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vlc_vout.h
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1 /*****************************************************************************
2  * vlc_vout.h: common video definitions
3  *****************************************************************************
4  * Copyright (C) 1999 - 2008 VLC authors and VideoLAN
5  * $Id: 2d6c180bfc1dcdf2d57277a44508dcda5d8f17de $
6  *
7  * Authors: Vincent Seguin <seguin@via.ecp.fr>
8  * Samuel Hocevar <sam@via.ecp.fr>
9  * Olivier Aubert <oaubert 47 videolan d07 org>
10  *
11  * This program is free software; you can redistribute it and/or modify it
12  * under the terms of the GNU Lesser General Public License as published by
13  * the Free Software Foundation; either version 2.1 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public License
22  * along with this program; if not, write to the Free Software Foundation,
23  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24  *****************************************************************************/
25 
26 #ifndef VLC_VOUT_H_
27 #define VLC_VOUT_H_ 1
28 
29 /**
30  * \file
31  * This file defines common video output structures and functions in vlc
32  */
33 
34 #include <vlc_picture.h>
35 #include <vlc_filter.h>
36 #include <vlc_subpicture.h>
37 
38 /*****************************************************************************
39  * Prototypes
40  *****************************************************************************/
41 
42 /**
43  * \defgroup video_output Video Output
44  * This module describes the programming interface for video output threads.
45  * It includes functions allowing to open a new thread, send pictures to a
46  * thread, and destroy a previously opened video output thread.
47  * @{
48  */
49 
50 /**
51  * Vout configuration
52  */
53 typedef struct {
55  vlc_object_t *input;
56  bool change_fmt;
57  const video_format_t *fmt;
58  unsigned dpb_size;
60 
61 /**
62  * Video output thread private structure
63  */
65 
66 /**
67  * Video output thread descriptor
68  *
69  * Any independent video output device, such as an X11 window or a GGI device,
70  * is represented by a video output thread, and described using the following
71  * structure.
72  */
73 struct vout_thread_t {
75 
76  /* Private vout_thread data */
78 };
79 
80 /* Alignment flags */
81 #define VOUT_ALIGN_LEFT 0x0001
82 #define VOUT_ALIGN_RIGHT 0x0002
83 #define VOUT_ALIGN_HMASK 0x0003
84 #define VOUT_ALIGN_TOP 0x0004
85 #define VOUT_ALIGN_BOTTOM 0x0008
86 #define VOUT_ALIGN_VMASK 0x000C
87 
88 /*****************************************************************************
89  * Prototypes
90  *****************************************************************************/
91 
92 /**
93  * Returns a suitable vout or release the given one.
94  *
95  * If cfg->fmt is non NULL and valid, a vout will be returned, reusing cfg->vout
96  * is possible, otherwise it returns NULL.
97  * If cfg->vout is not used, it will be closed and released.
98  *
99  * You can release the returned value either by vout_Request or vout_Close()
100  * followed by a vlc_object_release() or shorter vout_CloseAndRelease()
101  *
102  * \param object a vlc object
103  * \param cfg the video configuration requested.
104  * \return a vout
105  */
107 #define vout_Request(a,b) vout_Request(VLC_OBJECT(a),b)
109 /**
110  * This function will close a vout created by vout_Request.
111  * The associated vout module is closed.
112  * Note: It is not released yet, you'll have to call vlc_object_release()
113  * or use the convenient vout_CloseAndRelease().
114  *
115  * \param p_vout the vout to close
116  */
117 VLC_API void vout_Close( vout_thread_t *p_vout );
118 
119 /**
120  * This function will close a vout created by vout_Create
121  * and then release it.
122  *
123  * \param p_vout the vout to close and release
124  */
125 static inline void vout_CloseAndRelease( vout_thread_t *p_vout )
126 {
127  vout_Close( p_vout );
128  vlc_object_release( p_vout );
129 }
130 
131 /**
132  * This function will handle a snapshot request.
133  *
134  * pp_image, pp_picture and p_fmt can be NULL otherwise they will be
135  * set with returned value in case of success.
136  *
137  * pp_image will hold an encoded picture in psz_format format.
138  *
139  * i_timeout specifies the time the function will wait for a snapshot to be
140  * available.
141  *
142  */
144  block_t **pp_image, picture_t **pp_picture,
145  video_format_t *p_fmt,
146  const char *psz_format, mtime_t i_timeout );
147 
148 /* */
151 
154 
155 /* */
159 
160 VLC_API void vout_EnableFilter( vout_thread_t *, const char *,bool , bool );
161 
162 /**@}*/
163 
164 #endif /* _VLC_VIDEO_H */