1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - Initial contribution

    11 *

    12 * Contributors:

    13 * Ixonos Plc

    14 *

    15 * Description:

    16 *

    17 */

    18 

    19 

    20 #ifndef __CPROCMP3FRAMEHANDLER_H__

    21 #define __CPROCMP3FRAMEHANDLER_H__

    22 

    23 /*-- System Headers. --*/

    24 #include <e32base.h>

    25 

    26 /*-- Project Headers. --*/

    27 #include "AudCommon.h"

    28 #include "ProcFrameHandler.h"

    29 #include "ProcInFileHandler.h"

    30 

    31 #include "MP3API.h"

    32 

    33 /**

    34  * Frame handler class for accessing MP3 data elements.

    35  *

    36  * @author  Juha Ojanperä

    37  */

    38 class CProcMP3FrameHandler : public CProcFrameHandler 

    39     {

    40 public:

    41 

    42     

    43     /*

    44     * Constructors & destructor

    45     */

    46     static CProcMP3FrameHandler* NewL();

    47     static CProcMP3FrameHandler* NewLC();

    48 

    49     ~CProcMP3FrameHandler();

    50 

    51 

    52     // From base class CProcFrameHandler ---------->

    53     TBool ManipulateGainL(const HBufC8* aFrameIn, HBufC8*& aFrameOut, TInt8 aGain);

    54     TBool GetGainL(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain) const;

    55     TBool GetNormalizingMargin(const HBufC8* aFrame, TInt8& aMargin) const;

    56     TBool IsMixingAvailable() const;

    57     // <--------------------------------------------

    58     

    59     

    60 

    61 private:

    62 

    63     // ConstructL

    64     void ConstructL();

    65     

    66     // c++ constructor

    67     CProcMP3FrameHandler();

    68     

    69     // internal function for reading MP3 gains

    70     TBool GetMP3Gains(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain, TBitStream& aBs) const;

    71 

    72 private:

    73 

    74     // a handle to MP3 editing class in MP3AACManipLib

    75     CMp3Edit* iMp3Edit;

    76     

    77     // a flag to indicate whether MP3 decoder is initialized

    78     mutable TBool decInitialized;

    79     

    80     // a handle to CMPAudDec

    81     CMPAudDec *iMpAud;

    82     TMpTransportHandle *iTHandle;

    83     

    84 

    85     friend class CProcMP3InFileHandler;

    86 

    87     };

    88 

    89 #endif /*-- __CPROCMP3FRAMEHANDLER_H__ --*/