mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-16 16:02:54 +02:00
733a686ea2
declare unused parameters in vlc callbacks as void deinterlace/RenderX() & motionblur/Copy(): remove unused argument
277 lines
9.8 KiB
C
277 lines
9.8 KiB
C
/*****************************************************************************
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* bluescreen.c : Bluescreen (weather channel like) video filter for vlc
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*****************************************************************************
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* Copyright (C) 2005-2007 the VideoLAN team
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* $Id$
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*
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* Authors: Antoine Cellerier <dionoea at videolan tod org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc/vlc.h>
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#include <vlc_vout.h>
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#include "vlc_filter.h"
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#define BLUESCREEN_HELP N_( \
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"This effect, also known as \"greenscreen\" or \"chroma key\" blends " \
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"the \"blue parts\" of the foreground image of the mosaic on the " \
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"background (like weather forcasts). You can choose the \"key\" " \
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"color for blending (blyyue by default)." )
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#define BLUESCREENU_TEXT N_("Bluescreen U value")
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#define BLUESCREENU_LONGTEXT N_( \
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"\"U\" value for the bluescreen key color " \
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"(in YUV values). From 0 to 255. Defaults to 120 for blue." )
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#define BLUESCREENV_TEXT N_("Bluescreen V value")
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#define BLUESCREENV_LONGTEXT N_( \
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"\"V\" value for the bluescreen key color " \
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"(in YUV values). From 0 to 255. Defaults to 90 for blue." )
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#define BLUESCREENUTOL_TEXT N_("Bluescreen U tolerance")
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#define BLUESCREENUTOL_LONGTEXT N_( \
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"Tolerance of the bluescreen blender " \
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"on color variations for the U plane. A value between 10 and 20 " \
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"seems sensible." )
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#define BLUESCREENVTOL_TEXT N_("Bluescreen V tolerance")
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#define BLUESCREENVTOL_LONGTEXT N_( \
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"Tolerance of the bluescreen blender " \
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"on color variations for the V plane. A value between 10 and 20 " \
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"seems sensible." )
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#define CFG_PREFIX "bluescreen-"
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Create ( vlc_object_t * );
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static void Destroy ( vlc_object_t * );
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static picture_t *Filter( filter_t *, picture_t * );
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static int BluescreenCallback( vlc_object_t *, char const *,
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vlc_value_t, vlc_value_t, void * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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vlc_module_begin();
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set_description( _("Bluescreen video filter") );
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set_shortname( _("Bluescreen" ));
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set_help( BLUESCREEN_HELP );
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set_category( CAT_VIDEO );
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set_subcategory( SUBCAT_VIDEO_VFILTER );
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set_capability( "video filter2", 0 );
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add_shortcut( "bluescreen" );
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set_callbacks( Create, Destroy );
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add_integer_with_range( CFG_PREFIX "u", 120, 0, 255, NULL,
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BLUESCREENU_TEXT, BLUESCREENU_LONGTEXT, VLC_FALSE );
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add_integer_with_range( CFG_PREFIX "v", 90, 0, 255, NULL,
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BLUESCREENV_TEXT, BLUESCREENV_LONGTEXT, VLC_FALSE );
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add_integer_with_range( CFG_PREFIX "ut", 17, 0, 255, NULL,
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BLUESCREENUTOL_TEXT, BLUESCREENUTOL_LONGTEXT,
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VLC_FALSE );
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add_integer_with_range( CFG_PREFIX "vt", 17, 0, 255, NULL,
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BLUESCREENVTOL_TEXT, BLUESCREENVTOL_LONGTEXT,
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VLC_FALSE );
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vlc_module_end();
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static const char *ppsz_filter_options[] = {
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"u", "v", "ut", "vt", NULL
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};
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struct filter_sys_t
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{
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int i_u, i_v, i_ut, i_vt;
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uint8_t *p_at;
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};
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static int Create( vlc_object_t *p_this )
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{
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filter_t *p_filter = (filter_t *)p_this;
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filter_sys_t *p_sys;
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if( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','U','V','A') )
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{
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msg_Err( p_filter,
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"Unsupported input chroma \"%4s\". "
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"Bluescreen can only use \"YUVA\".",
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(char*)&p_filter->fmt_in.video.i_chroma );
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return VLC_EGENERIC;
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}
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/* Allocate structure */
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p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
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if( p_filter->p_sys == NULL )
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{
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msg_Err( p_filter, "out of memory" );
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return VLC_ENOMEM;
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}
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p_sys = p_filter->p_sys;
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config_ChainParse( p_filter, CFG_PREFIX, ppsz_filter_options,
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p_filter->p_cfg );
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#define GET_VAR( name, min, max ) \
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p_sys->i_##name = __MIN( max, __MAX( min, \
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var_CreateGetIntegerCommand( p_filter, CFG_PREFIX #name ) ) ); \
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var_AddCallback( p_filter, CFG_PREFIX #name, BluescreenCallback, p_sys );
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GET_VAR( u, 0x00, 0xff );
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GET_VAR( v, 0x00, 0xff );
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GET_VAR( ut, 0x00, 0xff );
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GET_VAR( vt, 0x00, 0xff );
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p_sys->p_at = NULL;
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p_filter->pf_video_filter = Filter;
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return VLC_SUCCESS;
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}
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static void Destroy( vlc_object_t *p_this )
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{
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filter_t *p_filter = (filter_t *)p_this;
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free( p_filter->p_sys->p_at );
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free( p_filter->p_sys );
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}
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static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
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{
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filter_sys_t *p_sys = p_filter->p_sys;
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int i,j;
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int i_lines = p_pic->p[ A_PLANE ].i_lines;
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int i_pitch = p_pic->p[ A_PLANE ].i_pitch;
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uint8_t *p_a = p_pic->p[ A_PLANE ].p_pixels;
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uint8_t *p_at;
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uint8_t *p_u = p_pic->p[ U_PLANE ].p_pixels;
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uint8_t *p_v = p_pic->p[ V_PLANE ].p_pixels;
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uint8_t umin, umax, vmin, vmax;
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if( p_pic->format.i_chroma != VLC_FOURCC('Y','U','V','A') )
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{
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msg_Err( p_filter,
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"Unsupported input chroma \"%4s\". "
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"Bluescreen can only use \"YUVA\".",
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(char*)&p_pic->format.i_chroma );
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return NULL;
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}
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p_sys->p_at = realloc( p_sys->p_at, i_lines * i_pitch * sizeof( uint8_t ) );
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p_at = p_sys->p_at;
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umin = p_sys->i_u - p_sys->i_ut >= 0x00 ? p_sys->i_u - p_sys->i_ut : 0x00;
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umax = p_sys->i_u + p_sys->i_ut <= 0xff ? p_sys->i_u + p_sys->i_ut : 0xff;
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vmin = p_sys->i_v - p_sys->i_vt >= 0x00 ? p_sys->i_v - p_sys->i_vt : 0x00;
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vmax = p_sys->i_v + p_sys->i_vt <= 0xff ? p_sys->i_v + p_sys->i_vt : 0xff;
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for( i = 0; i < i_lines*i_pitch; i++ )
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{
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if( p_u[i] < umax && p_u[i] > umin
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&& p_v[i] < vmax && p_v[i] > vmin )
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{
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p_at[i] = 0x00;
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}
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else
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{
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p_at[i] = 0xff;
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}
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}
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/* Gaussian convolution to make it look cleaner */
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p_filter->p_libvlc->pf_memset( p_a, 0, 2 * i_pitch );
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for( i = 2; i < i_lines - 2; i++ )
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{
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p_a[i*i_pitch] = 0x00;
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p_a[i*i_pitch+1] = 0x00;
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for( j = 2; j < i_pitch - 2; j ++ )
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{
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p_a[i*i_pitch+j] = (uint8_t)((
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/* 2 rows up */
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( p_at[(i-2)*i_pitch+j-2]<<1 )
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+ ( p_at[(i-2)*i_pitch+j-1]<<2 )
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+ ( p_at[(i-2)*i_pitch+j]<<2 )
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+ ( p_at[(i-2)*i_pitch+j+1]<<2 )
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+ ( p_at[(i-2)*i_pitch+j+2]<<1 )
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/* 1 row up */
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+ ( p_at[(i-1)*i_pitch+j-2]<<2 )
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+ ( p_at[(i-1)*i_pitch+j-1]<<3 )
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+ ( p_at[(i-1)*i_pitch+j]*12 )
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+ ( p_at[(i-1)*i_pitch+j+1]<<3 )
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+ ( p_at[(i-1)*i_pitch+j+2]<<2 )
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/* */
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+ ( p_at[i*i_pitch+j-2]<<2 )
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+ ( p_at[i*i_pitch+j-1]*12 )
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+ ( p_at[i*i_pitch+j]<<4 )
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+ ( p_at[i*i_pitch+j+1]*12 )
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+ ( p_at[i*i_pitch+j+2]<<2 )
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/* 1 row down */
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+ ( p_at[(i+1)*i_pitch+j-2]<<2 )
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+ ( p_at[(i+1)*i_pitch+j-1]<<3 )
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+ ( p_at[(i+1)*i_pitch+j]*12 )
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+ ( p_at[(i+1)*i_pitch+j+1]<<3 )
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+ ( p_at[(i+1)*i_pitch+j+2]<<2 )
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/* 2 rows down */
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+ ( p_at[(i+2)*i_pitch+j-2]<<1 )
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+ ( p_at[(i+2)*i_pitch+j-1]<<2 )
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+ ( p_at[(i+2)*i_pitch+j]<<2 )
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+ ( p_at[(i+2)*i_pitch+j+1]<<2 )
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+ ( p_at[(i+2)*i_pitch+j+2]<<1 )
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)/152);
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if( p_a[i*i_pitch+j] < 0xbf ) p_a[i*i_pitch+j] = 0x00;
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}
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}
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return p_pic;
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}
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/*****************************************************************************
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* Callback to update params on the fly
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*****************************************************************************/
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static int BluescreenCallback( vlc_object_t *p_this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t newval,
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void *p_data )
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{
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VLC_UNUSED(p_this); VLC_UNUSED(oldval);
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filter_sys_t *p_sys = (filter_sys_t *) p_data;
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#define VAR_IS( a ) !strcmp( psz_var, CFG_PREFIX a )
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if( VAR_IS( "u" ) )
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{
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p_sys->i_u = __MAX( 0, __MIN( 255, newval.i_int ) );
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}
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else if( VAR_IS( "v" ) )
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{
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p_sys->i_v = __MAX( 0, __MIN( 255, newval.i_int ) );
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}
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else if( VAR_IS( "ut" ) )
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{
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p_sys->i_ut = __MAX( 0, __MIN( 255, newval.i_int ) );
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}
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else if( VAR_IS( "vt" ) )
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{
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p_sys->i_vt = __MAX( 0, __MIN( 255, newval.i_int ) );
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}
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return VLC_SUCCESS;
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}
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