2 * MltFilteredProducer.cpp - MLT Wrapper
3 * Copyright (C) 2004-2005 Charles Yates
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 Lesser General Public License as published
8 * by 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 #include "MltFilteredProducer.h"
24 FilteredProducer::FilteredProducer( Profile& profile, char *id, char *arg ) :
25 Producer( profile, id, arg )
27 // Create a reference to the last service
28 last = new Service( *this );
31 FilteredProducer::~FilteredProducer( )
33 // Delete the reference to the last service
37 int FilteredProducer::attach( Filter &filter )
40 if ( filter.is_valid( ) )
42 Service *consumer = last->consumer( );
43 filter.connect_producer( *last );
44 if ( consumer->is_valid( ) )
45 consumer->connect_producer( filter );
48 last = new Service( filter );
57 int FilteredProducer::detach( Filter &filter )
59 if ( filter.is_valid( ) )
61 Service *it = new Service( *last );
62 while ( it->is_valid( ) && it->get_service( ) != filter.get_service( ) )
64 Service *producer = it->producer( );
68 if ( it->get_service( ) == filter.get_service( ) )
70 Service *producer = it->producer( );
71 Service *consumer = it->consumer( );
72 if ( consumer->is_valid( ) )
73 consumer->connect_producer( *producer );
74 Producer dummy( "colour" );
75 dummy.connect_producer( *it );
76 if ( last->get_service( ) == it->get_service( ) )
79 last = new Service( *producer );