内存泄漏使用SharpDX使用MediaSession播放视频

我遭遇了一次内存泄漏,到目前为止,我追踪它的运气是零。它似乎与释放拓扑有关。

基本上我有一个视频播放器,可以有多种拓扑连接到它。每次调用play时,我都会重新创建拓扑(使用activate objects for audio and video),如下所示:

    private Topology BuildTopology( TimeSpan startTime, TimeSpan endTime, IntPtr hWnd )
    {
        if ( _topology != null )
        {
            _topology.Dispose();
            _topology   = null;
        }

        MediaFactory.CreateTopology( out _topology );

        SharpDX.MediaFoundation.MediaSource mediaSource;
        {
            SourceResolver resolver = new SourceResolver();

            ObjectType otype;
            ComObject source = (ComObject)resolver.CreateObjectFromURL(FileName, SourceResolverFlags.MediaSource, null, out otype);
            mediaSource = source.QueryInterface<SharpDX.MediaFoundation.MediaSource>();
            resolver.Dispose();
            source.Dispose();
        }

        PresentationDescriptor presDesc;
        mediaSource.CreatePresentationDescriptor(out presDesc);

        for (var i = 0; i < presDesc.StreamDescriptorCount; i++)
        {
            SharpDX.Mathematics.Interop.RawBool selected;
            StreamDescriptor desc;
            presDesc.GetStreamDescriptorByIndex(i, out selected, out desc);

            if (selected)
            {
                var majorType = desc.MediaTypeHandler.MajorType;

                TopologyNode sourceNode;
                MediaFactory.CreateTopologyNode( TopologyType.SourceStreamNode, out sourceNode );

                sourceNode.Set( TopologyNodeAttributeKeys.Source, mediaSource );
                sourceNode.Set( TopologyNodeAttributeKeys.PresentationDescriptor, presDesc );
                sourceNode.Set( TopologyNodeAttributeKeys.StreamDescriptor, desc );

                if ( startTime != TimeSpan.Zero )
                    sourceNode.Set( TopologyNodeAttributeKeys.Mediastart, startTime.Ticks );
                if ( endTime != TimeSpan.Zero )
                    sourceNode.Set( TopologyNodeAttributeKeys.Mediastop, endTime.Ticks );

                TopologyNode outputNode;
                MediaFactory.CreateTopologyNode(TopologyType.OutputNode, out outputNode);


                if (majorType == MediaTypeGuids.Video)
                {
                    Activate activate;
                    MediaFactory.CreateVideoRendererActivate( hWnd, out activate );
                    outputNode.Object = activate;


                    IsVideo = true;
                }

                if (majorType == MediaTypeGuids.Audio)
                {
                    Activate activate;
                    MediaFactory.CreateAudioRendererActivate( out activate );
                    //activate.Dispose();

                    outputNode.Object = activate;
                }

                outputNode.Set( TopologyNodeAttributeKeys.NoshutdownOnRemove, false );

                _topology.AddNode( sourceNode );
                _topology.AddNode( outputNode );
                sourceNode.ConnectOutput( 0, outputNode, 0 );

                sourceNode.Dispose();
                outputNode.Dispose();
            }

            desc.Dispose();
        }

        presDesc.Dispose();
        mediaSource.Dispose();
        return _topology;
    }

奇怪的是,尽管每次确保前一个拓扑已被释放,但我都会得到一个内存泄漏,这个泄漏会慢慢累积,直到我的应用程序抛出内存不足错误。

我的游戏功能如下:

    private void Play( TimeSpan ts )
    {
        if (State != MediaState.Stopped)
        {
            _session.Stop();
            _clock.Dispose();
        }

        // Set the new song.
        _session.SetTopology( SessionSetTopologyFlags.ClearCurrent, null );
        //_session.ClearTopologies();
        _session.SetTopology( SessionSetTopologyFlags.Immediate, _currentVideo.Topology );

        // Get the clock.
        _clock = _session.Clock.QueryInterface< PresentationClock >();

        // Start playing.
        var varStart = new Variant();
        varStart.Value  = (long)ts.Ticks;
        _session.Start( null, varStart );
    }

我已经打开了“EnableObjectTracking”和“UseThreadStaticObjectTracking”,但是没有对象的生成。只有我的会话和上次播放的拓扑出现过。

有趣的是,在我打开“EnableReleaseOnFinalizer”之前,内存leajk要快得多。现在它需要几百个播放周期来耗尽内存,这是一个巨大的进步,但仍然对我没有好处。

有人知道我做错了什么吗?这让我有点发疯。应用程序已经准备好,除了这个内存泄漏,我不能释放与这个问题在那里。

编辑 :我应该补充一点,这似乎与视频有关,因为当我播放音频文件而不是视频时,似乎没有内存泄漏(或者相比之下它非常小)。