qwindowsresampler_p.h

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// Copyright (C) 2021 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 QT_QWINDOWSRESAMPLER_H
#define QT_QWINDOWSRESAMPLER_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 <qbytearray.h>
#include <qbytearrayview.h>
#include <qaudioformat.h>
#include <private/qcomptr_p.h>
#include <qt_windows.h>
#include <mftransform.h>
 
struct IMFSample;
struct IMFTransform;
 
QT_BEGIN_NAMESPACE
 
class QWindowsMediaFoundation;
 
class Q_MULTIMEDIA_EXPORT QWindowsResampler
{
public:
    QWindowsResampler();
    ~QWindowsResampler();
 
    bool setup(const QAudioFormat &in, const QAudioFormat &out);
 
    QByteArray resample(const QByteArrayView &in);
    QByteArray resample(IMFSample *sample);
 
    QAudioFormat inputFormat() const { return m_inputFormat; }
    QAudioFormat outputFormat() const { return m_outputFormat; }
 
    quint64 outputBufferSize(quint64 inputBufferSize) const;
    quint64 inputBufferSize(quint64 outputBufferSize) const;
 
    quint64 totalInputBytes() const { return m_totalInputBytes; }
    quint64 totalOutputBytes() const { return m_totalOutputBytes; }
 
private:
    HRESULT processInput(const QByteArrayView &in);
    HRESULT processOutput(QByteArray &out);
 
    ComPtr<IMFTransform> m_resampler;
    QWindowsMediaFoundation *m_wmf = nullptr;
 
    bool m_resamplerNeedsSampleBuffer = false;
    quint64 m_totalInputBytes = 0;
    quint64 m_totalOutputBytes = 0;
    QAudioFormat m_inputFormat;
    QAudioFormat m_outputFormat;
 
    DWORD m_inputStreamID = 0;
};
 
QT_END_NAMESPACE
 
#endif // QT_QWINDOWSRESAMPLER_H