libvo/fastmemcpy.h

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with MPlayer; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef MPLAYER_FASTMEMCPY_H
  20 #define MPLAYER_FASTMEMCPY_H
  21
  22 #include "config.h"
  23 #include <inttypes.h>
  24 #include <string.h>
  25 #include <stddef.h>
  26
  27 void * fast_memcpy(void * to, const void * from, size_t len);
  28 void * mem2agpcpy(void * to, const void * from, size_t len);
  29
  30 #if ! defined(CONFIG_FASTMEMCPY) || ! (HAVE_MMX || HAVE_MMX2 || HAVE_AMD3DNOW /* || HAVE_SSE || HAVE_SSE2 */)
  31 #define mem2agpcpy(a,b,c) memcpy(a,b,c)
  32 #define fast_memcpy(a,b,c) memcpy(a,b,c)
  33 #endif
  34
  35 static inline void * mem2agpcpy_pic(void * dst, const void * src, int bytesPerLine, int height, int dstStride, int srcStride)
  36 {
  37         int i;
  38         void *retval=dst;
  39
  40         if(dstStride == srcStride)
  41         {
  42                 if (srcStride < 0) {
  43                         src = (uint8_t*)src + (height-1)*srcStride;
  44                         dst = (uint8_t*)dst + (height-1)*dstStride;
  45                         srcStride = -srcStride;
  46                 }
  47
  48                 mem2agpcpy(dst, src, srcStride*height);
  49         }
  50         else
  51         {
  52                 for(i=0; i<height; i++)
  53                 {
  54                         mem2agpcpy(dst, src, bytesPerLine);
  55                         src = (uint8_t*)src + srcStride;
  56                         dst = (uint8_t*)dst + dstStride;
  57                 }
  58         }
  59
  60         return retval;
  61 }
  62
  63 #define memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 0)
  64 #define my_memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 1)
  65
  66 /**
  67  * \param limit2width always skip data between end of line and start of next
  68  *                    instead of copying the full block when strides are the same
  69  */
  70 static inline void * memcpy_pic2(void * dst, const void * src,
  71                                  int bytesPerLine, int height,
  72                                  int dstStride, int srcStride, int limit2width)
  73 {
  74         int i;
  75         void *retval=dst;
  76
  77         if(!limit2width && dstStride == srcStride)
  78         {
  79                 if (srcStride < 0) {
  80                         src = (uint8_t*)src + (height-1)*srcStride;
  81                         dst = (uint8_t*)dst + (height-1)*dstStride;
  82                         srcStride = -srcStride;
  83                 }
  84
  85                 fast_memcpy(dst, src, srcStride*height);
  86         }
  87         else
  88         {
  89                 for(i=0; i<height; i++)
  90                 {
  91                         fast_memcpy(dst, src, bytesPerLine);
  92                         src = (uint8_t*)src + srcStride;
  93                         dst = (uint8_t*)dst + dstStride;
  94                 }
  95         }
  96
  97         return retval;
  98 }
  99
 100 #endif /* MPLAYER_FASTMEMCPY_H */