git.sesse.net Git - vlc/blob - modules/codec/xvmc/motion_comp.c

   1 /* $Id$
   2  * motion_comp.c
   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 #include "config.h"
  25
  26 #include <inttypes.h>
  27
  28 #include "mpeg2.h"
  29 #include "attributes.h"
  30 #include "mpeg2_internal.h"
  31
  32 mpeg2_mc_t mpeg2_mc;
  33
  34 void mpeg2_mc_init (uint32_t accel)
  35 {
  36     if (accel & MPEG2_ACCEL_X86_MMXEXT)
  37         mpeg2_mc = mpeg2_mc_mmxext;
  38     else if (accel & MPEG2_ACCEL_X86_3DNOW)
  39         mpeg2_mc = mpeg2_mc_3dnow;
  40     else if (accel & MPEG2_ACCEL_X86_MMX)
  41         mpeg2_mc = mpeg2_mc_mmx;
  42     else
  43         mpeg2_mc = mpeg2_mc_c;
  44 }
  45
  46 #define avg2(a,b) ((a+b+1)>>1)
  47 #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
  48
  49 #define predict_o(i) (ref[i])
  50 #define predict_x(i) (avg2 (ref[i], ref[i+1]))
  51 #define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
  52 #define predict_xy(i) (avg4 (ref[i], ref[i+1], \
  53                              (ref+stride)[i], (ref+stride)[i+1]))
  54
  55 #define put(predictor,i) dest[i] = predictor (i)
  56 #define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
  57
  58 /* mc function template */
  59
  60 #define MC_FUNC(op,xy)                                                  \
  61 static void MC_##op##_##xy##_16_c (uint8_t * dest, const uint8_t * ref, \
  62                                    const int stride, int height)        \
  63 {                                                                       \
  64     do {                                                                \
  65         op (predict_##xy, 0);                                           \
  66         op (predict_##xy, 1);                                           \
  67         op (predict_##xy, 2);                                           \
  68         op (predict_##xy, 3);                                           \
  69         op (predict_##xy, 4);                                           \
  70         op (predict_##xy, 5);                                           \
  71         op (predict_##xy, 6);                                           \
  72         op (predict_##xy, 7);                                           \
  73         op (predict_##xy, 8);                                           \
  74         op (predict_##xy, 9);                                           \
  75         op (predict_##xy, 10);                                          \
  76         op (predict_##xy, 11);                                          \
  77         op (predict_##xy, 12);                                          \
  78         op (predict_##xy, 13);                                          \
  79         op (predict_##xy, 14);                                          \
  80         op (predict_##xy, 15);                                          \
  81         ref += stride;                                                  \
  82         dest += stride;                                                 \
  83     } while (--height);                                                 \
  84 }                                                                       \
  85 static void MC_##op##_##xy##_8_c (uint8_t * dest, const uint8_t * ref,  \
  86                                   const int stride, int height)         \
  87 {                                                                       \
  88     do {                                                                \
  89         op (predict_##xy, 0);                                           \
  90         op (predict_##xy, 1);                                           \
  91         op (predict_##xy, 2);                                           \
  92         op (predict_##xy, 3);                                           \
  93         op (predict_##xy, 4);                                           \
  94         op (predict_##xy, 5);                                           \
  95         op (predict_##xy, 6);                                           \
  96         op (predict_##xy, 7);                                           \
  97         ref += stride;                                                  \
  98         dest += stride;                                                 \
  99     } while (--height);                                                 \
 100 }
 101
 102 /* definitions of the actual mc functions */
 103
 104 MC_FUNC (put,o)
 105 MC_FUNC (avg,o)
 106 MC_FUNC (put,x)
 107 MC_FUNC (avg,x)
 108 MC_FUNC (put,y)
 109 MC_FUNC (avg,y)
 110 MC_FUNC (put,xy)
 111 MC_FUNC (avg,xy)
 112
 113 MPEG2_MC_EXTERN (c)