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diff --git a/src/multimedia/darwin/qcoreaudiosessionmanager_p.h b/src/multimedia/darwin/qcoreaudiosessionmanager_p.h
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+++ b/src/multimedia/darwin/qcoreaudiosessionmanager_p.h
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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 IOSAUDIOSESSIONMANAGER_H
+#define IOSAUDIOSESSIONMANAGER_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 <QObject>
+#ifdef QT_DEBUG_COREAUDIO
+# include <QtCore/QDebug>
+#endif
+
+@class CoreAudioSessionObserver;
+
+QT_BEGIN_NAMESPACE
+
+class CoreAudioSessionManager : public QObject
+{
+    Q_OBJECT
+public:
+    enum AudioSessionCategorys {
+        Ambient,
+        SoloAmbient,
+        Playback,
+        Record,
+        PlayAndRecord,
+        AudioProcessing,
+        MultiRoute
+    };
+    enum AudioSessionCategoryOptions {
+        None = 0,
+        MixWithOthers = 1,
+        DuckOthers = 2,
+        AllowBluetooth = 4,
+        DefaultToSpeaker = 8
+    };
+    enum AudioSessionModes {
+        Default,
+        VoiceChat,
+        GameChat,
+        VideoRecording,
+        Measurement,
+        MoviePlayback
+    };
+
+    static CoreAudioSessionManager& instance();
+
+    bool setActive(bool active);
+    bool setCategory(AudioSessionCategorys category, AudioSessionCategoryOptions options = None);
+    bool setMode(AudioSessionModes mode);
+
+    AudioSessionCategorys category();
+    AudioSessionModes mode();
+
+    QList<QByteArray> inputDevices();
+    QList<QByteArray> outputDevices();
+
+    float currentIOBufferDuration();
+    float preferredSampleRate();
+
+signals:
+    void activeChanged();
+    void categoryChanged();
+    void modeChanged();
+    void routeChanged();
+    void devicesAvailableChanged();
+
+private:
+    CoreAudioSessionManager();
+    ~CoreAudioSessionManager();
+    CoreAudioSessionManager(CoreAudioSessionManager const &copy);
+    CoreAudioSessionManager& operator =(CoreAudioSessionManager const &copy);
+
+    CoreAudioSessionObserver *m_sessionObserver;
+};
+
+#ifdef QT_DEBUG_COREAUDIO
+QDebug operator <<(QDebug dbg, CoreAudioSessionManager::AudioSessionCategorys category);
+QDebug operator <<(QDebug dbg, CoreAudioSessionManager::AudioSessionCategoryOptions option);
+QDebug operator <<(QDebug dbg, CoreAudioSessionManager::AudioSessionModes mode);
+#endif
+
+QT_END_NAMESPACE
+
+#endif // IOSAUDIOSESSIONMANAGER_H