2 * mlt_filter.h -- abstraction for all filter services
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #ifndef _MLT_FILTER_H_
22 #define _MLT_FILTER_H_
24 #include "mlt_service.h"
26 /** The interface definition for all filters.
31 // We're implementing service here
32 struct mlt_service_s parent
;
35 void ( *close
)( mlt_filter
);
37 // protected filter method
38 mlt_frame ( *process
)( mlt_filter
, mlt_frame
);
40 // track and in/out points
47 /** Public final methods
50 extern int mlt_filter_init( mlt_filter
this, void *child
);
51 extern mlt_service
mlt_filter_service( mlt_filter
this );
52 extern mlt_properties
mlt_filter_properties( mlt_filter
this );
53 extern int mlt_filter_connect( mlt_filter
this, mlt_service producer
, int index
);
54 extern void mlt_filter_set_in_and_out( mlt_filter
this, mlt_position in
, mlt_position out
);
55 extern int mlt_filter_get_track( mlt_filter
this );
56 extern mlt_position
mlt_filter_get_in( mlt_filter
this );
57 extern mlt_position
mlt_filter_get_out( mlt_filter
this );
58 extern void mlt_filter_close( mlt_filter
);