5e801e2793
As in the past, to avoid rewriting various autotests that contain line-number information, an extra blank line has been inserted at the end of the license text to ensure that this commit does not change the total number of lines in the license header. Change-Id: I20e5215108c6ebd5f8474fed5c3665118e4791e6 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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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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**
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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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