research.m1stereo.tv/gitweb/ - melted/blob - src/framework/mlt_events.h

   1 /**
   2  * \file mlt_events.h
   3  * \brief event handling
   4  * \see mlt_events_struct
   5  *
   6  * Copyright (C) 2004-2009 Ushodaya Enterprises Limited
   7  * \author Charles Yates <charles.yates@pandora.be>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library 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 GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #ifndef _MLT_EVENTS_H_
  25 #define _MLT_EVENTS_H_
  26
  27 #include "mlt_types.h"
  28
  29 #if GCC_VERSION >= 40000
  30 typedef void ( *mlt_transmitter )( void *, ... );
  31 typedef void ( *mlt_listener )( void *, ... );
  32 #else
  33 /** callback function to send an event message
  34  *
  35  */
  36 typedef void ( *mlt_transmitter )( );
  37 /** event handler when receiving an event message
  38  * \param the properties object on which the event was registered
  39  * \param an opaque pointer to a service or really an object
  40  * \param variable args supplied by the transmitter
  41  */
  42 typedef void ( *mlt_listener )( );
  43 #endif
  44
  45 extern void mlt_events_init( mlt_properties self );
  46 extern int mlt_events_register( mlt_properties self, char *id, mlt_transmitter transmitter );
  47 extern void mlt_events_fire( mlt_properties self, const char *id, ... );
  48 extern mlt_event mlt_events_listen( mlt_properties self, void *service, const char *id, mlt_listener listener );
  49 extern void mlt_events_block( mlt_properties self, void *service );
  50 extern void mlt_events_unblock( mlt_properties self, void *service );
  51 extern void mlt_events_disconnect( mlt_properties self, void *service );
  52
  53 extern mlt_event mlt_events_setup_wait_for( mlt_properties self, const char *id );
  54 extern void mlt_events_wait_for( mlt_properties self, mlt_event event );
  55 extern void mlt_events_close_wait_for( mlt_properties self, mlt_event event );
  56
  57 extern void mlt_event_inc_ref( mlt_event self );
  58 extern void mlt_event_block( mlt_event self );
  59 extern void mlt_event_unblock( mlt_event self );
  60 extern void mlt_event_close( mlt_event self );
  61
  62 #endif
  63