56 lines
1.9 KiB
C
56 lines
1.9 KiB
C
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// Copyright (c) 1996-2000 Microsoft Corporation. All rights reserved.
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/* PLClock.h
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*/
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#ifndef __PLCLOCK_H__
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#define __PLCLOCK_H__
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#define IReferenceClock IMasterClock
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/*****************************************************************************
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* class CPhaseLockClock
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*****************************************************************************
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* This implements a clock that phase locks two reference clocks.
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*/
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class CPhaseLockClock
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{
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public:
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CPhaseLockClock();
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void Start(REFERENCE_TIME rfMasterTime, REFERENCE_TIME rfSlaveTime);
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void GetSlaveTime(REFERENCE_TIME rfSlaveTime,REFERENCE_TIME *prfTime);
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void SetSlaveTime(REFERENCE_TIME rfSlaveTime,REFERENCE_TIME *prfTime);
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void SyncToMaster(REFERENCE_TIME rfSlaveTime, REFERENCE_TIME rfMasterTime);
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private:
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REFERENCE_TIME m_rfOffset;
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};
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/*****************************************************************************
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* class CSampleClock
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*****************************************************************************
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* This implements a clock that translates between a sample time and a
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* reference time, doing any phase locking in a child CPhaseLockClock object.
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*/
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class CSampleClock
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{
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public:
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CSampleClock();
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void Start(IReferenceClock *pIClock, DWORD dwSampleRate, LONGLONG llSampleTime);
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void SampleToRefTime(LONGLONG llSampleTime,REFERENCE_TIME *prfTime);
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void SyncToMaster(LONGLONG llSampleTime, IReferenceClock *pIClock);
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void SyncToMaster(REFERENCE_TIME rfSlaveTime, REFERENCE_TIME rfMasterTime);
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LONGLONG RefTimeToSample(REFERENCE_TIME rfTime);
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private:
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CPhaseLockClock m_PLClock;
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LONGLONG m_llStart; // Initial sample offset.
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REFERENCE_TIME m_rfStart;
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DWORD m_dwSampleRate;
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};
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#endif // __PLCLOCK_H__
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