1 /*****************************************************************************
2 * filter.c : filter_t helpers.
3 *****************************************************************************
4 * Copyright (C) 2009 Laurent Aimar
7 * Author: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
28 #include <vlc_common.h>
30 #include <vlc_filter.h>
32 filter_t *filter_NewBlend( vlc_object_t *p_this,
33 vlc_fourcc_t i_chroma_dst )
35 filter_t *p_blend = vlc_custom_create( p_this, sizeof(*p_blend),
36 VLC_OBJECT_GENERIC, "blend" );
40 es_format_Init( &p_blend->fmt_in, VIDEO_ES, 0 );
42 es_format_Init( &p_blend->fmt_out, VIDEO_ES, 0 );
44 p_blend->fmt_out.i_codec =
45 p_blend->fmt_out.video.i_chroma = i_chroma_dst;
47 /* The blend module will be loaded when needed with the real
49 p_blend->p_module = NULL;
52 vlc_object_attach( p_blend, p_this );
57 int filter_ConfigureBlend( filter_t *p_blend,
58 int i_dst_width, int i_dst_height,
59 const video_format_t *p_src )
62 if( p_blend->p_module &&
63 p_blend->fmt_in.video.i_chroma != p_src->i_chroma )
65 /* The chroma is not the same, we need to reload the blend module */
66 module_unneed( p_blend, p_blend->p_module );
67 p_blend->p_module = NULL;
72 p_blend->fmt_in.i_codec = p_src->i_chroma;
73 p_blend->fmt_in.video = *p_src;
76 p_blend->fmt_out.video.i_width =
77 p_blend->fmt_out.video.i_visible_width = i_dst_width;
78 p_blend->fmt_out.video.i_height =
79 p_blend->fmt_out.video.i_visible_height = i_dst_height;
82 if( !p_blend->p_module )
83 p_blend->p_module = module_need( p_blend, "video blending", NULL, false );
84 if( !p_blend->p_module )
89 int filter_Blend( filter_t *p_blend,
90 picture_t *p_dst, int i_dst_x, int i_dst_y,
91 const picture_t *p_src, int i_alpha )
93 if( !p_blend->p_module )
96 p_blend->pf_video_blend( p_blend, p_dst, p_src, i_dst_x, i_dst_y, i_alpha );
100 void filter_DeleteBlend( filter_t *p_blend )
102 if( p_blend->p_module )
103 module_unneed( p_blend, p_blend->p_module );
105 vlc_object_detach( p_blend );
106 vlc_object_release( p_blend );