LGPL
[vlc.git] / src / misc / filter.c
1 /*****************************************************************************
2  * filter.c : filter_t helpers.
3  *****************************************************************************
4  * Copyright (C) 2009 Laurent Aimar
5  * $Id$
6  *
7  * Author: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
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 Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public License
20  * along with this program; if not, write to the Free Software Foundation,
21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
27
28 #include <vlc_common.h>
29 #include <libvlc.h>
30 #include <vlc_filter.h>
31 #include <vlc_modules.h>
32
33 filter_t *filter_NewBlend( vlc_object_t *p_this,
34                            const video_format_t *p_dst_chroma )
35 {
36     filter_t *p_blend = vlc_custom_create( p_this, sizeof(*p_blend), "blend" );
37     if( !p_blend )
38         return NULL;
39
40     es_format_Init( &p_blend->fmt_in, VIDEO_ES, 0 );
41
42     es_format_Init( &p_blend->fmt_out, VIDEO_ES, 0 );
43
44     p_blend->fmt_out.i_codec        = 
45     p_blend->fmt_out.video.i_chroma = p_dst_chroma->i_chroma;
46     p_blend->fmt_out.video.i_rmask  = p_dst_chroma->i_rmask;
47     p_blend->fmt_out.video.i_gmask  = p_dst_chroma->i_gmask;
48     p_blend->fmt_out.video.i_bmask  = p_dst_chroma->i_bmask;
49     p_blend->fmt_out.video.i_rrshift= p_dst_chroma->i_rrshift;
50     p_blend->fmt_out.video.i_rgshift= p_dst_chroma->i_rgshift;
51     p_blend->fmt_out.video.i_rbshift= p_dst_chroma->i_rbshift;
52     p_blend->fmt_out.video.i_lrshift= p_dst_chroma->i_lrshift;
53     p_blend->fmt_out.video.i_lgshift= p_dst_chroma->i_lgshift;
54     p_blend->fmt_out.video.i_lbshift= p_dst_chroma->i_lbshift;
55
56     /* The blend module will be loaded when needed with the real
57     * input format */
58     p_blend->p_module = NULL;
59
60     return p_blend;
61 }
62
63 int filter_ConfigureBlend( filter_t *p_blend,
64                            int i_dst_width, int i_dst_height,
65                            const video_format_t *p_src )
66 {
67     /* */
68     if( p_blend->p_module &&
69         p_blend->fmt_in.video.i_chroma != p_src->i_chroma )
70     {
71         /* The chroma is not the same, we need to reload the blend module */
72         module_unneed( p_blend, p_blend->p_module );
73         p_blend->p_module = NULL;
74     }
75
76     /* */
77
78     p_blend->fmt_in.i_codec = p_src->i_chroma;
79     p_blend->fmt_in.video   = *p_src;
80
81     /* */
82     p_blend->fmt_out.video.i_width          =
83     p_blend->fmt_out.video.i_visible_width  = i_dst_width;
84     p_blend->fmt_out.video.i_height         =
85     p_blend->fmt_out.video.i_visible_height = i_dst_height;
86
87     /* */
88     if( !p_blend->p_module )
89         p_blend->p_module = module_need( p_blend, "video blending", NULL, false );
90     if( !p_blend->p_module )
91         return VLC_EGENERIC;
92     return VLC_SUCCESS;
93 }
94
95 int filter_Blend( filter_t *p_blend,
96                   picture_t *p_dst, int i_dst_x, int i_dst_y,
97                   const picture_t *p_src, int i_alpha )
98 {
99     if( !p_blend->p_module )
100         return VLC_EGENERIC;
101
102     p_blend->pf_video_blend( p_blend, p_dst, p_src, i_dst_x, i_dst_y, i_alpha );
103     return VLC_SUCCESS;
104 }
105
106 void filter_DeleteBlend( filter_t *p_blend )
107 {
108     if( p_blend->p_module )
109         module_unneed( p_blend, p_blend->p_module );
110
111     vlc_object_release( p_blend );
112 }
113
114 /* */
115 #include <vlc_video_splitter.h>
116
117 video_splitter_t *video_splitter_New( vlc_object_t *p_this,
118                                       const char *psz_name,
119                                       const video_format_t *p_fmt )
120 {
121     video_splitter_t *p_splitter = vlc_custom_create( p_this,
122                                        sizeof(*p_splitter), "video splitter" );
123     if( !p_splitter )
124         return NULL;
125
126     video_format_Copy( &p_splitter->fmt, p_fmt );
127
128     /* */
129     p_splitter->p_module = module_need( p_splitter, "video splitter", psz_name, true );
130     if( ! p_splitter->p_module )
131     {
132         video_splitter_Delete( p_splitter );
133         return NULL;
134     }
135
136     return p_splitter;
137 }
138
139 void video_splitter_Delete( video_splitter_t *p_splitter )
140 {
141     if( p_splitter->p_module )
142         module_unneed( p_splitter, p_splitter->p_module );
143
144     video_format_Clean( &p_splitter->fmt );
145
146     vlc_object_release( p_splitter );
147 }
148