2 * mlt_service.h -- interface for all service classes
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_SERVICE_H_
22 #define _MLT_SERVICE_H_
24 #include "mlt_properties.h"
26 /** State of a service.
28 Note that a service may be dormant even though it's fully connected,
29 providing or consuming.
34 mlt_state_unknown
= 0,
35 mlt_state_dormant
= 1,
36 mlt_state_connected
= 2,
37 mlt_state_providing
= 4,
38 mlt_state_consuming
= 8
42 /** The interface definition for all services.
47 // We're extending properties here
48 struct mlt_properties_s parent
;
51 int ( *accepts_input
)( mlt_service
this );
52 int ( *accepts_output
)( mlt_service
this );
53 int ( *has_input
)( mlt_service
this );
54 int ( *has_output
)( mlt_service
this );
55 int ( *get_frame
)( mlt_service
this, mlt_frame_ptr frame
, int index
);
65 extern int mlt_service_init( mlt_service
this, void *child
);
66 extern mlt_properties
mlt_service_properties( mlt_service
this );
67 extern int mlt_service_connect_producer( mlt_service
this, mlt_service producer
, int index
);
68 extern mlt_service_state
mlt_service_get_state( mlt_service
this );
69 extern void mlt_service_close( mlt_service
this );
71 extern int mlt_service_accepts_input( mlt_service
this );
72 extern int mlt_service_accepts_output( mlt_service
this );
73 extern int mlt_service_has_input( mlt_service
this );
74 extern int mlt_service_has_output( mlt_service
this );
75 extern int mlt_service_get_frame( mlt_service
this, mlt_frame_ptr frame
, int index
);
76 extern int mlt_service_is_active( mlt_service
this );