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 FASTMEMCPY_H
  20 #define FASTMEMCPY_H
  21
  22 #include "config.h"
  23 #include <inttypes.h>
  24
  25 #ifdef USE_FASTMEMCPY
  26 #if defined(HAVE_MMX) || defined(HAVE_MMX2) || defined(HAVE_3DNOW) \
  27 /*    || defined(HAVE_SSE) || defined(HAVE_SSE2) */
  28 #include <stddef.h>
  29
  30 extern void * fast_memcpy(void * to, const void * from, size_t len);
  31 extern void * mem2agpcpy(void * to, const void * from, size_t len);
  32
  33 #else /* HAVE_MMX/MMX2/3DNOW/SSE/SSE2 */
  34 #define mem2agpcpy(a,b,c) memcpy(a,b,c)
  35 #define fast_memcpy(a,b,c) memcpy(a,b,c)
  36 #endif
  37
  38 #else /* USE_FASTMEMCPY */
  39 #define mem2agpcpy(a,b,c) memcpy(a,b,c)
  40 #define fast_memcpy(a,b,c) memcpy(a,b,c)
  41 #endif
  42
  43 static inline void * mem2agpcpy_pic(void * dst, const void * src, int bytesPerLine, int height, int dstStride, int srcStride)
  44 {
  45         int i;
  46         void *retval=dst;
  47
  48         if(dstStride == srcStride)
  49         {
  50                 if (srcStride < 0) {
  51                         src = (uint8_t*)src + (height-1)*srcStride;
  52                         dst = (uint8_t*)dst + (height-1)*dstStride;
  53                         srcStride = -srcStride;
  54                 }
  55
  56                 mem2agpcpy(dst, src, srcStride*height);
  57         }
  58         else
  59         {
  60                 for(i=0; i<height; i++)
  61                 {
  62                         mem2agpcpy(dst, src, bytesPerLine);
  63                         src = (uint8_t*)src + srcStride;
  64                         dst = (uint8_t*)dst + dstStride;
  65                 }
  66         }
  67
  68         return retval;
  69 }
  70
  71 #define memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 0)
  72 #define my_memcpy_pic(d, s, b, h, ds, ss) memcpy_pic2(d, s, b, h, ds, ss, 1)
  73
  74 /**
  75  * \param limit2width always skip data between end of line and start of next
  76  *                    instead of copying the full block when strides are the same
  77  */
  78 static inline void * memcpy_pic2(void * dst, const void * src,
  79                                  int bytesPerLine, int height,
  80                                  int dstStride, int srcStride, int limit2width)
  81 {
  82         int i;
  83         void *retval=dst;
  84
  85         if(!limit2width && dstStride == srcStride)
  86         {
  87                 if (srcStride < 0) {
  88                         src = (uint8_t*)src + (height-1)*srcStride;
  89                         dst = (uint8_t*)dst + (height-1)*dstStride;
  90                         srcStride = -srcStride;
  91                 }
  92
  93                 fast_memcpy(dst, src, srcStride*height);
  94         }
  95         else
  96         {
  97                 for(i=0; i<height; i++)
  98                 {
  99                         fast_memcpy(dst, src, bytesPerLine);
 100                         src = (uint8_t*)src + srcStride;
 101                         dst = (uint8_t*)dst + dstStride;
 102                 }
 103         }
 104
 105         return retval;
 106 }
 107
 108 #endif /* FASTMEMCPY_H */