vdclback.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: vdclback.cpp,v 1.1.36.1 2004/07/09 01:55:25 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * 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 ***** */
- /*
- * Class Implementation for CQTVideoRenderer::CVideoSchedulerCallback
- */
- #include "hxtypes.h"
- #include "hxwintyp.h"
- #include "hxresult.h"
- #include "hxcom.h"
- #include "hxevent.h"
- #include "hxcomm.h"
- #include "hxengin.h"
- #include "hxerror.h"
- #include "hxtick.h"
- #include "hxassert.h"
- #include "timeval.h"
- #include "vdclback.h"
- CVideoSchedulerCallback::CVideoSchedulerCallback
- (
- FP_CALLBACK pFunc,
- void* cookie,
- IUnknown* pIUnknown,
- BOOL bUseOptimizedScheduler
- )
- : m_lRefCount(0)
- , m_pScheduler(NULL)
- , m_pFunc(pFunc)
- , m_pOptimizedScheduler(NULL)
- , m_bPendingCallback(FALSE)
- , m_bInCallback(FALSE)
- , m_PendingHandle(0)
- , m_bIsInterruptSafe(bUseOptimizedScheduler)
- , m_cookie(cookie)
- {
- if (bUseOptimizedScheduler)
- {
- if (HXR_OK != pIUnknown->QueryInterface(IID_IHXOptimizedScheduler,
- (void **) &m_pOptimizedScheduler))
- {
- // just for good luck
- m_pOptimizedScheduler = NULL;
- }
- }
- if (m_pOptimizedScheduler == NULL)
- {
- if (HXR_OK != pIUnknown->QueryInterface(IID_IHXScheduler,
- (void **) &m_pScheduler))
- {
- m_pScheduler = NULL;
- }
- }
- }
- STDMETHODIMP
- CVideoSchedulerCallback::Close()
- {
- // the optimized scheduler has presidence so we check it first
- if (m_bPendingCallback && m_pOptimizedScheduler)
- {
- m_pOptimizedScheduler->Remove(m_PendingHandle);
- m_bPendingCallback = FALSE;
- m_PendingHandle = 0;
- }
- HX_RELEASE(m_pOptimizedScheduler);
- if (m_bPendingCallback && m_pScheduler)
- {
- m_pScheduler->Remove(m_PendingHandle);
- m_bPendingCallback = FALSE;
- m_PendingHandle = 0;
- }
- HX_RELEASE(m_pScheduler);
- return HXR_OK;
- }
- CVideoSchedulerCallback::~CVideoSchedulerCallback()
- {
- Close();
- }
- STDMETHODIMP
- CVideoSchedulerCallback::ScheduleCallback
- (
- UINT32 ulRelativeTime,
- UINT32 ulTicksTime
- )
- {
- // this new callback is going to take presidence over the
- // current one so remove it.
- if (m_pOptimizedScheduler != NULL || m_pScheduler != NULL)
- {
- IHXCallback* pCallback = NULL;
- if (HXR_OK == QueryInterface(IID_IHXCallback, (void**)&pCallback))
- {
- HXTimeval lTime;
- // Always use the optimized scheduler if we have one
- if (m_pOptimizedScheduler != NULL)
- {
- lTime = m_pOptimizedScheduler->GetCurrentSchedulerTime();
- }
- else
- {
- lTime = m_pScheduler->GetCurrentSchedulerTime();
- }
- UINT32 ulCurrentTime = HX_GET_BETTERTICKCOUNT();
- // if ulTicksTime is in the future, add the difference to lTime,
- // if it's in the past, don't add anything to lTime so we schedule
- // an imediate callback.
- if (ulCurrentTime < ulTicksTime)
- {
- UINT32 ulTimeDiff = CALCULATE_ELAPSED_TICKS(ulCurrentTime,
- ulTicksTime);
- lTime.tv_usec += ulTimeDiff * MILLISECOND;
- if (lTime.tv_usec >= SECOND)
- {
- lTime.tv_sec += lTime.tv_usec / SECOND;
- lTime.tv_usec %= SECOND;
- }
- }
-
- // we want to do the right thing here and remove a callback before we schedule a new one
- // but we should never do that.
- HX_ASSERT(!m_bPendingCallback);
- if (m_bPendingCallback)
- {
- // Always use the optimized scheduler if we have one
- if (m_pOptimizedScheduler != NULL)
- {
- m_pOptimizedScheduler->Remove(m_PendingHandle);
- }
- else if (m_pScheduler)
- {
- m_pScheduler->Remove(m_PendingHandle);
- }
- }
-
- m_bPendingCallback = TRUE;
- // Always use the optimized scheduler if we have one
- if (m_pOptimizedScheduler != NULL)
- {
- m_PendingHandle = m_pOptimizedScheduler->AbsoluteEnter(pCallback, lTime);
- }
- else
- {
- m_PendingHandle = m_pScheduler->AbsoluteEnter(pCallback, lTime);
- }
- }
- HX_RELEASE(pCallback);
- }
- return HXR_OK;
- }
- STDMETHODIMP
- CVideoSchedulerCallback::Func(void)
- {
- m_bInCallback = TRUE;
- if (m_pFunc != NULL )
- {
- HX_ASSERT(m_bPendingCallback);
-
- HXTimeval lTime;
- // Always use the optimized scheduler if we have one
- if (m_pOptimizedScheduler != NULL)
- {
- lTime = m_pOptimizedScheduler->GetCurrentSchedulerTime();
- }
- else
- {
- lTime = m_pScheduler->GetCurrentSchedulerTime();
- }
- m_PendingHandle = 0;
- m_bPendingCallback = FALSE;
- m_pFunc(m_cookie);
- }
- m_bInCallback = FALSE;
- return HXR_OK;
- }
- STDMETHODIMP_(BOOL)
- CVideoSchedulerCallback::ShouldKickStartScheduler()
- {
- return !(m_bPendingCallback || (!m_bPendingCallback && m_bInCallback));
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::QueryInterface
- // Purpose:
- // Implement this to export the interfaces supported by your
- // object.
- //
- STDMETHODIMP
- CVideoSchedulerCallback::QueryInterface
- (
- REFIID riid,
- void** ppvObj
- )
- {
- if (IsEqualIID(riid, IID_IUnknown))
- {
- AddRef();
- *ppvObj = this;
- return HXR_OK;
- }
- else if (IsEqualIID(riid, IID_IHXCallback))
- {
- AddRef();
- *ppvObj = (IHXCallback*)this;
- return HXR_OK;
- }
- else if (IsEqualIID(riid, IID_IHXInterruptSafe))
- {
- AddRef();
- *ppvObj = (IHXInterruptSafe*)this;
- return HXR_OK;
- }
- *ppvObj = NULL;
- return HXR_NOINTERFACE;
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::AddRef
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32)
- CVideoSchedulerCallback::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::Release
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32)
- CVideoSchedulerCallback::Release()
- {
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- STDMETHODIMP_(BOOL)
- CVideoSchedulerCallback::IsInterruptSafe()
- {
- return m_bIsInterruptSafe;
- }