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/*
* (C) 2010-2014 see Authors.txt
*
* This file is part of MPC-HC.
*
* MPC-HC is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* MPC-HC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "stdafx.h"
#include "SyncClock.h"
CSyncClockFilter::CSyncClockFilter(LPUNKNOWN pUnk, HRESULT* phr)
: CBaseFilter(NAME("SyncClock"), nullptr, &m_Lock, CLSID_NULL)
, m_Clock(static_cast<IBaseFilter*>(this), phr)
{
}
CSyncClockFilter::~CSyncClockFilter()
{
}
STDMETHODIMP CSyncClockFilter::AdjustClock(double adjustment)
{
m_Clock.adjustment = adjustment;
return S_OK;
}
STDMETHODIMP CSyncClockFilter::SetBias(double bias)
{
m_Clock.bias = bias;
return S_OK;
}
STDMETHODIMP CSyncClockFilter::GetBias(double* bias)
{
*bias = m_Clock.bias;
return S_OK;
}
STDMETHODIMP CSyncClockFilter::GetStartTime(REFERENCE_TIME* startTime)
{
*startTime = m_tStart;
return S_OK;
}
STDMETHODIMP CSyncClockFilter::NonDelegatingQueryInterface(REFIID riid, void** ppv)
{
CheckPointer(ppv, E_POINTER);
if (riid == IID_IReferenceClock) {
return GetInterface(static_cast<IReferenceClock*>(&m_Clock), ppv);
} else if (riid == IID_ISyncClock) {
return GetInterface(static_cast<ISyncClock*>(this), ppv);
} else {
return CBaseFilter::NonDelegatingQueryInterface(riid, ppv);
}
}
int CSyncClockFilter::GetPinCount()
{
return 0;
}
CBasePin* CSyncClockFilter::GetPin(int i)
{
UNREFERENCED_PARAMETER(i);
return nullptr;
}
// CSyncClock methods
CSyncClock::CSyncClock(LPUNKNOWN pUnk, HRESULT* phr)
: CBaseReferenceClock(NAME("SyncClock"), pUnk, phr)
, adjustment(1.0)
, bias(1.0)
, m_rtPrivateTime(GetTicks100ns())
, m_llPerfFrequency(0)
, m_rtPrevTime(m_rtPrivateTime)
, m_pCurrentRefClock(0)
, m_pPrevRefClock(0)
{
QueryPerformanceFrequency((LARGE_INTEGER*)&m_llPerfFrequency);
}
REFERENCE_TIME CSyncClock::GetPrivateTime()
{
CAutoLock cObjectLock(this);
REFERENCE_TIME rtTime = GetTicks100ns();
REFERENCE_TIME delta = rtTime - m_rtPrevTime;
// We ignore that rtTime may wrap around. Not gonna happen too often
m_rtPrevTime = rtTime;
delta = (REFERENCE_TIME)((double)delta * adjustment * bias);
m_rtPrivateTime = m_rtPrivateTime + delta;
return m_rtPrivateTime;
}
REFERENCE_TIME CSyncClock::GetTicks100ns()
{
LONGLONG i64Ticks100ns;
if (m_llPerfFrequency != 0) {
QueryPerformanceCounter((LARGE_INTEGER*)&i64Ticks100ns);
i64Ticks100ns = LONGLONG((double(i64Ticks100ns) * 10000000) / double(m_llPerfFrequency) + 0.5);
return (REFERENCE_TIME)i64Ticks100ns;
}
return 0;
}
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