git.sesse.net Git - vlc/blob - plugins/motion/motion.c

   1 /*****************************************************************************
   2  * motion.c : C motion compensation module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001 VideoLAN
   5  * $Id: motion.c,v 1.9 2001/08/22 17:21:45 massiot Exp $
   6  *
   7  * Authors: Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
   8  *          Michel Lespinasse <walken@zoy.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it 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, USA.
  23  *****************************************************************************/
  24
  25 #define MODULE_NAME motion
  26 #include "modules_inner.h"
  27
  28 /*****************************************************************************
  29  * Preamble
  30  *****************************************************************************/
  31 #include "defs.h"
  32
  33 #include <stdlib.h>                                      /* malloc(), free() */
  34
  35 #include "config.h"
  36 #include "common.h"                                     /* boolean_t, byte_t */
  37 #include "threads.h"
  38 #include "mtime.h"
  39 #include "tests.h"
  40
  41 #include "modules.h"
  42 #include "modules_export.h"
  43
  44 /*****************************************************************************
  45  * Local and extern prototypes.
  46  *****************************************************************************/
  47 static void motion_getfunctions( function_list_t * p_function_list );
  48
  49 /*****************************************************************************
  50  * Build configuration tree.
  51  *****************************************************************************/
  52 MODULE_CONFIG_START
  53 ADD_WINDOW( "Configuration for motion compensation module" )
  54     ADD_COMMENT( "Ha, ha -- nothing to configure yet" )
  55 MODULE_CONFIG_STOP
  56
  57 MODULE_INIT_START
  58     p_module->i_capabilities = MODULE_CAPABILITY_NULL
  59                                 | MODULE_CAPABILITY_MOTION;
  60     p_module->psz_longname = "motion compensation module";
  61 MODULE_INIT_STOP
  62
  63 MODULE_ACTIVATE_START
  64     motion_getfunctions( &p_module->p_functions->motion );
  65 MODULE_ACTIVATE_STOP
  66
  67 MODULE_DEACTIVATE_START
  68 MODULE_DEACTIVATE_STOP
  69
  70 /*****************************************************************************
  71  * motion_Probe: tests probe the CPU and return a score
  72  *****************************************************************************/
  73 static int motion_Probe( probedata_t *p_data )
  74 {
  75     if( TestMethod( MOTION_METHOD_VAR, "motion" )
  76          || TestMethod( MOTION_METHOD_VAR, "c" ) )
  77     {
  78         return( 999 );
  79     }
  80
  81     /* This module always works */
  82     return( 50 );
  83 }
  84
  85 /*****************************************************************************
  86  * Simple motion compensation in C
  87  *****************************************************************************/
  88
  89 #define avg2(a,b) ((a+b+1)>>1)
  90 #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
  91
  92 #define predict_(i) (ref[i])
  93 #define predict_x(i) (avg2 (ref[i], ref[i+1]))
  94 #define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
  95 #define predict_xy(i) (avg4 (ref[i], ref[i+1], (ref+stride)[i], (ref+stride)[i+1]))
  96
  97 #define put(predictor,i) dest[i] = predictor (i)
  98 #define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
  99
 100 // mc function template
 101
 102 #define MC_FUNC(op,xy)                                                                                \
 103 static void MC_##op##_##xy##16_c (yuv_data_t * dest, yuv_data_t * ref,      \
 104                                  int stride, int height)                    \
 105 {                                                                           \
 106     do {                                                                    \
 107         op (predict_##xy, 0);                                               \
 108         op (predict_##xy, 1);                                               \
 109         op (predict_##xy, 2);                                               \
 110         op (predict_##xy, 3);                                               \
 111         op (predict_##xy, 4);                                               \
 112         op (predict_##xy, 5);                                               \
 113         op (predict_##xy, 6);                                               \
 114         op (predict_##xy, 7);                                               \
 115         op (predict_##xy, 8);                                               \
 116         op (predict_##xy, 9);                                               \
 117         op (predict_##xy, 10);                                              \
 118         op (predict_##xy, 11);                                              \
 119         op (predict_##xy, 12);                                              \
 120         op (predict_##xy, 13);                                              \
 121         op (predict_##xy, 14);                                              \
 122         op (predict_##xy, 15);                                              \
 123         ref += stride;                                                      \
 124         dest += stride;                                                     \
 125     } while (--height);                                                     \
 126 }                                                                           \
 127 static void MC_##op##_##xy##8_c (yuv_data_t * dest, yuv_data_t * ref,       \
 128                                 int stride, int height)                     \
 129 {                                                                           \
 130     do {                                                                    \
 131         op (predict_##xy, 0);                                               \
 132         op (predict_##xy, 1);                                               \
 133         op (predict_##xy, 2);                                               \
 134         op (predict_##xy, 3);                                               \
 135         op (predict_##xy, 4);                                               \
 136         op (predict_##xy, 5);                                               \
 137         op (predict_##xy, 6);                                               \
 138         op (predict_##xy, 7);                                               \
 139         ref += stride;                                                      \
 140         dest += stride;                                                     \
 141     } while (--height);                                                     \
 142 }
 143
 144 // definitions of the actual mc functions
 145
 146 MC_FUNC (put,)
 147 MC_FUNC (avg,)
 148 MC_FUNC (put,x)
 149 MC_FUNC (avg,x)
 150 MC_FUNC (put,y)
 151 MC_FUNC (avg,y)
 152 MC_FUNC (put,xy)
 153 MC_FUNC (avg,xy)
 154
 155 /*****************************************************************************
 156  * Functions exported as capabilities. They are declared as static so that
 157  * we don't pollute the namespace too much.
 158  *****************************************************************************/
 159 static void motion_getfunctions( function_list_t * p_function_list )
 160 {
 161     static void (* ppppf_motion[2][2][4])( yuv_data_t *, yuv_data_t *,
 162                                            int, int ) =
 163     {
 164         {
 165             /* Copying functions */
 166             {
 167                 /* Width == 16 */
 168                 MC_put_16_c, MC_put_x16_c, MC_put_y16_c, MC_put_xy16_c
 169             },
 170             {
 171                 /* Width == 8 */
 172                 MC_put_8_c,  MC_put_x8_c,  MC_put_y8_c, MC_put_xy8_c
 173             }
 174         },
 175         {
 176             /* Averaging functions */
 177             {
 178                 /* Width == 16 */
 179                 MC_avg_16_c, MC_avg_x16_c, MC_avg_y16_c, MC_avg_xy16_c
 180             },
 181             {
 182                 /* Width == 8 */
 183                 MC_avg_8_c,  MC_avg_x8_c,  MC_avg_y8_c,  MC_avg_xy8_c
 184             }
 185         }
 186     };
 187
 188     p_function_list->pf_probe = motion_Probe;
 189
 190 #define list p_function_list->functions.motion
 191     memcpy( list.ppppf_motion, ppppf_motion, sizeof( void * ) * 16 );
 192 #undef list
 193
 194     return;
 195 }