// Copyright (c) 2006-2009 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:

//

#ifndef MDFVIDEODECODERBUFFERMANAGER_H

#define MDFVIDEODECODERBUFFERMANAGER_H

#include <e32base.h>

#include <mmf/devvideo/videoplayhwdevice.h>

#include <mmf/devvideo/devvideoplay.h>

#include <mmf/server/mmfdatabuffer.h>

/**

*/

class CVideoDataBuffer : public CBase

	{

public:

	static CVideoDataBuffer* NewL(TUint aSize);

	static CVideoDataBuffer* NewL(CMMFBuffer* aBuffer);

	operator CMMFBuffer*();

	operator TVideoInputBuffer&();

	TBool operator ==(const CMMFBuffer* aBuffer) const;

	TBool operator ==(const TVideoInputBuffer& aVideoInputBuffer) const;

	TUint Length();

	~CVideoDataBuffer();

private:

	CVideoDataBuffer();

	void ConstructL(TUint aSize);

	void ConstructL(CMMFBuffer* aBuffer);

private:

	TUint iSize;

	CMMFBuffer* iMmfBuffer;

	TVideoInputBuffer iVideoInputBuffer;	

	};

/**

*/	

class CVideoFrameBuffer : public CBase

	{

public:

	enum TFrameBufferState

		{

		EEmptied,

		EFilled

		};

public:

	static CVideoFrameBuffer* NewL(TSize aFrameSize, TUncompressedVideoFormat aVideoFormat, TDisplayMode aDisplayMode);

	operator CMMFBuffer&();

	operator CMMFBuffer*();

	operator TVideoPicture&();

	operator TVideoPicture*();

	TBool operator ==(const CMMFBuffer* aBuffer) const;

	TBool operator ==(const TVideoPicture& aVideoPicture) const;

	void LockFrameBufferHeap();

	void UnlockFrameBufferHeap();

	void SetLastBuffer(TBool aLastBuffer);

	TBool LastBuffer();

	~CVideoFrameBuffer();

private:

	CVideoFrameBuffer(TSize aFrameSize, TUncompressedVideoFormat aVideoFormat, TDisplayMode aDisplayMode);

	void ConstructL();

	CMMFBuffer* iMmfBuffer;

	TVideoPicture iVideoPicture;

	CFbsBitmap* iBitmap;

	HBufC8* iRawBuffer;

	TPtr8 iRawPtr;

	TInt iFrameBufferSize; // still need to fill this in

	TSize iFrameSize;

	TUncompressedVideoFormat iVideoFormat;

	TDisplayMode iDisplayMode;

	TBool iHeapLocked;	

	TBool iLastBuffer;

	};

/**

Buffer manager for video decoder hardware device.

@internalComponent

*/

class CMdfVideoDecoderBufferManager : public CBase 

	{

public:

	static CMdfVideoDecoderBufferManager* NewL();

	~CMdfVideoDecoderBufferManager();

	void Init(const TUncompressedVideoFormat& aFormat);

	// data buffers (input)

	CVideoDataBuffer& CreateDataBufferL(TUint aSize);

	TInt DataBuffersAvailable() const;

	CVideoDataBuffer& GetDataBufferL();

	// for convenience, allow the return of the data buffer in all permutations

	void ReturnDataBufferL(TVideoInputBuffer& aBuffer);

	// frame buffer management

	CVideoFrameBuffer& CreateFrameBufferL(TDisplayMode aDisplayMode);

	CVideoFrameBuffer& GetEmptyFrameBufferL(TBool aLockHeap);

	CVideoFrameBuffer& GetFilledFrameBufferL(TBool aLockHeap);

	void ReturnFrameBufferL(TVideoPicture& aPicture, CVideoFrameBuffer::TFrameBufferState aState);

	void ReturnFrameBufferL(CMMFBuffer* aBuffer, 

							CVideoFrameBuffer::TFrameBufferState aState,

							TBool aLastBuffer);

	TInt EmptyFrameBuffersAvailable() const;

	TInt FilledFrameBuffersAvailable() const;

	const TPictureData& LastPictureL() const;

	// getters/setters for frame attributes

	void SetFrameSize(const TSize& aSize);

	void SetFrameBufferSize(TInt aSize);	

	const TSize& FrameSize() const;

	TInt FrameBufferSize() const;

	TInt MaxFrameBuffers() const;

private:

	CMdfVideoDecoderBufferManager();

	TInt FindFrameBuffer(const CMMFBuffer* aBuffer) const;

	TInt FindFrameBuffer(const TVideoPicture& aVideoPicture) const;

	TInt FindFrameBuffer(const CVideoFrameBuffer& aFrameBuffer) const;

	void ConstructL();

private:

	// the format of the incoming video

	TUncompressedVideoFormat iFormat;

	// input data buffers

	CVideoDataBuffer* iInputBuffer;

	TBool iInputBufferInUse;

	// output frame buffers

	RPointerArray<CVideoFrameBuffer> iEmptyFrameBuffers;

	RPointerArray<CVideoFrameBuffer> iFilledFrameBuffers;

	RPointerArray<CVideoFrameBuffer> iFrameBuffersInUse;

	TSize iFrameSize;

	TInt iFrameBufferSize;

	TInt iMaxFrameBuffers;

	// last displayed frame

	TPictureData iLastDisplayedFrame;

	};

#endif // MDFVIDEODECODERBUFFERMANAGER_H