--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devsound/devsoundrefplugin/tsrc/a3fcistubextn/a3fcistubextn.cpp	Fri Oct 08 19:40:43 2010 +0100
@@ -0,0 +1,308 @@
+// Copyright (c) 2008-2009 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:
+//
+
+#include "a3fcistubextn.h"
+#include <ecom/ecom.h>
+#include <ecom/implementationproxy.h>
+#include "a3fcistubextn.hrh"
+
+#include <a3f/maudiocontext.h>
+#include <a3f/maudiostream.h>
+#include <a3f/maudioprocessingunit.h>
+#include <a3f/maudiogaincontrol.h>
+#include <a3f/audioprocessingunittypeuids.h>
+
+//      
+#include "a3fbackdooraccess.h"
+#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS
+#include <mmf/common/mmfipcserver.h>
+#endif
+
+
+// __________________________________________________________________________
+// Client-side extension
+
+MDevSoundCIClientExtension* CA3fClientCiStubExtn::NewL()
+	{
+	CA3fClientCiStubExtn* self = new (ELeave) CA3fClientCiStubExtn;
+	return self;
+	}
+	
+CA3fClientCiStubExtn::~CA3fClientCiStubExtn()
+	{
+	delete iDummyBuffer;
+	REComSession::DestroyedImplementation(iKey);
+	}
+	
+TInt CA3fClientCiStubExtn::Setup(MCustomCommand& aCustomCommand)
+	{
+	iCommand = &aCustomCommand;
+	iDummyBuffer=KNullDesC().Alloc(); // dummy buffer simulates some allocs
+	if (!iDummyBuffer)
+		{
+		return KErrNoMemory;
+		}
+	return KErrNone;
+	}
+	
+TInt CA3fClientCiStubExtn::CustomInterfaceExtension(TUid aUid, TAny*& aInterface)
+	{
+	if (aUid==KUidTestSetVolIf)
+		{
+		MTestSetVolIf* interface = this;
+		aInterface = interface;
+		return KErrNone;
+		}
+	return KErrNotSupported;
+	}
+	
+void CA3fClientCiStubExtn::Release()
+	{
+	delete this;
+	}
+
+void CA3fClientCiStubExtn::PassDestructorKey(TUid aDestructorKey)
+	{
+	iKey = aDestructorKey;
+	}
+	
+TInt CA3fClientCiStubExtn::SetVol(TInt aVol)
+	{
+	// the key here is the destination package, which represets SetVol. Apart from value
+	// the rest of the parameters can be ignored
+	TPckgBuf<TInt> volumePkg (aVol);
+	TMMFMessageDestinationPckg setVolDest (TMMFMessageDestination(KUidTestSetVolIf, 0));
+	TInt result = iCommand->CustomCommandSync(setVolDest, ETestSetVolIfSetVolCommand, volumePkg, KNullDesC8);
+	return result;
+	}
+
+TInt CA3fClientCiStubExtn::Vol(TInt aMaxVol)
+    {
+    // again the key is is the destination package
+    TPckgBuf<TInt> maxVolPkg (aMaxVol);
+    TMMFMessageDestinationPckg setVolDest (TMMFMessageDestination(KUidTestSetVolIf, 0));
+    TInt result = iCommand->CustomCommandSync(setVolDest, ETestSetVolIfVolCommand, maxVolPkg, KNullDesC8);
+    return result;
+    }
+
+// __________________________________________________________________________
+// Server-side extension
+
+MDevSoundCIServerExtension* CA3fServerCiStubExtn::NewL()
+	{
+	CA3fServerCiStubExtn* self = new (ELeave) CA3fServerCiStubExtn;
+	return self;
+	}
+	
+CA3fServerCiStubExtn::~CA3fServerCiStubExtn()
+	{
+	delete iDummyBuffer;
+	delete iSetVol;
+	REComSession::DestroyedImplementation(iKey);
+	}
+	
+TInt CA3fServerCiStubExtn::Setup(MCustomInterface& aCustomInterface)
+	{
+	iInterface = &aCustomInterface;
+	iDummyBuffer=KNullDesC().Alloc(); // dummy buffer simulates some allocs
+	if (!iDummyBuffer)
+		{
+		return KErrNoMemory;
+		}
+	return KErrNone;
+	}
+	
+TInt CA3fServerCiStubExtn::HandleMessageL(const RMmfIpcMessage& aMessage)
+	{
+	TMMFMessageDestinationPckg destinationPckg;
+	MmfMessageUtil::ReadL(aMessage, 0, destinationPckg);
+	if (destinationPckg().InterfaceId()==KUidTestSetVolIf)
+		{
+		CSetVol* volHandler = CSetVol::NewL(*iInterface);
+		CleanupStack::PushL(volHandler);
+		TInt result = volHandler->HandleMessageL(aMessage);
+		CleanupStack::Pop(volHandler);
+		return result;
+		}
+
+	return KErrNotSupported;
+	}
+	
+void CA3fServerCiStubExtn::Release()
+	{
+	delete this;
+	}
+
+void CA3fServerCiStubExtn::PassDestructorKey(TUid aDestructorKey)
+	{
+	iKey = aDestructorKey;
+	}
+	
+// CSetVol
+
+CSetVol* CSetVol::NewL(MCustomInterface& aCustomInterface)
+	{
+	CSetVol* self = new (ELeave) CSetVol(aCustomInterface);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop(self);
+	return self;
+	}
+	
+CSetVol::CSetVol(MCustomInterface& aCustomInterface):
+	iInterface(&aCustomInterface)
+	{
+	// do nothing
+	}
+		
+void CSetVol::ConstructL()
+	{
+	iWait = new (ELeave) CActiveSchedulerWait();
+	}
+	
+CSetVol::~CSetVol()
+	{
+	delete iWait;
+	}
+	
+TInt CSetVol::HandleMessageL(const RMmfIpcMessage& aMessage)
+	{
+    switch (aMessage.Function())
+        {
+        case ETestSetVolIfSetVolCommand:
+            {
+            TPckgBuf<TInt> volPckg;
+            MmfMessageUtil::ReadL(aMessage, 1, volPckg);
+            UpdateA3fPointers(); // grab pointers to context, stream etc
+            SetVolumeL(volPckg());
+
+            User::LeaveIfError(iContext->RegisterAudioContextObserver(*this));
+
+            TInt error = iContext->Commit();
+            if (!error)
+                {
+                iError = KErrNone;
+                iWait->Start();
+                error = iError;
+                }
+            (void) iContext->UnregisterAudioContextObserver(*this);
+
+            aMessage.Complete(error);
+            return KErrNone; // KErrNone says we've handled the message
+            }
+        case ETestSetVolIfVolCommand:
+            {
+            TPckgBuf<TInt> maxVolPckg;
+            MmfMessageUtil::ReadL(aMessage, 1, maxVolPckg);
+            UpdateA3fPointers(); // grab pointers to context, stream etc
+            TInt result = VolumeL(maxVolPckg());
+            aMessage.Complete(result);
+            return KErrNone; // KErrNone says we've handled the message
+            }
+        default:
+            return KErrArgument;
+        }
+	}
+	
+void CSetVol::UpdateA3fPointers()
+	{
+	MA3FBackdoorAccessIf* backdoor = 
+		static_cast<MA3FBackdoorAccessIf*>(iInterface->CustomInterface(KA3FBackdoorAccessIfUid));
+	if (backdoor)
+		{
+		iContext = backdoor->AudioContext();
+		iStream = backdoor->AudioStream();
+		iGain = backdoor->ProcessingUnit(KUidAudioGainControl);
+		}
+	else
+		{
+		iContext = NULL;
+		iStream = NULL;
+		iGain = NULL;
+		}
+	}
+	
+void CSetVol::SetVolumeL(TInt aVolume)
+	{
+	RArray<TAudioChannelGain>	channelGains;
+	CleanupClosePushL(channelGains);
+	TAudioChannelGain left;
+	TAudioChannelGain right;	
+	left.iLocation = TAudioChannelGain::ELeft;
+	right.iLocation = TAudioChannelGain::ERight;
+	left.iGain = right.iGain = aVolume;
+	User::LeaveIfError(channelGains.Append(left)); // assumed element 0 in rest of code
+	User::LeaveIfError(channelGains.Append(right)); // assumed element 1 in rest of code
+
+	MAudioGainControl* gainControl = static_cast<MAudioGainControl*>(iGain->Interface(KUidAudioGainControl));
+	User::LeaveIfError(gainControl->SetGain(channelGains));	
+	CleanupStack::PopAndDestroy(&channelGains);
+	}
+
+TInt CSetVol::VolumeL(TInt aMaxVolume)
+    {
+    RArray<TAudioChannelGain>   channelGains;
+    CleanupClosePushL(channelGains);
+    TInt maxGain;
+
+    MAudioGainControl* gainControl = static_cast<MAudioGainControl*>(iGain->Interface(KUidAudioGainControl));
+    User::LeaveIfError(gainControl->GetGain(channelGains));
+    User::LeaveIfError(gainControl->GetMaxGain(maxGain));
+
+    TInt basicVolume = (channelGains[0].iGain + channelGains[1].iGain) / 2;
+    TInt result = basicVolume * aMaxVolume / maxGain; // scale to 0 to maxVolume
+
+    CleanupStack::PopAndDestroy(&channelGains);
+    return result;
+    }
+	
+void CSetVol::ContextEvent(TUid aEvent, TInt aError)
+	{
+	if (aEvent==KUidA3FContextUpdateComplete || aEvent==KUidA3FContextAbort)
+		{
+		// we are going to assume the SetGain() works and use the end of
+		// the ContextEvent. Really should observe the gain itself
+		if (aError)
+			{
+			iError = aError;
+			}
+		iWait->AsyncStop();
+		}
+	}
+		
+//
+// ImplementationTable
+//
+
+const TImplementationProxy ImplementationTable[] = 
+	{
+	IMPLEMENTATION_PROXY_ENTRY(KUidA3fClientCiStubExtn, CA3fClientCiStubExtn::NewL),
+	IMPLEMENTATION_PROXY_ENTRY(KUidA3fServerCiStubExtn, CA3fServerCiStubExtn::NewL),
+	};
+
+
+//
+// ImplementationGroupProxy
+//
+//
+
+EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)
+	{
+	aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);
+
+	return ImplementationTable;
+	}
+
+