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