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

   1 /**
   2  * \file mlt_multitrack.h
   3  * \brief multitrack service class
   4  *
   5  * Copyright (C) 2003-2008 Ushodaya Enterprises Limited
   6  * \author Charles Yates <charles.yates@pandora.be>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #ifndef _MLT_MULITRACK_H_
  24 #define _MLT_MULITRACK_H_
  25
  26 #include "mlt_producer.h"
  27
  28 /** \brief Track class
  29  */
  30
  31 struct mlt_track_s
  32 {
  33         mlt_producer producer;
  34         mlt_event event;
  35 };
  36
  37 typedef struct mlt_track_s *mlt_track;
  38
  39 /** \brief Multitrack class
  40  *
  41  * A multitrack is a parallel container of producers that acts a single producer.
  42  *
  43  * \extends mlt_producer_s
  44  * \properties \em log_id not currently used, but sets it to "mulitrack"
  45  */
  46
  47 struct mlt_multitrack_s
  48 {
  49         /** We're extending producer here */
  50         struct mlt_producer_s parent;
  51         mlt_track *list;
  52         int size;
  53         int count;
  54 };
  55
  56 #define MLT_MULTITRACK_PRODUCER( multitrack )   ( &( multitrack )->parent )
  57 #define MLT_MULTITRACK_SERVICE( multitrack )    MLT_PRODUCER_SERVICE( MLT_MULTITRACK_PRODUCER( multitrack ) )
  58 #define MLT_MULTITRACK_PROPERTIES( multitrack ) MLT_SERVICE_PROPERTIES( MLT_MULTITRACK_SERVICE( multitrack ) )
  59
  60 extern mlt_multitrack mlt_multitrack_init( );
  61 extern mlt_producer mlt_multitrack_producer( mlt_multitrack self );
  62 extern mlt_service mlt_multitrack_service( mlt_multitrack self );
  63 extern mlt_properties mlt_multitrack_properties( mlt_multitrack self );
  64 extern int mlt_multitrack_connect( mlt_multitrack self, mlt_producer producer, int track );
  65 extern mlt_position mlt_multitrack_clip( mlt_multitrack self, mlt_whence whence, int index );
  66 extern void mlt_multitrack_close( mlt_multitrack self );
  67 extern int mlt_multitrack_count( mlt_multitrack self );
  68 extern void mlt_multitrack_refresh( mlt_multitrack self );
  69 extern mlt_producer mlt_multitrack_track( mlt_multitrack self, int track );
  70
  71 #endif
  72