/*

* 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 __CPROCMP3INFILEHANDLER_H__

#define __CPROCMP3INFILEHANDLER_H__

/*-- System Headers. --*/

#include <e32base.h>

#include <f32file.h>

/*-- Project Headers. --*/

#include "AudCommon.h"

#include "ProcFrameHandler.h"

#include "ProcInFileHandler.h"

#include "Logfile.h"

#include "defines.h"

#include "Mp3API.h"

#include "ProcDecoder.h"

//#include "mpif.h"

/**

 * File handler class for accessing MP3 content.

 *

 * @author  Juha Ojanperä

 */

class CProcMP3InFileHandler: public CProcInFileHandler 

    {

public:

    /*

    * Constructors & destructor

    */

    static CProcMP3InFileHandler* NewL(const TDesC& aFileName, RFile* aFileHandle,

                                       CAudClip* aClip, TInt aReadBufferSize,

                                           TInt aTargetSampleRate = 0, 

                                           TChannelMode aChannelMode = EAudSingleChannel);

    static CProcMP3InFileHandler* NewLC(const TDesC& aFileName, RFile* aFileHandle,

                                        CAudClip* aClip, TInt aReadBufferSize,

                                            TInt aTargetSampleRate = 0, 

                                            TChannelMode aChannelMode = EAudSingleChannel);

    virtual ~CProcMP3InFileHandler();

    // From CProcInFileHandler ----------------->

    void GetPropertiesL(TAudFileProperties* aProperties);

    TBool SeekAudioFrame(TInt32 aTime);

    TBool SeekCutInFrame();

    virtual TBool GetDurationL(TInt32& aTime, TInt& aFrameAmount);

    virtual TBool SetNormalizingGainL(const CProcFrameHandler* aFrameHandler);

    //<-----------------------------------------

private:

    // constructL

    void ConstructL(const TDesC& aFileName, RFile* aFileHandle, CAudClip* aClip, 

                    TInt aReadBufferSize, TInt aTargetSampleRate = 0, 

                    TChannelMode aChannelMode = EAudSingleChannel);

    // C++ constructor

    CProcMP3InFileHandler();

    TBool GetEncAudioFrameL(HBufC8*& aFrame, TInt& aSize, TInt32& aTime);

    // gets one Mp3 frame

    int16 GetMP3Frame(uint8 *dataBytes, int16 bufSize, TMpFrameState *frState, uint8 syncStatus);

    // gets bitrate

    int16 GetMP3Bitrate(void);

    // check that file is valid mp3

    TBool Validate(TDes8& aDes);

    // seek for frame sync codes

    TInt SeekSync(TDes8& aDes, TInt aBufPos);

    // get info for a single frame

    TInt FrameInfo(const TUint8* aBuf,TInt aBufLen,TInt& aBitRate);

    // get ID3 header length

    TInt ID3HeaderLength(TDes8& aDes, TInt aPosition);

private:

    /*-- MP3 file format handle. --*/

    TMpTransportHandle *mp3FileFormat;

    /*-- Legal MP3 file? --*/

    uint8 isValidMP3;

    /*-- Input buffer; start of frame is seached from here. --*/

    uint8 *mp3HeaderBytes;

    CLogFile *mp3Log;

    /*-- Free format flag. --*/

    uint8 isFreeFormatMP3;

    // a handle to mp3 editing class in MP3AACManipLib    

    CMp3Edit* iMp3Edit;

    /*-- VBR bitrate flag; ETrue indicates VBR file, EFalse constant. --*/

    uint8 isVbrMP3;

    };

#endif /*-- __CPROCMP3INFILEHANDLER_H__ --*/