x - 1)] = cb;
			yuv[1][yi2 + x] = cb;
			yuv[1][yi2 + (width - x - 1)] = cb;
			yuv[2][yi1 + x + (width - x - 1)] = cr;
			yuv[2][yi2 + x] = cr;
			yuv[2][yi2 + (width - x - 1)] = cr;
		}
	}
}

static void mirror_multi_u(uint8_t * yuv[3], int width, int height)
{
	unsigned int x, y;

	unsigned int yi1, yi2;
	const unsigned int hlen = height / 2;

	uint8_t p, cb, cr;

	for (y = 0; y < hlen; y++) {
		yi1 = y * width;
		yi2 = (height - y - 1) * width;
		for (x = 0; x < width; x++) {
			p = yuv[0][yi1 + x];
			yuv[0][yi2 + x] = p;
			cb = yuv[1][yi1 + x];
			cr = yuv[2][yi1 + x];
			yuv[1][yi2 + x] = cb;
			yuv[2][yi2 + x] = cr;
		}
	}
}

static void mirror_multi_d(uint8_t * yuv[3], int width, int height)
{
	unsigned int x, y;
	unsigned int yi1 = 0;
	unsigned int yi2 = 0;
	const unsigned int hlen = height / 2;
	uint8_t p, cb, cr;

	for (y = hlen; y < height; y++) {
		yi1 = y * width;
		yi2 = (height - y - 1) * width;
		for (x = 0; x < width; x++) {
			p = yuv[0][yi1 + x];
			yuv[0][yi2 + x] = p;
			cb = yuv[1][yi1 + x];
			cr = yuv[2][yi1 + x];
			yuv[1][yi2 + x] = cb;
			yuv[2][yi2 + x] = cr;
		}
	}
}

static void mirror_multi_l(uint8_t * yuv[3], int width, int height)
{
	unsigned int x, y;
	unsigned int yi;
	const unsigned int vlen = width / 2;
	uint8_t p, cb, cr;
	for (y = 0; y < height; y++) {
		yi = y * width;
		for (x = vlen; x < width; x++) {
			p = yuv[0][yi + x];
			yuv[0][yi + (width - x - 1)] = p;
			cb = yuv[1][yi + x];
			yuv[1][yi + (width - x - 1)] = cb;
			cr = yuv[2][yi + x];
			yuv[2][yi + (width - x - 1)] = cr;
		}
	}
}

static void mirror_multi_r(uint8_t * yuv[3], int width, int height)
{
	unsigned int x, y;
	unsigned int yi;
	uint8_t p, cb, cr;

	for (y = 0; y < height; y++) {
		yi = y * width;
		for (x = 0; x < width; x++) {
			p = yuv[0][yi + x];
			yuv[0][yi + (width - x - 1)] = p;
			cb = yuv[1][yi + x];
			cr = yuv[2][yi + x];
			yuv[1][yi + (width - x - 1)] = cb;
			yuv[2][yi + (width - x - 1)] = cr;
		}
	}
}

static void mirror_multi_ur(uint8_t * yuv[3], int width, int height)
{
	unsigned int x, y;

	unsigned int yi, yi2;
	const unsigned int vlen = width / 2;
	const unsigned int hlen = width / 2;
	uint8_t p, cb, cr;

	for (y = hlen; y < height; y++) {
		yi = y * width;
		yi2 = (height - y - 1) * width;
		for (x = 0; x < vlen; x++) {
			p = yuv[0][yi + x];
			yuv[0][yi + (width - x - 1)] = p;
			yuv[0][yi2 + x] = p;
			yuv[0][yi2 + x + (width - x - 1)] = p;
			cb = yuv[1][yi + x];
			cr = yuv[2][yi + x];
			yuv[1][yi + (width - x - 1)] = cb;
			yuv[1][yi2 + x] = cb;
			yuv[1][yi2 + x + (width - x - 1)] = cb;
			yuv[2][yi + (width - x - 1)] = cr;
			yuv[2][yi2 + x] = cr;
			yuv[2][yi2 + x + (width - x - 1)] = cr;
		}
	}
}

void mirrors2_apply(void *ptr, VJFrame *frame, int *args ) {
    int type = args[0];

	switch (type) {
		case 0:
			mirror_multi_dr(frame->data, frame->width, frame->height);
		break;
		case 1:
			mirror_multi_ur(frame->data, frame->width, frame->height);
		break;
		case 2:
			mirror_multi_u(frame->data, frame->width, frame->height);
		break;
		case 3:
			mirror_multi_d(frame->data, frame->width, frame->height);
		break;
		case 4:
			mirror_multi_l(frame->data, frame->width, frame->height);
		break;
		case 5:
			mirror_multi_r(frame->data, frame->width, frame->height);
		break;
	}
}