/*
* Copyright (c) 2010 Ixonos Plc.
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the "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:
* Ixonos Plc
*
* Description:  
*
*/


#ifndef __CPROCWAVINFILEHANDLER_H__
#define __CPROCWAVINFILEHANDLER_H__

#include <e32base.h>
#include <f32file.h>
#include "AudCommon.h"
#include "ProcConstants.h"
#include "ProcInFileHandler.h"
#include "ProcDecoder.h"


class CProcWAVInFileHandler: public CProcInFileHandler 
    {

public:


    /*
    * Constructors & destructor
    *
    */

    static CProcWAVInFileHandler* NewL(const TDesC& aFileName, RFile* aFileHandle,
                                        CAudClip* aClip, TInt aReadBufferSize,
                                            TInt aTargetSampleRate = 0, 
                                            TChannelMode aChannelMode = EAudSingleChannel);
    static CProcWAVInFileHandler* NewLC(const TDesC& aFileName, RFile* aFileHandle,
                                        CAudClip* aClip, TInt aReadBufferSize,
                                            TInt aTargetSampleRate = 0, 
                                            TChannelMode aChannelMode = EAudSingleChannel);
    virtual ~CProcWAVInFileHandler();

    // From base class ------------------>

    void GetPropertiesL(TAudFileProperties* aProperties);
    
    /**
    * Seeks a certain audio frame for reading
    *
    * Possible leave codes:  
    *    
    * @param aFrameIndex    frame index
    * @param aTime            time from the beginning of file in milliseconds
    *
    * @return    ETrue if successful
    *            EFalse if beyond the file
    */
    TBool SeekAudioFrame(TInt32 aTime);

    
    /**
    * Seeks a cut in audio frame for reading
    *
    * Possible leave codes:  
    *    
    *
    * @return    ETrue if successful
    *                
    */
    TBool SeekCutInFrame();

    
    virtual TBool SetNormalizingGainL(const CProcFrameHandler* aFrameHandler);

    // <-------------------------- From base class

private:

    // number of samples in a frame
    TInt iNumberofSamplesInFrame;    

private:
    
    // constructL
    void ConstructL(const TDesC& aFileName, RFile* aFileHandle, CAudClip* aClip, 
                    TInt aReadBufferSize, TInt aTargetSampleRate = 0, 
                    TChannelMode aChannelMode = EAudSingleChannel);
    
    TBool GetEncAudioFrameL(HBufC8*& aFrame, TInt& aSize, TInt32& aTime);
    
    // c++ constructor
    CProcWAVInFileHandler();

private:


    };

#endif