modules/misc/qte_main.cpp

   1 /*****************************************************************************
   2  * qte_main.c : QT Embedded wrapper for gte_main
   3  *****************************************************************************
   4  * Copyright (C) 2003 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Jean-Paul Saman <jpsaman _at_ videolan _dot_ 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 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 extern "C"
  28 {
  29 #include <vlc/vlc.h>
  30 #include <stdlib.h>                                              /* atexit() */
  31 }
  32
  33 #include <qapplication.h>
  34 #include <qpainter.h>
  35
  36 extern "C"
  37 {
  38
  39 typedef struct qte_thread_t
  40 {
  41     VLC_COMMON_MEMBERS
  42
  43     QApplication*       p_qte_application;
  44     QWidget*            p_qte_widget;
  45     bool                b_gui_server;
  46
  47 } qte_thread_t;
  48
  49 /*****************************************************************************
  50  * Local prototypes.
  51  *****************************************************************************/
  52 static int  Open    ( vlc_object_t * );
  53 static void Close   ( vlc_object_t * );
  54
  55 static void QteMain ( qte_thread_t * );
  56
  57 /*****************************************************************************
  58  * Local variables (mutex-protected).
  59  *****************************************************************************/
  60 static int            i_refcount = 0;
  61 static qte_thread_t * p_qte_main = NULL;
  62
  63 /*****************************************************************************
  64  * Module descriptor
  65  *****************************************************************************/
  66 #define STANDALONE_TEXT N_("Run as standalone Qt/Embedded GUI Server")
  67 #define STANDALONE_LONGTEXT N_("Use this option to run as standalone " \
  68     "Qt/Embedded GUI Server. This option is equivalent to the -qws option " \
  69     "from normal Qt.")
  70
  71 vlc_module_begin();
  72     set_description( _("Qt Embedded GUI helper") );
  73     set_capability( "gui-helper", 90 );
  74     add_bool( "qte-guiserver", 0, NULL, STANDALONE_TEXT, STANDALONE_LONGTEXT, VLC_FALSE );
  75     add_shortcut( "qte" );
  76     set_callbacks( Open, Close );
  77 vlc_module_end();
  78
  79 } /* extern "C" */
  80
  81 /*****************************************************************************
  82  * Open: initialize and create window
  83  *****************************************************************************/
  84 static int Open( vlc_object_t *p_this )
  85 {
  86     vlc_value_t lockval;
  87
  88     /* FIXME: put this in the module (de)initialization ASAP */
  89     var_Create( p_this->p_libvlc_global, "qte", VLC_VAR_MUTEX );
  90
  91     var_Get( p_this->p_libvlc_global, "qte", &lockval );
  92     vlc_mutex_lock( (vlc_mutex_t *) lockval.p_address );
  93
  94     if( i_refcount > 0 )
  95     {
  96         i_refcount++;
  97         vlc_mutex_unlock( (vlc_mutex_t *) lockval.p_address );
  98
  99         return VLC_SUCCESS;
 100     }
 101
 102     p_qte_main = (qte_thread_t *) vlc_object_create( p_this, sizeof(qte_thread_t) );
 103
 104     /* Launch the QApplication::exec() thread. It will not return until the
 105      * application is properly initialized, which ensures us thread safety. */
 106     if( vlc_thread_create( p_qte_main, "qte_main", QteMain,
 107                            VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 108     {
 109         vlc_object_destroy( p_qte_main );
 110         i_refcount--;
 111         vlc_mutex_unlock( (vlc_mutex_t *) lockval.p_address );
 112         var_Destroy( p_this->p_libvlc_global, "qte" );
 113         return VLC_ETHREAD;
 114     }
 115
 116     i_refcount++;
 117     vlc_mutex_unlock( (vlc_mutex_t *) lockval.p_address );
 118
 119     vlc_object_attach( p_qte_main, p_this );
 120     msg_Dbg( p_this, "qte_main running" );
 121
 122     return VLC_SUCCESS;
 123 }
 124
 125 /*****************************************************************************
 126  * Close: destroy interface window
 127  *****************************************************************************/
 128 static void Close( vlc_object_t *p_this )
 129 {
 130     vlc_value_t lockval;
 131
 132     var_Get( p_this->p_libvlc_global, "qte", &lockval );
 133     vlc_mutex_lock( (vlc_mutex_t *) lockval.p_address );
 134
 135     i_refcount--;
 136
 137     if( i_refcount > 0 )
 138     {
 139         vlc_mutex_unlock( (vlc_mutex_t *) lockval.p_address );
 140         var_Destroy( p_this->p_libvlc_global, "qte" );
 141         return;
 142     }
 143     p_qte_main->p_qte_application->quit();
 144
 145     /* Cleanup allocated classes. */
 146     delete p_qte_main->p_qte_widget;
 147     delete p_qte_main->p_qte_application;
 148
 149     msg_Dbg( p_this, "Detaching qte_main" );
 150     vlc_object_detach( p_qte_main );
 151
 152     vlc_object_destroy( p_qte_main );
 153     p_qte_main = NULL;
 154
 155     vlc_mutex_unlock( (vlc_mutex_t *) lockval.p_address );
 156     var_Destroy( p_this->p_libvlc_global, "qte" );
 157 }
 158
 159 /*****************************************************************************
 160  * QteMain: Qt Embedded thread
 161  *****************************************************************************
 162  * this part of the interface is in a separate thread so that we can call
 163  * qte_main() from within it without annoying the rest of the program.
 164  *****************************************************************************/
 165 static void QteMain( qte_thread_t *p_this )
 166 {
 167     int i_argc = 1;
 168
 169     p_this->b_gui_server = VLC_FALSE;
 170     if( config_GetInt( p_this, "qte-guiserver" ) )
 171     {
 172         msg_Dbg( p_this, "Running as Qt Embedded standalone GuiServer" );
 173         p_this->b_gui_server = VLC_TRUE;
 174     }
 175
 176     /* Run as standalone GuiServer or as GuiClient. */
 177     QApplication* pApp = new QApplication(i_argc, NULL,
 178         (p_this->b_gui_server ? (QApplication::GuiServer):(QApplication::GuiClient)) );
 179     if( pApp )
 180     {
 181         p_this->p_qte_application = pApp;
 182     }
 183
 184     QWidget* pWidget = new QWidget(0, _("video") );
 185     if( pWidget )
 186     {
 187         p_this->p_qte_widget = pWidget;
 188     }
 189
 190     /* signal the creation of the window */
 191     p_this->p_qte_application->setMainWidget(p_this->p_qte_widget);
 192     p_this->p_qte_widget->show();
 193
 194     vlc_thread_ready( p_this );
 195     p_this->p_qte_application->exec();
 196 }