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diff --git a/src/multimedia/audio/qaudiostatemachineutils_p.h b/src/multimedia/audio/qaudiostatemachineutils_p.h
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index 000000000..f80517f77
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+++ b/src/multimedia/audio/qaudiostatemachineutils_p.h
@@ -0,0 +1,96 @@
+// Copyright (C) 2023 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 QAUDIOSTATEMACHINEUTILS_P_H
+#define QAUDIOSTATEMACHINEUTILS_P_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 "qaudio.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace AudioStateMachineUtils {
+
+using RawState = int;
+
+constexpr uint32_t AudioStateBitsCount = 8;
+constexpr RawState AudioStateMask = 0xFF;
+constexpr RawState AudioErrorMask = 0xFF00;
+constexpr RawState DrainingFlag = 0x10000;
+
+static_assert(!(AudioStateMask & DrainingFlag) && !(AudioStateMask & AudioErrorMask)
+                      && !(AudioErrorMask & DrainingFlag),
+              "Invalid masks");
+
+constexpr bool isDrainingState(RawState state)
+{
+    return (state & DrainingFlag) != 0;
+}
+
+constexpr RawState addDrainingFlag(RawState state)
+{
+    return state | DrainingFlag;
+}
+
+constexpr RawState removeDrainingFlag(RawState state)
+{
+    return state & ~DrainingFlag;
+}
+
+constexpr QAudio::State toAudioState(RawState state)
+{
+    return QAudio::State(state & AudioStateMask);
+}
+
+constexpr QAudio::Error toAudioError(RawState state)
+{
+    return QAudio::Error((state & AudioErrorMask) >> AudioStateBitsCount);
+}
+
+constexpr RawState toRawState(QAudio::State state, QAudio::Error error = QAudio::NoError)
+{
+    return state | (error << AudioStateBitsCount);
+}
+
+constexpr RawState setStateError(RawState state, QAudio::Error error)
+{
+    return (error << AudioStateBitsCount) | (state & ~AudioErrorMask);
+}
+
+template <typename... States>
+constexpr auto makeStatesChecker(States... states)
+{
+    return [=](RawState state) {
+        state &= (AudioStateMask | DrainingFlag);
+        return (... || (state == states));
+    };
+}
+
+// ensures compareExchange (testAndSet) operation with opportunity
+// to check several states, can be considered as atomic
+template <typename T, typename Predicate, typename NewValueGetter>
+bool multipleCompareExchange(std::atomic<T> &target, T &prevValue, Predicate predicate,
+                             NewValueGetter newValueGetter)
+{
+    while (predicate(prevValue))
+        if (target.compare_exchange_strong(prevValue, newValueGetter(prevValue),
+                                           std::memory_order_acq_rel))
+            return true;
+
+    return false;
+}
+} // namespace AudioStateMachineUtils
+
+QT_END_NAMESPACE
+
+#endif // QAUDIOSTATEMACHINEUTILS_P_H