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diff --git a/package/inc/ZipOutputStream.hxx b/package/inc/ZipOutputStream.hxx
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+++ b/package/inc/ZipOutputStream.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_PACKAGE_INC_ZIPOUTPUTSTREAM_HXX
+#define INCLUDED_PACKAGE_INC_ZIPOUTPUTSTREAM_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/io/XOutputStream.hpp>
+
+#include "ByteChucker.hxx"
+#include <comphelper/threadpool.hxx>
+
+#include <cstddef>
+#include <vector>
+
+struct ZipEntry;
+class ZipOutputEntry;
+class ZipOutputEntryInThread;
+class ZipPackageStream;
+
+class ZipOutputStream
+{
+    css::uno::Reference< css::io::XOutputStream > m_xStream;
+    ::std::vector < ZipEntry * > m_aZipList;
+    std::shared_ptr<comphelper::ThreadTaskTag> mpThreadTaskTag;
+
+    ByteChucker         m_aChucker;
+    ZipEntry            *m_pCurrentEntry;
+    std::vector< ZipOutputEntryInThread* > m_aEntries;
+    std::exception_ptr m_aDeflateException;
+
+public:
+    ZipOutputStream(
+        const css::uno::Reference< css::io::XOutputStream > &xOStream );
+    ~ZipOutputStream();
+
+    void addDeflatingThreadTask( ZipOutputEntryInThread *pEntry, std::unique_ptr<comphelper::ThreadTask> pThreadTask );
+
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void writeLOC( ZipEntry *pEntry, bool bEncrypt = false );
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void rawWrite( const css::uno::Sequence< sal_Int8 >& rBuffer );
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void rawCloseEntry( bool bEncrypt = false );
+
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void finish();
+    const css::uno::Reference< css::io::XOutputStream >& getStream() const;
+
+    static sal_uInt32 getCurrentDosTime();
+    static void setEntry( ZipEntry *pEntry );
+
+private:
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void writeEND(sal_uInt32 nOffset, sal_uInt32 nLength);
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void writeCEN( const ZipEntry &rEntry );
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    void writeEXT( const ZipEntry &rEntry );
+
+    // ScheduledThread handling helpers
+    void consumeScheduledThreadTaskEntry(std::unique_ptr<ZipOutputEntryInThread> pCandidate);
+    void consumeFinishedScheduledThreadTaskEntries();
+
+public:
+    void reduceScheduledThreadTasksToGivenNumberOrLess(
+        std::size_t nThreadTasks);
+
+    const std::shared_ptr<comphelper::ThreadTaskTag>& getThreadTaskTag() const { return mpThreadTaskTag; }
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */