// Copyright (c) 2004-2009 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 <f32file.h>

#include <e32math.h>

#include <s32mem.h>

#include "MmfAudioServerProxy.h"

#include "MmfAudioServerStart.h"

#include "MmfBase.hrh"

#include "MmfAudioClientServer.h"

#define KMaxServerNameLength 256

static const TUid KUidAudioServer = {KUidMmfAudioServerDllUnicodeDefine};

const TInt KRetries = 5; 

const TInt KInitialTime = 100000;  //100ms

const TInt KTimeIncrement = 50000; // 50ms 

EXPORT_C TInt RMMFAudioServerProxy::Open()

	{

	const TUidType serverUid(KNullUid,KNullUid,KUidAudioServer);

	// Assume the server is already running and attempt to create a session

	// 4 message slots

	TInt err = CreateSession(KAudioServerName, TVersion(KMMFAudioServerVersion,

														KMMFAudioServerMinorVersionNumber,

														KMMFAudioServerBuildVersionNumber));

	if(err == KErrNotFound)

		{

		// Server not running

		// Construct the server binary name

		TBuf<KMaxServerNameLength> serverFile;

		RProcess server;

		_LIT(KEmpty,"");

		err = server.Create(KAudioServerFileName, KEmpty, serverUid);

		if(err != KErrNone)

			return err;

		// Synchronise with the server

		TRequestStatus reqStatus;

		server.Rendezvous(reqStatus);

		if (reqStatus!=KRequestPending)

			{

			server.Kill(0);

			}

		else

			{

			// Start the test harness

			server.Resume();

			// Server will call the reciprocal static synchronise call

			}

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

		server.Close();

		TInt reqStatusValue = reqStatus.Int();

		if(reqStatusValue != KErrNone)

			{

			if(reqStatusValue == KErrNoMemory || reqStatusValue == KErrNotFound)

				{

				// All error codes except KErrNoMemory and KErrNotFound are assumed

				// to be a duplicate server instance dying, then keep trying connection

				// to the server. This can happen when two servers attempt to start

				// at the same time.

				return reqStatusValue;

				}

			//Wait for sometime, then retry and creation session

			TInt waitTime = KInitialTime;

			for(TInt retries=0;retries<KRetries;retries++)

				{

				User::After(waitTime);

				waitTime+=KTimeIncrement;

				err = CreateSession(KAudioServerName, TVersion(KMMFAudioServerVersion,

														KMMFAudioServerMinorVersionNumber,

														KMMFAudioServerBuildVersionNumber));

				if(err==KErrNone)

					{

					//Session created successfully

					break;

					}	

				}			

			}

		else

			{

			//Create the root server session

			err = CreateSession(KAudioServerName, TVersion(KMMFAudioServerVersion,

														KMMFAudioServerMinorVersionNumber,

														KMMFAudioServerBuildVersionNumber));	

			}

		}

	return err;		

	}

EXPORT_C TInt RMMFAudioServerProxy::SetDevSoundInfo()

	{

	return SendReceive(EMMFAudioLaunchRequests);

	}

EXPORT_C TInt RMMFAudioServerProxy::GetDevSoundSessionHandle()

	{

	return SendReceive(EMMFDevSoundSessionHandle);

	}