/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: mp engine factory.
*
*/

#include "mpengine.h"
#include "mpenginefactory.h"
#include "mptrace.h"

/*!
    \class MpEngineFactory
    \brief Music Player engine factory.

    MP Engine factory is responsible to create and mantain ownership of MP engines.
*/

/*!
 Constructs music player engine factory.
 */
MpEngineFactory::MpEngineFactory()
    : mSharedEngine( 0 )
{
    TX_LOG
}

/*!
 Destructs music player engine factory.
 */
MpEngineFactory::~MpEngineFactory()
{
}

/*!
 Returns the singleton instance of music player engine factory.
 */
MpEngineFactory * MpEngineFactory::instance()
{
    static MpEngineFactory instance;
    return &instance;
}

/*!
 Returns an instance to an engine with \a hostUid, and \a mode, if the shared engine is 
 already created parameters are ignored.
 */
MpEngine *MpEngineFactory::createSharedEngine( TUid hostUid , MpEngine::EngineMode mode )
{
    if ( !instance()->mSharedEngine ) {
        instance()->mSharedEngine = new MpEngine();
        instance()->mSharedEngine->initialize( hostUid, mode );
    }
    return instance()->mSharedEngine;
}

/*!
 Returns an instance to an isolated engine with \a mode.
 */
MpEngine *MpEngineFactory::createIsolatedEngine( MpEngine::EngineMode mode )
{
    instance()->mEngines.append( new MpEngine() );
    instance()->mEngines.last()->initialize( TUid::Uid( MpCommon::KMusicPlayerUid + instance()->mEngines.count() ), mode );
    return instance()->mEngines.last();
}

/*!
 Returns an instance to the current shared engine previously created with createEngine().
 */
MpEngine *MpEngineFactory::sharedEngine()
{
    return instance()->mSharedEngine;
}

/*!
 Closes all engines created on this process.
 */
void MpEngineFactory::close()
{
    if ( instance()->mSharedEngine ) {
        delete instance()->mSharedEngine;
        instance()->mSharedEngine = 0;
        
    }
    MpEngine *ptr;
    foreach ( ptr, instance()->mEngines ) {
        delete ptr;
        ptr = 0;
    }
}