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fastmemcpy.h
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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 */