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*/
#if !defined(__ACSimpleCodec_h__)
#define __ACSimpleCodec_h__

//=============================================================================
//	Includes
//=============================================================================

#include "ACBaseCodec.h"

//=============================================================================
//	ACSimpleCodec
//
//	This extension of ACBaseCodec provides for a simple ring buffer to handle
//	input data.
//=============================================================================

class ACSimpleCodec
:
	public ACBaseCodec
{

//	Construction/Destruction
public:
						ACSimpleCodec(UInt32 inInputBufferByteSize, OSType theSubType);
	virtual				~ACSimpleCodec();

//	Data Handling
public:
	virtual void		Initialize(const AudioStreamBasicDescription* inInputFormat, const AudioStreamBasicDescription* inOutputFormat, const void* inMagicCookie, UInt32 inMagicCookieByteSize) = 0;
	virtual void		Uninitialize();
	virtual void		Reset();

	virtual void		AppendInputBuffer(const void* inInputData, UInt32 inOffset, UInt32& ioInputDataByteSize);
	virtual void		AppendInputData(const void* inInputData, UInt32& ioInputDataByteSize, UInt32& ioNumberPackets, const AudioStreamPacketDescription* inPacketDescription);
	virtual void		ZeroPadInputData(UInt32& ioNumberPackets, const AudioStreamPacketDescription* inPacketDescription);
	virtual UInt32		GetInputBufferByteSize() const;
	virtual UInt32		GetUsedInputBufferByteSize() const;
	virtual void		GetPropertyInfo(AudioCodecPropertyID inPropertyID, UInt32& outPropertyDataSize, Boolean& outWritable);
	virtual void		SetProperty(AudioCodecPropertyID inPropertyID, UInt32 inPropertyDataSize, const void* inPropertyData);

protected:
	void				ConsumeInputData(UInt32 inConsumedByteSize);	
	Byte*				GetInputBufferStart() const { return mInputBuffer + mInputBufferStart; }
	UInt32				GetInputBufferContiguousByteSize() const { return (mInputBufferStart <= mInputBufferEnd) ? (mInputBufferEnd - mInputBufferStart) : (mInputBufferByteSize - mInputBufferStart); }
	virtual void		ReallocateInputBuffer(UInt32 inInputBufferByteSize);
	
	// returns a pointer to contiguous bytes. 
	// will do some copying if the request wraps around the internal buffer.
	// request must be less than available bytes
	Byte*				GetBytes(UInt32& ioNumberBytes) const;

private:	
	Byte*				mInputBuffer;
	UInt32				mInputBufferByteSize;
	UInt32				mInputBufferStart;
	UInt32				mInputBufferEnd;

};

#endif
