// 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 AVIREADER_H

#define AVIREADER_H

#include <mmf/server/mmffile.h>

#include <e32std.h>

#include <e32base.h>

#include <mmf/devvideo/devvideoplay.h>

//Observer class for CAviReader

class MAviReaderObserver

	{

public:

	virtual void AudioBufferFilled() = 0;

	virtual void VideoBufferFilled(TVideoInputBuffer* aBuffer) = 0;

	};

//The main class to read from an.avi file.

class CAviReader:public CBase,public MDataSink

	{

public:

	static CAviReader* NewL(CMMFClip& aClip,MAviReaderObserver& aObserver);

	virtual ~CAviReader();

	TTimeIntervalMicroSeconds Duration() const ;

	void SetPositionL(TInt aPosition);

	void ResetL();

	void SetPlayWindowL(TTimeIntervalMicroSeconds aStart,TTimeIntervalMicroSeconds aEnd);

	void FillVideoBufferL(TVideoInputBuffer* aBuffer);

	void FillAudioBufferL(CMMFBuffer* aBuffer);  	  	

  	void ReadNextFrameL(TUid aMediaType, TInt& aPosition);

  	TBool ReadNextFrameStartL(TInt& aStart);

  	TBool IsValidBlock(TUint aChunkId);

	TBool IsVideoInputEnd();

	TBool IsAudioInputEnd();

	void ReadComplete();

  	void AudioEnabled(TBool& aEnabled);

	void FrameRate(TReal32& aFramesPerSecond);

	void AudioCodec(TFourCC& aCodec);

	TInt SampleRate();

	void VideoMimeType(TDes8& aMimeType);

	void VideoFrameSize(TSize& aSize);

	TInt Channels();

	TInt BitsPerSample();

	TBool IsAudioDataAvailableL(TInt aStartPos);

    //MDataSink

	TFourCC SinkDataTypeCode(TMediaId aMediaId);

	void EmptyBufferL(CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId);

	void BufferFilledL(CMMFBuffer* aBuffer);

	TBool CanCreateSinkBuffer();

	CMMFBuffer* CreateSinkBufferL(TMediaId aMediaId, TBool& aReference);

	void ConstructSinkL( const TDesC8& aInitData);

private:

	//Main Avi Header

	struct TAviMainHeader	

		{

		TUint	iMicroSecPerFrame; 

		TUint	iMaxBytesPerSec;

		TUint   iPaddingGranularity;

		TUint	iFlags;

		TUint	iTotalFrames;

		TUint	iInitialFrames;

		TUint	iStreams;	

		TUint	iSuggestedBufferSize;

		TUint	iWidth;

		TUint	iHeight;

		TUint   iReserved[4];

		} iMainHeader;

	struct TAviStreamHeader	//represents stream header

		{

		TUint	iFccType;

		TUint	iFccHandler;

		TUint	iFlags;	

		TUint	iReserved;

		TUint	iInitialFrames;

		TUint	iScale;

		TUint	iRate;		

		TUint	iStart;

		TUint	iLength;	

		TUint	iSuggestedBufferSize;

		TUint   iQuality;

		TUint	iSampleSize;

		struct

			{

			TInt16 iLeft;

			TInt16 iTop;

			TInt16 iRight;

			TInt16 iBottom;

			}iRcFrame;

		};

	TAviStreamHeader iStreamHeader[2];

    struct TPcmWaveFormat

		{

		struct TWaveFormat

             { 

             TUint16  iFormatTag; 

             TUint16  iNChannels; 

             TUint  iNSamplesPerSec; 

             TUint  iNAvgBytesPerSec; 

             TUint16  iNBlockAlign;

             } iWaveFormat;

        TUint16 iBitsPerSample;

        } iPCMWaveFormat;

    //Video Stream Format

	struct TBitmapInfoHeader

		{

		TUint  iBiSize;

        TUint   iBiWidth;

        TUint   iBiHeight;

        TUint16   iBiPlanes;

        TUint16   iBiBitCount;

		TUint  iBiCompression;

		TUint  iBiSizeImage;

		TUint   iBiXPelsPerMeter;

		TUint   iBiYPelsPerMeter;

		TUint  iBiClrUsed;

		TUint  iBiClrImportant;

		}iBitmapInfoHeader;

private:

	TInt ReadFormatL();

  	void ProcessFormatL();

 	TInt FindRiffChunksL();

 	CAviReader(CMMFClip& aClip, MAviReaderObserver& aObserver);

  	void ConstructL();

  	void DoReadL(TInt aReadPosition);

  	void SetMediaEOS(TUid aMediaType);

private:

	MAviReaderObserver& iObserver;

	CMMFClip& iClip;

	CMMFDescriptorBuffer* iSourceBuffer;

	CMMFDescriptorBuffer* iAudioBuffer;

	CMMFDescriptorBuffer* iVideoBuffer;

	TInt iNumberOfStreams;

	TBool iAudioEos;

	TBool iVideoEos;	

	TInt iSourcePos;

	TInt iAudioPos;

	TInt iVideoPos;

	TUint8* iClipPos;

	TBool iAudioEnabled;

	TVideoInputBuffer* iBufferFromDevVideo;

	CMMFBuffer* iBufferFromDevSound;

	TBool iVideoRequestMade;

	TBool iAudioRequestMade;

	TBool iReadCompleted;

	TBool iReadRequestMade;

	TInt iFileSize;

	TInt iAudioIdx;

	TInt iVideoIdx;

	};

#endif