--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devsound/sounddevbt/src/server/Policy/MmfBtAudioPolicy.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,369 @@
+// Copyright (c) 2001-2009 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 "MmfBtAudioPolicy.h"
+#include "MmfBtAudioPolicySession.h"	
+#include "MmfBtAudioPolicyServer.h"
+#include "MdaBtHwInfo.h"	
+#include "MmfBtAudioPolicyRequest.h"
+
+CAudioPolicy::~CAudioPolicy()
+	{
+	delete iMdaHwInfo;
+	delete iAudioPolicyRequestArray; 		
+	}
+
+void CAudioPolicy::ConstructL()
+	{
+	// Create dynamic array for sessions list
+	iAudioPolicyRequestArray = new(ELeave)CArrayFixFlat<CMMFAudioPolicyRequest>(CAudioPolicy::EGranularity);
+	iMdaHwInfo = CMdaHwInfo::NewL();
+	}
+
+EXPORT_C CAudioPolicy* CAudioPolicy::NewL(CMMFAudioPolicyServer* aAudioPolicyServer)
+	{	
+
+	CAudioPolicy* self = new(ELeave)CAudioPolicy(aAudioPolicyServer);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop();
+	return(self);
+	}
+
+CAudioPolicy::CAudioPolicy(CMMFAudioPolicyServer* aAudioPolicyServer) :
+	iAudioPolicyServer(aAudioPolicyServer)
+	{
+	}
+
+void CAudioPolicy::MakeRequest(CMMFAudioPolicyRequest* aAudioPolicyRequest)
+	{
+	//Make sure there is sufficient space in the array to avoid expansion in AppendL() 
+	__ASSERT_ALWAYS(iAudioPolicyRequestArray->Count() < iAudioPolicyServer->PolicySessionCount(), Panic(EMMFAudioPolicyRequestArrayOverflow));
+	TPolicyResponse responseValue; 
+	iSessionToAlert = NULL; // Reset
+
+	// Process Request by looking at priorities, preferences, special states...
+	responseValue = ProcessRequest(aAudioPolicyRequest);
+
+		// Finally, check current profile settings (only if not denied thus far):
+		//	CheckAgainstProfiles(aAudioPolicyRequest, responseValue);
+		if (responseValue == EDenied)
+			{
+			SetSessionToAlert(aAudioPolicyRequest->PolicySessionId(),
+							  NULL, TMMFAudioPolicyEvent::EMMFAudioPolicyPriorityTooLow,
+							  aAudioPolicyRequest->State());
+			if(IsRegisteredNotification(aAudioPolicyRequest->PolicySessionId()))
+				{
+				TRAPD(err, iAudioPolicyRequestArray->AppendL(*aAudioPolicyRequest) );
+				__ASSERT_ALWAYS(err==KErrNone, Panic(EMMFAudioPolicyRequestArrayOverflow) ); // we reserved space, so shouldn't hit this
+				}
+			}
+
+	// If a client needs to be notified (either a previous session that was booted off or a new
+	// one that was denied) then send event for that session to the client:
+	// NB KErrInUse, KErrDied OR KErrAccessDenied may be used to indicate this.
+	if (iSessionToAlert != NULL)
+		{
+			//check the session is registered for notification of resource available
+			if(!IsRegisteredNotification(iSessionToAlert))
+				{
+				RemoveFromList(iSessionToAlert);  				
+				}
+			iAudioPolicyEvent.iErrorCode = KErrInUse;
+			iAudioPolicyEvent.iState = aAudioPolicyRequest->State();
+			iAudioPolicyServer->SendEventToClient(iSessionToAlert, iSessionToBeLaunched, iAudioPolicyEvent);
+		}
+		//Resume of a Audio of the notified client ,since it is already in the list 
+		//no need to append and send response back to DevSound for request accepted.
+		if(responseValue == EResume)
+			{
+			iAudioPolicyServer->StopNotificationTimer();
+			iAudioPolicyEvent.iErrorCode = KErrNone;
+			iAudioPolicyEvent.iEventType = TMMFAudioPolicyEvent::EMMFAudioPolicyNoEvent;
+			iAudioPolicyEvent.iState = aAudioPolicyRequest->State();
+			iAudioPolicyServer->SendEventToClient(aAudioPolicyRequest->PolicySessionId(), NULL, iAudioPolicyEvent);	
+			}
+		// Add new policy to list, and send response back to DevSound for request accepted
+	if (responseValue == EProceed)
+		{
+		//no possibility of expansion here as sufficient space for the array is reserved in advance during the creation of the policysession
+		TRAPD(err, iAudioPolicyRequestArray->AppendL(*aAudioPolicyRequest) );
+		__ASSERT_ALWAYS(err==KErrNone,Panic(EMMFAudioPolicyRequestArrayOverflow) ); // we reserved space, so shouldn't hit this
+		iAudioPolicyEvent.iErrorCode = KErrNone;
+		iAudioPolicyEvent.iEventType = TMMFAudioPolicyEvent::EMMFAudioPolicyNoEvent;
+		iAudioPolicyEvent.iState = aAudioPolicyRequest->State();
+		iAudioPolicyServer->SendEventToClient(aAudioPolicyRequest->PolicySessionId(), NULL, iAudioPolicyEvent);
+		}
+	if (responseValue == EStopThenProceed)  // place on list, but dev Sound will launch request
+		{
+		//no possibility of expansion here as sufficient space for the array is reserved in advance during the creation of the policysession
+		TRAPD(err, iAudioPolicyRequestArray->AppendL(*aAudioPolicyRequest) );
+		__ASSERT_ALWAYS(err==KErrNone,Panic(EMMFAudioPolicyRequestArrayOverflow) ); // we reserved space, so shouldn't hit this
+		}
+	}
+
+TPolicyResponse CAudioPolicy::ProcessRequest(CMMFAudioPolicyRequest* aAudioPolicyRequest)
+	{
+	TPolicyResponse responseValue(EProceed); 
+	iSessionToAlert = NULL; // Reset
+
+	// If there is no other item on list, return with proceed
+	if (!iAudioPolicyRequestArray->Count()) 
+		return EProceed;
+	
+	// Handle Preferences, if any, otherwise just compare priorities:
+	//	HandlePreferences(aAudioPolicyRequest, preference, responseValue);
+	if(IsNotified())
+		{
+		return EResume;
+		}
+	responseValue = ComparePriorities(aAudioPolicyRequest);
+
+	return responseValue;
+	}
+
+void CAudioPolicy::ModifyEntry(TInt aPolicySessionId, CMMFAudioPolicyRequest* aAudioPolicyRequest)
+	{
+	TMMFAudioPolicyState requestState = aAudioPolicyRequest->State();
+	// If state is stopped or paused, remove item from list
+	if ((aAudioPolicyRequest->State() == EMMFStatePaused) || (aAudioPolicyRequest->State() == EMMFStateStopped) || (aAudioPolicyRequest->State() == EMMFStateCompleted))
+		{
+		if(iSessionToBeLaunched == aPolicySessionId)
+			{
+			iSessionToBeLaunched = 0;
+			}
+		if((aAudioPolicyRequest->State() == EMMFStateStopped) && (!iSessionToBeLaunched))
+			{	
+			TInt sessionToNotify = CheckSessionToNotify();
+			if(sessionToNotify)
+				{
+				iAudioPolicyServer->StartNotificationTimer();
+				iAudioPolicyEvent.iErrorCode = KErrNone;
+				iAudioPolicyEvent.iEventType = TMMFAudioPolicyEvent::EMMFAudioPolicyResourceNotification;
+				iAudioPolicyServer->SendEventToClient(sessionToNotify, NULL, iAudioPolicyEvent);
+				}	
+			}
+			if(aAudioPolicyRequest->NotificationEvent() != KMMFEventCategoryAudioResourceAvailable)
+				{
+				RemoveFromList(aPolicySessionId);	
+				return;
+				}
+		}
+	
+	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+		{
+			// Find correct entry to replace state	
+			if ( ((*iAudioPolicyRequestArray)[index].PolicySessionId()) == aPolicySessionId)
+				{
+					(*iAudioPolicyRequestArray)[index].SetState(requestState);
+					break;
+				}
+		}  
+	}
+
+void CAudioPolicy::RemoveFromList(TInt aPolicySessionId)
+	{
+	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+		{
+			// Find correct entry to remove	
+			if ( (*iAudioPolicyRequestArray)[index].PolicySessionId() == aPolicySessionId)
+				{
+					iAudioPolicyRequestArray->Delete(index);
+					break;
+				}
+		}  
+	}
+	
+TPolicyResponse CAudioPolicy::ComparePriorities(CMMFAudioPolicyRequest* aAudioPolicyRequest/*, TMMFAudioPolicyEvent& aEvent*/)
+	{
+	TPolicyResponse responseValue(EProceed);
+	TInt requestPriority = aAudioPolicyRequest->Priority();
+
+	TBool requestCaps = aAudioPolicyRequest->Capabilities();
+
+	// Iterate through list and compare priorities:
+	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+		{
+			// If there's even one on the list w/ a higher priority deny request and leave:
+
+			if ((*iAudioPolicyRequestArray)[index].Capabilities() > requestCaps)
+				{
+				responseValue = EDenied;
+				break;
+				}
+			else if((*iAudioPolicyRequestArray)[index].Capabilities() == requestCaps) 
+				{
+					if((*iAudioPolicyRequestArray)[index].Priority() >= requestPriority)
+					{
+						responseValue = EDenied;
+						break;
+					}
+				}
+
+
+			// Otherwise have the one on the list removed:
+				SetSessionToAlert((*iAudioPolicyRequestArray)[index].PolicySessionId(), 
+					aAudioPolicyRequest->PolicySessionId(), TMMFAudioPolicyEvent::EMMFAudioPolicyPriorityTooLow, aAudioPolicyRequest->State());
+				responseValue = EStopThenProceed;
+		}    
+	return responseValue;
+	}
+
+void CAudioPolicy::HandlePreferences(CMMFAudioPolicyRequest* /*aAudioPolicyRequest*/, TInt /*aPref*/, TPolicyResponse& /*aResponse*/)
+	{
+	}
+
+void CAudioPolicy::LaunchRequest()
+	{
+	if (iAudioPolicyEventToLaunch.iEventType == TMMFAudioPolicyEvent::EMMFAudioPolicySwitchToIdle)
+		iAudioPolicyServer->LaunchRequest(iSessionToBeLaunched, iAudioPolicyEventToLaunch);
+	}
+
+// Sets up session information for sending an event on a denied (or killed) request
+void CAudioPolicy::SetSessionToAlert(TInt aSessionToAlert, TInt aSessionToBeLaunched, TMMFAudioPolicyEvent::TAudioPolicyEventType aEventType, TMMFAudioPolicyState aState )
+	{
+	iSessionToAlert = aSessionToAlert;
+	iSessionToBeLaunched = aSessionToBeLaunched;
+	iAudioPolicyEvent.iEventType = aEventType;
+
+	if (iSessionToBeLaunched != 0)  // When currently playing item needs to be stopped
+		{
+		iAudioPolicyEventToLaunch.iEventType = TMMFAudioPolicyEvent::EMMFAudioPolicySwitchToIdle;
+		iAudioPolicyEventToLaunch.iState = aState;
+		}
+	}
+
+CArrayFixFlat<CMMFAudioPolicyRequest>* CAudioPolicy::AudioPolicyRequestArray()
+	{
+	return iAudioPolicyRequestArray;
+	}
+	
+/**
+@internalTechnology
+
+This function raises a panic
+
+@param	aError
+		one of the several panics codes that may be raised by this dll
+
+@panic	EMMFAudioPolicyRequestArrayOverflow is raised when policyrequest array is full
+*/
+GLDEF_C void Panic(TMMFAudioPolicyPanicCodes aPanicCode)
+	{
+	User::Panic(KMMFAudioPolicyPanicCategory, aPanicCode);
+	}
+
+// checks based on the session ,Is the session is registered for Notification 
+TBool CAudioPolicy::IsRegisteredNotification(TInt aSessionId)
+	{
+	TUid event;
+ 	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+ 		{
+ 		if((*iAudioPolicyRequestArray)[index].PolicySessionId() == aSessionId)
+ 			{
+ 			event = (*iAudioPolicyRequestArray)[index].NotificationEvent();
+ 			if (event  == KMMFEventCategoryAudioResourceAvailable)
+ 				{
+ 				// only when the client is registered for KMMFEventCategoryAudioResourceAvailable event
+ 				return ETrue; 
+ 				}
+ 			break;	
+ 			} 
+ 		} 
+ 	return EFalse;
+	}
+
+// checks the state,whether any client is already send notification
+TBool CAudioPolicy::IsNotified()
+	{
+ 	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+ 		{
+		if((*iAudioPolicyRequestArray)[index].State() == EMMFStateNotified)
+			{
+			// In a instance only one client should have the state as EMMFStateNotified
+			return ETrue;
+			}
+ 		}
+ 	return EFalse;
+	}
+
+// get the next highest priority of the client to notify 	
+TInt CAudioPolicy::CheckSessionToNotify()
+	{
+	TInt nextHighestPriority= -100;
+	TInt sessionToNotify = 0;
+	TInt notificationIdx = -1;
+	if(IsNotified())
+		{
+		return sessionToNotify;
+		}
+	// get the max priority and set the Index 		
+	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+ 		{
+ 		if((nextHighestPriority <= (*iAudioPolicyRequestArray)[index].Priority()) && ((*iAudioPolicyRequestArray)[index].NotificationEvent() != KNullUid) && (!(*iAudioPolicyRequestArray)[index].IsEventNotified()))
+ 			{
+ 			nextHighestPriority = (*iAudioPolicyRequestArray)[index].Priority();
+ 			sessionToNotify = (*iAudioPolicyRequestArray)[index].PolicySessionId();
+ 			notificationIdx = index;
+ 			}
+ 		}
+ 	// set the state as notified	
+ 	if(notificationIdx != -1)
+ 		{
+ 		(*iAudioPolicyRequestArray)[notificationIdx].SetEventFlag(ETrue);	
+ 		(*iAudioPolicyRequestArray)[notificationIdx].SetState(EMMFStateNotified);	
+ 		}
+  	return sessionToNotify;	
+	}
+
+// send the message to the server 
+void CAudioPolicy::DoSendNotification()
+	{
+	ResetNotification();
+	TInt sessionToNotify = CheckSessionToNotify();
+	if(sessionToNotify)
+		{
+		iAudioPolicyEvent.iErrorCode = KErrNone;
+		iAudioPolicyEvent.iEventType = TMMFAudioPolicyEvent::EMMFAudioPolicyResourceNotification;
+		iAudioPolicyServer->SendEventToClient(sessionToNotify, NULL, iAudioPolicyEvent);
+		}
+	}
+
+// Set in the AudiopolicyRequestArray the uid registered
+TInt CAudioPolicy::SetNotification(TInt aSessionId, TUid aEventType)
+	{
+	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+ 		{
+ 		if((*iAudioPolicyRequestArray)[index].PolicySessionId() == aSessionId)
+ 			{
+ 			(*iAudioPolicyRequestArray)[index].SetNotificationEvent(aEventType);
+ 			return ETrue;	
+ 			}
+ 		}
+ 	return EFalse;
+	}
+
+// cancel the state of the message notification to closed 
+void 	CAudioPolicy::ResetNotification()
+	{
+ 	for (TInt index = 0; index < iAudioPolicyRequestArray->Count(); index++)
+ 		{
+		if((*iAudioPolicyRequestArray)[index].State() == EMMFStateNotified)
+			{
+			(*iAudioPolicyRequestArray)[index].SetState(EMMFStateClosed);
+			}
+ 		}
+ 	}
+