2 * mlt_transition.h -- abstraction for all transition services
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #ifndef _MLT_TRANSITION_H_
22 #define _MLT_TRANSITION_H_
24 #include "mlt_service.h"
26 /** The interface definition for all transitions.
29 struct mlt_transition_s
31 /* We're implementing service here */
32 struct mlt_service_s parent
;
35 void ( *close
)( mlt_transition
);
37 /* protected transition method */
38 mlt_frame ( *process
)( mlt_transition
, mlt_frame
, mlt_frame
);
43 /* track and in/out points */
51 /** Public final methods
54 #define MLT_TRANSITION_SERVICE( transition ) ( &( transition )->parent )
55 #define MLT_TRANSITION_PROPERTIES( transition ) MLT_SERVICE_PROPERTIES( MLT_TRANSITION_SERVICE( transition ) )
57 extern int mlt_transition_init( mlt_transition self
, void *child
);
58 extern mlt_transition
mlt_transition_new( );
59 extern mlt_service
mlt_transition_service( mlt_transition self
);
60 extern mlt_properties
mlt_transition_properties( mlt_transition self
);
61 extern int mlt_transition_connect( mlt_transition self
, mlt_service producer
, int a_track
, int b_track
);
62 extern void mlt_transition_set_in_and_out( mlt_transition self
, mlt_position in
, mlt_position out
);
63 extern int mlt_transition_get_a_track( mlt_transition self
);
64 extern int mlt_transition_get_b_track( mlt_transition self
);
65 extern mlt_position
mlt_transition_get_in( mlt_transition self
);
66 extern mlt_position
mlt_transition_get_out( mlt_transition self
);
67 extern mlt_frame
mlt_transition_process( mlt_transition self
, mlt_frame a_frame
, mlt_frame b_frame
);
68 extern void mlt_transition_close( mlt_transition self
);