1 /*****************************************************************************
2 * vlc_video.h: common video definitions
3 *****************************************************************************
4 * Copyright (C) 1999 - 2008 the VideoLAN team
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Samuel Hocevar <sam@via.ecp.fr>
9 * Olivier Aubert <oaubert 47 videolan d07 org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
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 General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
31 * This file defines common video output structures and functions in vlc
34 #include <vlc_picture.h>
35 #include <vlc_filter.h>
36 #include <vlc_subpicture.h>
38 /*****************************************************************************
40 *****************************************************************************/
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.
51 * Video ouput thread private structure
53 typedef struct vout_thread_sys_t vout_thread_sys_t;
56 * Video output thread descriptor
58 * Any independent video output device, such as an X11 window or a GGI device,
59 * is represented by a video output thread, and described using the following
66 video_format_t fmt_render; /* render format (from the decoder) */
67 video_format_t fmt_in; /* input (modified render) format */
68 video_format_t fmt_out; /* output format (for the video output) */
70 /* Private vout_thread data */
75 #define VOUT_ALIGN_LEFT 0x0001
76 #define VOUT_ALIGN_RIGHT 0x0002
77 #define VOUT_ALIGN_HMASK 0x0003
78 #define VOUT_ALIGN_TOP 0x0004
79 #define VOUT_ALIGN_BOTTOM 0x0008
80 #define VOUT_ALIGN_VMASK 0x000C
82 /* scaling factor (applied to i_zoom in vout_thread_t) */
83 #define ZOOM_FP_FACTOR 1000
85 /*****************************************************************************
87 *****************************************************************************/
91 * - returns a suitable vout (if requested by a non NULL p_fmt)
92 * - recycles an old vout (if given) by either destroying it or by saving it
95 * The purpose of this function is to avoid unnecessary creation/destruction of
96 * vout (and to allow optional vout reusing).
98 * You can call vout_Request on a vout created by vout_Create or by a previous
99 * call to vout_Request.
100 * You can release the returned value either by vout_Request or vout_Close()
101 * followed by a vlc_object_release() or shorter vout_CloseAndRelease()
103 * \param p_this a vlc object
104 * \param p_vout a vout candidate
105 * \param p_fmt the video format requested or NULL
106 * \return a vout if p_fmt is non NULL and the request is successfull, NULL
109 VLC_EXPORT( vout_thread_t *, vout_Request, ( vlc_object_t *p_this, vout_thread_t *p_vout, video_format_t *p_fmt ) );
110 #define vout_Request(a,b,c) vout_Request(VLC_OBJECT(a),b,c)
113 * This function will create a suitable vout for a given p_fmt. It will never
114 * reuse an already existing unused vout.
116 * You have to call either vout_Close or vout_Request on the returned value
117 * \param p_this a vlc object to which the returned vout will be attached
118 * \param p_fmt the video format requested
119 * \return a vout if the request is successfull, NULL otherwise
121 VLC_EXPORT( vout_thread_t *, vout_Create, ( vlc_object_t *p_this, video_format_t *p_fmt ) );
122 #define vout_Create(a,b) vout_Create(VLC_OBJECT(a),b)
125 * This function will close a vout created by vout_Create or vout_Request.
126 * The associated vout module is closed.
127 * Note: It is not released yet, you'll have to call vlc_object_release()
128 * or use the convenient vout_CloseAndRelease().
130 * \param p_vout the vout to close
132 VLC_EXPORT( void, vout_Close, ( vout_thread_t *p_vout ) );
135 * This function will close a vout created by vout_Create
136 * and then release it.
138 * \param p_vout the vout to close and release
140 static inline void vout_CloseAndRelease( vout_thread_t *p_vout )
142 vout_Close( p_vout );
143 vlc_object_release( p_vout );
147 * This function will handle a snapshot request.
149 * pp_image, pp_picture and p_fmt can be NULL otherwise they will be
150 * set with returned value in case of success.
152 * pp_image will hold an encoded picture in psz_format format.
154 * i_timeout specifies the time the function will wait for a snapshot to be
158 VLC_EXPORT( int, vout_GetSnapshot, ( vout_thread_t *p_vout,
159 block_t **pp_image, picture_t **pp_picture,
160 video_format_t *p_fmt,
161 const char *psz_format, mtime_t i_timeout ) );
164 VLC_EXPORT( picture_t *, vout_CreatePicture, ( vout_thread_t *, bool, bool, unsigned int ) );
165 VLC_EXPORT( void, vout_DestroyPicture, ( vout_thread_t *, picture_t * ) );
166 VLC_EXPORT( void, vout_DisplayPicture, ( vout_thread_t *, picture_t * ) );
167 VLC_EXPORT( void, vout_LinkPicture, ( vout_thread_t *, picture_t * ) );
168 VLC_EXPORT( void, vout_UnlinkPicture, ( vout_thread_t *, picture_t * ) );
171 * Return the spu_t object associated to a vout_thread_t.
173 * The return object is valid only as long as the vout is. You must not
174 * release the spu_t object returned.
175 * It cannot return NULL so no need to check.
177 VLC_EXPORT( spu_t *, vout_GetSpu, ( vout_thread_t * ) );
179 VLC_EXPORT( void, vout_EnableFilter, ( vout_thread_t *, const char *,bool , bool ) );
183 #endif /* _VLC_VIDEO_H */