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diff --git a/slideshow/source/inc/soundplayer.hxx b/slideshow/source/inc/soundplayer.hxx
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+++ b/slideshow/source/inc/soundplayer.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_INC_SOUNDPLAYER_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_INC_SOUNDPLAYER_HXX
+
+#include <rtl/ustring.hxx>
+
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/media/XPlayer.hpp>
+#include <avmedia/mediaitem.hxx>
+
+#include <memory>
+
+#include "pauseeventhandler.hxx"
+#include "disposable.hxx"
+#include "eventmultiplexer.hxx"
+
+
+/* Definition of SoundPlayer class */
+
+namespace slideshow::internal
+    {
+        class MediaFileManager;
+
+        /** Little class that plays a sound from a URL.
+            TODO:
+            Must be explicitly disposed (as long as enable_shared_ptr_from_this
+            isn't available)!
+         */
+        class SoundPlayer : public PauseEventHandler,
+                            public Disposable
+        {
+        public:
+            /** Create a sound player object.
+
+                @param rSoundURL
+                URL to a sound file.
+
+                @param rComponentContext
+                Reference to a component context, used to create the
+                needed services
+
+                @throws css::lang::NoSupportException, if
+                the sound file is invalid, or not supported by the
+                player service.
+             */
+            static ::std::shared_ptr<SoundPlayer> create(
+                EventMultiplexer & rEventMultiplexer,
+                const OUString& rSoundURL,
+                const css::uno::Reference< css::uno::XComponentContext>& rComponentContext,
+                MediaFileManager& rMediaFileManager);
+
+            virtual ~SoundPlayer() override;
+
+            /** Query duration of sound playback.
+
+                If the sound is already playing, this method
+                returns the remaining playback time.
+
+                @return the playback duration in seconds.
+             */
+            double getDuration() const;
+
+            bool startPlayback();
+            bool stopPlayback();
+            bool isPlaying() const;
+
+            void setPlaybackLoop( bool bLoop );
+
+            // PauseEventHandler:
+            virtual bool handlePause( bool bPauseShow ) override;
+
+            // Disposable
+            virtual void dispose() override;
+
+        private:
+            SoundPlayer(
+                EventMultiplexer & rEventMultiplexer,
+                const OUString& rSoundURL,
+                const css::uno::Reference< css::uno::XComponentContext>& rComponentContext,
+                MediaFileManager & rMediaFileManager);
+
+            EventMultiplexer & mrEventMultiplexer;
+            // TODO(Q3): obsolete when boost::enable_shared_ptr_from_this
+            //           is available
+            ::std::shared_ptr<SoundPlayer> mThis;
+            // Temp file for package url.
+            ::std::shared_ptr<::avmedia::MediaTempFile> mpMediaTempFile;
+            css::uno::Reference< css::media::XPlayer > mxPlayer;
+        };
+
+        typedef ::std::shared_ptr< SoundPlayer > SoundPlayerSharedPtr;
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_SOUNDPLAYER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */