[svn] / branches / dev-api-4 / xvidcore / src / motion / motion_comp.c Repository:
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revision 1141, Wed Sep 10 19:28:40 2003 UTC revision 1142, Wed Sep 10 22:19:00 2003 UTC
# Line 20  Line 20 
20   *  along with this program ; if not, write to the Free Software   *  along with this program ; if not, write to the Free Software
21   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22   *   *
23   * $Id: motion_comp.c,v 1.18.2.8 2003-08-22 15:52:35 Isibaar Exp $   * $Id: motion_comp.c,v 1.18.2.9 2003-09-10 22:19:00 edgomez Exp $
24   *   *
25   ****************************************************************************/   ****************************************************************************/
26    
# Line 66  Line 66 
66  #endif  #endif
67  }  }
68    
69    /*
70     * getref: calculate reference image pointer
71     * the decision to use interpolation h/v/hv or the normal image is
72     * based on dx & dy.
73     */
74    
75    static __inline const uint8_t *
76    get_ref(const uint8_t * const refn,
77                    const uint8_t * const refh,
78                    const uint8_t * const refv,
79                    const uint8_t * const refhv,
80                    const uint32_t x,
81                    const uint32_t y,
82                    const uint32_t block,
83                    const int32_t dx,
84                    const int32_t dy,
85                    const int32_t stride)
86    {
87            switch (((dx & 1) << 1) + (dy & 1)) {
88            case 0:
89                    return refn + (int) ((x * block + dx / 2) + (y * block + dy / 2) * stride);
90            case 1:
91                    return refv + (int) ((x * block + dx / 2) + (y * block + (dy - 1) / 2) * stride);
92            case 2:
93                    return refh + (int) ((x * block + (dx - 1) / 2) + (y * block + dy / 2) * stride);
94            default:
95                    return refhv + (int) ((x * block + (dx - 1) / 2) + (y * block + (dy - 1) / 2) * stride);
96            }
97    }
98    
99  static __inline void  static __inline void
100  compensate16x16_interpolate(int16_t * const dct_codes,  compensate16x16_interpolate(int16_t * const dct_codes,
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