1 /*

     2 * Copyright (c) 2007-2009 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:

    15 * Save as expressly licensed to you by Symbian Software Ltd, all rights reserved.

    16 * 

    17 *

    18 */

    19 

    20 

    21 

    22 /**

    23  @file

    24  @publishedPartner

    25  @released

    26 */

    27 

    28 #ifndef MAUDIOCODECOBSERVER_H

    29 #define MAUDIOCODECOBSERVER_H

    30 

    31 #include <e32base.h>

    32 #include <a3f/a3fbase.h>

    33 

    34 /**

    35  *  An interface to a set of AudioGainControl callback functions.

    36  *

    37  *  This serves as the method of communication between the client and the

    38  *  AudioGainControl.

    39  *

    40  *  The class is a mixin and is intended to be inherited by the client class

    41  *  that is interested in observing the Gain operations. The functions

    42  *  encapsulated by this class are called when specific events occur while

    43  *  processing audio.

    44  *

    45  */

    46 class MAudioCodecObserver

    47 	{

    48 public:

    49 

    50 	/**

    51 	* Callback showing completion SetSampleRate().

    52 	*

    53 	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error

    54 	* specific errors to be defined.

    55 	*/

    56 	virtual void SampleRateSet(TInt aError)=0;

    57 

    58 	/**

    59 	* Callback showing completion SetMode().

    60 	*

    61 	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error

    62 	* specific errors to be defined.

    63 	*/

    64 	virtual void ModeSet(TInt aError)=0;

    65 

    66 	/**

    67 	* Callback showing completion GetSupportedSampleRates().

    68 	*

    69 	* @param Error will be KErrNone if the action succeeded, otherwise it will be a system error 

    70 	* specific errors to be defined. If aError is not KErrNone, then the state of aSupportedRates is undefined.

    71 	*/

    72 	virtual void GetSupportedSampleRatesComplete (TInt aError)=0;

    73 

    74 	/**

    75 	* Callback showing completion GetSupportedModes().

    76 	*

    77 	* @param aError will be KErrNone if the action succeeded, otherwise it will be a system error

    78 	* specific errors to be defined. If aError is not KErrNone, then the state of aSupportedModes is undefined.

    79 	*/

    80 	virtual void GetSupportedModesComplete (TInt aError)=0;

    81 

    82 	};

    83 

    84 #endif // MAUDIOCODECOBSERVER_H

    85