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87 lines
2.2 KiB
87 lines
2.2 KiB
/**
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* MltFilteredProducer.cpp - MLT Wrapper
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* Copyright (C) 2004-2005 Charles Yates
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "MltFilteredProducer.h"
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using namespace Mlt;
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FilteredProducer::FilteredProducer( char *id, char *arg ) :
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Producer( id, arg )
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{
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// Create a reference to the last service
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last = new Service( *this );
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}
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FilteredProducer::~FilteredProducer( )
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{
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// Delete the reference to the last service
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delete last;
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}
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int FilteredProducer::attach( Filter &filter )
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{
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int error = 0;
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if ( filter.is_valid( ) )
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{
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Service *consumer = last->consumer( );
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filter.connect_producer( *last );
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if ( consumer->is_valid( ) )
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consumer->connect_producer( filter );
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delete consumer;
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delete last;
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last = new Service( filter );
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}
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else
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{
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error = 1;
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}
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return error;
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}
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int FilteredProducer::detach( Filter &filter )
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{
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if ( filter.is_valid( ) )
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{
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Service *it = new Service( *last );
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while ( it->is_valid( ) && it->get_service( ) != filter.get_service( ) )
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{
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Service *producer = it->producer( );
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delete it;
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it = producer;
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}
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if ( it->get_service( ) == filter.get_service( ) )
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{
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Service *producer = it->producer( );
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Service *consumer = it->consumer( );
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if ( consumer->is_valid( ) )
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consumer->connect_producer( *producer );
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Producer dummy( "colour" );
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dummy.connect_producer( *it );
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if ( last->get_service( ) == it->get_service( ) )
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{
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delete last;
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last = new Service( *producer );
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}
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}
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delete it;
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}
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return 0;
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}
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