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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/qwindowsiupointer_p.h>
#include <qt_windows.h>
#include <mftransform.h>
struct IMFSample;
struct IMFTransform;
class QWindowsMediaFoundation;
QT_BEGIN_NAMESPACE
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);
QWindowsIUPointer<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
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