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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef MFSTREAM_H
#define MFSTREAM_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <mfapi.h>
#include <mfidl.h>
#include <QtCore/qmutex.h>
#include <QtCore/qiodevice.h>
#include <QtCore/qcoreevent.h>
#include <QtCore/qpointer.h>
QT_BEGIN_NAMESPACE
class MFStream : public QObject, public IMFByteStream
{
Q_OBJECT
public:
MFStream(QIODevice *stream, bool ownStream);
~MFStream();
//from IUnknown
STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject) override;
STDMETHODIMP_(ULONG) AddRef(void) override;
STDMETHODIMP_(ULONG) Release(void) override;
//from IMFByteStream
STDMETHODIMP GetCapabilities(DWORD *pdwCapabilities) override;
STDMETHODIMP GetLength(QWORD *pqwLength) override;
STDMETHODIMP SetLength(QWORD) override;
STDMETHODIMP GetCurrentPosition(QWORD *pqwPosition) override;
STDMETHODIMP SetCurrentPosition(QWORD qwPosition) override;
STDMETHODIMP IsEndOfStream(BOOL *pfEndOfStream) override;
STDMETHODIMP Read(BYTE *pb, ULONG cb, ULONG *pcbRead) override;
STDMETHODIMP BeginRead(BYTE *pb, ULONG cb, IMFAsyncCallback *pCallback,
IUnknown *punkState) override;
STDMETHODIMP EndRead(IMFAsyncResult* pResult, ULONG *pcbRead) override;
STDMETHODIMP Write(const BYTE *, ULONG, ULONG *) override;
STDMETHODIMP BeginWrite(const BYTE *, ULONG ,
IMFAsyncCallback *,
IUnknown *) override;
STDMETHODIMP EndWrite(IMFAsyncResult *,
ULONG *) override;
STDMETHODIMP Seek(
MFBYTESTREAM_SEEK_ORIGIN SeekOrigin,
LONGLONG llSeekOffset,
DWORD,
QWORD *pqwCurrentPosition) override;
STDMETHODIMP Flush() override;
STDMETHODIMP Close() override;
private:
class AsyncReadState : public IUnknown
{
public:
AsyncReadState(BYTE *pb, ULONG cb);
virtual ~AsyncReadState() = default;
//from IUnknown
STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject) override;
STDMETHODIMP_(ULONG) AddRef(void) override;
STDMETHODIMP_(ULONG) Release(void) override;
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;
QPointer<QIODevice> m_stream;
bool m_ownStream;
DWORD m_workQueueId;
QMutex m_mutex;
void doRead();
private Q_SLOTS:
void handleReadyRead();
protected:
void customEvent(QEvent *event) override;
IMFAsyncResult *m_currentReadResult;
};
QT_END_NAMESPACE
#endif
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