fdac892bbc
Docs still need some fixing, but there are some legitimate usages of it there. Change-Id: I94c7b68788ce97829711a4384884d7e52fe84162 Reviewed-on: http://codereview.qt.nokia.com/1736 Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef DIRECTSHOWIOREADER_H
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#define DIRECTSHOWIOREADER_H
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#include <QtCore/qmutex.h>
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#include <QtCore/qobject.h>
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#include <QtCore/qwaitcondition.h>
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#include <dshow.h>
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QT_BEGIN_NAMESPACE
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class QIODevice;
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QT_END_NAMESPACE
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class DirectShowEventLoop;
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class DirectShowIOSource;
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class DirectShowSampleRequest;
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class DirectShowIOReader : public QObject, public IAsyncReader
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{
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Q_OBJECT
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public:
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DirectShowIOReader(QIODevice *device, DirectShowIOSource *source, DirectShowEventLoop *loop);
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~DirectShowIOReader();
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// IUnknown
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HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject);
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ULONG STDMETHODCALLTYPE AddRef();
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ULONG STDMETHODCALLTYPE Release();
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// IAsyncReader
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HRESULT STDMETHODCALLTYPE RequestAllocator(
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IMemAllocator *pPreferred, ALLOCATOR_PROPERTIES *pProps, IMemAllocator **ppActual);
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HRESULT STDMETHODCALLTYPE Request(IMediaSample *pSample, DWORD_PTR dwUser);
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HRESULT STDMETHODCALLTYPE WaitForNext(
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DWORD dwTimeout, IMediaSample **ppSample, DWORD_PTR *pdwUser);
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HRESULT STDMETHODCALLTYPE SyncReadAligned(IMediaSample *pSample);
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HRESULT STDMETHODCALLTYPE SyncRead(LONGLONG llPosition, LONG lLength, BYTE *pBuffer);
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HRESULT STDMETHODCALLTYPE Length(LONGLONG *pTotal, LONGLONG *pAvailable);
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HRESULT STDMETHODCALLTYPE BeginFlush();
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HRESULT STDMETHODCALLTYPE EndFlush();
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protected:
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void customEvent(QEvent *event);
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private Q_SLOTS:
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void readyRead();
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private:
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HRESULT blockingRead(LONGLONG position, LONG length, BYTE *buffer, qint64 *bytesRead);
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bool nonBlockingRead(
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LONGLONG position, LONG length, BYTE *buffer, qint64 *bytesRead, HRESULT *result);
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void flushRequests();
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DirectShowIOSource *m_source;
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QIODevice *m_device;
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DirectShowEventLoop *m_loop;
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DirectShowSampleRequest *m_pendingHead;
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DirectShowSampleRequest *m_pendingTail;
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DirectShowSampleRequest *m_readyHead;
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DirectShowSampleRequest *m_readyTail;
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LONGLONG m_synchronousPosition;
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LONG m_synchronousLength;
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qint64 m_synchronousBytesRead;
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BYTE *m_synchronousBuffer;
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HRESULT m_synchronousResult;
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LONGLONG m_totalLength;
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LONGLONG m_availableLength;
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bool m_flushing;
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QMutex m_mutex;
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QWaitCondition m_wait;
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};
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#endif
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