discarddeinterlacer.cpp

来自「linux下实现视频播放的播放器」· C++ 代码 · 共 47 行

/*
 *  Copyright (C) 2005-2008  gulikoza, mtrooper
 *
 *  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.
 */

/* $Id$ */

#include "DiscardDeinterlacer.h"

void DiscardDeinterlacer::Render(unsigned char * ptr[], unsigned char * src[], deint * d)
{
    /* Copy image and skip lines */
    src[2] += d->flags * d->src_pitch[2];
    src[1] += d->flags * d->src_pitch[1];
    src[0] += d->flags * d->src_pitch[0];

    register int j = d->height>>1;
    register unsigned int k = 0;

    while(j--) {

	// Y
	SDL_memcpy(ptr[2], src[2], d->width);
	src[2] += d->src_pitch[2]<<1;
	ptr[2] += d->dst_pitch[2];

	// U & V
	SDL_memcpy(ptr[k], src[k], d->width>>1);
	src[k] += d->src_pitch[k]<<1;
	ptr[k] += d->dst_pitch[k];
	k = (k+1)&1;
    }
}