videoeditorengine/audioeditorengine/codecs/AWB/inc/ProcAWBInFileHandler.h
author Mikael Laine <mikael.laine@ixonos.com>
Fri, 29 Jan 2010 14:08:33 +0200
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/*
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* Copyright (c) 2010 Ixonos Plc.
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - Initial contribution
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*
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* Contributors:
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* Ixonos Plc
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*
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* Description:  
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*
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*/
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#ifndef __CPROCAWBINFILEHANDLER_H__
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#define __CPROCAWBINFILEHANDLER_H__
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#include <e32base.h>
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#include <f32file.h>
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#include "AudCommon.h"
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#include "ProcConstants.h"
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#include "ProcInFileHandler.h"
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class CProcAWBInFileHandler: public CProcInFileHandler 
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    {
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public:
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    static CProcAWBInFileHandler* NewL(const TDesC& aFileName, 
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                                       RFile* aFileHandle,
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                                       CAudClip* aClip, TInt aReadBufferSize,
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                                       TInt aTargetSampleRate = 0, 
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                                       TChannelMode aChannelMode = EAudSingleChannel);
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    static CProcAWBInFileHandler* NewLC(const TDesC& aFileName, 
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                                        RFile* aFileHandle,
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                                        CAudClip* aClip, TInt aReadBufferSize,
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                                        TInt aTargetSampleRate = 0, 
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                                        TChannelMode aChannelMode = EAudSingleChannel);
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    // From base class
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    void GetPropertiesL(TAudFileProperties* aProperties);
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    /**
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    * Seeks a certain audio frame for reading
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    *
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    * Possible leave codes:  
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    *    
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    * @param aFrameIndex    frame index
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    * @param aTime            time from the beginning of file in milliseconds
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    *
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    * @return    ETrue if successful
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    *            EFalse if beyond the file
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    */
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    TBool SeekAudioFrame(TInt32 aTime);
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    /**
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    * Seeks a cut in audio frame for reading
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    *
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    * Possible leave codes:  
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    *    
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    *
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    * @return    ETrue if successful
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    *                
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    */
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    TBool SeekCutInFrame();
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    virtual TBool SetNormalizingGainL(const CProcFrameHandler* aFrameHandler);
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    virtual ~CProcAWBInFileHandler();
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private:
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    void ConstructL(const TDesC& aFileName, RFile* aFileHandle, CAudClip* aClip, 
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                    TInt aReadBufferSize, TInt aTargetSampleRate = 0, 
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                    TChannelMode aChannelMode = EAudSingleChannel);
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    TBool GetEncAudioFrameL(HBufC8*& aFrame, TInt& aSize, TInt32& aTime);
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    // durations in milliseconds
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    virtual TBool GetFrameInfo(TInt& aSongDuration,
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                                TInt& aFrameAmount, 
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                                TInt& aAverageFrameDuration, 
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                                TInt& aAverageFrameSize);
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protected:
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    CProcAWBInFileHandler();
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    };
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#endif