82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
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// Copyright (c) 1997 - 1998 Microsoft Corporation. All Rights Reserved.
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#ifndef __UTIL_H_INC__
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#define __UTIL_H_INC__
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bool IsSameObject(IUnknown *pUnk1, IUnknown *pUnk2);
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STDAPI_(void) TStringFromGUID(const GUID* pguid, LPTSTR pszBuf);
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#ifdef UNICODE
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#define WStringFromGUID TStringFromGUID
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#else
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STDAPI_(void) WStringFromGUID(const GUID* pguid, LPWSTR pszBuf);
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#endif
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void InitMediaType(AM_MEDIA_TYPE *pmt);
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void DeleteMediaType(AM_MEDIA_TYPE *pmt);
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bool IsEqualMediaType(AM_MEDIA_TYPE const & mt1, AM_MEDIA_TYPE const & mt2);
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void CopyMediaType(AM_MEDIA_TYPE *pmtTarget, const AM_MEDIA_TYPE *pmtSource);
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AM_MEDIA_TYPE * CreateMediaType(AM_MEDIA_TYPE *pSrc);
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void FreeMediaType(AM_MEDIA_TYPE& mt);
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AM_MEDIA_TYPE * WINAPI AllocVideoMediaType(const AM_MEDIA_TYPE * pmtSource);
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HRESULT ConvertMediaTypeToSurfaceDesc(const AM_MEDIA_TYPE *pmt,
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IDirectDraw *pDD,
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IDirectDrawPalette **ppPalette,
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LPDDSURFACEDESC pSurfaceDesc);
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HRESULT ConvertSurfaceDescToMediaType(
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const DDSURFACEDESC *pSurfaceDesc, IDirectDrawPalette *pPalette, const RECT *pRect,
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BOOL bInvertSize, AM_MEDIA_TYPE **ppMediaType,
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AM_MEDIA_TYPE *pmtTemplate = 0 // preserve any type information
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);
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const DDPIXELFORMAT * GetDefaultPixelFormatPtr(IDirectDraw *pDirectDraw);
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bool VideoSubtypeFromPixelFormat(const DDPIXELFORMAT *pPixelFormat, GUID *pSubType);
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bool IsSupportedType(const DDPIXELFORMAT *pPixelFormat);
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bool ComparePixelFormats(const DDPIXELFORMAT *pFormat1,
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const DDPIXELFORMAT *pFormat2);
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/* Class to track timestamps for fixed bitrate data */
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class CTimeStamp
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{
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public:
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CTimeStamp()
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{
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Reset();
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}
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void Reset()
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{
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m_lBytesSinceTimeStamp = 0;
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m_rt = 0;
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}
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void SetTime(REFERENCE_TIME rt)
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{
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m_rt = rt;
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m_lBytesSinceTimeStamp = 0;
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}
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void AccumulateBytes(LONG lBytes)
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{
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m_lBytesSinceTimeStamp += lBytes;
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}
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REFERENCE_TIME TimeStamp(LONG lOffset, LONG lByteRate) const
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{
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_ASSERTE(lByteRate > 0);
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// Do the conversion
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return m_rt + MulDiv(m_lBytesSinceTimeStamp + lOffset,
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10000000L,
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lByteRate);
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}
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private:
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LONG m_lBytesSinceTimeStamp;
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REFERENCE_TIME m_rt;
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};
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#endif __UTIL_H_INC__
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