2732e23887
- Renamed LICENSE.LGPL to LICENSE.LGPLv21 - Added LICENSE.LGPLv3 & LICENSE.GPLv2 - Removed LICENSE.GPL Change-Id: Ied06887225df341064c12bcc14c259ae74116f2e Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>
113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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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, Digia gives you certain additional
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** rights. These rights are described in the Digia 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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** $QT_END_LICENSE$
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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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