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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DIRECTSHOWSAMPLESCHEDULER_H
+#define DIRECTSHOWSAMPLESCHEDULER_H
+
+#include <QtCore/qmutex.h>
+#include <QtCore/qobject.h>
+#include <QtCore/qsemaphore.h>
+
+#include <dshow.h>
+
+class DirectShowTimedSample;
+
+class DirectShowSampleScheduler : public QObject, public IMemInputPin
+{
+ Q_OBJECT
+public:
+
+ enum State
+ {
+ Stopped = 0x00,
+ Running = 0x01,
+ Paused = 0x02,
+ RunMask = 0x03,
+ Flushing = 0x04
+ };
+
+ DirectShowSampleScheduler(IUnknown *pin, QObject *parent = 0);
+ ~DirectShowSampleScheduler();
+
+ // IUnknown
+ HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject);
+ ULONG STDMETHODCALLTYPE AddRef();
+ ULONG STDMETHODCALLTYPE Release();
+
+ // IMemInputPin
+ HRESULT STDMETHODCALLTYPE GetAllocator(IMemAllocator **ppAllocator);
+ HRESULT STDMETHODCALLTYPE NotifyAllocator(IMemAllocator *pAllocator, BOOL bReadOnly);
+ HRESULT STDMETHODCALLTYPE GetAllocatorRequirements(ALLOCATOR_PROPERTIES *pProps);
+
+ HRESULT STDMETHODCALLTYPE Receive(IMediaSample *pSample);
+ HRESULT STDMETHODCALLTYPE ReceiveMultiple(IMediaSample **pSamples, long nSamples, long *nSamplesProcessed);
+ HRESULT STDMETHODCALLTYPE ReceiveCanBlock();
+
+ void run(REFERENCE_TIME startTime);
+ void pause();
+ void stop();
+ void setFlushing(bool flushing);
+
+ IReferenceClock *clock() const { return m_clock; }
+ void setClock(IReferenceClock *clock);
+
+ bool schedule(IMediaSample *sample);
+ bool scheduleEndOfStream();
+
+ IMediaSample *takeSample(bool *eos);
+
+ bool event(QEvent *event);
+
+Q_SIGNALS:
+ void sampleReady();
+
+private:
+ IUnknown *m_pin;
+ IReferenceClock *m_clock;
+ IMemAllocator *m_allocator;
+ DirectShowTimedSample *m_head;
+ DirectShowTimedSample *m_tail;
+ int m_maximumSamples;
+ int m_state;
+ REFERENCE_TIME m_startTime;
+ HANDLE m_timeoutEvent;
+ HANDLE m_flushEvent;
+ QSemaphore m_semaphore;
+ QMutex m_mutex;
+};
+
+#endif