--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bluetoothengine/btsac/inc/btaudiostreaminputbase.h	Mon Jan 18 20:28:57 2010 +0200
@@ -0,0 +1,187 @@
+/*
+* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  ?Description
+*
+*/
+
+
+#ifndef __BTAUDIOSTREAMINPUTBASE_H__
+#define __BTAUDIOSTREAMINPUTBASE_H__
+
+#include <e32base.h>
+#include <e32std.h>
+#include <mmf/common/mmfutilities.h> 
+
+/**
+ *  Observer interface for receiving the audio data buffers. 
+ *
+ *  This class defines an observer interface to be implemented by the 
+ *  class that is going to receive the audio data. 
+ *
+ *  @lib btaudioadaptation.lib 
+ *  @since S60 v3.1
+ */
+class MBTAudioStreamObserver 
+{
+public: 
+    /**
+     * Method for receiving audio data and an associated timestamp. 
+     *
+     * @since S60 v3.1 
+     * @param aBuffer the audio data frames from the encoder. 
+     * @param aTimestamp the timestamp of the first audio frame in the aBuffer 
+     * @return a Symbian OS wide error code. 
+     */
+	virtual TInt Receive(const TDesC8& aBuffer, TTimeIntervalMicroSeconds aTimestamp) = 0;
+
+    /**
+     * Method for receiving audio data. 
+     *
+     * @since S60 v3.1 
+     * @param aBuffer the audio data frames from the encoder. 
+     * @return a Symbian OS wide error code. 
+     */
+	virtual TInt Receive(const TDesC8& aBuffer) = 0;
+}; 
+
+/**
+ *  Observer interface for receiving the audio adaptation errors. 
+ *
+ *  This class defines an observer interface to be implemented by the 
+ *  class that is going to receive the errors that have occurred in 
+ *  BT Audio Adaptation or in the audio subsystem. 
+ *
+ *  To be implemented by a class who uses this adaptation class. 
+ *  @lib btaudioadaptation.lib 
+ *  @since S60 v3.1
+ */
+class MBTAudioErrorObserver 
+{
+public: 
+    /**
+ 		 *  Method for receiving the errors. 
+     *
+     * @since S60 v3.1 
+     * @param aError a Symbian OS wide error code. 
+     * @return a Symbian OS wide error code. 
+     */
+	virtual TInt Error(const TInt aError) = 0;
+}; 
+
+/**
+ *  This class specifies the interface for receiving audio data from audio subsystem. 
+ *
+ *  This class contains the interface definition. It can't be instantiated directly, 
+ *  but instead the implementation is done in the class inherited from this class. 
+ *  
+ *  Also, the factory method for the base class must be implemented by the 
+ *  implementator of this interface. 
+ *
+ *  @lib btaudioadaptation.lib
+ *  @since S60 v3.1 
+ */
+class CBTAudioStreamInputBase : public CBase
+{
+public: 
+    IMPORT_C static CBTAudioStreamInputBase* NewL( MBTAudioStreamObserver &aStreamObserver, MBTAudioErrorObserver &aErrorObserver );
+
+    /**
+     * This method is for connecting to the audio subsystem. 
+     *
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param void. 
+     * @return a Symbian OS wide error code. 
+     */
+    virtual TInt Connect() = 0;
+
+    /**
+     * This method is for disconnecting from the audio subsystem. 
+     *
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param void. 
+     * @return void
+     */
+    virtual void Disconnect() = 0;
+
+    /**
+     * This method is for passing the custom interfaces that are 
+     * needed sometimes for configuring the hardware encoder. 
+     *
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param aInterfaceId specifies the id of custom interface that the client 
+     *        wants to get. 
+     * @return  A pointer to the requested interface. Client must cast it into a correct class. 
+     */
+    virtual TAny *EncoderInterface(TUid aInterfaceId) = 0;
+
+    /**
+     * This method is for choosing the encoder for the audio data. 
+     *
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param aDesiredFourCC specifies the encoder that the client wants to use. 
+     * @return a Symbian OS wide error code. 
+     */
+    virtual TInt SetFormat(TFourCC aDesiredFourCC) = 0; 
+
+    /**
+     * This method is for starting the recording from the audio subsystem. 
+     *
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param void. 
+     * @return a Symbian OS wide error code. 
+     */
+    virtual TInt Start() = 0;
+
+    /**
+     * This method is for stopping the recording from the audio subsystem. 
+     *
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param void. 
+     * @return a Symbian OS wide error code. 
+     */
+    virtual void Stop() = 0;
+
+    /**
+	 * This method is called when the client has processed the buffer it got 
+	 * from the Receive method. 
+	 * 
+     * See BT Audio Adaptation API and BT Audio Adaptation Design specifications 
+     * for detailed explanation. 
+     *
+     * @since S60 v3.1
+     * @param aBuffer refers to the buffer that was received earlier in the Receive method. 
+     * @return  void
+     */
+    virtual void BufferEmptied( const TDesC8 &aBuffer ) = 0;
+}; 
+
+#endif