1 /*

     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "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 *

    14 * Description:  File Audio Output

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef CFAOASYNCHHANDLER_H

    21 #define CFAOASYNCHHANDLER_H

    22 

    23 // INCLUDES

    24 #include <e32base.h>

    25 

    26 // CONSTANTS

    27 const TInt KIOError        	= 1;

    28 

    29 // CLASS DECLARATION

    30 

    31 /**

    32 *  Interface class to be implemented by observer of the File Audio Output events generator.

    33 *  @since 3.0

    34 */

    35 class MFAOEventGeneratorObserver

    36     {

    37     public:

    38 

    39         /**

    40         * Indicates the type of error if any.

    41         * @since 3.0

    42         * @param aResult A system-wide error code.

    43         * @return none

    44         */

    45         virtual void IOError(TInt aResult) = 0;

    46     };

    47 

    48 /**

    49 *  CFAOEventGenerator

    50 *

    51 *  @lib FileAudioOutput.lib

    52 *  @since 3.0

    53 */

    54 class CFAOEventGenerator : public CActive

    55     {

    56     public:

    57         /**

    58         * Two-phased constructor.

    59         */

    60         static CFAOEventGenerator* NewL(MFAOEventGeneratorObserver& aObserver);

    61 

    62         /**

    63         * Request to generate event

    64         * @aEvent The event to generate

    65         * @aError The error to report with the event

    66         * @since 3.0

    67         */

    68         void GenerateEvent(TInt aEvent, TInt aError);

    69 

    70         virtual ~CFAOEventGenerator();

    71 

    72     private:

    73 

    74         /**

    75         * C++ default constructor.

    76         */

    77         CFAOEventGenerator(MFAOEventGeneratorObserver& aObserver);

    78 

    79         /**

    80         * By default Symbian 2nd phase constructor is private.

    81         */

    82         void ConstructL();

    83 

    84         void RunL();

    85 

    86         void DoCancel();

    87 

    88         /**

    89         * Used to complete a request

    90         */

    91         void Ready(const TInt aStatus);

    92 

    93     private:

    94 

    95     	// The requested event

    96     	TInt iEvent;

    97 

    98     	// Error indicator

    99     	TInt iError;

   100 

   101         // Pointer to observer object

   102         MFAOEventGeneratorObserver* iObserver;

   103     };

   104 

   105 #endif 		// CFAOASYNCHHANDLER_H