/***************************************************************************
 * E-Com Technology Ltd.
 *
 * ECOMPACS DICOM Network Transport Libraries * Version 0.1 Beta
 ***************************************************************************/


class IFileBuffer;
//class ISeekBuffer;


class DICOM_API FrameIterator
{
public:
	FrameIterator ();
	FrameIterator (DICOMImage * Image);
	~FrameIterator ();

public:
	bool SetFileName (const char * szFileName);
	bool SetDicomImage (DICOMImage * Image);

public:
	bool Next ();
	bool Seek (int FrameIndex);

protected:
	bool NextFrameOfStream ();
	bool SeekFrameOfStream (int FrameIndex);

	bool NextFrameOfFile ();
	bool SeekFrameOfFile (int FrameIndex);

public:
	UINT32 GetFrameLength ()
	{
		return CurrentFrameLength;
	}

	void * Detach (void)
	{
		void * tmp = PixelData;
		PixelData = NULL;
		return tmp;
	}

	void * GetData (void)
	{
		return PixelData;
	}

protected:
	void	Init (DICOMImage * pImage);

	BOOL	Decompress (void);

	BOOL	JPEGBaselineDecode (void);
	BOOL	RLEDecode (void);
	BOOL	JP2KLosslessDecode (void);
	BOOL	JP2KLossyDecode (void);
	BOOL	JPEGProc14Decode (void);
	BOOL	JPEGProc14SV1Decode (void);

	BOOL	JPEGExtendedProcDecode (void);
	BOOL	JPEGSpectralProcDecode (void);
	BOOL	JPEGFullProgressDecode (void);

protected:
	UINT32	CurrentFrameLength;
	UINT32	EveryFrameLength;
	void *	PixelData;

	UID		ImageTransferSyntax;

protected:
	DICOMImage * m_pDicomImage;

protected:
	int		Rows;
	int		Columns;
	int		BitsAllocated;
	int		BitsStored;
	int		HighBit;
	int		SamplesPerPixel;

	UINT32	TagLength;

	enum TransferSyntaxType
	{
		TST_Invalid = 0,
		TST_LittleEndianImplicit = 1,
		TST_LittleEndianExplicit,
		TST_BigEndianExplicit,
		TST_LittleEndianCompress
	};

	enum PhotometricInterpretation
	{
		PI_INVALID = 0,
		PI_8BITS = 1,
		PI_16BITS,
		PI_RGB
	};

	enum TransferSyntaxType TransferSyntaxType;

//	IFileBuffer * IFB;
	IFileBuffer * m_ISB;
//	ISeekBuffer * m_ISB;

	PhotometricInterpretation m_PI;

	ULONG * m_pPosition;

	int		m_NbOfFrames;
	int		m_nFrameIndex;

	bool	m_bIsValid;
	bool	m_bIsStream;
};