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revision 1.2, Fri May 3 00:45:10 2002 UTC revision 1.9, Tue Feb 11 21:56:31 2003 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - 8x8 block-based halfpel interpolation - headers
5     *
6     *  Copyright(C) 2002 Peter Ross <pross@xvid.org>
7     *
8     *  This file is part of XviD, a free MPEG-4 video encoder/decoder
9     *
10     *  XviD is free software; you can redistribute it and/or modify it
11     *  under the terms of the GNU General Public License as published by
12     *  the Free Software Foundation; either version 2 of the License, or
13     *  (at your option) any later version.
14     *
15     *  This program is distributed in the hope that it will be useful,
16     *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18     *  GNU General Public License for more details.
19     *
20     *  You should have received a copy of the GNU General Public License
21     *  along with this program; if not, write to the Free Software
22     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23     *
24     *  Under section 8 of the GNU General Public License, the copyright
25     *  holders of XVID explicitly forbid distribution in the following
26     *  countries:
27     *
28     *    - Japan
29     *    - United States of America
30     *
31     *  Linking XviD statically or dynamically with other modules is making a
32     *  combined work based on XviD.  Thus, the terms and conditions of the
33     *  GNU General Public License cover the whole combination.
34     *
35     *  As a special exception, the copyright holders of XviD give you
36     *  permission to link XviD with independent modules that communicate with
37     *  XviD solely through the VFW1.1 and DShow interfaces, regardless of the
38     *  license terms of these independent modules, and to copy and distribute
39     *  the resulting combined work under terms of your choice, provided that
40     *  every copy of the combined work is accompanied by a complete copy of
41     *  the source code of XviD (the version of XviD used to produce the
42     *  combined work), being distributed under the terms of the GNU General
43     *  Public License plus this exception.  An independent module is a module
44     *  which is not derived from or based on XviD.
45     *
46     *  Note that people who make modified versions of XviD are not obligated
47     *  to grant this special exception for their modified versions; it is
48     *  their choice whether to do so.  The GNU General Public License gives
49     *  permission to release a modified version without this exception; this
50     *  exception also makes it possible to release a modified version which
51     *  carries forward this exception.
52     *
53     * $Id$
54     *
55     ****************************************************************************/
56    
57  #include "../utils/mem_transfer.h"  #include "../utils/mem_transfer.h"
58    
59  typedef void (INTERPOLATE8X8)(uint8_t * const dst,  typedef void (INTERPOLATE8X8)(uint8_t * const dst,
# Line 26  Line 82 
82  INTERPOLATE8X8 interpolate8x8_halfpel_v_3dn;  INTERPOLATE8X8 interpolate8x8_halfpel_v_3dn;
83  INTERPOLATE8X8 interpolate8x8_halfpel_hv_3dn;  INTERPOLATE8X8 interpolate8x8_halfpel_hv_3dn;
84    
85  static __inline void interpolate8x8_switch(uint8_t * const cur,  INTERPOLATE8X8 interpolate8x8_halfpel_h_ia64;
86    INTERPOLATE8X8 interpolate8x8_halfpel_v_ia64;
87    INTERPOLATE8X8 interpolate8x8_halfpel_hv_ia64;
88    
89    void interpolate8x8_c(uint8_t * const dst,
90                                              const uint8_t * const src,
91                                              const uint32_t x,
92                                              const uint32_t y,
93                                              const uint32_t stride);
94    
95    static __inline void
96    interpolate8x8_switch(uint8_t * const cur,
97                                       const uint8_t * const refn,                                       const uint8_t * const refn,
98                                       const uint32_t x, const uint32_t y,                                            const uint32_t x,
99                                           const int32_t dx,  const int dy,                                            const uint32_t y,
100                                              const int32_t dx,
101                                              const int dy,
102                                           const uint32_t stride,                                           const uint32_t stride,
103                                           const uint32_t rounding)                                           const uint32_t rounding)
104  {  {
105          int32_t ddx, ddy;          int32_t ddx, ddy;
106    
107          switch ( ((dx&1)<<1) + (dy&1) )   // ((dx%2)?2:0)+((dy%2)?1:0)          switch (((dx & 1) << 1) + (dy & 1))     /* ((dx%2)?2:0)+((dy%2)?1:0) */
108      {      {
109      case 0 :      case 0 :
110                  ddx = dx/2;                  ddx = dx/2;
111                  ddy = dy/2;                  ddy = dy/2;
112                  transfer8x8_copy(cur + y*stride + x, refn + (y+ddy)*stride + x + ddx, stride);                  transfer8x8_copy(cur + y * stride + x,
113                                                     refn + (int)((y + ddy) * stride + x + ddx), stride);
114                  break;                  break;
115    
116      case 1 :      case 1 :
117                  ddx = dx/2;                  ddx = dx/2;
118                  ddy = (dy-1)/2;                  ddy = (dy-1)/2;
119                  interpolate8x8_halfpel_v(cur + y*stride + x,                  interpolate8x8_halfpel_v(cur + y*stride + x,
120                                                          refn + (y+ddy)*stride + x + ddx, stride, rounding);                                                                   refn + (int)((y + ddy) * stride + x + ddx), stride,
121                                                                     rounding);
122                  break;                  break;
123    
124      case 2 :      case 2 :
125                  ddx = (dx-1)/2;                  ddx = (dx-1)/2;
126                  ddy = dy/2;                  ddy = dy/2;
127                  interpolate8x8_halfpel_h(cur + y*stride + x,                  interpolate8x8_halfpel_h(cur + y*stride + x,
128                                                          refn + (y+ddy)*stride + x + ddx, stride, rounding);                                                                   refn + (int)((y + ddy) * stride + x + ddx), stride,
129                                                                     rounding);
130                  break;                  break;
131    
132      default :      default :
133                  ddx = (dx-1)/2;                  ddx = (dx-1)/2;
134                  ddy = (dy-1)/2;                  ddy = (dy-1)/2;
135                  interpolate8x8_halfpel_hv(cur + y*stride + x,                  interpolate8x8_halfpel_hv(cur + y*stride + x,
136                                                          refn + (y+ddy)*stride + x + ddx, stride, rounding);                                                                   refn + (int)((y + ddy) * stride + x + ddx), stride,
137                                                                      rounding);
138                  break;                  break;
139      }      }
140  }  }
141    
   
 void interpolate8x8_c(uint8_t * const dst,  
                                         const uint8_t * const src,  
                                         const uint32_t x, const uint32_t y,  
                                         const uint32_t stride);  

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