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diff --git a/slideshow/source/engine/activities/activityparameters.hxx b/slideshow/source/engine/activities/activityparameters.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACTIVITYPARAMETERS_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACTIVITYPARAMETERS_HXX
+
+#include <event.hxx>
+#include <eventqueue.hxx>
+#include <expressionnode.hxx>
+#include <wakeupevent.hxx>
+
+#include <optional>
+#include <vector>
+
+namespace slideshow {
+namespace internal {
+
+/** Parameter struct for animation activities
+
+    This struct contains all common parameters needed to
+    initialize the activities generated by the ActivityFactory.
+*/
+struct ActivityParameters
+{
+    /** Create
+
+        @param rEndEvent
+        Event to be fired, when the activity ends.
+
+        @param rEventQueue
+        Queue to add end event to
+
+        @param nMinDuration
+        Minimal duration of the activity (might actually be
+        longer because of nMinNumberOfFrames). Note that this
+        duration must always be the <em>simple</em> duration,
+        i.e. without any repeat.
+
+        @param rRepeats
+        Number of repeats. If this parameter is invalid,
+        infinite repeat is assumed.
+
+        @param nAccelerationFraction
+        Value between 0 and 1, denoting the fraction of the
+        total simple duration, which the animation should
+        accelerate.
+
+        @param nDecelerationFraction
+        Value between 0 and 1, denoting the fraction of the
+        total simple duration, which the animation should
+        decelerate. Note that the ranges
+        [0,nAccelerationFraction] and
+        [nDecelerationFraction,1] must be non-overlapping!
+
+        @param bAutoReverse
+        When true, at the end of the simple duration, the
+        animation plays reversed to the start value. Note that
+        nMinDuration still specifies the simple duration,
+        i.e. when bAutoReverse is true, the implicit duration
+        doubles.
+    */
+    ActivityParameters(
+        const EventSharedPtr&                       rEndEvent,
+        EventQueue&                                 rEventQueue,
+        ActivitiesQueue&                            rActivitiesQueue,
+        double                                      nMinDuration,
+        ::std::optional<double> const&            rRepeats,
+        double                                      nAccelerationFraction,
+        double                                      nDecelerationFraction,
+        sal_uInt32                                  nMinNumberOfFrames,
+        bool                                        bAutoReverse )
+        : mrEndEvent( rEndEvent ),
+          mpWakeupEvent(),
+          mrEventQueue( rEventQueue ),
+          mrActivitiesQueue( rActivitiesQueue ),
+          mpFormula(),
+          maDiscreteTimes(),
+          mnMinDuration( nMinDuration ),
+          mrRepeats( rRepeats ),
+          mnAccelerationFraction( nAccelerationFraction ),
+          mnDecelerationFraction( nDecelerationFraction ),
+          mnMinNumberOfFrames( nMinNumberOfFrames ),
+          mbAutoReverse( bAutoReverse ) {}
+
+    /// End event to fire, when activity is over
+    const EventSharedPtr&                       mrEndEvent;
+    /// Wakeup event to use for discrete activities
+    WakeupEventSharedPtr                        mpWakeupEvent;
+
+    /// EventQueue to add events to
+    EventQueue&                                 mrEventQueue;
+
+    /// ActivitiesQueue to add events to
+    ActivitiesQueue&                            mrActivitiesQueue;
+
+    /// Optional formula
+    std::shared_ptr<ExpressionNode>                     mpFormula;
+
+    /// Key times, for discrete and key time activities
+    ::std::vector< double >                     maDiscreteTimes;
+
+    /// Total duration of activity (including all repeats)
+    const double                                mnMinDuration;
+    ::std::optional<double> const&            mrRepeats;
+    const double                                mnAccelerationFraction;
+    const double                                mnDecelerationFraction;
+
+    /// Minimal number of frames this activity must render
+    const sal_uInt32                            mnMinNumberOfFrames;
+
+    /// When true, activity is played reversed after mnDuration.
+    const bool                                  mbAutoReverse;
+};
+
+} // namespace internal
+} // namespace presentation
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACTIVITYPARAMETERS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */