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An motion blur filter. --blur-factor states the degree of blurring from 1

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to 127. about 100 is cool
This commit is contained in:
Sigmund Augdal Helberg 2002-08-26 22:35:58 +00:00
parent 8cdab6d597
commit d8e7b4081d
2 changed files with 301 additions and 0 deletions
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1
modules/video_filter/Makefile
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@ -4,3 +4,4 @@ distort_SOURCES = distort.c
wall_SOURCES = wall.c
clone_SOURCES = clone.c
crop_SOURCES = crop.c
motionblur_SOURCES = motionblur.c

300
modules/video_filter/motionblur.c Normal file
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@ -0,0 +1,300 @@
/*****************************************************************************
* motion_blur.c : motion blur filter for vlc
*****************************************************************************
* Copyright (C) 2000, 2001 VideoLAN
* $Id: motionblur.c,v 1.1 2002/08/26 22:35:58 sigmunau Exp $
*
* Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <errno.h>
#include <stdlib.h> /* malloc(), free() */
#include <string.h>
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include "filter_common.h"
/*****************************************************************************
* Local protypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy ( vlc_object_t * );
static int Init ( vout_thread_t * );
static void End ( vout_thread_t * );
static void Render ( vout_thread_t *, picture_t * );
static void RenderBlur ( vout_thread_t *, picture_t *, picture_t *, picture_t * );
static void CopyPicture ( vout_thread_t*, picture_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define MODE_TEXT N_("Blur factor")
#define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
vlc_module_begin();
add_category_hint( N_("Miscellaneous"), NULL );
add_integer( "blur-factor", 80, NULL, MODE_TEXT, MODE_LONGTEXT );
set_description( _("Motion blur filter") );
set_capability( "video filter", 0 );
set_callbacks( Create, Destroy );
vlc_module_end();
/*****************************************************************************
* vout_sys_t: Deinterlace video output method descriptor
*****************************************************************************
* This structure is part of the video output thread descriptor.
* It describes the Deinterlace specific properties of an output thread.
*****************************************************************************/
struct vout_sys_t
{
int i_factor; /* Deinterlace mode */
vlc_bool_t b_double_rate; /* Shall we double the framerate? */
mtime_t last_date;
mtime_t next_date;
vout_thread_t *p_vout;
picture_t *p_lastpic;
};
/*****************************************************************************
* Create: allocates Deinterlace video thread output method
*****************************************************************************
* This function allocates and initializes a Deinterlace vout method.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
/* Allocate structure */
p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
if( p_vout->p_sys == NULL )
{
msg_Err( p_vout, "out of memory" );
return 1;
}
p_vout->pf_init = Init;
p_vout->pf_end = End;
p_vout->pf_manage = NULL;
p_vout->pf_render = Render;
p_vout->pf_display = NULL;
p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
p_vout->p_sys->b_double_rate = 0;
p_vout->p_sys->last_date = 0;
p_vout->p_sys->p_lastpic = NULL;
return 0;
}
/*****************************************************************************
* Init: initialize Deinterlace video thread output method
*****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
int i_index;
picture_t *p_pic;
I_OUTPUTPICTURES = 0;
/* Initialize the output structure, full of directbuffers since we want
* the decoder to output directly to our structures. */
switch( p_vout->render.i_chroma )
{
case VLC_FOURCC('I','4','2','0'):
case VLC_FOURCC('I','Y','U','V'):
case VLC_FOURCC('Y','V','1','2'):
case VLC_FOURCC('I','4','2','2'):
p_vout->output.i_chroma = p_vout->render.i_chroma;
p_vout->output.i_width = p_vout->render.i_width;
p_vout->output.i_height = p_vout->render.i_height;
p_vout->output.i_aspect = p_vout->render.i_aspect;
break;
default:
return 0; /* unknown chroma */
break;
}
msg_Dbg( p_vout, "spawning the real video output" );
switch( p_vout->render.i_chroma )
{
case VLC_FOURCC('I','4','2','0'):
case VLC_FOURCC('I','Y','U','V'):
case VLC_FOURCC('Y','V','1','2'):
p_vout->p_sys->p_vout =
vout_CreateThread( p_vout,
p_vout->output.i_width, p_vout->output.i_height,
p_vout->output.i_chroma, p_vout->output.i_aspect );
break;
default:
break;
}
/* Everything failed */
if( p_vout->p_sys->p_vout == NULL )
{
msg_Err( p_vout, "cannot open vout, aborting" );
return 0;
}
ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
return 0;
}
/*****************************************************************************
* End: terminate Deinterlace video thread output method
*****************************************************************************/
static void End( vout_thread_t *p_vout )
{
int i_index;
/* Free the fake output buffers we allocated */
for( i_index = I_OUTPUTPICTURES ; i_index ; )
{
i_index--;
free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
}
}
/*****************************************************************************
* Destroy: destroy Deinterlace video thread output method
*****************************************************************************
* Terminate an output method created by DeinterlaceCreateOutputMethod
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
vout_DestroyThread( p_vout->p_sys->p_vout );
free( p_vout->p_sys );
}
/*****************************************************************************
* Render: displays previously rendered output
*****************************************************************************
* This function send the currently rendered image to Deinterlace image,
* waits until it is displayed and switch the two rendering buffers, preparing
* next frame.
*****************************************************************************/
static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
{
picture_t * p_outpic;
while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
== NULL )
{
if( p_vout->b_die || p_vout->b_error )
{
return;
}
msleep( VOUT_OUTMEM_SLEEP );
}
vout_DatePicture( p_vout, p_outpic, p_pic->date );
if ( p_vout->p_sys->p_lastpic == NULL )
{
/* Get a new picture */
while( ( p_vout->p_sys->p_lastpic =
vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
== NULL )
{
if( p_vout->b_die || p_vout->b_error )
{
return;
}
msleep( VOUT_OUTMEM_SLEEP );
}
CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
CopyPicture( p_vout, p_outpic, p_pic );
vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
return;
}
/* Get a new picture */
RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
/* Get a new picture */
while( ( p_vout->p_sys->p_lastpic =
vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
== NULL )
{
if( p_vout->b_die || p_vout->b_error )
{
return;
}
msleep( VOUT_OUTMEM_SLEEP );
}
CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
}
static void CopyPicture( vout_thread_t *p_vout,
picture_t *p_dest, picture_t *p_source)
{
int i_plane;
for( i_plane = 0 ; i_plane < p_dest->i_planes ; i_plane++ )
{
u8 *p_in, *p_out;
p_in = p_source->p[i_plane].p_pixels;
p_out = p_dest->p[i_plane].p_pixels;
p_vout->p_vlc->pf_memcpy( p_out, p_in,
p_dest->p[i_plane].i_pitch *
p_dest->p[i_plane].i_lines);
}
}
/*****************************************************************************
* RenderBob: renders a bob picture
*****************************************************************************/
static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
picture_t *p_newpic, picture_t *p_outpic )
{
int i_plane;
int i_oldfactor = p_vout->p_sys->i_factor;
int i_newfactor = 128 - p_vout->p_sys->i_factor;
for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
{
u8 *p_old, *p_new, *p_out, *p_out_end;
p_out = p_outpic->p[i_plane].p_pixels;
p_new = p_newpic->p[i_plane].p_pixels;
p_old = p_oldpic->p[i_plane].p_pixels;
p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
p_outpic->p[i_plane].i_lines;
while ( p_out < p_out_end +4 )
{
*p_out++ = (((*p_old++) * i_oldfactor) + ((*p_new++) * i_newfactor))>>7;
// *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
}
}
}