/*

* Copyright (c) 2002-2007 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:  This class implements RateControl for HTTP stream audio player.

*

*/

//  INCLUDE FILES

#include <jdebug.h>

#include <e32base.h>

#include "cmmaaudiostreamratecontrol.h"

namespace

{

const TInt KErrorMessageSize = 32;

_LIT(KErrDefaultError, "Symbian OS Error: %d");

}

CMMAAudioStreamRateControl* CMMAAudioStreamRateControl::NewL(CMMAAudioStreamPlayer* aPlayer)

{

    CMMAAudioStreamRateControl* self = new(ELeave) CMMAAudioStreamRateControl(aPlayer);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

CMMAAudioStreamRateControl::~CMMAAudioStreamRateControl()

{

    DEBUG("MMA:CMMAAudioStreamRateControl::~CMMAAudioStreamRateControl");

    if (iPlayer)

    {

        iPlayer->RemoveStateListener(this);

    }

}

CMMAAudioStreamRateControl::CMMAAudioStreamRateControl(CMMAAudioStreamPlayer* aPlayer) :

        iPlayer(aPlayer), iCurrentRate(KMMADefaultRate)

{

    DEBUG("MMA:CMMAAudioStreamRateControl::CMMAAudioStreamRateControl");

}

void CMMAAudioStreamRateControl::ConstructL()

{

    iPlayer->AddStateListenerL(this);

}

void CMMAAudioStreamRateControl::StateChanged(TInt aState)

{

    DEBUG("MMA:CMMAAudioStreamRateControl::StateChanged");

    if (aState == CMMAPlayer::EStarted && iCurrentRate == KMMAMinRate)

    {

        // do not post event to Java or change player state

        TInt err = iPlayer->Pause();

        if (err != KErrNone)

        {

            DEBUG_INT("CMMAAudioStreamRateControl::StateChanged: Pause error %d", err);

            TBuf<KErrorMessageSize> errorMessage;

            errorMessage.Format(KErrDefaultError, err);

            iPlayer->PostStringEvent(CMMAPlayerEvent::EError, errorMessage);

        }

    }

}

TInt CMMAAudioStreamRateControl::SetRateL(TInt aRate)

{

    DEBUG("MMA:CMMAAudioStreamRateControl::SetRateL");

    TInt newRate;

    if (aRate <= KMMAMinRate)

    {

        newRate = KMMAMinRate;

    }

    else

    {

        newRate = KMMADefaultRate;

    }

    if ((iPlayer->State() == CMMAPlayer::EStarted) &&

            (newRate != iCurrentRate))

    {

        if (newRate == KMMAMinRate)

        {

            // do not post event to Java or change player state

            User::LeaveIfError(iPlayer->Pause());

        }

        else

        {

            // do not post event to Java or change player state

        }

    }

    iCurrentRate = newRate;

    return iCurrentRate;

}

TInt CMMAAudioStreamRateControl::RateL()

{

    return iCurrentRate;

}

//  END OF FILE