mirror of
https://code.videolan.org/videolan/vlc
synced 2024-07-25 09:41:30 +02:00
223 lines
7.4 KiB
C
223 lines
7.4 KiB
C
/*****************************************************************************
|
|
* motionblur.c : motion blur filter for vlc
|
|
*****************************************************************************
|
|
* Copyright (C) 2000, 2001, 2002, 2003 the VideoLAN team
|
|
* $Id$
|
|
*
|
|
* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
|
|
* Antoine Cellerier <dionoea &t videolan d.t 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
|
|
*****************************************************************************/
|
|
|
|
/*****************************************************************************
|
|
* Preamble
|
|
*****************************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <vlc_common.h>
|
|
#include <vlc_plugin.h>
|
|
#include <vlc_sout.h>
|
|
#include <vlc_filter.h>
|
|
#include "filter_picture.h"
|
|
|
|
/*****************************************************************************
|
|
* Local protypes
|
|
*****************************************************************************/
|
|
static int Create ( vlc_object_t * );
|
|
static void Destroy ( vlc_object_t * );
|
|
static picture_t *Filter ( filter_t *, picture_t * );
|
|
static void RenderBlur ( filter_sys_t *, picture_t *, picture_t * );
|
|
static int MotionBlurCallback( vlc_object_t *, char const *,
|
|
vlc_value_t, vlc_value_t, void * );
|
|
|
|
/*****************************************************************************
|
|
* Module descriptor
|
|
*****************************************************************************/
|
|
#define FACTOR_TEXT N_("Blur factor (1-127)")
|
|
#define FACTOR_LONGTEXT N_("The degree of blurring from 1 to 127.")
|
|
|
|
#define FILTER_PREFIX "blur-"
|
|
|
|
vlc_module_begin ()
|
|
set_shortname( N_("Motion blur") )
|
|
set_description( N_("Motion blur filter") )
|
|
set_capability( "video filter2", 0 )
|
|
set_category( CAT_VIDEO )
|
|
set_subcategory( SUBCAT_VIDEO_VFILTER )
|
|
|
|
add_integer_with_range( FILTER_PREFIX "factor", 80, 1, 127,
|
|
FACTOR_TEXT, FACTOR_LONGTEXT, false )
|
|
|
|
add_shortcut( "blur" )
|
|
|
|
set_callbacks( Create, Destroy )
|
|
vlc_module_end ()
|
|
|
|
static const char *const ppsz_filter_options[] = {
|
|
"factor", NULL
|
|
};
|
|
|
|
/*****************************************************************************
|
|
* filter_sys_t
|
|
*****************************************************************************/
|
|
struct filter_sys_t
|
|
{
|
|
picture_t *p_tmp;
|
|
bool b_first;
|
|
|
|
vlc_spinlock_t lock;
|
|
int i_factor;
|
|
};
|
|
|
|
/*****************************************************************************
|
|
* Create
|
|
*****************************************************************************/
|
|
static int Create( vlc_object_t *p_this )
|
|
{
|
|
filter_t *p_filter = (filter_t *)p_this;
|
|
|
|
/* Allocate structure */
|
|
p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
|
|
if( p_filter->p_sys == NULL )
|
|
return VLC_ENOMEM;
|
|
|
|
p_filter->p_sys->p_tmp = picture_NewFromFormat( &p_filter->fmt_in.video );
|
|
if( !p_filter->p_sys->p_tmp )
|
|
{
|
|
free( p_filter->p_sys );
|
|
return VLC_ENOMEM;
|
|
}
|
|
p_filter->p_sys->b_first = true;
|
|
|
|
p_filter->pf_video_filter = Filter;
|
|
|
|
config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
|
|
p_filter->p_cfg );
|
|
|
|
p_filter->p_sys->i_factor =
|
|
var_CreateGetIntegerCommand( p_filter, FILTER_PREFIX "factor" );
|
|
vlc_spin_init( &p_filter->p_sys->lock );
|
|
var_AddCallback( p_filter, FILTER_PREFIX "factor",
|
|
MotionBlurCallback, p_filter->p_sys );
|
|
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Destroy
|
|
*****************************************************************************/
|
|
static void Destroy( vlc_object_t *p_this )
|
|
{
|
|
filter_t *p_filter = (filter_t *)p_this;
|
|
|
|
var_DelCallback( p_filter, FILTER_PREFIX "factor",
|
|
MotionBlurCallback, p_filter->p_sys );
|
|
vlc_spin_destroy( &p_filter->p_sys->lock );
|
|
|
|
picture_Release( p_filter->p_sys->p_tmp );
|
|
free( p_filter->p_sys );
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Filter
|
|
*****************************************************************************/
|
|
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
|
|
{
|
|
picture_t * p_outpic;
|
|
filter_sys_t *p_sys = p_filter->p_sys;
|
|
|
|
if( !p_pic ) return NULL;
|
|
|
|
p_outpic = filter_NewPicture( p_filter );
|
|
if( !p_outpic )
|
|
{
|
|
picture_Release( p_pic );
|
|
return NULL;
|
|
}
|
|
|
|
if( p_sys->b_first )
|
|
{
|
|
picture_CopyPixels( p_sys->p_tmp, p_pic );
|
|
p_sys->b_first = false;
|
|
}
|
|
|
|
/* Get a new picture */
|
|
RenderBlur( p_sys, p_pic, p_outpic );
|
|
|
|
picture_CopyPixels( p_sys->p_tmp, p_outpic );
|
|
|
|
return CopyInfoAndRelease( p_outpic, p_pic );
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* RenderBlur: renders a blurred picture
|
|
*****************************************************************************/
|
|
static void RenderBlur( filter_sys_t *p_sys, picture_t *p_newpic,
|
|
picture_t *p_outpic )
|
|
{
|
|
int i_plane;
|
|
vlc_spin_lock( &p_sys->lock );
|
|
const int i_oldfactor = p_sys->i_factor;
|
|
vlc_spin_unlock( &p_sys->lock );
|
|
int i_newfactor = 128 - i_oldfactor;
|
|
|
|
for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
|
|
{
|
|
uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
|
|
const int i_visible_pitch = p_outpic->p[i_plane].i_visible_pitch;
|
|
const int i_visible_lines = p_outpic->p[i_plane].i_visible_lines;
|
|
|
|
p_out = p_outpic->p[i_plane].p_pixels;
|
|
p_new = p_newpic->p[i_plane].p_pixels;
|
|
p_old = p_sys->p_tmp->p[i_plane].p_pixels;
|
|
p_out_end = p_out + p_outpic->p[i_plane].i_pitch * i_visible_lines;
|
|
while ( p_out < p_out_end )
|
|
{
|
|
p_out_line_end = p_out + i_visible_pitch;
|
|
|
|
while ( p_out < p_out_line_end )
|
|
{
|
|
*p_out++ = (((*p_old++) * i_oldfactor) +
|
|
((*p_new++) * i_newfactor)) >> 7;
|
|
}
|
|
|
|
p_old += p_sys->p_tmp->p[i_plane].i_pitch - i_visible_pitch;
|
|
p_new += p_newpic->p[i_plane].i_pitch - i_visible_pitch;
|
|
p_out += p_outpic->p[i_plane].i_pitch - i_visible_pitch;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int MotionBlurCallback( vlc_object_t *p_this, char const *psz_var,
|
|
vlc_value_t oldval, vlc_value_t newval,
|
|
void *p_data )
|
|
{
|
|
VLC_UNUSED(p_this); VLC_UNUSED(oldval);
|
|
filter_sys_t *p_sys = (filter_sys_t *)p_data;
|
|
|
|
if( !strcmp( psz_var, FILTER_PREFIX "factor" ) )
|
|
{
|
|
vlc_spin_lock( &p_sys->lock );
|
|
p_sys->i_factor = VLC_CLIP( newval.i_int, 1, 127 );
|
|
vlc_spin_unlock( &p_sys->lock );
|
|
}
|
|
return VLC_SUCCESS;
|
|
}
|