video_filter: fix warnings
[vlc.git] / modules / video_filter / filter_common.h
1 /*****************************************************************************
2  * filter_common.h: Common filter functions
3  *****************************************************************************
4  * Copyright (C) 2001, 2002, 2003 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Samuel Hocevar <sam@zoy.org>
8  *
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.
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 General Public License for more details.
18  *
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  *****************************************************************************/
23
24 #define ALLOCATE_DIRECTBUFFERS( i_max ) \
25     /* Try to initialize i_max direct buffers */                              \
26     while( I_OUTPUTPICTURES < ( i_max ) )                                     \
27     {                                                                         \
28         p_pic = NULL;                                                         \
29                                                                               \
30         /* Find an empty picture slot */                                      \
31         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )          \
32         {                                                                     \
33             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )       \
34             {                                                                 \
35                 p_pic = p_vout->p_picture + i_index;                          \
36                 break;                                                        \
37             }                                                                 \
38         }                                                                     \
39                                                                               \
40         if( p_pic == NULL )                                                   \
41         {                                                                     \
42             break;                                                            \
43         }                                                                     \
44                                                                               \
45         /* Allocate the picture */                                            \
46         vout_AllocatePicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma, \
47                               p_vout->output.i_width,                         \
48                               p_vout->output.i_height,                        \
49                               p_vout->output.i_aspect );                      \
50                                                                               \
51         if( !p_pic->i_planes )                                                \
52         {                                                                     \
53             break;                                                            \
54         }                                                                     \
55                                                                               \
56         p_pic->i_status = DESTROYED_PICTURE;                                  \
57         p_pic->i_type   = DIRECT_PICTURE;                                     \
58                                                                               \
59         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;                         \
60                                                                               \
61         I_OUTPUTPICTURES++;                                                   \
62     }                                                                         \
63
64 /*****************************************************************************
65  * SetParentVal: forward variable value to parent whithout triggering the
66  *               callback
67  *****************************************************************************/
68 static int SetParentVal( vlc_object_t *p_this, char const *psz_var,
69                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
70 {
71     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
72     var_Change( (vlc_object_t *)p_data, psz_var, VLC_VAR_SETVALUE,
73                  &newval, NULL );
74     return VLC_SUCCESS;
75 }
76
77 #define ADD_CALLBACKS( newvout, handler ) \
78     var_AddCallback( newvout, "fullscreen", SetParentVal, p_vout );           \
79     var_AddCallback( newvout, "mouse-x", SendEvents, p_vout );                \
80     var_AddCallback( newvout, "mouse-y", SendEvents, p_vout );                \
81     var_AddCallback( newvout, "mouse-moved", SendEvents, p_vout );            \
82     var_AddCallback( newvout, "mouse-clicked", SendEvents, p_vout );
83
84 #define DEL_CALLBACKS( newvout, handler ) \
85     var_DelCallback( newvout, "fullscreen", SetParentVal, p_vout );           \
86     var_DelCallback( newvout, "mouse-x", SendEvents, p_vout );                \
87     var_DelCallback( newvout, "mouse-y", SendEvents, p_vout );                \
88     var_DelCallback( newvout, "mouse-moved", SendEvents, p_vout );            \
89     var_DelCallback( newvout, "mouse-clicked", SendEvents, p_vout );
90
91 #define ADD_PARENT_CALLBACKS( handler ) \
92     var_AddCallback( p_vout, "fullscreen", handler, NULL );                   \
93     var_AddCallback( p_vout, "aspect-ratio", handler, NULL );                 \
94     var_AddCallback( p_vout, "crop", handler, NULL );
95
96 #define DEL_PARENT_CALLBACKS( handler ) \
97     var_DelCallback( p_vout, "fullscreen", handler, NULL );                   \
98     var_DelCallback( p_vout, "aspect-ratio", handler, NULL );                 \
99     var_DelCallback( p_vout, "crop", handler, NULL );
100
101 static int  SendEventsToChild( vlc_object_t *, char const *,
102                                vlc_value_t, vlc_value_t, void * );