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// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#ifndef AUDIOSTREAMADAPTATION_H
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#define AUDIOSTREAMADAPTATION_H
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#include <e32base.h>
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#include <ecom/ecom.h>
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#include <badesca.h>
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#include <a3f/a3fbase.h>
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/**
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@publishedAll
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@released
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Implementation of the Audio Component Version
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*/
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class TAudioComponentInfo
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{
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TInt iVersion;
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};
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/**
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@publishedAll
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@released
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Implementation of the Stream Adaptation
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*/
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class MAudioStreamAdaptationObserver;
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class CFourCCConvertor;
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class MLogicalChain;
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class MAudioContext;
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const TUid KAudioComponentManagerUid = {0x10283462};
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// Messages flags
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const TInt KServerStopping = 0x01;
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const TInt KPreemptionRequest = 0x02;
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/**
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@publishedAll
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@released
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This is the interface to AudioStreamAdaptation.
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This is represent the stream loaded when the MMRC server
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selects the adaptation.
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This functionality includes audio playback and recording using different formats
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CAudioStreamAdaptation provides the access point for clients to Adaptation Layer.
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It is responsible for initializing connections to various subsystems
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in audio adaptation. These include setting up and managing connection
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to the low level audio adaptation API implementations. The connections are then made
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available .
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*/
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class CAudioStreamAdaptation : public CBase
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{
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public:
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/**
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Constructs, and returns a pointer to, a new CAudioComponentManager object.
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@return A pointer to the CAudioComponentManager instance.
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*/
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static CAudioStreamAdaptation* NewL(TUid aType);
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/**
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Destructor.
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Deletes all objects and releases all resource owned by this instance.
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*/
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virtual ~CAudioStreamAdaptation();
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/**
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Returns if a message was passed through the adaptation.
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@param MLogicalChain
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Logical Current Chain
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@param MLogicalChain
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Desired Chain after message
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@return An error code indicating if the function call was successful. KErrNone on success, otherwise
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another of the system-wide error codes.
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*/
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virtual TInt Message(MLogicalChain& aCurrentChain, MLogicalChain& aDesiredChain, MAudioContext& aContext, TInt aFlags) = 0;
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/**
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Returns if a Audio Stream Observer was Registered.
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@param MAudioStreamAdaptationObserver
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Observer object witch will be registered
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@return An error code indicating if the function call was successful. KErrNone on success, otherwise
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another of the system-wide error codes.
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*/
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virtual TInt RegisterAudioStreamObserver(MAudioStreamAdaptationObserver& aObserver) = 0 ;
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/**
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Returns if a Audio Stream Observer was UnRegistered.
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@param MAudioStreamAdaptationObserver
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Observer object witch will be unregistered
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*/
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virtual void UnregisterAudioStreamObserver(MAudioStreamAdaptationObserver& aObserver) = 0;
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virtual void UnregisterAllAudioStreamObserver() = 0;
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virtual void SetFourCC(const CFourCCConvertor& aFourCCConvertor) = 0;
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private:
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/** iDtor_ID_Key Instance identifier key. When instance of an
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* implementation is created by ECOM framework, the
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* framework will assign UID for it. The UID is used in
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* destructor to notify framework that this instance is
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* being destroyed and resources can be released.
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*/
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TUid iDtor_ID_Key;
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};
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#include "audiostreamadaptation.inl"
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#endif // C_AUDIOCOMPONENTMANAGER_H
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