/*

* Copyright (c) 2008 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:   Interthread synchronization object

*

*/

#include <e32debug.h>

#include <coemain.h>

#include "alfstreamerbridge.h"

#include "alfstreamerserver.h"

#include "alfbridge.h"

#include "alflogger.h"

#ifdef ALF_DEBUG_TRACK_DRAWING

#include "alfcommanddebug.h"

#endif

// From MMP macro nowadays

//#define ALF_DRAW_FRAME_BEFORE_END_CALLBACK    

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

// constructor

// 

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

//

// The priority is EActivePriorityWsEvents+1 instead of CActive::EPriorityHigh to prevent a deadlock

// when AlfredServerThread calling iWsSession.GetEvent(event); from inside CCoeEnv::RunL() while

// wserv was waiting inside CWindowServer::CDefaultAnimationScheduler::DoRedrawNow for Alf to

// complete the TRequestStatus passed to CAlfRenderStage::End.

CAlfStreamerBridge::CAlfStreamerBridge(MAlfStreamerListener* aObserver):CActive(EActivePriorityWsEvents+1),iObserver(aObserver), iBatchObserver(0), iThread(RThread().Id())

    {

    CActiveScheduler::Add(this);       

    iStatus = KRequestPending;

    SetActive();

    TInt err = iQueueSema.CreateLocal();

    if (err)

        {

        // Device startup ends here.

        __ALFLOGSTRING("Stop the music, we are running without synchronization");

        User::Panic(_L("UI Accelerator"), 1);

        }

    }

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

// NewL

// 

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

// 

CAlfStreamerBridge* CAlfStreamerBridge::NewL( MAlfStreamerListener* aObserver )

    {

    CAlfStreamerBridge* self = new(ELeave)CAlfStreamerBridge( aObserver );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// ConstructL

// 

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

// 

void CAlfStreamerBridge::ConstructL()

    {

    iDataBuf.Create( KInitialVariableBufferSize );

    iDataBuf.SetLength(0);

    iStreamerServer = NULL;

#ifdef ALF_DEBUG_TRACK_DRAWING

    iCommandDebugger = CAlfCommandDebug::NewL();

#endif

    }

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

// destructor

// 

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

// 

CAlfStreamerBridge::~CAlfStreamerBridge()

    {

    iDataBuf.Close();

    iQueueSema.Close();

#ifdef ALF_DEBUG_TRACK_DRAWING

    delete iCommandDebugger;

#endif

    }

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

// SetBatchObserver

// 

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

// 

void CAlfStreamerBridge::SetBatchObserver(MAlfBatchObs* aBatchObserver)

    {

    iBatchObserver = aBatchObserver;

    }

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

// Activate

// 

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

// 

void CAlfStreamerBridge::Activate()

    {

    iStatus = KRequestPending;    

    SetActive();

    }

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

// Trigger

// 

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

// 

TInt CAlfStreamerBridge::Trigger(TInt aStatus)

    {

    TInt err = KErrNone;

    if (!iVarDataAddedButNotPosted)

        {

        iQueueSema.Wait();

        }

    iVarDataAddedButNotPosted = EFalse; // after this point, data may just be lost if posting fails    

    __ALFLOGSTRING2("CAlfStreamerBridge::Trigger status %d, own request status %d", aStatus, iStatus.Int() );

    if (IsActive() && iStatus == KRequestPending)

        {

        RThread t;

        TInt err = t.Open(iThread);

        if (err)

            {

            __ALFLOGSTRING1( "CAlfStreamerBridge::Trigger() ignore RThread::Open() error: %d", err );

            }

        TRequestStatus* status = &iStatus;

        __ALFLOGSTRING("CAlfStreamerBridge::Trigger - completing  CAlfStreamerBridge");

        t.RequestComplete(status, aStatus);

        t.Close();

        }

    else

        {

#ifdef _DEBUG

        if ( IsActive() )

            {

            __ALFLOGSTRING("CAlfStreamerBridge::Trigger - already active");

            }

        __ALFLOGSTRING("CAlfStreamerBridge::Trigger - appending data");

#endif        

        err = iQueue.Append(aStatus);

        }

    iQueueSema.Signal();

    __ALFLOGSTRING1("CAlfStreamerBridge::Trigger request status %d", iStatus.Int() );

    return err;

    }

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

// AddData

// 

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

// 

TInt CAlfStreamerBridge::AddData( TAlfDecoderServerBindings aOp,TInt aI1,TInt aI2 ,TAny* aPtr )

    {

    TInt err = KErrNotFound;

        {    

#ifdef ALF_DEBUG_TRACK_DRAWING    

        iCommandDebugger->SetDescription( aOp, R_ALF_BRIDGE_COMMAND_DESCRIPTION_ARRAY );

        __ALFLOGSTRING2("CAlfStreamerBridge::AddData op %S, iQueue.Length = %d", &iCommandDebugger->Text(), iQueue.Count());

#else

        __ALFLOGSTRING2("CAlfStreamerBridge::AddData op %d, iQueue.Length = %d", aOp, iQueue.Count());    

#endif

        err = KErrNone;

        for(TInt i = 0; i < iMessages.Count(); i++ )

            {

            if (iMessages[i].IsEmpty())

                {

                iMessages[i].Set(aOp,aI1,aI2,aPtr);

                err = Trigger(i);

                return err;

                }

            }

        // No existing (empty) cell was available for recycling, add new cell to array

        TAlfBridgerData data;

        data.Set(aOp,aI1,aI2,aPtr);

        err = iMessages.Append(data);

        }

   if (!err) 

        {

        err = Trigger(iMessages.Count()-1);

        }

    else if (iVarDataAddedButNotPosted)

        {

        iQueueSema.Signal();

        }

    return err;

    }

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

// GetData

// 

// Note, that this method frees the message entry for reuse.

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

// 

TAlfBridgerData CAlfStreamerBridge::GetData(TInt aIndex)

    {

    TAlfBridgerData data;

    ASSERT(aIndex <= iMessages.Count()-1);

    data = iMessages[aIndex];

    return data;    

    }

EXPORT_C TUid CAlfStreamerBridge::FindAppUidForWgId(TInt /*aWgId*/)

    {

    __ASSERT_DEBUG(EFalse, User::Leave(KErrNotSupported));

    return KNullUid;

    }        

EXPORT_C TInt CAlfStreamerBridge::FindWgForAppUid(TUid /*aAppUid*/)

    {

    __ASSERT_DEBUG(EFalse, User::Leave(KErrNotSupported));

    return 0;

    }        

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

// RunL

// 

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

// 

void CAlfStreamerBridge::RunL()

    {

    TInt operation = iMessages[iStatus.Int()].iOp;

#ifdef ALF_DEBUG_TRACK_DRAWING 

    iCommandDebugger->SetDescription( operation, R_ALF_BRIDGE_COMMAND_DESCRIPTION_ARRAY );

    __ALFLOGSTRING1("CAlfStreamerBridge::RunL: First op %S", &iCommandDebugger->Text() );

#else

    __ALFLOGSTRING1("CAlfStreamerBridge::RunL: First op %d", operation);

#endif

    switch ( operation )

        {

        case EAlfRequestCommitBatch:

#ifdef ALF_DRAW_FRAME_BEFORE_END_CALLBACK    

            {

            CAlfBridge* bridge = dynamic_cast<CAlfBridge*>(iObserver);

            if (bridge)

                {

                bridge->RefreshNow(iMessages[iStatus.Int()].iInt2);

                }

            } // fall through

#endif

        case EAlfRequestCommandReadNotification:

        case EAlfReleaseTemporaryChunk:

            {

            if (iBatchObserver)

                {

                iBatchObserver->BridgerCallback( operation, iMessages[iStatus.Int()].iInt1 );

                }

            iMessages[iStatus.Int()].ResetEntry();

            break;

            }

        default:

            {

            // Handle command

            __ALFLOGSTRING("CAlfStreamerBridge:: calling observer callback");

            __ASSERT_ALWAYS(iObserver, User::Invariant());

            iObserver->HandleCallback(iStatus.Int());

            // For "getters" also call back to Alf decoder thread

            if ((operation > EAlfDSGetCommandsStart) && (operation < EAlfDSGetCommandsEnd))

            	{

            	if (iBatchObserver)

                	{

                	iBatchObserver->BridgerCallback( operation, iMessages[iStatus.Int()].iInt1 );

                	}

            	}

    		iMessages[iStatus.Int()].ResetEntry(); // mark the cell free

            }

        }

    // Todo: is this kind of burst mode ok, it should be..

    iQueueSema.Wait();

    while (iQueue.Count())

        {

    	TInt operation2 = iMessages[iQueue[0]].iOp;

#ifdef ALF_DEBUG_TRACK_DRAWING 

    iCommandDebugger->SetDescription( operation2, R_ALF_BRIDGE_COMMAND_DESCRIPTION_ARRAY );

    __ALFLOGSTRING1("CAlfStreamerBridge:: Queue op %S", &iCommandDebugger->Text() );

#else

    __ALFLOGSTRING1("CAlfStreamerBridge:: Queue op %d", operation2 );

#endif

    switch ( operation2 )

            {

            case EAlfRequestCommitBatch:

#ifdef ALF_DRAW_FRAME_BEFORE_END_CALLBACK    

            {

            CAlfBridge* bridge = dynamic_cast<CAlfBridge*>(iObserver);

            if (bridge)

                {

                bridge->RefreshNow(iMessages[iQueue[0]].iInt2);

                }

            } // fall through

#endif

            case EAlfRequestCommandReadNotification:

            case EAlfReleaseTemporaryChunk:

                {

                if (iBatchObserver)

                    {

                    __ALFLOGSTRING("CAlfStreamerBridge:: calling BATCH observer callback");

                    iBatchObserver->BridgerCallback( operation2, iMessages[iQueue[0]].iInt1 );

                    }

                iMessages[iQueue[0]].ResetEntry();

                break;

                }

            default:

                {

	            // Handle command

                __ALFLOGSTRING("CAlfStreamerBridge:: calling observer callback");

                __ASSERT_ALWAYS(iObserver, User::Invariant());

	            iObserver->HandleCallback(iQueue[0]);

	            // For "getters" also call back to Alf decoder thread

	            if ((operation2 > EAlfDSGetCommandsStart) && (operation2 < EAlfDSGetCommandsEnd))

	            	{

	            	if (iBatchObserver)

	                	{

	                	iBatchObserver->BridgerCallback( operation2, iMessages[iQueue[0]].iInt1 );

	                	}

	            	}

	    		iMessages[iQueue[0]].ResetEntry(); // mark the cell free

                }

            }

        iQueue.Remove(0);

        }

    if ( !iItemsInBuffer )

        {

        iDataBuf.SetLength(0);

        }

    __ALFLOGSTRING1("CAlfStreamerBridge::RunL - activating", iItemsInBuffer);

    Activate();

    iQueueSema.Signal();

    __ALFLOGSTRING1("CAlfStreamerBridge::RunL - really really ending", iItemsInBuffer);

    }

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

// DoCancel

// 

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

// 

void CAlfStreamerBridge::DoCancel()

    {

    if (iBatchObserver)

        {

        iBatchObserver->BridgerCanceled();

        }

    }

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

// StartNewBlock

// 

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

// 

void CAlfStreamerBridge::StartNewBlock(TBool aCompositionModified)

    {

    // Queue marker. Basically we could use one new member to assert that there can

    // be only one marker

    //__ALFLOGSTRING1("CAlfStreamerBridge:: Request command read notification, swap active: %d", iSwapActive );    

    AddData(EAlfRequestCommitBatch,0,aCompositionModified,0);

    }

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

// RequestCommandReadNotification

// 

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

// 

void CAlfStreamerBridge::RequestCommandReadNotification( TInt aLastReadOffset, TAlfDecoderServerBindings aCommand )

    {

    AddData( aCommand, aLastReadOffset, 0, 0);

    }

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

// AppendVarDataL

// 

// Note, that memory allocation is done only if current buffer is not large enough 

// to add an item.

// TODO: The buffers added are not the buffer in optimal way.

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

// 

EXPORT_C const TAny* CAlfStreamerBridge::AppendVarDataL( TInt aSize, TInt& aIndex )

    {

    iQueueSema.Wait();

    // Make sure the length of the allocated data is always divisible by 8

    if ( aSize % 8 != 0 )

        {

        __ALFLOGSTRING1("CAlfStreamerBridge::AppendVarDataL, size not multiple of 8: %d", aSize );  

        aSize = aSize + ( 8 - aSize % 8 );

        }

    if ( iDataBuf.Length() + aSize >= iDataBuf.MaxLength() )

        {

        if ( err )

            {

            __ALFLOGSTRING("CAlfStreamerBridge::AppendVarDataL, realloc failed");

		    iQueueSema.Signal();

            return NULL;

            }

        __ALFLOGSTRING1("CAlfStreamerBridge::AppendVarDataL, new max size: %d", iDataBuf.MaxLength() );  

        }

    aIndex = iDataBuf.Length();

    iDataBuf.SetLength( iDataBuf.Length() + aSize);

    iItemsInBuffer++;

    __ALFLOGSTRING1("CAlfStreamerBridge::AppendVarDataL: buflength %d", iDataBuf.Length());  

    iVarDataAddedButNotPosted = ETrue;    

    return iDataBuf.MidTPtr( aIndex ).Ptr();

    }

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

// GetVarDataL

// 

// Note, that data is not removed at any point. However it should not be accessed again 

// with this method, because that would confuse iItemsInBuffer counter.

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

// 

const TAny* CAlfStreamerBridge::GetVarDataL( TInt aIndex )

    {

    ASSERT( aIndex >= 0 && aIndex < iDataBuf.MaxLength() );

    ASSERT( iItemsInBuffer );

    iItemsInBuffer--;

    return iDataBuf.MidTPtr( aIndex ).Ptr();

    }

EXPORT_C const TAny* CAlfStreamerBridge::AppendEffectsDataL( TInt aSize, TInt& aIndex )

    {

	return AppendVarDataL( aSize, aIndex );

    }

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

// GetVarDataL

// 

// Note, that data is not removed at any point. However it should not be accessed again 

// with this method, because that would confuse iItemsInBuffer counter.

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

// 

const TAny* CAlfStreamerBridge::GetEffectsDataL( TInt aIndex )

    {

    return GetVarDataL(aIndex);

    }