mpv/libvo/fastmemcpy.h

#ifndef __MPLAYER_MEMCPY
#define __MPLAYER_MEMCPY 1

#include "config.h"
#include <inttypes.h>

#ifdef USE_FASTMEMCPY
#if defined(HAVE_MMX) || defined(HAVE_MMX2) || defined(HAVE_3DNOW) \
/*    || defined(HAVE_SSE) || defined(HAVE_SSE2) */
#include <stddef.h>

extern void * fast_memcpy(void * to, const void * from, size_t len);
extern void * mem2agpcpy(void * to, const void * from, size_t len);
#define memcpy(a,b,c) fast_memcpy(a,b,c)

#else /* HAVE_MMX/MMX2/3DNOW/SSE/SSE2 */
#define mem2agpcpy(a,b,c) memcpy(a,b,c)
#endif

#else /* USE_FASTMEMCPY */
#define mem2agpcpy(a,b,c) memcpy(a,b,c)
#endif

static inline void * mem2agpcpy_pic(void * dst, const void * src, int bytesPerLine, int height, int dstStride, int srcStride)
{
	int i;
	void *retval=dst;

	if(dstStride == srcStride)
	{
		if (srcStride < 0) {
	    		src = (uint8_t*)src + (height-1)*srcStride;
	    		dst = (uint8_t*)dst + (height-1)*dstStride;
	    		srcStride = -srcStride;
		}

		mem2agpcpy(dst, src, srcStride*height);
	}
	else
	{
		for(i=0; i<height; i++)
		{
			mem2agpcpy(dst, src, bytesPerLine);
			src = (uint8_t*)src + srcStride;
			dst = (uint8_t*)dst + dstStride;
		}
	}

	return retval;
}

static inline void * memcpy_pic(void * dst, const void * src, int bytesPerLine, int height, int dstStride, int srcStride)
{
	int i;
	void *retval=dst;

	if(dstStride == srcStride)
	{
		if (srcStride < 0) {
	    		src = (uint8_t*)src + (height-1)*srcStride;
	    		dst = (uint8_t*)dst + (height-1)*dstStride;
	    		srcStride = -srcStride;
		}

		memcpy(dst, src, srcStride*height);
	}
	else
	{
		for(i=0; i<height; i++)
		{
			memcpy(dst, src, bytesPerLine);
			src = (uint8_t*)src + srcStride;
			dst = (uint8_t*)dst + dstStride;
		}
	}

	return retval;
}

#endif