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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 Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 MFSTREAM_H
#define MFSTREAM_H
#include <mfapi.h>
#include <mfidl.h>
#include <QtCore/qmutex.h>
#include <QtCore/qiodevice.h>
#include <QtCore/qcoreevent.h>
QT_USE_NAMESPACE
class MFStream : public QObject, public IMFByteStream
{
Q_OBJECT
public:
MFStream(QIODevice *stream, bool ownStream);
~MFStream();
//from IUnknown
STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
//from IMFByteStream
STDMETHODIMP GetCapabilities(DWORD *pdwCapabilities);
STDMETHODIMP GetLength(QWORD *pqwLength);
STDMETHODIMP SetLength(QWORD);
STDMETHODIMP GetCurrentPosition(QWORD *pqwPosition);
STDMETHODIMP SetCurrentPosition(QWORD qwPosition);
STDMETHODIMP IsEndOfStream(BOOL *pfEndOfStream);
STDMETHODIMP Read(BYTE *pb, ULONG cb, ULONG *pcbRead);
STDMETHODIMP BeginRead(BYTE *pb, ULONG cb, IMFAsyncCallback *pCallback,
IUnknown *punkState);
STDMETHODIMP EndRead(IMFAsyncResult* pResult, ULONG *pcbRead);
STDMETHODIMP Write(const BYTE *, ULONG, ULONG *);
STDMETHODIMP BeginWrite(const BYTE *, ULONG ,
IMFAsyncCallback *,
IUnknown *);
STDMETHODIMP EndWrite(IMFAsyncResult *,
ULONG *);
STDMETHODIMP Seek(
MFBYTESTREAM_SEEK_ORIGIN SeekOrigin,
LONGLONG llSeekOffset,
DWORD,
QWORD *pqwCurrentPosition);
STDMETHODIMP Flush();
STDMETHODIMP Close();
private:
class AsyncReadState : public IUnknown
{
public:
AsyncReadState(BYTE *pb, ULONG cb);
//from IUnknown
STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
BYTE* pb() const;
ULONG cb() const;
ULONG bytesRead() const;
void setBytesRead(ULONG cbRead);
private:
long m_cRef;
BYTE *m_pb;
ULONG m_cb;
ULONG m_cbRead;
};
long m_cRef;
QIODevice *m_stream;
bool m_ownStream;
DWORD m_workQueueId;
QMutex m_mutex;
void doRead();
private Q_SLOTS:
void handleReadyRead();
protected:
void customEvent(QEvent *event);
IMFAsyncResult *m_currentReadResult;
};
#endif
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