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/*****************************************************************************
* motion.c : C motion compensation module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: motion.c,v 1.11 2001/11/28 15:08:05 massiot Exp $
*
* Authors: Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
* Michel Lespinasse <walken@zoy.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#define MODULE_NAME motion
#include "modules_inner.h"
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#include <stdlib.h> /* malloc(), free() */
#include <string.h>
#include "config.h"
#include "common.h" /* boolean_t, byte_t */
#include "intf_msg.h"
#include "threads.h"
#include "mtime.h"
#include "tests.h"
#include "modules.h"
#include "modules_export.h"
/*****************************************************************************
* Local and extern prototypes.
*****************************************************************************/
static void motion_getfunctions( function_list_t * p_function_list );
/*****************************************************************************
* Build configuration tree.
*****************************************************************************/
MODULE_CONFIG_START
ADD_WINDOW( "Configuration for motion compensation module" )
ADD_COMMENT( "Ha, ha -- nothing to configure yet" )
MODULE_CONFIG_STOP
MODULE_INIT_START
p_module->i_capabilities = MODULE_CAPABILITY_NULL
| MODULE_CAPABILITY_MOTION;
p_module->psz_longname = "motion compensation module";
MODULE_INIT_STOP
MODULE_ACTIVATE_START
motion_getfunctions( &p_module->p_functions->motion );
MODULE_ACTIVATE_STOP
MODULE_DEACTIVATE_START
MODULE_DEACTIVATE_STOP
/*****************************************************************************
* motion_Probe: tests probe the CPU and return a score
*****************************************************************************/
static int motion_Probe( probedata_t *p_data )
{
if( TestMethod( MOTION_METHOD_VAR, "motion" )
|| TestMethod( MOTION_METHOD_VAR, "c" ) )
{
return( 999 );
}
/* This module always works */
return( 50 );
}
/*****************************************************************************
* Simple motion compensation in C
*****************************************************************************/
#define avg2(a,b) ((a+b+1)>>1)
#define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
#define predict_(i) (ref[i])
#define predict_x(i) (avg2 (ref[i], ref[i+1]))
#define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
#define predict_xy(i) (avg4 (ref[i], ref[i+1], (ref+stride)[i], (ref+stride)[i+1]))
#define put(predictor,i) dest[i] = predictor (i)
#define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
// mc function template
#define MC_FUNC(op,xy) \
static void MC_##op##_##xy##16_c (yuv_data_t * dest, yuv_data_t * ref, \
int stride, int height) \
{ \
do { \
op (predict_##xy, 0); \
op (predict_##xy, 1); \
op (predict_##xy, 2); \
op (predict_##xy, 3); \
op (predict_##xy, 4); \
op (predict_##xy, 5); \
op (predict_##xy, 6); \
op (predict_##xy, 7); \
op (predict_##xy, 8); \
op (predict_##xy, 9); \
op (predict_##xy, 10); \
op (predict_##xy, 11); \
op (predict_##xy, 12); \
op (predict_##xy, 13); \
op (predict_##xy, 14); \
op (predict_##xy, 15); \
ref += stride; \
dest += stride; \
} while (--height); \
} \
static void MC_##op##_##xy##8_c (yuv_data_t * dest, yuv_data_t * ref, \
int stride, int height) \
{ \
do { \
op (predict_##xy, 0); \
op (predict_##xy, 1); \
op (predict_##xy, 2); \
op (predict_##xy, 3); \
op (predict_##xy, 4); \
op (predict_##xy, 5); \
op (predict_##xy, 6); \
op (predict_##xy, 7); \
ref += stride; \
dest += stride; \
} while (--height); \
}
// definitions of the actual mc functions
MC_FUNC (put,)
MC_FUNC (avg,)
MC_FUNC (put,x)
MC_FUNC (avg,x)
MC_FUNC (put,y)
MC_FUNC (avg,y)
MC_FUNC (put,xy)
MC_FUNC (avg,xy)
/*****************************************************************************
* Functions exported as capabilities. They are declared as static so that
* we don't pollute the namespace too much.
*****************************************************************************/
static void motion_getfunctions( function_list_t * p_function_list )
{
static void (* ppppf_motion[2][2][4])( yuv_data_t *, yuv_data_t *,
int, int ) =
{
{
/* Copying functions */
{
/* Width == 16 */
MC_put_16_c, MC_put_x16_c, MC_put_y16_c, MC_put_xy16_c
},
{
/* Width == 8 */
MC_put_8_c, MC_put_x8_c, MC_put_y8_c, MC_put_xy8_c
}
},
{
/* Averaging functions */
{
/* Width == 16 */
MC_avg_16_c, MC_avg_x16_c, MC_avg_y16_c, MC_avg_xy16_c
},
{
/* Width == 8 */
MC_avg_8_c, MC_avg_x8_c, MC_avg_y8_c, MC_avg_xy8_c
}
}
};
p_function_list->pf_probe = motion_Probe;
#define list p_function_list->functions.motion
memcpy( list.ppppf_motion, ppppf_motion, sizeof( void * ) * 16 );
#undef list
return;
}
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