Source code of Windows XP (NT5)
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/**********************************************************************
Copyright (c) 1994 - 1997 Microsoft Corporation. All Rights Reserved.
VitcDecode, Ken Greenebaum, November 1996**********************************************************************/#ifndef _H_VITCDECODER
#define _H_VITCDECODER
#include <wtypes.h>
#include "timecode.h"
typedef struct VITCuserBits { int user1:4; int user2:4; int user3:4; int user4:4; int user5:4; int user6:4; int user7:4; int user8:4;} bar;
class VITCdecoder { public: VITCdecoder(); // XXX really should spec format, rate...
int decodeBuffer(BYTE *buf, int bufferSize); int getTimeCode(TimeCode *tc); // convert VITC bits to SMPTE timecode
int getUserBits(VITCuserBits *bits);
private:
// threshold values for detection
int _low; int _high; int _bits[90]; int _validTimeCode; // set if the ringBuffer contains a timecode
};
#endif /* _H_VITCDECODER */
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