//========= Copyright (c) 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
// $NoKeywords: $
//=============================================================================//

#ifndef MILESBASE_H
#define MILESBASE_H
#ifdef _WIN32
#pragma once
#endif

// windows.h / platform.h conflicts
#pragma warning(disable:4005)
#pragma warning(disable:4201)		// nameless struct/union (mmssystem.h has this)

#include "miles/mss.h"

class CProvider
{
public:					   
				CProvider( HPROVIDER hProvider );

	static CProvider*	FindProvider( HPROVIDER hProvider );
	static void			FreeAllProviders();

	HPROVIDER	GetProviderHandle();
	
private:
	
				~CProvider();

private:

	HPROVIDER	m_hProvider;

	static CProvider	*s_pHead;
	CProvider			*m_pNext;
};


// This holds the handles and function pointers we want from a compressor/decompressor.
class ASISTRUCT
{
public:
				ASISTRUCT();
				~ASISTRUCT();

	bool		Init( void *pCallbackObject, const char *pInputFileType, 
						const char *pOutputFileType, AILASIFETCHCB cb );
	void		Shutdown();
	int			Process( void *pBuffer, unsigned int bufferSize );
	bool		IsActive() const;
	unsigned int GetProperty( HPROPERTY attribute );
	void		Seek( int position );

public:
	HPROPERTY			OUTPUT_BITS;
	HPROPERTY			OUTPUT_CHANNELS;
	HPROPERTY			OUTPUT_RATE;

	HPROPERTY			INPUT_BITS;
	HPROPERTY			INPUT_CHANNELS;
	HPROPERTY			INPUT_RATE;
	HPROPERTY			INPUT_BLOCK_SIZE;
	HPROPERTY			POSITION;

private:
	void		Clear();

private:
	ASI_STREAM_OPEN				ASI_stream_open;
	ASI_STREAM_PROCESS			ASI_stream_process;
	ASI_STREAM_CLOSE			ASI_stream_close;
	ASI_STREAM_SEEK				ASI_stream_seek;
	ASI_STREAM_PROPERTY			ASI_stream_property;

	HASISTREAM					m_stream;
	CProvider					*m_pProvider;
};


extern void IncrementRefMiles();
extern void DecrementRefMiles();

#endif // MILESBASE_H