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//------------------------------------------------------------------------------------
// $Id: Utils.h,v 1.6 2006/03/21 07:00:57 ivanr Exp $
//
// Desc: DirectShow utility class header
//
// Copyright (c) Blackmagic Design 2005. All rights reserved.
//------------------------------------------------------------------------------------

#pragma once

#include <string>
#include <dvdmedia.h>

//------------------------------------------------------------------------------------
// CDSUtils - Directshow utility class
//------------------------------------------------------------------------------------
class CDSUtils
{
public:
	static HRESULT AddFilter(IGraphBuilder* pGraph, const GUID &clsid, LPCWSTR pName, IBaseFilter** ppFilter);
	static HRESULT AddFilter2(IGraphBuilder* pGraph, const GUID &clsid, LPCWSTR pName, IBaseFilter** ppFilter);

	static HRESULT GetUnconnectedPin(IBaseFilter* pFilter, PIN_DIRECTION PinDir, IPin** ppPin);
	static HRESULT GetPin(IBaseFilter* pFilter, const wchar_t* pName, IPin** ppPin);
	static HRESULT GetPin(IBaseFilter* pFilter, const GUID* pFormat, PIN_DIRECTION PinDir, IPin** ppPin);

	static HRESULT ConnectFilters(IGraphBuilder* pGraph, IBaseFilter* pUpstream, wchar_t* pUpstreamPinName, IBaseFilter* pDownstream, wchar_t* pDownstreamPinName);
	static HRESULT ConnectFilters(IGraphBuilder* pGraph, IBaseFilter* pUpstream, IBaseFilter* pDownstream, const GUID* pFormat);
	static HRESULT RenderFilter(IGraphBuilder* pGraph, IBaseFilter* pUpstream, wchar_t* pUpstreamPinName);

	static HRESULT DisconnectAllPins(IGraphBuilder* pGraph);
	
	static HRESULT FindFilterInterface(IBaseFilter* pFilter, const IID& riid, void** ppvInterface);
	static HRESULT FindPinInterface(IBaseFilter* pFilter, wchar_t* pName, const IID& riid, void** ppvInterface);
	static HRESULT FindPinInterface(IBaseFilter* pFilter, const GUID* pFormat, PIN_DIRECTION PinDir, const IID& riid, void** ppvInterface);

	static HRESULT AddGraphToRot(IUnknown* pUnkGraph, DWORD* pdwRegister);
	static void RemoveGraphFromRot(DWORD pdwRegister);
};

//------------------------------------------------------------------------------------
// CRegUtils - Registry utility class
//------------------------------------------------------------------------------------
class CRegUtils
{
public:
	CRegUtils();
	~CRegUtils();

	LONG Open(LPCTSTR lpSubKey);
	LONG Create(LPCTSTR lpSubKey);
	void Close();

	LONG SetString(LPCTSTR valueName, const BYTE* lpData, DWORD cbData);
	LONG GetString(LPCTSTR valueName, LPBYTE lpData, DWORD cbData);

	LONG SetBinary(LPCTSTR valueName, const BYTE* lpData, DWORD cbData);
	LONG GetBinary(LPCTSTR valueName, LPBYTE lpData, DWORD cbData);

	LONG SetDword(LPCTSTR valueName, const BYTE* lpData, DWORD cbData);
	LONG GetDword(LPCTSTR valueName, LPBYTE lpData, DWORD cbData);

private:
	std::string m_subKeyName;
	HKEY m_hKey;
};

//------------------------------------------------------------------------------------
// CUtils - utility class
//------------------------------------------------------------------------------------
class CUtils
{
public:
	static BITMAPINFOHEADER* GetBMIHeader(const AM_MEDIA_TYPE* pamt);
	static BITMAPINFOHEADER* GetBMIHeader(const CMediaType& mt);
	static REFERENCE_TIME GetAvgTimePerFrame(const AM_MEDIA_TYPE* pamt);
	static unsigned long GetImageSize(BITMAPINFOHEADER* pbmih);
};

//------------------------------------------------------------------------------
// UNITS = 10 ^ 7  
// UNITS / 30 = 30 fps;
// UNITS / 20 = 20 fps, etc
const REFERENCE_TIME FPS_30 = UNITS / 30;
const REFERENCE_TIME FPS_2997 = UNITS * 1001 / 30000;
const REFERENCE_TIME FPS_25 = UNITS / 25;
const REFERENCE_TIME FPS_24 = UNITS / 24;
const REFERENCE_TIME FPS_23976 = UNITS * 1001 / 24000;
const REFERENCE_TIME FPS_20 = UNITS / 20;
const REFERENCE_TIME FPS_10 = UNITS / 10;
const REFERENCE_TIME FPS_5  = UNITS / 5;
const REFERENCE_TIME FPS_4  = UNITS / 4;
const REFERENCE_TIME FPS_3  = UNITS / 3;
const REFERENCE_TIME FPS_2  = UNITS / 2;
const REFERENCE_TIME FPS_1  = UNITS / 1;

//------------------------------------------------------------------------------
#define SAFE_DELETE(p)			{ if(p) { delete (p);     (p)=NULL; } }
#define SAFE_DELETE_ARRAY(p)	{ if(p) { delete [] (p);     (p)=NULL; } }
#define SAFE_RELEASE(p)			{ if(p) { (p)->Release(); (p)=NULL; } }
#define SIZEOF_ARRAY(x)			(sizeof(x)/sizeof((x)[0]))