apps/plugins/mpegplayer/motion_comp.h

   1 /*
   2  * motion_comp.h
   3  * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
   4  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   5  *
   6  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
   7  * See http://libmpeg2.sourceforge.net/ for updates.
   8  *
   9  * mpeg2dec is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * mpeg2dec is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24
  25 #define avg2(a,b) ((a+b+1)>>1)
  26 #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
  27
  28 #define predict_o(i) (ref[i])
  29 #define predict_x(i) (avg2 (ref[i], ref[i+1]))
  30 #define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
  31 #define predict_xy(i) (avg4 (ref[i], ref[i+1], \
  32                              (ref+stride)[i], (ref+stride)[i+1]))
  33
  34 #define put(predictor,i) dest[i] = predictor (i)
  35 #define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
  36
  37 /* mc function template */
  38 #define MC_FUNC(op, xy) \
  39     MC_FUNC_16(op, xy) \
  40     MC_FUNC_8(op, xy)
  41
  42 #define MC_FUNC_16(op, xy) \
  43     void MC_##op##_##xy##_16 (uint8_t * dest, const uint8_t * ref, \
  44                               const int stride, int height)        \
  45     {                                                              \
  46         do {                                                       \
  47             op (predict_##xy, 0);                                  \
  48             op (predict_##xy, 1);                                  \
  49             op (predict_##xy, 2);                                  \
  50             op (predict_##xy, 3);                                  \
  51             op (predict_##xy, 4);                                  \
  52             op (predict_##xy, 5);                                  \
  53             op (predict_##xy, 6);                                  \
  54             op (predict_##xy, 7);                                  \
  55             op (predict_##xy, 8);                                  \
  56             op (predict_##xy, 9);                                  \
  57             op (predict_##xy, 10);                                 \
  58             op (predict_##xy, 11);                                 \
  59             op (predict_##xy, 12);                                 \
  60             op (predict_##xy, 13);                                 \
  61             op (predict_##xy, 14);                                 \
  62             op (predict_##xy, 15);                                 \
  63             ref += stride;                                         \
  64             dest += stride;                                        \
  65         } while (--height);                                        \
  66     }
  67
  68 #define MC_FUNC_8(op, xy) \
  69     void MC_##op##_##xy##_8 (uint8_t * dest, const uint8_t * ref, \
  70                              const int stride, int height)        \
  71     {                                                             \
  72         do {                                                      \
  73             op (predict_##xy, 0);                                 \
  74             op (predict_##xy, 1);                                 \
  75             op (predict_##xy, 2);                                 \
  76             op (predict_##xy, 3);                                 \
  77             op (predict_##xy, 4);                                 \
  78             op (predict_##xy, 5);                                 \
  79             op (predict_##xy, 6);                                 \
  80             op (predict_##xy, 7);                                 \
  81             ref += stride;                                        \
  82             dest += stride;                                       \
  83         } while (--height);                                       \
  84     }