/*

* Copyright (c) 2006 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:  Class definition for the frame table functions.

 *

*/

#ifndef CFRAMETABLE_H

#define CFRAMETABLE_H

//  INCLUDES

#include <e32base.h>

// FORWARD DECLARATIONS

class MFrameTableEventObserver;

// CLASS DEFINITIONS

/**

 *  This class provides AAC utility functions.

 *

 *  @lib AACAudioControllerUtility.lib

 *  @since 3.0

 */

class CFrameTable : public CBase

    {

public:

    // Constructors and destructor

    enum TFrameTableEvent

        {

        EPosReached,

        EDecodeInterval,

        EPlayWindowEndPosReached

        };

    /**

     * Two-phased constructor.

     */

    IMPORT_C static CFrameTable* NewL();

    /**

     * Destructor.

     */

    IMPORT_C virtual ~CFrameTable();

public:

    // New functions

    IMPORT_C TInt InitFrameTable(TInt aSampleRate, TInt aSamplesPerFrame);

    IMPORT_C TInt SubmitTableEntry(TUint aPos);

    IMPORT_C TInt FindFramePosFromTime(TUint& aTimeMs, TUint& aPos);

    IMPORT_C TInt FindFrameTimeFromPos(TUint& aTimeMs, TUint& aPos);

    IMPORT_C TInt LastFramePos(TUint& aPos);

    IMPORT_C TInt LastFrameTime(TUint& aTimeMs);

    IMPORT_C void ShrinkTable();

    IMPORT_C void ResetTable();

    IMPORT_C TInt SetSourceReference(TUint aTimeMs, TUint aPos);

    IMPORT_C TInt RegisterForEvent(TFrameTableEvent aEvent,

            MFrameTableEventObserver* aObserver, TUint aParam);

    IMPORT_C TInt UnRegisterForEvent(TFrameTableEvent aEvent,

            MFrameTableEventObserver* aObserver);

    IMPORT_C TInt Bitrate();

    IMPORT_C TInt IsSeeking(TBool& aIsSeeking);

    IMPORT_C TInt GetLastPosEvent(TUint& aPos);

private:

    class TBufRefPosEntry

        {

public:

        TUint iPos;

        TUint iFrameNum;

        };

    /**

     * C++ default constructor.

     */

    CFrameTable();

    /**

     * By default Symbian 2nd phase constructor is private.

     */

    void ConstructL();

    TUint CalcFrameFromTimeMs(TUint aTimeMs);

    TInt SubmitLowResTableEntry(TBufRefPosEntry& aEntry);

private:

    // Data

    RArray<TBufRefPosEntry> iFrameTable;

    RArray<TBufRefPosEntry> iLowResFrameTable;

    TUint iSampleRate;

    TUint iSamplesPerFrame;

    TUint iMsecPerFrame;

    TUint iLastBytePos;

    TUint iAvgBitrate;

    TUint iOffset;

    TUint iTimeRefMs;

    TUint iBufCnt;

    TUint iPosEventMs;

    TUint iPlayWindowEndPosEventMs;

    TInt iIntervalRef;

    TUint iIntervalEvent;

    MFrameTableEventObserver* iObserver;

    TUint iEventPos;

    TUint iCurrentFrameCount;

    TUint iFramesPerLowResInterval;

    TUint iLowResIntervalMs;

    TUint iFrameNum;

    TBool iOkToShrink;

    };

class MFrameTableEventObserver

    {

public:

    virtual TInt

            HandleFrameTableEvent(CFrameTable::TFrameTableEvent aEvent) = 0;

    };

#endif 		// CFRAMETABLE_H

// End of File