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