cpacemkr.cpp
上传用户:zhongxx05
上传日期:2007-06-06
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文件大小:11k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /****************************************************************************
- * Defines
- */
- #define WAIT_TIME_GRANULE 5 // in milliseconds
- /****************************************************************************
- * Includes
- */
- #include "hxcom.h"
- #include "hxtick.h"
- #include "hxassert.h"
- #include "hxcomm.h"
- #include "hxthread.h"
- #include "cpacemkr.h"
- #if defined(HELIX_CONFIG_NOSTATICS)
- # include "globals/hxglobals.h"
- #endif
- /****************************************************************************
- * CVideoPaceMaker
- */
- /****************************************************************************
- * Statitics
- */
- /****************************************************************************
- * Constructor/Destructor
- */
- CVideoPaceMaker::CVideoPaceMaker(void)
- : m_pThread(NULL)
- , m_pResponse(NULL)
- , m_bActive(FALSE)
- , m_bThreadIdle(FALSE)
- , m_bThreadActive(FALSE)
- , m_bSuspend(FALSE)
- , m_bSuspended(FALSE)
- , m_ulBaseTime(0)
- , m_pEvent(NULL)
- , m_ulInterval(0)
- , m_ulId(0)
- , m_lRefCount(0)
- {
- ;
- }
- CVideoPaceMaker::~CVideoPaceMaker(void)
- {
- HX_DELETE(m_pThread);
- HX_RELEASE(m_pResponse);
- }
- /****************************************************************************
- * Main Interface
- */
- /****************************************************************************
- * CVideoPaceMaker::Start
- */
- STDMETHODIMP CVideoPaceMaker::Start(IHXPaceMakerResponse* pResponse,
- LONG32 lPriority,
- ULONG32 ulInterval,
- ULONG32 &ulId)
- {
- HX_RESULT retVal = HXR_UNEXPECTED;
- m_bActive = TRUE;
- if ((m_pResponse == NULL) && (m_pThread == NULL))
- {
- retVal = HXR_OK;
- }
- if (retVal == HXR_OK)
- {
- retVal = HXR_INVALID_PARAMETER;
- if (pResponse)
- {
- m_pResponse = pResponse;
- pResponse->AddRef();
- retVal = HXR_OK;
- }
- }
- if (retVal == HXR_OK)
- {
- retVal = HXR_INVALID_PARAMETER;
- if (ulInterval != 0)
- {
- m_ulInterval = ulInterval;
- retVal = HXR_OK;
- }
- }
- if (retVal == HXR_OK)
- {
- ulId = m_ulId = GetNextID();
- #ifdef THREADS_SUPPORTED
- HXThread::MakeThread(m_pThread);
- #else
- HXThread::MakeStubThread(m_pThread);
- #endif
- retVal = HXR_FAIL;
- if (m_pThread)
- {
- retVal = HXR_OK;
- }
- }
- #ifdef THREADS_SUPPORTED
- if (retVal == HXR_OK)
- {
- AddRef();
- m_bThreadActive = TRUE;
- retVal = m_pThread->CreateThread(ThreadRoutine,
- (void*) this);
- if (FAILED(retVal))
- {
- m_bThreadActive = FALSE;
- Release();
- }
- }
- #endif
- if (retVal == HXR_OK)
- {
- retVal = m_pThread->SetPriority(lPriority);
- }
- if (retVal != HXR_OK)
- {
- m_bActive = FALSE;
- }
- return retVal;
- }
- /****************************************************************************
- * CVideoPaceMaker::Stop
- */
- STDMETHODIMP CVideoPaceMaker::Stop(void)
- {
- HX_RESULT retVal = HXR_UNEXPECTED;
- if (m_bActive)
- {
- m_bActive = FALSE;
- retVal = HXR_OK;
- }
- return retVal;
- }
- /****************************************************************************
- * CVideoPaceMaker::Stop
- */
- STDMETHODIMP CVideoPaceMaker::Suspend(BOOL bSuspend)
- {
- HX_RESULT retVal = HXR_UNEXPECTED;
- if ((!(m_bSuspend && bSuspend)) && (bSuspend || m_bSuspend))
- {
- m_bSuspend = bSuspend;
- retVal = HXR_OK;
- }
- return retVal;
- }
- HX_RESULT CVideoPaceMaker::Signal(void)
- {
- HX_RESULT retVal = HXR_UNEXPECTED;
- if (m_pEvent)
- {
- retVal = m_pEvent->SignalEvent();
- }
- return retVal;
- }
- STDMETHODIMP CVideoPaceMaker::WaitForStop(void)
- {
- HX_RESULT retVal = HXR_FAIL;
- HXEvent* pEvent = NULL;
- #if defined THREADS_SUPPORTED
- HXEvent::MakeEvent(pEvent, NULL, TRUE);
- #else
- HXEvent::MakeStubEvent(pEvent, NULL, TRUE);
- #endif
- if (pEvent)
- {
- retVal = HXR_OK;
- while (m_bThreadActive)
- {
- pEvent->Wait(WAIT_TIME_GRANULE);
- }
- }
- HX_DELETE(pEvent);
- return retVal;
- }
- STDMETHODIMP CVideoPaceMaker::WaitForSuspend(void)
- {
- HX_RESULT retVal = HXR_FAIL;
- HXEvent* pEvent = NULL;
- #ifdef THREADS_SUPPORTED
- HXEvent::MakeEvent(pEvent, NULL, TRUE);
- #else
- HXEvent::MakeStubEvent(pEvent, NULL, TRUE);
- #endif
- if (pEvent)
- {
- retVal = HXR_OK;
- while (m_bThreadActive && (!m_bSuspended))
- {
- pEvent->Wait(WAIT_TIME_GRANULE);
- }
- }
- HX_DELETE(pEvent);
- return retVal;
- }
- STDMETHODIMP CVideoPaceMaker::SetPriority(LONG32 lPriority)
- {
- HX_RESULT retVal = HXR_UNEXPECTED;
- if (m_pThread)
- {
- retVal = m_pThread->SetPriority(lPriority);
- }
- return retVal;
- }
- STDMETHODIMP CVideoPaceMaker::SetInterval(ULONG32 ulInterval)
- {
- m_ulInterval = ulInterval;
- return HXR_OK;
- }
- /****************************************************************************
- * Private Methods
- */
- /****************************************************************************
- * CVideoPaceMaker::OnThreadStart
- */
- void CVideoPaceMaker::OnThreadStart(void)
- {
- HX_ASSERT(m_pResponse);
- HX_ASSERT(!m_pEvent);
- #ifdef THREADS_SUPPORTED
- HXEvent::MakeEvent(m_pEvent, NULL, TRUE);
- #else
- HXEvent::MakeStubEvent(m_pEvent, NULL, TRUE);
- #endif
- #ifdef THREADS_SUPPORTED
- m_pResponse->OnPaceStart(m_ulId);
- #endif
- }
- /****************************************************************************
- * CVideoPaceMaker::OnThreadEnd
- */
- void CVideoPaceMaker::OnThreadEnd(void)
- {
- HX_ASSERT(m_pResponse);
- HX_DELETE(m_pEvent);
- #ifdef THREADS_SUPPORTED
- m_pResponse->OnPaceEnd(m_ulId);
- #endif
- m_pResponse->Release();
- m_pResponse = NULL;
- m_bThreadActive = FALSE;
- }
- /****************************************************************************
- * CVideoPaceMaker::DecoderThreadRoutine
- */
- void* CVideoPaceMaker::ThreadRoutine(void* pArg)
- {
- CVideoPaceMaker* pThis = (CVideoPaceMaker*) pArg;
- HX_ASSERT(pThis);
- pThis->OnThreadStart();
- do
- {
- pThis->m_bThreadIdle = FALSE;
- pThis->m_pResponse->OnPace(pThis->m_ulId);
- pThis->m_bThreadIdle = TRUE;
- do
- {
- if (pThis->m_pEvent->Wait(pThis->m_ulInterval) == HXR_OK)
- {
- pThis->m_pEvent->ResetEvent();
- }
- if (pThis->m_bSuspend)
- {
- pThis->m_bSuspended = TRUE;
- }
- else
- {
- pThis->m_bSuspended = FALSE;
- }
- } while (pThis->IsActive() && pThis->IsSuspended());
- } while (pThis->IsActive());
- pThis->OnThreadEnd();
- pThis->Release();
- return NULL;
- }
- /****************************************************************************
- * IUnknown::AddRef ref: hxcom.h
- *
- * This routine increases the object reference count in a thread safe
- * manner. The reference count is used to manage the lifetime of an object.
- * This method must be explicitly called by the user whenever a new
- * reference to an object is used.
- */
- STDMETHODIMP_(ULONG32) CVideoPaceMaker::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- /****************************************************************************
- * IUnknown::Release ref: hxcom.h
- *
- * This routine decreases the object reference count in a thread safe
- * manner, and deletes the object if no more references to it exist. It must
- * be called explicitly by the user whenever an object is no longer needed.
- */
- STDMETHODIMP_(ULONG32) CVideoPaceMaker::Release()
- {
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
-
- delete this;
- return 0;
- }
- /****************************************************************************
- * IUnknown::QueryInterface ref: hxcom.h
- *
- * This routine indicates which interfaces this object supports. If a given
- * interface is supported, the object's reference count is incremented, and
- * a reference to that interface is returned. Otherwise a NULL object and
- * error code are returned. This method is called by other objects to
- * discover the functionality of this object.
- */
- STDMETHODIMP CVideoPaceMaker::QueryInterface(REFIID riid, void** ppvObj)
- {
- QInterfaceList qiList[] =
- {
- { GET_IIDHANDLE(IID_IUnknown), (IUnknown*) this },
- { GET_IIDHANDLE(IID_IHXPaceMaker), (IHXPaceMaker*) this },
- };
- return QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
- }
- LONG32 CVideoPaceMaker::GetNextID()
- {
- #if defined(HELIX_CONFIG_NOSTATICS)
- const LONG32 zlLastId = 0;
- LONG32& it = HXGlobalInt32::Get(&zlLastId, 0 );
- return InterlockedIncrement(&it);
-
- #else
- static LONG32 zlLastId = 0;
- return InterlockedIncrement(&zlLastId);
- #endif
- }