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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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/**
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@file
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@internalComponent
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*/
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#include "mmcameraclientinterface.h"
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#include <e32uid.h>
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/**
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* Starts the server process.
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*
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* Simultaneous launching of two such processes should be detected when the second
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* one attempts to create the server object, failing with KErrAlreadyExists.
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*/
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static TInt StartServer()
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{
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const TUidType serverUid(KNullUid, KExecutableImageUid, KECamServerUid3);
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RProcess server;
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TInt err = server.Create(KMMCameraServerExe, KNullDesC, serverUid);
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if (err != KErrNone)
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{
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return err;
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}
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TRequestStatus stat;
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server.Rendezvous(stat);
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if (stat != KRequestPending)
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{
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server.Kill(0); // abort startup
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}
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else
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{
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server.Resume(); // logon OK - start the server
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}
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User::WaitForRequest(stat); // wait for start or death
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// we can't use the 'exit reason' if the server panicked as this
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// is the panic 'reason' and may be '0' which cannot be distinguished
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// from KErrNone
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err = (server.ExitType() == EExitPanic) ? KErrGeneral : stat.Int();
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server.Close();
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return err;
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}
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/**
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* Connect to the server.
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*
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* Will attempt to start the server if it has not yet been started or has been shut down.
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*/
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TInt RMMCameraSession::Connect()
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{
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TInt serverStartRetries = 2;
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for (;;)
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{
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// Attempt to create a session to the server
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TInt err = CreateSession(KMMCameraServerName, TVersion(0, 0, 0), KECamNumAsynchMsg);
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if (err != KErrNotFound && err != KErrServerTerminated)
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{
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return err;
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}
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if (--serverStartRetries == 0)
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{
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return err;
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}
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// Server not found or shut down so (re)start the server
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err = StartServer();
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if (err != KErrNone && err != KErrAlreadyExists)
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{
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return err;
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}
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}
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}
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//
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// Synchronous interface APIs
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//
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TInt RMMCameraSession::SendMessage(TECamMsgId aMsgId, TCameraParameterId aParameterId, TDes8& aMessage)
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{
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if (aMessage.Length() > KECamMaxMessage)
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{
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return KErrArgument;
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}
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return SendReceive(aMsgId, TIpcArgs(aParameterId, &aMessage));
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}
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TInt RMMCameraSession::SendMessage(TECamMsgId aMsgId, TCameraParameterId aParameterId, TInt aMessage)
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{
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return SendReceive(aMsgId, TIpcArgs(aParameterId, aMessage));
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}
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TInt RMMCameraSession::SendMessage(TECamMsgId aMsgId, TDes8& aMessage)
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{
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if (aMessage.Length() > KECamMaxMessage)
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{
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return KErrArgument;
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}
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return SendReceive(aMsgId, TIpcArgs(&aMessage));
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}
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TInt RMMCameraSession::SendMessage(TECamMsgId aMsgId, TInt aMessage)
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{
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return SendReceive(aMsgId, TIpcArgs(aMessage));
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}
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TInt RMMCameraSession::SendMessage(TECamMsgId aMsgId)
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{
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return SendReceive(aMsgId);
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}
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TInt RMMCameraSession::SendRxMessage(TECamMsgId aMsgId, TCameraParameterId aParameterId, TDes8& aMessage) const
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{
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if (aMessage.Length() > KECamMaxMessage)
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{
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return KErrArgument;
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}
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return SendReceive(aMsgId, TIpcArgs(aParameterId, &aMessage));
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}
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TInt RMMCameraSession::SendRxMessage(TECamMsgId aMsgId, TCameraParameterId aParameterId, TInt aMessage) const
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{
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return SendReceive(aMsgId, TIpcArgs(aParameterId, aMessage));
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}
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TInt RMMCameraSession::SendRxMessage(TECamMsgId aMsgId, TDes8& aMessage) const
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{
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if (aMessage.Length() > KECamMaxMessage)
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{
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return KErrArgument;
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}
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return SendReceive(aMsgId, TIpcArgs(&aMessage));
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}
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//
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// Asynchronous interface APIs
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//
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TInt RMMCameraSession::ReceiveMessage(TECamMsgId aMsgId, TDes8& aMessage, TRequestStatus& aStatus)
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{
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if (aMessage.Length() > KECamMaxMessage)
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{
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return KErrArgument;
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}
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SendReceive(aMsgId, TIpcArgs(&aMessage), aStatus);
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return KErrNone;
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}
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void RMMCameraSession::ReceiveMessage(TECamMsgId aMsgId, TInt aMessage, TRequestStatus& aStatus)
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{
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SendReceive(aMsgId, TIpcArgs(aMessage), aStatus);
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}
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