--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmswadaptation/videorenderer/src/buffermanager.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,275 @@
+// Copyright (c) 2007-2009 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:
+//
+
+/**
+ @file
+ @internalComponent
+*/
+
+#include <mmf/devvideo/devvideobase.h>
+#include "buffermanager.h"
+#include "videoframebuffer.h"
+#include "rendererutil.h"
+
+/** Constructor for performing 1st stage construction */
+CRendererBufferManager::CRendererBufferManager(const RChunk& aChunk, TBool aTimed)
+: iChunk(aChunk),
+  iTimed(aTimed),
+  iAvailBuffers(TVideoFrameBuffer::iOffset), 
+  iWaitingBuffers(TVideoFrameBuffer::iOffset), 
+  iWaitingBuffersIter(iWaitingBuffers)
+	{}
+
+/** Destructor.	*/
+CRendererBufferManager::~CRendererBufferManager()
+	{
+	if (iTimed)
+		{
+		iMutex.Close();
+		}
+	iAvailBuffers.Reset();
+	iWaitingBuffers.Reset();
+	iBuffers.ResetAndDestroy();
+	iChunk.Close();
+	}
+
+/** Two-phased constructor. */
+CRendererBufferManager* CRendererBufferManager::NewL(const RSurfaceManager::TSurfaceInfoV01& aSurfaceInfo, const RArray<TInt>& aBufferOffsets, const RChunk& aChunk, TBool aTimed)
+	{
+	CRendererBufferManager* self = new (ELeave) CRendererBufferManager(aChunk, aTimed);
+	CleanupStack::PushL(self);
+	self->ConstructL(aSurfaceInfo, aBufferOffsets);
+	CleanupStack::Pop(); // self;
+	return self;
+	}
+
+/** Constructor for performing 2nd stage construction */
+void CRendererBufferManager::ConstructL(const RSurfaceManager::TSurfaceInfoV01& aSurfaceInfo, const RArray<TInt>& aBufferOffsets)
+	{
+	if (iTimed)
+		{
+		User::LeaveIfError(iMutex.CreateLocal());
+		}
+	
+	TUncompressedVideoFormat format = VideoRendererUtil::ConvertUidPixelFormatToUncompressedVideoFormatL(aSurfaceInfo.iPixelFormat);
+	
+	TVideoFrameBuffer* buffer = NULL;
+	for (TInt i = 0; i < aSurfaceInfo.iBuffers; ++i)
+		{
+		buffer = new (ELeave) TVideoFrameBuffer(format, aSurfaceInfo.iStride, i, iChunk, aBufferOffsets[i]);
+		buffer->SetBufferStatus(TVideoFrameBuffer::EAvailable);
+		CleanupStack::PushL(buffer);
+		iBuffers.AppendL(buffer);
+		CleanupStack::Pop(buffer);
+		
+		iAvailBuffers.AddLast(*buffer);
+		}
+	}
+
+/** Lock buffer table on timed mode */
+void CRendererBufferManager::Lock()
+	{
+	if (iTimed)
+		{
+		iMutex.Wait();
+		}
+	}
+
+/** Unlock buffer table on timed mode */
+void CRendererBufferManager::Unlock()
+	{
+	if (iTimed)
+		{
+		iMutex.Signal();
+		}
+	}
+
+/** Get the next available buffer */
+TVideoFrameBuffer* CRendererBufferManager::NextBuffer()
+	{
+	Lock();
+	
+	TVideoFrameBuffer* buffer = NULL;
+	if (!iAvailBuffers.IsEmpty())
+		{
+		buffer = iAvailBuffers.First();
+		
+		__ASSERT_DEBUG(buffer->BufferStatus() == TVideoFrameBuffer::EAvailable,
+				User::Panic(_L("CRBM::NextBuffer"), KErrCorrupt));
+		buffer->SetBufferStatus(TVideoFrameBuffer::EUsedByClient);
+		buffer->DblQueLink().Deque();
+		}
+
+	Unlock();
+	return buffer;
+	}
+
+/** Check if a buffer was previously sent to client */
+TBool CRendererBufferManager::BufferUsedByClient(TVideoFrameBuffer* aBuffer)
+	{
+	TVideoFrameBuffer* buffer = iBuffers[aBuffer->BufferId()];
+	if (buffer->BufferStatus() == TVideoFrameBuffer::EUsedByClient && aBuffer == buffer)
+		{
+		return ETrue;
+		}
+	return EFalse;
+	}
+
+/** Release the buffer for reuse */
+TBool CRendererBufferManager::ReleaseBuffer(TVideoFrameBuffer* aBuffer)
+	{
+	TBool released = EFalse;
+	Lock();
+	
+	if (BufferUsedByClient(aBuffer))
+		{
+		// release the buffer if it was previously sent to client
+		aBuffer->SetBufferStatus(TVideoFrameBuffer::EAvailable);
+		iAvailBuffers.AddLast(*aBuffer);		
+		released = ETrue;
+		}
+
+	Unlock();
+	return released;
+	}
+
+/** Received notification that buffer become available */
+void CRendererBufferManager::BufferAvailable(TInt aBufferId)
+	{
+	Lock();
+
+	TVideoFrameBuffer* buffer = iBuffers[aBufferId];
+
+	__ASSERT_DEBUG(buffer->BufferStatus() == TVideoFrameBuffer::EWaiting || buffer->BufferStatus() == TVideoFrameBuffer::ESubmitted,
+			User::Panic(_L("CRBM::BufferAvailable"), KErrCorrupt));
+
+	buffer->SetBufferStatus(TVideoFrameBuffer::EAvailable);
+	buffer->DblQueLink().Deque();
+	iAvailBuffers.AddLast(*buffer);
+	
+	Unlock();
+	}
+
+/** Get the next waiting buffer to submit
+ @param aRemoveFromList If true, mark the buffer as submitted and deque from waiting list
+ @param aIsLast ETrue on result if the returned buffer is the last buffer in waiting list
+ */
+TVideoFrameBuffer* CRendererBufferManager::WaitingBuffer(TBool aRemoveFromList, TBool& aIsLast)
+	{
+	Lock();
+	
+	TVideoFrameBuffer* buf = NULL;
+	if (iWaitingBuffers.IsEmpty() == EFalse)
+		{
+		buf = iWaitingBuffers.First();
+
+		__ASSERT_DEBUG(buf->BufferStatus() == TVideoFrameBuffer::EWaiting,
+				User::Panic(_L("CRBM::WaitingBuffer"), KErrCorrupt));
+		aIsLast = iWaitingBuffers.IsLast(buf);
+
+		if (aRemoveFromList)
+			{
+			buf->SetBufferStatus(TVideoFrameBuffer::ESubmitted);
+			buf->DblQueLink().Deque();
+			}
+		}
+
+	Unlock();
+	return buf;
+	}
+
+/** Mark the buffer as submitted and deque from waiting list */
+void CRendererBufferManager::BufferSubmitted(TVideoFrameBuffer* aBuffer)
+	{
+	Lock();
+
+	__ASSERT_DEBUG(aBuffer->BufferStatus() == TVideoFrameBuffer::EWaiting,
+			User::Panic(_L("CRBM::BufferSubmitted"), KErrArgument));
+
+	aBuffer->SetBufferStatus(TVideoFrameBuffer::ESubmitted);
+	aBuffer->DblQueLink().Deque();
+
+	Unlock();
+	}
+
+/** Return ETrue if the waiting list is empty */
+TBool CRendererBufferManager::WaitingListIsEmpty()
+	{
+	Lock();
+	
+	TBool ret = iWaitingBuffers.IsEmpty();
+	
+	Unlock();
+	return ret;
+	}
+
+/** 
+Mark a buffer as waiting for update and add to waiting list, return ETrue 
+if rescheduled is needed (i.e. head of waiting list has changed and the list wasn't empty) */
+TBool CRendererBufferManager::UpdateBuffer(TVideoFrameBuffer* aBuffer, const TTime& aTime)
+	{
+	Lock();
+	
+	TBool headChanged = EFalse;
+	if (BufferUsedByClient(aBuffer))
+		{
+		aBuffer->SetBufferStatus(TVideoFrameBuffer::EWaiting);
+		aBuffer->SetPresentationTime(aTime);
+		
+		// add buffer to waiting buffer list according to presentation time
+		if (iWaitingBuffers.IsEmpty())
+			{
+			iWaitingBuffers.AddLast(*aBuffer);
+			}
+		else
+			{
+			TVideoFrameBuffer* buf = iWaitingBuffers.Last();
+			if (aTime >= buf->PresentationTime())
+				{
+				iWaitingBuffers.AddLast(*aBuffer);
+				}
+			else
+				{
+				// client tried to insert a older frame, search for the right position to insert
+				iWaitingBuffersIter.SetToFirst();
+				while ((buf = iWaitingBuffersIter++) != NULL)
+					{
+					if (aTime < buf->PresentationTime())
+						{
+						// Found the slot
+						if (iWaitingBuffers.IsFirst(buf))
+							{
+							iWaitingBuffers.AddFirst(*aBuffer);
+							headChanged = ETrue;
+							}
+						else
+							{
+							aBuffer->DblQueLink().AddBefore(&(buf->DblQueLink()));
+							}
+						}
+					}
+				}
+			}
+		}
+	else
+		{
+		DEBUGPRINT1(_L("CRendererBufferManager::UpdateBuffer receive buffer not usable by client"));
+		__ASSERT_DEBUG(EFalse, User::Panic(_L("CRBM::UpdateBuf"), KErrBadHandle));
+		}
+	
+	Unlock();
+	
+	return headChanged;
+	}