Commit 825f056a authored by gbazin's avatar gbazin
Browse files

* modules/video_filter/scale.c: simple nearest neighbour rescaling module for YUVP/A (subpictures).

parent 30900418
......@@ -954,7 +954,7 @@ VLC_ADD_PLUGINS([trivial_mixer spdif_mixer float32_mixer])
VLC_ADD_PLUGINS([aout_file equalizer])
VLC_ADD_PLUGINS([i420_rgb i420_yuy2 i422_yuy2 i420_ymga])
VLC_ADD_PLUGINS([m3u id3 playlist export sgimb])
VLC_ADD_PLUGINS([rawvideo blend])
VLC_ADD_PLUGINS([rawvideo blend scale])
VLC_ADD_PLUGINS([wav araw subtitle adpcm a52sys dtssys au])
VLC_ADD_PLUGINS([access_file access_udp access_tcp access_http ipv4 access_mms])
VLC_ADD_PLUGINS([access_ftp access_directory sap http])
......
......@@ -9,4 +9,5 @@ SOURCES_motionblur = motionblur.c
SOURCES_logo = logo.c
SOURCES_deinterlace = deinterlace.c
SOURCES_blend = blend.c
SOURCES_blend = scale.c
noinst_HEADERS += filter_common.h
/*****************************************************************************
* resize.c: video scaling module for YUVP/A pictures
* Uses the low quality "nearest neighbour" algorithm.
*****************************************************************************
* Copyright (C) 2003 VideoLAN
* $Id$
*
* Author: Gildas Bazin <gbazin@videolan.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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <vlc/vlc.h>
#include <vlc/decoder.h>
#include "vlc_filter.h"
/*****************************************************************************
* filter_sys_t : filter descriptor
*****************************************************************************/
struct filter_sys_t
{
es_format_t fmt_in;
es_format_t fmt_out;
};
/****************************************************************************
* Local prototypes
****************************************************************************/
static int OpenFilter ( vlc_object_t * );
static void CloseFilter( vlc_object_t * );
static picture_t *Filter( filter_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("Video scaling filter") );
set_capability( "video filter2", 10000 );
set_callbacks( OpenFilter, CloseFilter );
vlc_module_end();
/*****************************************************************************
* 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->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','P') &&
p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','A') ) ||
p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
{
return VLC_EGENERIC;
}
/* Allocate the memory needed to store the decoder's structure */
if( ( p_filter->p_sys = p_sys =
(filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
{
msg_Err( p_filter, "out of memory" );
return VLC_EGENERIC;
}
p_filter->pf_video_filter = Filter;
msg_Dbg( p_filter, "%ix%i -> %ix%i", 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;
filter_sys_t *p_sys = p_filter->p_sys;
free( 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_pic_dst;
int i_plane, i, j, k, l;
/* Request output picture */
p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
if( !p_pic_dst )
{
msg_Warn( p_filter, "can't get output picture" );
return NULL;
}
for( i_plane = 0; i_plane < p_pic_dst->i_planes; i_plane++ )
{
uint8_t *p_src = p_pic->p[i_plane].p_pixels;
uint8_t *p_dst = p_pic_dst->p[i_plane].p_pixels;
int i_src_pitch = p_pic->p[i_plane].i_pitch;
int i_dst_pitch = p_pic_dst->p[i_plane].i_pitch;
for( i = 0; i < p_pic_dst->p[i_plane].i_visible_lines; i++ )
{
l = p_filter->fmt_in.video.i_height * i /
p_filter->fmt_out.video.i_height;
for( j = 0; j < p_pic_dst->p[i_plane].i_visible_pitch; j++ )
{
k = p_filter->fmt_in.video.i_width * j /
p_filter->fmt_out.video.i_width;
p_dst[i * i_dst_pitch + j] = p_src[l * i_src_pitch + k];
}
}
}
p_pic_dst->date = p_pic->date;
p_pic_dst->b_force = p_pic->b_force;
p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
p_pic_dst->b_progressive = p_pic->b_progressive;
p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
p_pic->pf_release( p_pic );
return p_pic_dst;
}
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