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 __CPROCAWBINFILEHANDLER_H__

    21 #define __CPROCAWBINFILEHANDLER_H__

    22 

    23 #include <e32base.h>

    24 #include <f32file.h>

    25 #include "AudCommon.h"

    26 #include "ProcConstants.h"

    27 #include "ProcInFileHandler.h"

    28 

    29 

    30 class CProcAWBInFileHandler: public CProcInFileHandler 

    31     {

    32 

    33 public:

    34 

    35     static CProcAWBInFileHandler* NewL(const TDesC& aFileName, 

    36                                        RFile* aFileHandle,

    37                                        CAudClip* aClip, TInt aReadBufferSize,

    38                                        TInt aTargetSampleRate = 0, 

    39                                        TChannelMode aChannelMode = EAudSingleChannel);

    40                                        

    41     static CProcAWBInFileHandler* NewLC(const TDesC& aFileName, 

    42                                         RFile* aFileHandle,

    43                                         CAudClip* aClip, TInt aReadBufferSize,

    44                                         TInt aTargetSampleRate = 0, 

    45                                         TChannelMode aChannelMode = EAudSingleChannel);

    46 

    47 

    48     // From base class

    49 

    50     void GetPropertiesL(TAudFileProperties* aProperties);

    51     

    52     /**

    53     * Seeks a certain audio frame for reading

    54     *

    55     * Possible leave codes:  

    56     *    

    57     * @param aFrameIndex    frame index

    58     * @param aTime            time from the beginning of file in milliseconds

    59     *

    60     * @return    ETrue if successful

    61     *            EFalse if beyond the file

    62     */

    63     TBool SeekAudioFrame(TInt32 aTime);

    64 

    65     

    66     /**

    67     * Seeks a cut in audio frame for reading

    68     *

    69     * Possible leave codes:  

    70     *    

    71     *

    72     * @return    ETrue if successful

    73     *                

    74     */

    75     TBool SeekCutInFrame();

    76     

    77     virtual TBool SetNormalizingGainL(const CProcFrameHandler* aFrameHandler);

    78 

    79     virtual ~CProcAWBInFileHandler();

    80 

    81 

    82     

    83 

    84 private:

    85     

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

    87                     TInt aReadBufferSize, TInt aTargetSampleRate = 0, 

    88                     TChannelMode aChannelMode = EAudSingleChannel);

    89                     

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

    91     

    92     // durations in milliseconds

    93     virtual TBool GetFrameInfo(TInt& aSongDuration,

    94                                 TInt& aFrameAmount, 

    95                                 TInt& aAverageFrameDuration, 

    96                                 TInt& aAverageFrameSize);

    97 

    98 

    99 

   100 protected:

   101     

   102     CProcAWBInFileHandler();

   103     

   104     };

   105 

   106 #endif