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diff --git a/avmedia/source/macavf/player.mm b/avmedia/source/macavf/player.mm
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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 .
+ */
+
+#include "player.hxx"
+#include "framegrabber.hxx"
+#include "window.hxx"
+#include <rtl/ref.hxx>
+
+#include <cmath> // for log10()
+
+using namespace ::com::sun::star;
+
+@implementation MacAVObserverObject
+
+- (void)observeValueForKeyPath:(NSString*)pKeyPath ofObject:(id)pObject change:(NSDictionary*)pChangeDict context:(void*)pContext
+{
+    (void) pObject;
+    (void) pChangeDict;
+    avmedia::macavf::MacAVObserverHandler* pHandler = static_cast<avmedia::macavf::MacAVObserverHandler*>(pContext);
+    pHandler->handleObservation( pKeyPath );
+}
+
+- (void)onNotification:(NSNotification*)pNotification
+{
+    NSString* pNoteName = [pNotification name];
+    HandlersForObject::iterator it = maHandlersForObject.find( [pNotification object]);
+    if( it != maHandlersForObject.end() )
+        (*it).second->handleObservation( pNoteName );
+}
+
+- (void)setHandlerForObject:(NSObject*)pObject handler:(avmedia::macavf::MacAVObserverHandler*)pHandler
+{
+    maHandlersForObject[ pObject] = pHandler;
+}
+
+- (void)removeHandlerForObject:(NSObject*)pObject
+{
+    maHandlersForObject.erase( pObject);
+}
+
+@end
+
+
+namespace avmedia::macavf {
+
+MacAVObserverObject* MacAVObserverHandler::mpMacAVObserverObject = nullptr;
+
+MacAVObserverObject* MacAVObserverHandler::getObserver()
+{
+    if( !mpMacAVObserverObject)
+    {
+        mpMacAVObserverObject = [MacAVObserverObject alloc];
+        [mpMacAVObserverObject retain];
+    }
+    return mpMacAVObserverObject;
+}
+
+
+Player::Player()
+:   mpPlayer( nullptr )
+,   mfUnmutedVolume( 0 )
+,   mfStopTime( DBL_MAX )
+,   mbMuted( false )
+,   mbLooping( false )
+{}
+
+
+Player::~Player()
+{
+    if( !mpPlayer )
+        return;
+    // remove the observers
+    [mpPlayer removeObserver:getObserver() forKeyPath:@"currentItem.status"];
+    AVPlayerItem* pOldPlayerItem = [mpPlayer currentItem];
+    [[NSNotificationCenter defaultCenter] removeObserver:getObserver()
+        name:AVPlayerItemDidPlayToEndTimeNotification
+        object:pOldPlayerItem];
+    [getObserver() removeHandlerForObject:pOldPlayerItem];
+    // release the AVPlayer
+    CFRelease( mpPlayer );
+}
+
+
+bool Player::handleObservation( NSString* pKeyPath )
+{
+    if( [pKeyPath isEqualToString:AVPlayerItemDidPlayToEndTimeNotification])
+    {
+        if( mbLooping )
+            setMediaTime( 0.0);
+    }
+    return true;
+}
+
+
+bool Player::create( const OUString& rURL )
+{
+    // get the media asset
+    NSString* aNSStr = [NSString stringWithCharacters:reinterpret_cast<unichar const *>(rURL.getStr()) length:rURL.getLength()];
+    SAL_WNODEPRECATED_DECLARATIONS_PUSH
+        //TODO: 10.11 stringByAddingPercentEscapesUsingEncoding
+    NSURL* aNSURL = [NSURL URLWithString: [aNSStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
+    SAL_WNODEPRECATED_DECLARATIONS_POP
+    // get the matching AVPlayerItem
+    AVPlayerItem* pPlayerItem = [AVPlayerItem playerItemWithURL:aNSURL];
+
+    // create or update the AVPlayer with the new AVPlayerItem
+    if( !mpPlayer )
+    {
+        mpPlayer = [AVPlayer playerWithPlayerItem:pPlayerItem];
+        CFRetain( mpPlayer );
+        [mpPlayer setActionAtItemEnd:AVPlayerActionAtItemEndNone];
+    }
+    else
+    {
+        // remove the obsoleted observers
+        AVPlayerItem* pOldPlayerItem = [mpPlayer currentItem];
+        [mpPlayer removeObserver:getObserver() forKeyPath:@"currentItem.status"];
+        [getObserver() removeHandlerForObject:pOldPlayerItem];
+        [[NSNotificationCenter defaultCenter] removeObserver:getObserver()
+            name:AVPlayerItemDidPlayToEndTimeNotification
+            object:pOldPlayerItem];
+        // replace the playeritem
+        [mpPlayer replaceCurrentItemWithPlayerItem:pPlayerItem];
+    }
+
+    // observe the status of the current player item
+    [mpPlayer addObserver:getObserver() forKeyPath:@"currentItem.status" options:0 context:this];
+
+    // observe playback-end needed for playback looping
+    [[NSNotificationCenter defaultCenter] addObserver:getObserver()
+        selector:@selector(onNotification:)
+        name:AVPlayerItemDidPlayToEndTimeNotification
+        object:pPlayerItem];
+    [getObserver() setHandlerForObject:pPlayerItem handler:this];
+
+    return true;
+}
+
+
+void SAL_CALL Player::start()
+{
+    if( !mpPlayer )
+        return;
+
+    [mpPlayer play];
+    // else // TODO: delay until it becomes ready
+}
+
+
+void SAL_CALL Player::stop()
+{
+    if( !mpPlayer )
+        return;
+    const bool bPlaying = isPlaying();
+    if( bPlaying )
+        [mpPlayer pause];
+}
+
+
+sal_Bool SAL_CALL Player::isPlaying()
+{
+    if( !mpPlayer )
+        return false;
+    const float fRate = [mpPlayer rate];
+    return (fRate != 0.0);
+}
+
+
+double SAL_CALL Player::getDuration()
+{
+    // slideshow checks for non-zero duration, so cheat here
+    double duration = 0.01;
+
+    if( mpPlayer )
+    {
+        AVPlayerItem* pItem = [mpPlayer currentItem];
+        if( [pItem status] == AVPlayerItemStatusReadyToPlay )
+            duration = CMTimeGetSeconds( [pItem duration] );
+        else // fall back to AVAsset's best guess
+            duration = CMTimeGetSeconds( [[pItem asset] duration] );
+    }
+
+    return duration;
+}
+
+
+void SAL_CALL Player::setMediaTime( double fTime )
+{
+    if( mpPlayer )
+        [mpPlayer seekToTime: CMTimeMakeWithSeconds(fTime,1000) ];
+}
+
+
+double SAL_CALL Player::getMediaTime()
+{
+    if( !mpPlayer )
+        return 0.0;
+
+    const double position = CMTimeGetSeconds( [mpPlayer currentTime] );
+    if( position >= mfStopTime )
+        if( isPlaying() )
+            stop();
+
+    return position;
+}
+
+
+void Player::setStopTime( double fTime )
+{
+    mfStopTime = fTime;
+}
+
+
+double Player::getStopTime()
+{
+    return mfStopTime;
+}
+
+
+void SAL_CALL Player::setPlaybackLoop( sal_Bool bSet )
+{
+    mbLooping = bSet;
+}
+
+
+sal_Bool SAL_CALL Player::isPlaybackLoop()
+{
+    return mbLooping;
+}
+
+
+void SAL_CALL Player::setMute( sal_Bool bSet )
+{
+    if( !mpPlayer )
+        return;
+
+    mbMuted = bSet;
+    [mpPlayer setMuted:mbMuted];
+}
+
+
+sal_Bool SAL_CALL Player::isMute()
+{
+    return mbMuted;
+}
+
+
+void SAL_CALL Player::setVolumeDB( sal_Int16 nVolumeDB )
+{
+    // -40dB <-> AVPlayer volume 0.0
+    //   0dB <-> AVPlayer volume 1.0
+    mfUnmutedVolume = (nVolumeDB <= -40) ? 0.0 : pow( 10.0, nVolumeDB / 20.0 );
+
+    // change volume
+    if( !mbMuted && mpPlayer )
+        [mpPlayer setVolume:mfUnmutedVolume];
+}
+
+
+sal_Int16 SAL_CALL Player::getVolumeDB()
+{
+    if( !mpPlayer )
+        return 0;
+
+    // get the actual volume
+    const float fVolume = [mpPlayer volume];
+
+    // convert into Decibel value
+    // -40dB <-> AVPlayer volume 0.0
+    //   0dB <-> AVPlayer volume 1.0
+    const int nVolumeDB = (fVolume <= 0) ? -40 : lrint( 20.0*log10(fVolume));
+
+    return static_cast<sal_Int16>(nVolumeDB);
+}
+
+
+awt::Size SAL_CALL Player::getPreferredPlayerWindowSize()
+{
+    awt::Size aSize( 0, 0 ); // default size
+
+    AVAsset* pMovie = [[mpPlayer currentItem] asset];
+    NSArray* pVideoTracks = [pMovie tracksWithMediaType:AVMediaTypeVideo];
+    if ([pVideoTracks count] > 0)
+    {
+        AVAssetTrack* pFirstVideoTrack = static_cast<AVAssetTrack*>([pVideoTracks objectAtIndex:0]);
+        const CGSize aPrefSize = [pFirstVideoTrack naturalSize];
+        aSize = awt::Size( aPrefSize.width, aPrefSize.height );
+    }
+
+    return aSize;
+}
+
+
+uno::Reference< ::media::XPlayerWindow > SAL_CALL Player::createPlayerWindow( const uno::Sequence< uno::Any >& aArguments )
+{
+    // get the preferred window size
+    const awt::Size aSize( getPreferredPlayerWindowSize() );
+
+    // get the parent view
+    sal_IntPtr nNSViewPtr = 0;
+    aArguments[0] >>= nNSViewPtr;
+    NSView* pParentView = reinterpret_cast<NSView*>(nNSViewPtr);
+
+    // check the window parameters
+    if( (aSize.Width <= 0) || (aSize.Height <= 0) || (pParentView == nullptr) )
+         return {};
+
+    // create the window
+    return new ::avmedia::macavf::Window( *this, pParentView );
+}
+
+
+uno::Reference< media::XFrameGrabber > SAL_CALL Player::createFrameGrabber()
+{
+    rtl::Reference<FrameGrabber> pGrabber = new FrameGrabber();
+    AVAsset* pMovie = [[mpPlayer currentItem] asset];
+    if( !pGrabber->create( pMovie ) )
+        return {};
+
+    return pGrabber;
+}
+
+
+OUString SAL_CALL Player::getImplementationName(  )
+{
+    return AVMEDIA_MACAVF_PLAYER_IMPLEMENTATIONNAME;
+}
+
+
+sal_Bool SAL_CALL Player::supportsService( const OUString& ServiceName )
+{
+    return ServiceName == AVMEDIA_MACAVF_PLAYER_SERVICENAME;
+}
+
+
+uno::Sequence< OUString > SAL_CALL Player::getSupportedServiceNames(  )
+{
+    return { AVMEDIA_MACAVF_PLAYER_SERVICENAME };
+}
+
+} // namespace avmedia::macavf
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */