D-Modem/pjproject-2.11.1/third_party/BaseClasses/fourcc.h

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2021-10-30 02:41:03 +08:00
//------------------------------------------------------------------------------
// File: FourCC.h
//
// Desc: DirectShow base classes.
//
// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
// FOURCCMap
//
// provides a mapping between old-style multimedia format DWORDs
// and new-style GUIDs.
//
// A range of 4 billion GUIDs has been allocated to ensure that this
// mapping can be done straightforwardly one-to-one in both directions.
//
// January 95
#ifndef __FOURCC__
#define __FOURCC__
// Multimedia format types are marked with DWORDs built from four 8-bit
// chars and known as FOURCCs. New multimedia AM_MEDIA_TYPE definitions include
// a subtype GUID. In order to simplify the mapping, GUIDs in the range:
// XXXXXXXX-0000-0010-8000-00AA00389B71
// are reserved for FOURCCs.
class FOURCCMap : public GUID
{
public:
FOURCCMap();
FOURCCMap(DWORD Fourcc);
FOURCCMap(const GUID *);
DWORD GetFOURCC(void);
void SetFOURCC(DWORD fourcc);
void SetFOURCC(const GUID *);
private:
void InitGUID();
};
#define GUID_Data2 0
#define GUID_Data3 0x10
#define GUID_Data4_1 0xaa000080
#define GUID_Data4_2 0x719b3800
inline void
FOURCCMap::InitGUID() {
Data2 = GUID_Data2;
Data3 = GUID_Data3;
((DWORD *)Data4)[0] = GUID_Data4_1;
((DWORD *)Data4)[1] = GUID_Data4_2;
}
inline
FOURCCMap::FOURCCMap() {
InitGUID();
SetFOURCC( DWORD(0));
}
inline
FOURCCMap::FOURCCMap(DWORD fourcc)
{
InitGUID();
SetFOURCC(fourcc);
}
inline
FOURCCMap::FOURCCMap(const GUID * pGuid)
{
InitGUID();
SetFOURCC(pGuid);
}
inline void
FOURCCMap::SetFOURCC(const GUID * pGuid)
{
FOURCCMap * p = (FOURCCMap*) pGuid;
SetFOURCC(p->GetFOURCC());
}
inline void
FOURCCMap::SetFOURCC(DWORD fourcc)
{
Data1 = fourcc;
}
inline DWORD
FOURCCMap::GetFOURCC(void)
{
return Data1;
}
#endif /* __FOURCC__ */