include/vlc_vout.h

   1 /*****************************************************************************
   2  * vlc_vout.h: common video definitions
   3  *****************************************************************************
   4  * Copyright (C) 1999 - 2008 VLC authors and VideoLAN
   5  * $Id$
   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 {
  54     vout_thread_t        *vout;
  55     vlc_object_t         *input;
  56     bool                 change_fmt;
  57     const video_format_t *fmt;
  58     unsigned             dpb_size;
  59 } vout_configuration_t;
  60
  61 /**
  62  * Video output thread private structure
  63  */
  64 typedef struct vout_thread_sys_t vout_thread_sys_t;
  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 {
  74     VLC_COMMON_MEMBERS
  75
  76     /* Private vout_thread data */
  77     vout_thread_sys_t *p;
  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  */
 106 VLC_API vout_thread_t * vout_Request( vlc_object_t *object, const vout_configuration_t *cfg );
 107 #define vout_Request(a,b) vout_Request(VLC_OBJECT(a),b)
 108
 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  */
 143 VLC_API int vout_GetSnapshot( vout_thread_t *p_vout,
 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 VLC_API void vout_ChangeAspectRatio( vout_thread_t *p_vout,
 149                                      unsigned int i_num, unsigned int i_den );
 150
 151 /* */
 152 VLC_API picture_t * vout_GetPicture( vout_thread_t * );
 153 VLC_API void vout_PutPicture( vout_thread_t *, picture_t * );
 154
 155 VLC_API void vout_HoldPicture( vout_thread_t *, picture_t * );
 156 VLC_API void vout_ReleasePicture( vout_thread_t *, picture_t * );
 157
 158 /* */
 159 VLC_API void vout_PutSubpicture( vout_thread_t *, subpicture_t * );
 160 VLC_API int vout_RegisterSubpictureChannel( vout_thread_t * );
 161 VLC_API void vout_FlushSubpictureChannel( vout_thread_t *, int );
 162
 163 VLC_API void vout_EnableFilter( vout_thread_t *, const char *,bool , bool  );
 164
 165 /**@}*/
 166
 167 #endif /* _VLC_VIDEO_H */