Constness changes
[melted] / 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