ffmpeg/libavfilter/libmpcodecs/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 <inttypes.h>
  23 #include <string.h>
  24 #include <stddef.h>
  25
  26 void * fast_memcpy(void * to, const void * from, size_t len);
  27 void * mem2agpcpy(void * to, const void * from, size_t len);
  28
  29 #if ! defined(CONFIG_FASTMEMCPY) || ! (HAVE_MMX || HAVE_MMX2 || HAVE_AMD3DNOW /* || HAVE_SSE || HAVE_SSE2 */)
  30 #define mem2agpcpy(a,b,c) memcpy(a,b,c)
  31 #define fast_memcpy(a,b,c) memcpy(a,b,c)
  32 #endif
  33
  34 static inline void * mem2agpcpy_pic(void * dst, const void * src, int bytesPerLine, int height, int dstStride, int srcStride)
  35 {
  36     int i;
  37     void *retval=dst;
  38
  39     if(dstStride == srcStride)
  40     {
  41         if (srcStride < 0) {
  42                 src = (const uint8_t*)src + (height-1)*srcStride;
  43                 dst = (uint8_t*)dst + (height-1)*dstStride;
  44                 srcStride = -srcStride;
  45         }
  46
  47         mem2agpcpy(dst, src, srcStride*height);
  48     }
  49     else
  50     {
  51         for(i=0; i<height; i++)
  52         {
  53             mem2agpcpy(dst, src, bytesPerLine);
  54             src = (const uint8_t*)src + srcStride;
  55             dst = (uint8_t*)dst + dstStride;
  56         }
  57     }
  58
  59     return retval;
  60 }
  61
  62 #define memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 0)
  63 #define my_memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 1)
  64
  65 /**
  66  * \param limit2width always skip data between end of line and start of next
  67  *                    instead of copying the full block when strides are the same
  68  */
  69 static inline void * memcpy_pic2(void * dst, const void * src,
  70                                  int bytesPerLine, int height,
  71                                  int dstStride, int srcStride, int limit2width)
  72 {
  73     int i;
  74     void *retval=dst;
  75
  76     if(!limit2width && dstStride == srcStride)
  77     {
  78         if (srcStride < 0) {
  79                 src = (const uint8_t*)src + (height-1)*srcStride;
  80                 dst = (uint8_t*)dst + (height-1)*dstStride;
  81                 srcStride = -srcStride;
  82         }
  83
  84         fast_memcpy(dst, src, srcStride*height);
  85     }
  86     else
  87     {
  88         for(i=0; i<height; i++)
  89         {
  90             fast_memcpy(dst, src, bytesPerLine);
  91             src = (const uint8_t*)src + srcStride;
  92             dst = (uint8_t*)dst + dstStride;
  93         }
  94     }
  95
  96     return retval;
  97 }
  98
  99 #endif /* MPLAYER_FASTMEMCPY_H */