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vlc/modules/video_filter/croppadd.c
Rémi Denis-Courmont 231b08e802 Remove dummy plugin config item parameter
2011-05-13 23:20:55 +03:00

306 lines
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/*****************************************************************************
* croppadd.c: Crop/Padd image filter
*****************************************************************************
* Copyright (C) 2008 the VideoLAN team
* $Id$
*
* Authors: Antoine Cellerier <dionoea @t videolan dot 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 <limits.h> /* INT_MAX */
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_filter.h>
#include "filter_picture.h"
/****************************************************************************
* Local prototypes
****************************************************************************/
static int OpenFilter ( vlc_object_t * );
static void CloseFilter( vlc_object_t * );
static picture_t *Filter( filter_t *, picture_t * );
#define CROPTOP_TEXT N_( "Pixels to crop from top" )
#define CROPTOP_LONGTEXT N_( \
"Number of pixels to crop from the top of the image." )
#define CROPBOTTOM_TEXT N_( "Pixels to crop from bottom" )
#define CROPBOTTOM_LONGTEXT N_( \
"Number of pixels to crop from the bottom of the image." )
#define CROPLEFT_TEXT N_( "Pixels to crop from left" )
#define CROPLEFT_LONGTEXT N_( \
"Number of pixels to crop from the left of the image." )
#define CROPRIGHT_TEXT N_( "Pixels to crop from right" )
#define CROPRIGHT_LONGTEXT N_( \
"Number of pixels to crop from the right of the image." )
#define PADDTOP_TEXT N_( "Pixels to padd to top" )
#define PADDTOP_LONGTEXT N_( \
"Number of pixels to padd to the top of the image after cropping." )
#define PADDBOTTOM_TEXT N_( "Pixels to padd to bottom" )
#define PADDBOTTOM_LONGTEXT N_( \
"Number of pixels to padd to the bottom of the image after cropping." )
#define PADDLEFT_TEXT N_( "Pixels to padd to left" )
#define PADDLEFT_LONGTEXT N_( \
"Number of pixels to padd to the left of the image after cropping." )
#define PADDRIGHT_TEXT N_( "Pixels to padd to right" )
#define PADDRIGHT_LONGTEXT N_( \
"Number of pixels to padd to the right of the image after cropping." )
#define CFG_PREFIX "croppadd-"
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin ()
set_shortname( N_("Cropadd") )
set_description( N_("Video scaling filter") )
set_capability( "video filter2", 0 )
set_callbacks( OpenFilter, CloseFilter )
set_category( CAT_VIDEO )
set_subcategory( SUBCAT_VIDEO_VFILTER );
set_section( N_("Crop"), NULL )
add_integer_with_range( CFG_PREFIX "croptop", 0, 0, INT_MAX,
CROPTOP_TEXT, CROPTOP_LONGTEXT, false )
add_integer_with_range( CFG_PREFIX "cropbottom", 0, 0, INT_MAX,
CROPBOTTOM_TEXT, CROPBOTTOM_LONGTEXT, false )
add_integer_with_range( CFG_PREFIX "cropleft", 0, 0, INT_MAX,
CROPLEFT_TEXT, CROPLEFT_LONGTEXT, false )
add_integer_with_range( CFG_PREFIX "cropright", 0, 0, INT_MAX,
CROPRIGHT_TEXT, CROPRIGHT_LONGTEXT, false )
set_section( N_("Padd"), NULL )
add_integer_with_range( CFG_PREFIX "paddtop", 0, 0, INT_MAX,
PADDTOP_TEXT, PADDTOP_LONGTEXT, false )
add_integer_with_range( CFG_PREFIX "paddbottom", 0, 0, INT_MAX,
PADDBOTTOM_TEXT, PADDBOTTOM_LONGTEXT, false )
add_integer_with_range( CFG_PREFIX "paddleft", 0, 0, INT_MAX,
PADDLEFT_TEXT, PADDLEFT_LONGTEXT, false )
add_integer_with_range( CFG_PREFIX "paddright", 0, 0, INT_MAX,
PADDRIGHT_TEXT, PADDRIGHT_LONGTEXT, false )
vlc_module_end ()
static const char *const ppsz_filter_options[] = {
"croptop", "cropbottom", "cropleft", "cropright",
"paddtop", "paddbottom", "paddleft", "paddright",
NULL
};
struct filter_sys_t
{
int i_croptop;
int i_cropbottom;
int i_cropleft;
int i_cropright;
int i_paddtop;
int i_paddbottom;
int i_paddleft;
int i_paddright;
};
/*****************************************************************************
* OpenFilter: probe the filter and return score
*****************************************************************************/
static int OpenFilter( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t*)p_this;
filter_sys_t *p_sys;
if( !p_filter->b_allow_fmt_out_change )
{
msg_Err( p_filter, "Picture format change isn't allowed" );
return VLC_EGENERIC;
}
if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
{
msg_Err( p_filter, "Input and output chromas don't match" );
/* In fact we don't really care about this since we're allowed
* to change the output format ... FIXME? */
return VLC_EGENERIC;
}
p_filter->p_sys = (filter_sys_t *)malloc( sizeof( filter_sys_t ) );
if( !p_filter->p_sys ) return VLC_ENOMEM;
config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
p_filter->p_cfg );
p_sys = p_filter->p_sys;
#define GET_OPTION( name ) \
p_sys->i_ ## name = var_CreateGetInteger( p_filter, CFG_PREFIX #name ); \
if( p_sys->i_ ## name & 1 ) \
msg_Warn( p_filter, "Using even values for `" #name "' is recommended" );
GET_OPTION( croptop )
GET_OPTION( cropbottom )
GET_OPTION( cropleft )
GET_OPTION( cropright )
GET_OPTION( paddtop )
GET_OPTION( paddbottom )
GET_OPTION( paddleft )
GET_OPTION( paddright )
p_filter->fmt_out.video.i_height =
p_filter->fmt_out.video.i_visible_height =
p_filter->fmt_in.video.i_visible_height
- p_sys->i_croptop - p_sys->i_cropbottom
+ p_sys->i_paddtop + p_sys->i_paddbottom;
p_filter->fmt_out.video.i_width =
p_filter->fmt_out.video.i_visible_width =
p_filter->fmt_in.video.i_visible_width
- p_sys->i_cropleft - p_sys->i_cropright
+ p_sys->i_paddleft + p_sys->i_paddright;
p_filter->pf_video_filter = Filter;
msg_Dbg( p_filter, "Crop: Top: %d, Bottom: %d, Left: %d, Right: %d",
p_sys->i_croptop, p_sys->i_cropbottom, p_sys->i_cropleft,
p_sys->i_cropright );
msg_Dbg( p_filter, "Padd: Top: %d, Bottom: %d, Left: %d, Right: %d",
p_sys->i_paddtop, p_sys->i_paddbottom, p_sys->i_paddleft,
p_sys->i_paddright );
msg_Dbg( p_filter, "%dx%d -> %dx%d",
p_filter->fmt_in.video.i_width,
p_filter->fmt_in.video.i_height,
p_filter->fmt_out.video.i_width,
p_filter->fmt_out.video.i_height );
return VLC_SUCCESS;
}
/*****************************************************************************
* CloseFilter: clean up the filter
*****************************************************************************/
static void CloseFilter( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
free( p_filter->p_sys );
}
/****************************************************************************
* Filter: the whole thing
****************************************************************************/
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
{
filter_sys_t *p_sys = p_filter->p_sys;
picture_t *p_outpic;
int i_plane;
int i_width, i_height, i_xcrop, i_ycrop,
i_outwidth, i_outheight, i_xpadd, i_ypadd;
const int p_padd_color[] = { 0x00, 0x80, 0x80, 0xff };
if( !p_pic ) return NULL;
/* Request output picture */
p_outpic = filter_NewPicture( p_filter );
if( !p_outpic )
{
picture_Release( p_pic );
return NULL;
}
for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
/* p_pic and p_outpic have the same chroma/number of planes but that's
* about it. */
{
plane_t *p_plane = p_pic->p+i_plane;
plane_t *p_outplane = p_outpic->p+i_plane;
uint8_t *p_in = p_plane->p_pixels;
uint8_t *p_out = p_outplane->p_pixels;
int i_pixel_pitch = p_plane->i_pixel_pitch;
int i_padd_color = i_plane > 3 ? p_padd_color[0]
: p_padd_color[i_plane];
/* These assignments assume that the first plane always has
* a width and height equal to the picture's */
i_width = ( ( p_filter->fmt_in.video.i_visible_width
- p_sys->i_cropleft - p_sys->i_cropright )
* p_plane->i_visible_pitch )
/ p_pic->p->i_visible_pitch;
i_height = ( ( p_filter->fmt_in.video.i_visible_height
- p_sys->i_croptop - p_sys->i_cropbottom )
* p_plane->i_visible_lines )
/ p_pic->p->i_visible_lines;
i_xcrop = ( p_sys->i_cropleft * p_plane->i_visible_pitch)
/ p_pic->p->i_visible_pitch;
i_ycrop = ( p_sys->i_croptop * p_plane->i_visible_lines)
/ p_pic->p->i_visible_lines;
i_outwidth = ( p_filter->fmt_out.video.i_visible_width
* p_outplane->i_visible_pitch )
/ p_outpic->p->i_visible_pitch;
i_outheight = ( p_filter->fmt_out.video.i_visible_height
* p_outplane->i_visible_lines )
/ p_outpic->p->i_visible_lines;
i_xpadd = ( p_sys->i_paddleft * p_outplane->i_visible_pitch )
/ p_outpic->p->i_visible_pitch;
i_ypadd = ( p_sys->i_paddtop * p_outplane->i_visible_lines )
/ p_outpic->p->i_visible_lines;
/* Crop the top */
p_in += i_ycrop * p_plane->i_pitch;
/* Padd on the top */
vlc_memset( p_out, i_padd_color, i_ypadd * p_outplane->i_pitch );
p_out += i_ypadd * p_outplane->i_pitch;
int i_line;
for( i_line = 0; i_line < i_height; i_line++ )
{
uint8_t *p_in_next = p_in + p_plane->i_pitch;
uint8_t *p_out_next = p_out + p_outplane->i_pitch;
/* Crop on the left */
p_in += i_xcrop * i_pixel_pitch;
/* Padd on the left */
vlc_memset( p_out, i_padd_color, i_xpadd * i_pixel_pitch );
p_out += i_xpadd * i_pixel_pitch;
/* Copy the image and crop on the right */
vlc_memcpy( p_out, p_in, i_width * i_pixel_pitch );
p_out += i_width * i_pixel_pitch;
p_in += i_width * i_pixel_pitch;
/* Padd on the right */
vlc_memset( p_out, i_padd_color,
( i_outwidth - i_xpadd - i_width ) * i_pixel_pitch );
/* Got to begining of the next line */
p_in = p_in_next;
p_out = p_out_next;
}
/* Padd on the bottom */
vlc_memset( p_out, i_padd_color,
( i_outheight - i_ypadd - i_height ) * p_outplane->i_pitch );
}
return CopyInfoAndRelease( p_outpic, p_pic );
}
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