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 __CPROCWAVINFILEHANDLER_H__

    21 #define __CPROCWAVINFILEHANDLER_H__

    22 

    23 #include <e32base.h>

    24 #include <f32file.h>

    25 #include "AudCommon.h"

    26 #include "ProcConstants.h"

    27 #include "ProcInFileHandler.h"

    28 #include "ProcDecoder.h"

    29 

    30 

    31 class CProcWAVInFileHandler: public CProcInFileHandler 

    32     {

    33 

    34 public:

    35 

    36 

    37     /*

    38     * Constructors & destructor

    39     *

    40     */

    41 

    42     static CProcWAVInFileHandler* NewL(const TDesC& aFileName, RFile* aFileHandle,

    43                                         CAudClip* aClip, TInt aReadBufferSize,

    44                                             TInt aTargetSampleRate = 0, 

    45                                             TChannelMode aChannelMode = EAudSingleChannel);

    46     static CProcWAVInFileHandler* NewLC(const TDesC& aFileName, RFile* aFileHandle,

    47                                         CAudClip* aClip, TInt aReadBufferSize,

    48                                             TInt aTargetSampleRate = 0, 

    49                                             TChannelMode aChannelMode = EAudSingleChannel);

    50     virtual ~CProcWAVInFileHandler();

    51 

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

    53 

    54     void GetPropertiesL(TAudFileProperties* aProperties);

    55     

    56     /**

    57     * Seeks a certain audio frame for reading

    58     *

    59     * Possible leave codes:  

    60     *    

    61     * @param aFrameIndex    frame index

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

    63     *

    64     * @return    ETrue if successful

    65     *            EFalse if beyond the file

    66     */

    67     TBool SeekAudioFrame(TInt32 aTime);

    68 

    69     

    70     /**

    71     * Seeks a cut in audio frame for reading

    72     *

    73     * Possible leave codes:  

    74     *    

    75     *

    76     * @return    ETrue if successful

    77     *                

    78     */

    79     TBool SeekCutInFrame();

    80 

    81     

    82     virtual TBool SetNormalizingGainL(const CProcFrameHandler* aFrameHandler);

    83 

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

    85 

    86 private:

    87 

    88     // number of samples in a frame

    89     TInt iNumberofSamplesInFrame;    

    90 

    91 private:

    92     

    93     // constructL

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

    95                     TInt aReadBufferSize, TInt aTargetSampleRate = 0, 

    96                     TChannelMode aChannelMode = EAudSingleChannel);

    97     

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

    99     

   100     // c++ constructor

   101     CProcWAVInFileHandler();

   102 

   103 private:

   104 

   105 

   106     };

   107 

   108 #endif