//mmfaudioserver.cpp

// 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:

// Portions Copyright Nokia-Symbian * Nokia Core OS *

// INCLUDE FILES

//

#include <e32math.h>

#include <mmf/common/mmfbase.hrh>

#include "mmfaudioserver.h"

#include "mmfaudioserverdecs.h"

#include "mmfdevsoundsession.h"

#include "mmfaudioserversession.h"

#include "mmfdevsoundserver.h"

#include "mmfdevsoundserverstart.h"

#include "mmfaudioserverfactory.h"

#include "devsoundsvrthreadpriorityconsts.h"

#ifdef _DEBUG

#include "e32debug.h"

#define SYMBIAN_DEBPRN0(str)    RDebug::Print(str, this)

#else

#define SYMBIAN_DEBPRN0(str)

#endif //_DEBUG

// Time delay that the audio server wait before shutdown itself when is detected that the last DevSoundSession is closed

const TInt KAudioServerShutDownDelay = 50000000; //50 sec

// ======== LOCAL FUNCTIONS ========

void Panic(TInt aPanicCode)

	{

	_LIT(KAudioServerPanicCategory, "mmfaudioserver");

	User::Panic(KAudioServerPanicCategory, aPanicCode);

	}

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CMMFAudioServer::NewL

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

CMMFAudioServer* CMMFAudioServer::NewL()

	{

	CMMFAudioServer* self = new(ELeave) CMMFAudioServer();

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CMMFAudioServer

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

CMMFAudioServer::CMMFAudioServer()

	: CMmfIpcServer(EPriorityStandard)

	{

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::ConstructL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::ConstructL()

	{

	SYMBIAN_DEBPRN0(_L("CMMFAudioServer[0x%x]::ConstructL - enter"));

	SetPinClientDescriptors(ETrue);

	// Call base class to Start server

	StartL(KAudioServerName);

	iFourCCConvertor = CFourCCConvertor::NewL();

	iDelayAudioServerShutDown = CDelayAudioServerShutDown::NewL();

	iFactory = CMMFAudioServerFactory::NewL();

	iFactory->StartL(*this);	

	SYMBIAN_DEBPRN0(_L("CMMFAudioServer[0x%x]::ConstructL - exit"));

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::~CMMFAudioServer

// Destructor

// -----------------------------------------------------------------------------

//

CMMFAudioServer::~CMMFAudioServer()

	{

	if (iDelayAudioServerShutDown)

		{

		iDelayAudioServerShutDown->Cancel();

		delete iDelayAudioServerShutDown;

		iDelayAudioServerShutDown = NULL;

		}

	for(TInt i=(iDevSoundServList.Count()-1); i >=0 ; i--)

		{

		CStartAndMonitorDevSoundThread* devSoundMonitorThread = iDevSoundServList[i];

		iDevSoundServList.Remove(i);

		delete devSoundMonitorThread;

		}

	iDevSoundServList.Close();

	delete iFourCCConvertor;

	if (iFactory)

		{

		iFactory->Stop(*this);

		delete iFactory;

		}

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::NewSessionL

// Creates a new session to handle requests by the client and returns it to the

// client server framework.

// -----------------------------------------------------------------------------

//

CMmfIpcSession* CMMFAudioServer::NewSessionL(const TVersion& aVersion) const

	{

	SYMBIAN_DEBPRN0(_L("CMMFAudioServer[0x%x]::NewSessionL - enter"));

	TVersion v(KMMFAudioServerVersion,

			KMMFAudioServerMinorVersionNumber,

			KMMFAudioServerBuildVersionNumber);

	if(!User::QueryVersionSupported(v, aVersion))

		{

		User::Leave(KErrNotSupported);

		}

	for(TInt i=(iDevSoundServList.Count()-1); i >=0 ; i--)

		{

		CStartAndMonitorDevSoundThread* devSoundMonitorThread = iDevSoundServList[i];

		if(!devSoundMonitorThread->IsActive())

			{

			iDevSoundServList.Remove(i);

			delete devSoundMonitorThread;

			}

		iDevSoundServList.Compress();

		}

	RMMFDevSoundServerProxy devSoundSessionHandle;

	User::LeaveIfError(StartDevSoundServer(devSoundSessionHandle));

	CMMFAudioServerSession* audioServerSession = CMMFAudioServerSession::NewL(devSoundSessionHandle);

	SYMBIAN_DEBPRN0(_L("CMMFAudioServer[0x%x]::NewSessionL - session created"));

	return audioServerSession;

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::IncrementSessionId

// Increment the session Id.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::IncrementSessionId()

	{

	iAudioServerSessionId++;

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::DecrementSessionId

// Decrement the session Id.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::DecrementSessionId()

	{

	iAudioServerSessionId--;

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::IncrementDevSoundCount

// Increment the DevSound server counter. If there is atleast one DevSound

// server, it will cancel its shutdown timer.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::IncrementDevSoundCount()

	{

	iDevSoundCount++;

	//in the case we started the shutdown due to no more DevSound

	if(iDevSoundCount)

		{

		ASSERT(iDelayAudioServerShutDown);

		if (iDelayAudioServerShutDown)

			{

			iDelayAudioServerShutDown->Cancel();

			}

		}

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::DecrementDevSoundCount

// Decrement the DevSound server counter. Once the number of DevSound server's

// instances becomes zero, Audio Server will start its shutdown routine.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::DecrementDevSoundCount()

	{

	iDevSoundCount--;

	if (iDevSoundCount == 0)

		{

		ASSERT(iDelayAudioServerShutDown);

		if (iDelayAudioServerShutDown)

			{

			iDelayAudioServerShutDown->SetDelay(TTimeIntervalMicroSeconds32(KAudioServerShutDownDelay));

			}

		}

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::SendEventToClient

// Sends Event to DevSound client.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::SendEventToClient(TInt aSessionToAlert, TInt /*aSessionToBeLaunched*/)

	{

	// For the session requested, send event to client

	iSessionIter.SetToFirst();

	CMMFAudioServerSession* session = static_cast<CMMFAudioServerSession*>(iSessionIter++);

	while (session)

		{

		if (session->AudioServerSessionId() == aSessionToAlert)

			{

			break;  // Finished

			}

		session = static_cast<CMMFAudioServerSession*>(iSessionIter++);

		}

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::LaunchRequest

// Launches the DevSound servers waiting for Audio Policy.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::LaunchRequest(TInt aSessionId)

	{

	iSessionIter.SetToFirst();

	CMMFAudioServerSession* session = static_cast<CMMFAudioServerSession*>(iSessionIter++);

	while (session)

		{

		if (session->AudioServerSessionId() == aSessionId)

			{

			break;  // Finished

			}

		session = static_cast<CMMFAudioServerSession*>(iSessionIter++);

		}

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::StartDevSoundServer

// Starts a new DevSound server instance.

// -----------------------------------------------------------------------------

//

TInt CMMFAudioServer::StartDevSoundServer(RMMFDevSoundServerProxy& aDevSoundSessionHandle) const

	{

	SYMBIAN_DEBPRN0(_L("CMMFAudioServer[0x%x]::StartDevSoundServer - enter"));

	RMessage2 message(Message());

	CStartAndMonitorDevSoundThread* monitorDevSound = NULL;

	TRAPD(err, monitorDevSound = CStartAndMonitorDevSoundThread::NewL(const_cast<CMMFAudioServer*>(this)));

	if(err != KErrNone)

		{

		delete monitorDevSound;

		return err;

		}

	err = iDevSoundServList.Append(monitorDevSound);

	if(err != KErrNone)

		{

		delete monitorDevSound;

		return err;

		}

	SYMBIAN_DEBPRN0(_L("CMMFAudioServer[0x%x]::StartDevSoundServer - exit"));

	return monitorDevSound->StartDevSoundServer(message, aDevSoundSessionHandle);

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CDelayAudioServerShutDown::NewL

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

CMMFAudioServer::CDelayAudioServerShutDown*

CMMFAudioServer::CDelayAudioServerShutDown::NewL()

	{

	CDelayAudioServerShutDown* self = new(ELeave) CDelayAudioServerShutDown;

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

// -----------------------------------------------------------------------------

// Constructor.

// -----------------------------------------------------------------------------

//

CMMFAudioServer::CDelayAudioServerShutDown::CDelayAudioServerShutDown()

	: CActive(0)

	{

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CDelayAudioServerShutDown::ConstructL

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::CDelayAudioServerShutDown::ConstructL()

	{

	User::LeaveIfError(iShutDownTimer.CreateLocal());

	CActiveScheduler::Add(this);

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CDelayAudioServerShutDown::~CDelayAudioServerShutDown

// -----------------------------------------------------------------------------

//

CMMFAudioServer::CDelayAudioServerShutDown::~CDelayAudioServerShutDown()

	{

	Cancel();

	iShutDownTimer.Close();

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CDelayAudioServerShutDown::SetDelay

// Request a timeout after aDelay

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::CDelayAudioServerShutDown::SetDelay(

	TTimeIntervalMicroSeconds32 aDelay)

	{

	__ASSERT_ALWAYS(!IsActive(), Panic(EMMFAudioServerIsActive));

	iShutDownTimer.After(iStatus, aDelay);

	SetActive();

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CDelayAudioServerShutDown::RunL

// Called by Active object framework when timer times out.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::CDelayAudioServerShutDown::RunL()

	{

	CActiveScheduler::Stop();

	}

// -----------------------------------------------------------------------------

// CMMFAudioServer::CDelayAudioServerShutDown::DoCancel

// Called by the Active object framework when user cancels active object.

// -----------------------------------------------------------------------------

//

void CMMFAudioServer::CDelayAudioServerShutDown::DoCancel()

	{

	iShutDownTimer.Cancel();

	}

// -----------------------------------------------------------------------------

// CStartAndMonitorDevSoundThread::NewL

// -----------------------------------------------------------------------------

//

CStartAndMonitorDevSoundThread* CStartAndMonitorDevSoundThread::NewL(

	CMMFAudioServer* aAudioServer)

	{

	CStartAndMonitorDevSoundThread* self = new(ELeave) CStartAndMonitorDevSoundThread(aAudioServer);

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

// -----------------------------------------------------------------------------

// CStartAndMonitorDevSoundThread::ConstructL

// -----------------------------------------------------------------------------

//

void CStartAndMonitorDevSoundThread::ConstructL()

	{

	CActiveScheduler::Add(this);

	}

// -----------------------------------------------------------------------------

// CStartAndMonitorDevSoundThread::StartDevSoundServer

// Starts a new DevSound server.

// -----------------------------------------------------------------------------

//

TInt CStartAndMonitorDevSoundThread::StartDevSoundServer(

	RMessage2& aMessage,

	RMMFDevSoundServerProxy& aDevSoundSessionHandle)

	{

	SYMBIAN_DEBPRN0(_L("CStartAndMonitorDevSoundThread[0x%x]::StartDevSoundServer - enter"));

	RThread clientThread;

	TInt err(KErrNone);

	// Open handle to client thread

	err = aMessage.Client(clientThread);

	if (err != KErrNone)

		{

		clientThread.Close();

		return err;

		}

	// Open a process-relative handle to the process which owns clientThread.

	RProcess clientProcess;

	err = clientThread.Process(clientProcess);

	if (err != KErrNone)

		{

		// Close client thread handle and return error

		clientThread.Close();

		return err;

		}

	// Get the client process id

	TProcessId clientProcessId(clientProcess.Id());

	// Close client thread and client process handles

	clientThread.Close();

	clientProcess.Close();

	RServer2 devSoundServerHandle;

	devSoundServerHandle.SetReturnedHandle(0);

	//Pass to DevSoundServer the clien't process ID

	TDevSoundServerStart start(iAudioServer,

								clientProcessId,

								devSoundServerHandle);

	TThreadFunction serverFunc=CMMFDevSoundServer::StartThread;

	// To deal with the unique thread (+semaphore!) naming in EPOC,

	// and that we may be trying to restart a server that has just

	// exited we attempt to create a unique thread name for the server.

#ifdef SYMBIAN_USE_SEPARATE_HEAPS

	err = iServer.Create(KNullDesC,serverFunc,KDevSoundServerStackSize*2,

						KDevSoundServerInitHeapSize,

						KDevSoundServerMaxHeapSize,

						&start,

						EOwnerProcess);

#else

	err = iServer.Create(KNullDesC,

						serverFunc,

						(KDevSoundServerStackSize*2),

						NULL,

						&start,

						EOwnerProcess);

#endif // SYMBIAN_USE_SEPARATE_HEAPS

	if(err != KErrNone)

		{

		return err;

		}

	iServer.SetPriority(KDevsoundSvrPriority);

	// Synchronise with the server

	TRequestStatus reqStatus;

	iServer.Rendezvous(reqStatus);

	if (reqStatus!=KRequestPending)

		{

		iServer.Kill(0);

		}

	else

		{

		// Start the test harness

		iServer.Resume();

		// Server will call the reciprocal static synchronise call

		}

	// note devSoundServerHandle really "owned" by client thread - just copied here

	User::WaitForRequest(reqStatus); // wait for start or death

	if(reqStatus.Int() != KErrNone)

		{

		// close our handle to the thread. If we reach here, the thread should have

		// closed anyway as continue Rendezvous is always KErrNone() 

		iServer.Close();

		return reqStatus.Int();

		}

	err = aDevSoundSessionHandle.Open(devSoundServerHandle);

	if(err != KErrNone)

		{

		// close our handle to the thread. If we reach here, this means that NewSessionL() failed

		// on server, and that action itself will asynchronously stop the thread

		iServer.Close();

		return err;

		}

	aDevSoundSessionHandle.ShareProtected();

	iServer.Logon(iStatus);

	SetActive();

	iAudioServer->IncrementDevSoundCount();

	SYMBIAN_DEBPRN0(_L("CStartAndMonitorDevSoundThread[0x%x]::StartDevSoundServer - exit"));

	return KErrNone;

	}

// -----------------------------------------------------------------------------

// CStartAndMonitorDevSoundThread::CStartAndMonitorDevSoundThread

// Constructor

// -----------------------------------------------------------------------------

//

CStartAndMonitorDevSoundThread::CStartAndMonitorDevSoundThread(

	CMMFAudioServer* aAudioServer)

	: CActive(EPriorityStandard),iAudioServer(aAudioServer)

	{

	}

// Desctructor

CStartAndMonitorDevSoundThread::~CStartAndMonitorDevSoundThread()