blenddeinterlacer.cpp

linux下实现视频播放的播放器

/*
 *  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 "BlendDeinterlacer.h"

//#define DEBUG
#include "log.h"

#define MODULE "BlendDeinterlacer"

BlendDeinterlacer::BlendDeinterlacer()
{
#ifdef HAVE_ALTIVEC_H
    if(SDL_HasAltiVec()) {
	Merge = MergeAltivec;
	EndMerge = NULL;
	LOG_MSG("Using Altivec optimizations");
    } else
#endif
#if (C_HOSTCPU == X86) || (C_HOSTCPU == X86_64)
    if(SDL_HasSSE2()) {
	Merge = MergeSSE2;
	EndMerge = EndMMX;
	LOG_MSG("Using SSE2 optimizations");
    } else
    if(SDL_HasSSE()) {
	Merge = MergeMMXEXT;
	EndMerge = EndMMX;
	LOG_MSG("Using SSE optimizations");
    } else
    if(SDL_Has3DNow()) {
	Merge = Merge3DNow;
	EndMerge = End3DNow;
	LOG_MSG("Using 3DNow optimizations");
    } else
#endif
    {
	Merge = MergeGeneric;
	EndMerge = NULL;
    }
}

void BlendDeinterlacer::Render(unsigned char * ptr[], unsigned char * src[], deint * d)
{
    /* First line: simple copy */
    SDL_memcpy(ptr[2], src[2], d->width);
    src[2] += d->src_pitch[2];
    ptr[2] += d->dst_pitch[2];

    /* Remaining lines: mean value */
    register int j = d->height - 1;

    while(j--) {

	// Y
	Merge(ptr[2], src[2], src[2] + d->src_pitch[2], d->width);
	src[2] += d->src_pitch[2];
	ptr[2] += d->dst_pitch[2];
    }

    if(EndMerge) EndMerge();

    // Use optimized MemCopy and copy both chroma planes
    if(d->src_pitch[0] == d->dst_pitch[0]) {
	MemCopy(ptr[0], src[0], d->src_pitch[0] * (d->height>>1));
	MemCopy(ptr[1], src[1], d->src_pitch[1] * (d->height>>1));
	return;
    }

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

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