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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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