/*

* Copyright (c) 2002-2007 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:  Streams data from Java to controller

*

*/

//  INCLUDE FILES

#include <AudioPreference.h>

#include <logger.h>

#include "cmmastreamhandler.h"

#include "cmmadatasourcestream.h"

#include "mmafunctionserver.h"

CMMAStreamHandler* CMMAStreamHandler::NewL(

    MMMAStreamHandlerListener& aListener,

    MStreamControl& aMStreamControl,

    MDataBufferSource& aMDataBufferSource,

    CMultimediaFactory& aFactory,

    CMetaDataUtility& aMetaDataUtility)

{

    CMMAStreamHandler* self = new(ELeave) CMMAStreamHandler(aListener,

            aMStreamControl,

            aMDataBufferSource,

            aFactory,

            aMetaDataUtility);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

}

CMMAStreamHandler::~CMMAStreamHandler()

{

    iMDataBufferSource.RemoveObserver(*this);

    if (iBuffer != NULL)

    {

        iFactory.DeleteDataBuffer(iBuffer);

        iBuffer = NULL;

    }

    iRequests.ResetAndDestroy();

}

CMMAStreamHandler::CMMAStreamHandler(MMMAStreamHandlerListener& aListener,

                                     MStreamControl& aMStreamControl,

                                     MDataBufferSource& aMDataBufferSource,

                                     CMultimediaFactory& aFactory,

                                     CMetaDataUtility& aMetaDataUtility)

        :iMStreamControl(aMStreamControl),

        iMDataBufferSource(aMDataBufferSource),

        iFactory(aFactory),

        iListener(aListener),

        iMetaDataUtility(aMetaDataUtility),

        // to be removed once MDU supports all the reqd formats

        iMimeTypeSupportedByMDU(ETrue)

{

    // ignore read/write completed before stream is prepared

    iState = EMMAStreamPaused;

    iMetaDataReadyToBeParsed = EFalse;

}

void CMMAStreamHandler::ConstructL()

{

    //Register source control to control observer to get the event

    iMDataBufferSource.AddObserver(*this);

    iLastBufferWritten = EFalse;

    iBuffer = NULL; // initialize MDataBuffer type pointer

    // create requests

    for (TInt i = 0; i < KMMAStreamHandlerBufferCount; i++)

    {

        CMMAStreamRequest* requestToAppend = CMMAStreamRequest::NewLC(this);

        iRequests.AppendL(requestToAppend);

        CleanupStack::Pop(requestToAppend);

    }

}

void CMMAStreamHandler::Prepare(const TDesC8& aMimeType)

{

    iState = EMMAStreamPrepare;

    // initialize MetaDataUtility

    TInt error = iMetaDataUtility.InitChunkData(aMimeType, *this);

    if (error != KErrNone)

    {

        if (error == KErrArgument)

        {

            // MDU doesn't support aMimeType

            // can be removed once MDU supports all the reqd formats

            iMimeTypeSupportedByMDU = EFalse;

        }

        else

        {

            // MDU supports but some other error occured

            iListener.PrepareComplete(error);

            return;

        }

    }

    else

    {

        // to be removed once MDU supports all the reqd formats

        iMimeTypeSupportedByMDU = ETrue;

    }

    //reset request data for reading again from beginning

    iRequests[0]->DataPtr().SetLength(0);

    // when read completes iListerner.PrepareComplete will be called

    iSourceStream->Read(iRequests[ 0 ]);

}

void CMMAStreamHandler::Start()

{

    iState = EMMAStreamStart;

    if (iSourceStream->Request())

        iState = EMMAStreamStarted;

        iListener.StartComplete(KErrNone);

        return;

    }

    TInt count = iRequests.Count();

    TBool started = EFalse;

    for (TInt i = 0; i < count && !started; i++)

    {

        CMMAStreamRequest* r = iRequests[ i ];

        if (!r->IsActive() && r->DataPtr().Length() > 0)

        {

            // data was not yet written to server

            WriteRequest(r);

            started = ETrue;

        }

        else if (r->IsActive())  // data is in server

        {

            // atleast one request is not processed

            started = ETrue;

        }

    }

    if (started)  // If allready started complete start

    {

        iListener.StartComplete(KErrNone);

        iState = EMMAStreamStarted;

    }

    else

    {

        // Need to read data before start

        iSourceStream->Read(iRequests[ 0 ]);

    }

}

void CMMAStreamHandler::Pause()

{

    // ignore read/write completes

    iState = EMMAStreamPaused;

}

void CMMAStreamHandler::SetSourceStream(CMMADataSourceStream* aSourceStream)

{

    iSourceStream = aSourceStream;

}

void CMMAStreamHandler::WriteComplete(CMMAStreamRequest* aRequest)

{

    if (iState == EMMAStreamStarted)

    {

        if (aRequest->RequestBuffer()() == 1)

        {

            iState = EMMAStreamEof;

        }

        else

        {

            iSourceStream->Read(aRequest);

        }

    }

    // else, all other states ignore write complete

}

void CMMAStreamHandler::ReadComplete(CMMAStreamRequest* aRequest)

{

    if (iState == EMMAStreamPrepare)

    {

        WriteRequest(aRequest);

        iListener.PrepareComplete(KErrNone);

        iState = EMMAStreamPaused;

    }

    else if (iState == EMMAStreamStart)

    {

        iState = EMMAStreamStarted;

        // write first request to server

        WriteRequest(aRequest);

        iListener.StartComplete(KErrNone);

    }

    else if (iState == EMMAStreamStarted)

    {

        WriteRequest(aRequest);

    }

    // else, all other states ignore read complete

}

void CMMAStreamHandler::HandleError(CMMAStreamRequest* /*aRequest*/,

                                    TInt aError)

{

    if (iState == EMMAStreamPrepare)

    {

        iListener.PrepareComplete(aError);

        iState = EMMAStreamPaused;

    }

    else if (iState == EMMAStreamStart)

    {

        iListener.StartComplete(aError);

        iState = EMMAStreamStarted;

    }

    else

    {

        iListener.HandleError(aError);

    }

}

void CMMAStreamHandler::WriteRequest(CMMAStreamRequest* aRequest)

{

    iCurrentRequest = aRequest; //initialize the current StreamRequest for use in callback function

    iProcessedState = EMMANoneProcessed;

    TInt state = iMStreamControl.GetState();

    if (!aRequest->IsActive())

    {

        aRequest->SetActive(ETrue);

    }

    //Create MDataBuffer and then pass it as a parameter of WriteData

    if (iBuffer != NULL)

    {

        iFactory.DeleteDataBuffer(iBuffer);

        iBuffer= NULL;

    }

    iFactory.CreateDataBuffer(KDataBufferSourceControl, KMMAStreamRequestBufferSize, iBuffer);

    iBuffer->GetBufferPtr().Set(aRequest->DataPtr());

    if (aRequest->RequestBuffer()() == 1)  //set that it is the last buffer

    {

        iState = EMMAStreamEof;

        iBuffer->SetLastBuffer(ETrue);

        iLastBufferWritten = ETrue;

    }

    else

    {

        iBuffer->SetLastBuffer(EFalse);

        iLastBufferWritten = EFalse;

    }

    // When the buffer is processed by framework KBufferProcessedEvent

    // will be delivered to registered observers

    TInt err = iMDataBufferSource.WriteData(*iBuffer);

    // to be removed once MDU supports all the reqd formats

    if (iMimeTypeSupportedByMDU && !iMetaDataReadyToBeParsed)

    {

        err = iMetaDataUtility.ProcessChunkData(aRequest->DataPtr(), iLastBufferWritten);

    }

}

void CMMAStreamHandler::Event(MControl* /*aControl*/, TUint aEventType, TAny* aEventObject)

{

    switch (aEventType)

    {

    case MSourceControlObserver::KBufferProcessedEvent:

    {

        MBufferProcessedEvent* evt = (MBufferProcessedEvent*)aEventObject;

        // can be removed once MDU supports all the reqd formats

        if (!iMimeTypeSupportedByMDU ||

                (iProcessedState == EMMAMetaDataProcessed || iMetaDataReadyToBeParsed))

        {

            iCurrentRequest->WriteRequestComplete(evt->GetErrorCode());

            iCurrentRequest->SetActive(EFalse);

            iProcessedState = EMMABothProcessed;

        }

        else

        {

            iProcessedState = EMMABufferProcessed;

        }

    }

    break;

    case MSourceControlObserver::KBitRateChangedEvent:

    {

    }

    break;

    case MStreamControlObserver::KDurationChangedEvent:

    {

    }

    break;

    default:

        break;

    };

}

void CMMAStreamHandler::HandleChunkDataProcessed(TInt aError)

{

    if (iProcessedState == EMMABufferProcessed)

    {

        iCurrentRequest->WriteRequestComplete(aError);

        iCurrentRequest->SetActive(EFalse);

        iProcessedState = EMMABothProcessed;

    }

    else

    {

        iProcessedState = EMMAMetaDataProcessed;

    }

}

void CMMAStreamHandler::HandleChunkDataReadyToBeParsed()

{

    iMetaDataReadyToBeParsed = ETrue;

    TInt error = iMetaDataUtility.ParseChunkData();

}

void CMMAStreamHandler::HandleChunkDataComplete(TInt aError)

{

    if (KErrNone != aError)

    {

        iListener.HandleError(aError);

    }

}

TBool CMMAStreamHandler::LastBufferWritten()

{

    return iLastBufferWritten;

}

void CMMAStreamHandler::Stop()

{

    // forcefully complete all requests

    // and release already read data.

    Pause();

    iMetaDataUtility.CloseChunkData();

    TInt count = iRequests.Count();

    for (TInt i = 0; i < count; i++)

    {

        CMMAStreamRequest* r = iRequests[ i ];

        r->WriteRequestComplete(KErrNone);

        r->SetActive(EFalse);

    }

}

//  END OF FILE