--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/baseport/syborg/soundsc/virtio_audio.h	Thu Mar 04 00:55:21 2010 +0000
@@ -0,0 +1,103 @@
+/*
+* This component and the accompanying materials are made available
+* under the terms of the License "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:
+* Accenture Ltd
+*
+* Contributors:
+*
+* Description: This file is a part of sound driver for Syborg adaptation.
+*
+*/
+
+#ifndef VIRTIO_AUDIO_H
+#define VIRTIO_AUDIO_H
+
+#include "virtio_audio_defs.h"
+#include "virtio_defs.h"
+#include "virtio.h"
+
+#include <e32def.h>
+
+namespace VirtIo
+{
+
+namespace Audio
+{
+
+/// Encapsulates routines that affect VirtIo Audio device's Stream.
+/// DControl object may share ioHandler with other DControl objects.
+/// especially Control Queue.
+class DControl : public DBase
+	{
+	static const TUint KCmdMaxBufCount = 8;
+	static const TUint KControlQueueId = 0;
+public:
+	enum Command { ERun = 5, EStop, EPause, EResume };
+	
+	DControl( VirtIo::MIoHandler& aIoHandler, TUint32 aDataQueueId )
+	: iIoHandler( aIoHandler ), iDataQueueId( aDataQueueId)
+		{}
+		
+	~DControl();
+		
+	TInt Construct();
+	
+	/// sets up stream parameters.
+	TInt Setup( StreamDirection aDirection, TInt aChannelNum, 
+		FormatId aFormat, TInt aFreq );
+		
+	/// @brief posts a data buffer. 
+	///
+	/// The virtaulAddr is going to be turned into 
+	/// a physical address scatter gather list.
+	TInt SendDataBuffer( TAny* virtaulAddr, TUint aSize, Token aToken );
+	
+	/// Sends a specific command
+	void SendCommand( Command aCmd )
+		{ AddCommand( aCmd ); ControlQueue().Sync(); }
+
+	/// Return Data Queue of the stream.
+	MQueue& DataQueue()
+		{ return iIoHandler.Queue(iDataQueueId); }
+
+	/// Returns Control Queue of the associated device.
+	MQueue& ControlQueue()
+		{ return iIoHandler.Queue(KControlQueueId); }	
+
+private:
+	// size of this struct needs to be power2 aligned
+	// we extend original TCommand with padding to ensure this
+	struct TCommandPadded: public TCommand
+		{
+		static const TUint KPaddingSize = POW2ALIGN(sizeof(TCommand))-sizeof(TCommand);
+		TUint8 iPadding[KPaddingSize];
+		};
+	
+	void AddCommand( TCommandPadded* aCmd, Token aToken );
+	
+	void AddCommand( TCommandPadded* aCmd, Token aToken, TAny* mem, TUint size );
+
+	void AddCommand( Command aCmd );
+
+	void WaitForCompletion();
+	static TBool CheckProcessing( TAny* aSelf );
+	
+	VirtIo::MIoHandler& iIoHandler;
+	TUint iDataQueueId;
+	
+	TUint8* iCmdMem; // managed
+	TCommandPadded* iCmd; // unmanaged
+	TBufferInfo* iBufferInfo; // unmanaged
+	
+	StreamDirection iDirection;
+	};
+
+} // namespace Audio
+} // namespace VirtIo
+
+
+#endif