libmpeg2/motion_comp.c

   1 /*
   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  * Modified for use with MPlayer, see libmpeg-0.4.0.diff for the exact changes.
  24  * detailed CVS changelog at http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
  25  * $Id$
  26  */
  27
  28 #include "config.h"
  29
  30 #include <inttypes.h>
  31
  32 #include "mpeg2.h"
  33 #include "attributes.h"
  34 #include "mpeg2_internal.h"
  35
  36 mpeg2_mc_t mpeg2_mc;
  37
  38 void mpeg2_mc_init (uint32_t accel)
  39 {
  40 #if defined(ARCH_X86) || defined(ARCH_X86_64)
  41     if (accel & MPEG2_ACCEL_X86_MMXEXT)
  42         mpeg2_mc = mpeg2_mc_mmxext;
  43     else if (accel & MPEG2_ACCEL_X86_3DNOW)
  44         mpeg2_mc = mpeg2_mc_3dnow;
  45     else if (accel & MPEG2_ACCEL_X86_MMX)
  46         mpeg2_mc = mpeg2_mc_mmx;
  47     else
  48 #endif
  49 #if defined(ARCH_PPC) && defined(HAVE_ALTIVEC)
  50     if (accel & MPEG2_ACCEL_PPC_ALTIVEC)
  51         mpeg2_mc = mpeg2_mc_altivec;
  52     else
  53 #endif
  54 #ifdef ARCH_ALPHA
  55     if (accel & MPEG2_ACCEL_ALPHA)
  56         mpeg2_mc = mpeg2_mc_alpha;
  57     else
  58 #endif
  59 #if defined(ARCH_SPARC) && defined(HAVE_VIS)
  60     if (accel & MPEG2_ACCEL_SPARC_VIS)
  61         mpeg2_mc = mpeg2_mc_vis;
  62     else
  63 #endif
  64         mpeg2_mc = mpeg2_mc_c;
  65 }
  66
  67 #define avg2(a,b) ((a+b+1)>>1)
  68 #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
  69
  70 #define predict_o(i) (ref[i])
  71 #define predict_x(i) (avg2 (ref[i], ref[i+1]))
  72 #define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
  73 #define predict_xy(i) (avg4 (ref[i], ref[i+1], \
  74                              (ref+stride)[i], (ref+stride)[i+1]))
  75
  76 #define put(predictor,i) dest[i] = predictor (i)
  77 #define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
  78
  79 /* mc function template */
  80
  81 #define MC_FUNC(op,xy)                                                  \
  82 static void MC_##op##_##xy##_16_c (uint8_t * dest, const uint8_t * ref, \
  83                                    const int stride, int height)        \
  84 {                                                                       \
  85     do {                                                                \
  86         op (predict_##xy, 0);                                           \
  87         op (predict_##xy, 1);                                           \
  88         op (predict_##xy, 2);                                           \
  89         op (predict_##xy, 3);                                           \
  90         op (predict_##xy, 4);                                           \
  91         op (predict_##xy, 5);                                           \
  92         op (predict_##xy, 6);                                           \
  93         op (predict_##xy, 7);                                           \
  94         op (predict_##xy, 8);                                           \
  95         op (predict_##xy, 9);                                           \
  96         op (predict_##xy, 10);                                          \
  97         op (predict_##xy, 11);                                          \
  98         op (predict_##xy, 12);                                          \
  99         op (predict_##xy, 13);                                          \
 100         op (predict_##xy, 14);                                          \
 101         op (predict_##xy, 15);                                          \
 102         ref += stride;                                                  \
 103         dest += stride;                                                 \
 104     } while (--height);                                                 \
 105 }                                                                       \
 106 static void MC_##op##_##xy##_8_c (uint8_t * dest, const uint8_t * ref,  \
 107                                   const int stride, int height)         \
 108 {                                                                       \
 109     do {                                                                \
 110         op (predict_##xy, 0);                                           \
 111         op (predict_##xy, 1);                                           \
 112         op (predict_##xy, 2);                                           \
 113         op (predict_##xy, 3);                                           \
 114         op (predict_##xy, 4);                                           \
 115         op (predict_##xy, 5);                                           \
 116         op (predict_##xy, 6);                                           \
 117         op (predict_##xy, 7);                                           \
 118         ref += stride;                                                  \
 119         dest += stride;                                                 \
 120     } while (--height);                                                 \
 121 }
 122
 123 /* definitions of the actual mc functions */
 124
 125 MC_FUNC (put,o)
 126 MC_FUNC (avg,o)
 127 MC_FUNC (put,x)
 128 MC_FUNC (avg,x)
 129 MC_FUNC (put,y)
 130 MC_FUNC (avg,y)
 131 MC_FUNC (put,xy)
 132 MC_FUNC (avg,xy)
 133
 134 MPEG2_MC_EXTERN (c)