/**
 * MltFilteredProducer.cpp - MLT Wrapper
 * Copyright (C) 2004-2005 Charles Yates
 * Author: Charles Yates <charles.yates@pandora.be>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include "MltFilteredProducer.h"
using namespace Mlt;

FilteredProducer::FilteredProducer( char *id, char *arg ) :
	Producer( id, arg )
{
	// Create a reference to the last service
	last = new Service( *this );
}

FilteredProducer::~FilteredProducer( )
{
	// Delete the reference to the last service
	delete last;
}

int FilteredProducer::attach( Filter &filter )
{
	int error = 0;
	if ( filter.is_valid( ) )
	{
		Service *consumer = last->consumer( );
		filter.connect_producer( *last );
		if ( consumer->is_valid( ) )
			consumer->connect_producer( filter );
		delete consumer;
		delete last;
		last = new Service( filter );
	}
	else
	{
		error = 1;
	}
	return error;
}

int FilteredProducer::detach( Filter &filter )
{
	if ( filter.is_valid( ) )
	{
		Service *it = new Service( *last );
		while ( it->is_valid( ) && it->get_service( ) != filter.get_service( ) )
		{
			Service *producer = it->producer( );
			delete it;
			it = producer;
		}
		if ( it->get_service( ) == filter.get_service( ) )
		{
			Service *producer = it->producer( );
			Service *consumer = it->consumer( );
			if ( consumer->is_valid( ) )
				consumer->connect_producer( *producer );
			Producer dummy( "colour" );
			dummy.connect_producer( *it );
			if ( last->get_service( ) == it->get_service( ) )
			{
				delete last;
				last = new Service( *producer );
			}
		}
		delete it;
	}
	return 0;
}