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

   1 /**
   2  * \file mlt_multitrack.h
   3  * \brief multitrack service class
   4  * \see mlt_multitrack_s
   5  *
   6  * Copyright (C) 2003-2009 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_MULITRACK_H_
  25 #define _MLT_MULITRACK_H_
  26
  27 #include "mlt_producer.h"
  28
  29 /** \brief Track class used by mlt_multitrack_s
  30  */
  31
  32 struct mlt_track_s
  33 {
  34         mlt_producer producer;
  35         mlt_event event;
  36 };
  37
  38 typedef struct mlt_track_s *mlt_track;
  39
  40 /** \brief Multitrack class
  41  *
  42  * A multitrack is a parallel container of producers that acts a single producer.
  43  *
  44  * \extends mlt_producer_s
  45  * \properties \em log_id not currently used, but sets it to "mulitrack"
  46  */
  47
  48 struct mlt_multitrack_s
  49 {
  50         /** We're extending producer here */
  51         struct mlt_producer_s parent;
  52         mlt_track *list;
  53         int size;
  54         int count;
  55 };
  56
  57 #define MLT_MULTITRACK_PRODUCER( multitrack )   ( &( multitrack )->parent )
  58 #define MLT_MULTITRACK_SERVICE( multitrack )    MLT_PRODUCER_SERVICE( MLT_MULTITRACK_PRODUCER( multitrack ) )
  59 #define MLT_MULTITRACK_PROPERTIES( multitrack ) MLT_SERVICE_PROPERTIES( MLT_MULTITRACK_SERVICE( multitrack ) )
  60
  61 extern mlt_multitrack mlt_multitrack_init( );
  62 extern mlt_producer mlt_multitrack_producer( mlt_multitrack self );
  63 extern mlt_service mlt_multitrack_service( mlt_multitrack self );
  64 extern mlt_properties mlt_multitrack_properties( mlt_multitrack self );
  65 extern int mlt_multitrack_connect( mlt_multitrack self, mlt_producer producer, int track );
  66 extern mlt_position mlt_multitrack_clip( mlt_multitrack self, mlt_whence whence, int index );
  67 extern void mlt_multitrack_close( mlt_multitrack self );
  68 extern int mlt_multitrack_count( mlt_multitrack self );
  69 extern void mlt_multitrack_refresh( mlt_multitrack self );
  70 extern mlt_producer mlt_multitrack_track( mlt_multitrack self, int track );
  71
  72 #endif
  73