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 1.10 2001/09/06 14:02:56 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 #include <string.h>
  35
  36 #include "config.h"
  37 #include "common.h"                                     /* boolean_t, byte_t */
  38 #include "threads.h"
  39 #include "mtime.h"
  40 #include "tests.h"
  41
  42 #include "modules.h"
  43 #include "modules_export.h"
  44
  45 /*****************************************************************************
  46  * Local and extern prototypes.
  47  *****************************************************************************/
  48 static void motion_getfunctions( function_list_t * p_function_list );
  49
  50 /*****************************************************************************
  51  * Build configuration tree.
  52  *****************************************************************************/
  53 MODULE_CONFIG_START
  54 ADD_WINDOW( "Configuration for motion compensation module" )
  55     ADD_COMMENT( "Ha, ha -- nothing to configure yet" )
  56 MODULE_CONFIG_STOP
  57
  58 MODULE_INIT_START
  59     p_module->i_capabilities = MODULE_CAPABILITY_NULL
  60                                 | MODULE_CAPABILITY_MOTION;
  61     p_module->psz_longname = "motion compensation module";
  62 MODULE_INIT_STOP
  63
  64 MODULE_ACTIVATE_START
  65     motion_getfunctions( &p_module->p_functions->motion );
  66 MODULE_ACTIVATE_STOP
  67
  68 MODULE_DEACTIVATE_START
  69 MODULE_DEACTIVATE_STOP
  70
  71 /*****************************************************************************
  72  * motion_Probe: tests probe the CPU and return a score
  73  *****************************************************************************/
  74 static int motion_Probe( probedata_t *p_data )
  75 {
  76     if( TestMethod( MOTION_METHOD_VAR, "motion" )
  77          || TestMethod( MOTION_METHOD_VAR, "c" ) )
  78     {
  79         return( 999 );
  80     }
  81
  82     /* This module always works */
  83     return( 50 );
  84 }
  85
  86 /*****************************************************************************
  87  * Simple motion compensation in C
  88  *****************************************************************************/
  89
  90 #define avg2(a,b) ((a+b+1)>>1)
  91 #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
  92
  93 #define predict_(i) (ref[i])
  94 #define predict_x(i) (avg2 (ref[i], ref[i+1]))
  95 #define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
  96 #define predict_xy(i) (avg4 (ref[i], ref[i+1], (ref+stride)[i], (ref+stride)[i+1]))
  97
  98 #define put(predictor,i) dest[i] = predictor (i)
  99 #define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
 100
 101 // mc function template
 102
 103 #define MC_FUNC(op,xy)                                                                                \
 104 static void MC_##op##_##xy##16_c (yuv_data_t * dest, yuv_data_t * ref,      \
 105                                  int stride, int height)                    \
 106 {                                                                           \
 107     do {                                                                    \
 108         op (predict_##xy, 0);                                               \
 109         op (predict_##xy, 1);                                               \
 110         op (predict_##xy, 2);                                               \
 111         op (predict_##xy, 3);                                               \
 112         op (predict_##xy, 4);                                               \
 113         op (predict_##xy, 5);                                               \
 114         op (predict_##xy, 6);                                               \
 115         op (predict_##xy, 7);                                               \
 116         op (predict_##xy, 8);                                               \
 117         op (predict_##xy, 9);                                               \
 118         op (predict_##xy, 10);                                              \
 119         op (predict_##xy, 11);                                              \
 120         op (predict_##xy, 12);                                              \
 121         op (predict_##xy, 13);                                              \
 122         op (predict_##xy, 14);                                              \
 123         op (predict_##xy, 15);                                              \
 124         ref += stride;                                                      \
 125         dest += stride;                                                     \
 126     } while (--height);                                                     \
 127 }                                                                           \
 128 static void MC_##op##_##xy##8_c (yuv_data_t * dest, yuv_data_t * ref,       \
 129                                 int stride, int height)                     \
 130 {                                                                           \
 131     do {                                                                    \
 132         op (predict_##xy, 0);                                               \
 133         op (predict_##xy, 1);                                               \
 134         op (predict_##xy, 2);                                               \
 135         op (predict_##xy, 3);                                               \
 136         op (predict_##xy, 4);                                               \
 137         op (predict_##xy, 5);                                               \
 138         op (predict_##xy, 6);                                               \
 139         op (predict_##xy, 7);                                               \
 140         ref += stride;                                                      \
 141         dest += stride;                                                     \
 142     } while (--height);                                                     \
 143 }
 144
 145 // definitions of the actual mc functions
 146
 147 MC_FUNC (put,)
 148 MC_FUNC (avg,)
 149 MC_FUNC (put,x)
 150 MC_FUNC (avg,x)
 151 MC_FUNC (put,y)
 152 MC_FUNC (avg,y)
 153 MC_FUNC (put,xy)
 154 MC_FUNC (avg,xy)
 155
 156 /*****************************************************************************
 157  * Functions exported as capabilities. They are declared as static so that
 158  * we don't pollute the namespace too much.
 159  *****************************************************************************/
 160 static void motion_getfunctions( function_list_t * p_function_list )
 161 {
 162     static void (* ppppf_motion[2][2][4])( yuv_data_t *, yuv_data_t *,
 163                                            int, int ) =
 164     {
 165         {
 166             /* Copying functions */
 167             {
 168                 /* Width == 16 */
 169                 MC_put_16_c, MC_put_x16_c, MC_put_y16_c, MC_put_xy16_c
 170             },
 171             {
 172                 /* Width == 8 */
 173                 MC_put_8_c,  MC_put_x8_c,  MC_put_y8_c, MC_put_xy8_c
 174             }
 175         },
 176         {
 177             /* Averaging functions */
 178             {
 179                 /* Width == 16 */
 180                 MC_avg_16_c, MC_avg_x16_c, MC_avg_y16_c, MC_avg_xy16_c
 181             },
 182             {
 183                 /* Width == 8 */
 184                 MC_avg_8_c,  MC_avg_x8_c,  MC_avg_y8_c,  MC_avg_xy8_c
 185             }
 186         }
 187     };
 188
 189     p_function_list->pf_probe = motion_Probe;
 190
 191 #define list p_function_list->functions.motion
 192     memcpy( list.ppppf_motion, ppppf_motion, sizeof( void * ) * 16 );
 193 #undef list
 194
 195     return;
 196 }