mpv/libvo/fastmemcpy.h

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* MPlayer 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with MPlayer; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MPLAYER_FASTMEMCPY_H
#define MPLAYER_FASTMEMCPY_H
#include "config.h"
#include <inttypes.h>
#include <string.h>
#include <stddef.h>
// meaningless ancient alias
#define fast_memcpy memcpy
#define memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 0)
#define my_memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 1)
/**
* \param limit2width always skip data between end of line and start of next
* instead of copying the full block when strides are the same
*/
static inline void * memcpy_pic2(void * dst, const void * src,
int bytesPerLine, int height,
int dstStride, int srcStride, int limit2width)
{
int i;
void *retval=dst;
if(!limit2width && 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;
}
static inline void memset_pic(void *dst, int fill, int bytesPerLine, int height,
int stride)
{
if (bytesPerLine == stride) {
memset(dst, fill, stride * height);
} else {
for (int i = 0; i < height; i++) {
memset(dst, fill, bytesPerLine);
dst = (uint8_t *)dst + stride;
}
}
}
#endif /* MPLAYER_FASTMEMCPY_H */