Revision control
++ // 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 <QtCore/qcoreevent.h>
++ #include <QtCore/qiodevice.h>
++ #include <QtCore/qmutex.h>
++ #include <QtCore/qpointer.h>
++
++ #include <QtCore/private/qcomobject_p.h>
++ #include <QtCore/private/qcomptr_p.h>
++
++ #include <mfapi.h>
++ #include <mfidl.h>
++
++ QT_BEGIN_NAMESPACE
++
++ class MFStream : public QObject, public QComObjectWithDeleteLater<MFStream, IMFByteStream>
++ {
++ Q_OBJECT
++ public:
++ MFStream(QIODevice *stream, bool ownStream, bool synchronous = false);
++
++ ~MFStream();
++
++ //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 QComObject<IUnknown>
++ {
++ public:
++ AsyncReadState(BYTE *pb, ULONG cb);
++
++ BYTE* pb() const;
++ ULONG cb() const;
++ ULONG bytesRead() const;
++
++ void setBytesRead(ULONG cbRead);
++
++ private:
++ BYTE *m_pb;
++ ULONG m_cb;
++ ULONG m_cbRead;
++ };
++
++ QPointer<QIODevice> m_stream;
++ bool m_ownStream;
++ bool m_synchronous;
++ DWORD m_workQueueId;
++ QMutex m_mutex;
++
++ void doRead();
++ ULONG m_syncReadCount = 0;
++
++ protected:
++ void customEvent(QEvent *event) override;
++ ComPtr<IMFAsyncResult> m_currentReadResult;
++ };
++
++ QT_END_NAMESPACE
++
++ #endif