4 files changed, 25 insertions, 7 deletions
diff --git a/src/3rdparty/phonon/ds9/backend.cpp b/src/3rdparty/phonon/ds9/backend.cpp
index 6ed0145..fbc4bdc 100644
--- a/src/3rdparty/phonon/ds9/backend.cpp
+++ b/src/3rdparty/phonon/ds9/backend.cpp
@@ -41,6 +41,8 @@ namespace Phonon
 {
     namespace DS9
     {
+        QMutex *Backend::directShowMutex = 0;
+
         bool Backend::AudioMoniker::operator==(const AudioMoniker &other)
         {
             return other->IsEqual(*this) == S_OK;
@@ -50,6 +52,8 @@ namespace Phonon
         Backend::Backend(QObject *parent, const QVariantList &)
             : QObject(parent)
         {
+            directShowMutex = &m_directShowMutex;
+
             ::CoInitialize(0);
 
             //registering meta types
@@ -62,11 +66,8 @@ namespace Phonon
             m_audioOutputs.clear();
             m_audioEffects.clear();
             ::CoUninitialize();
-        }
 
-        QMutex *Backend::directShowMutex()
-        {
-            return &qobject_cast<Backend*>(qt_plugin_instance())->m_directShowMutex;
+            directShowMutex = 0;
         }
 
         QObject *Backend::createObject(BackendInterface::Class c, QObject *parent, const QList<QVariant> &args)
diff --git a/src/3rdparty/phonon/ds9/backend.h b/src/3rdparty/phonon/ds9/backend.h
index 8b020c2..7c3c109 100644
--- a/src/3rdparty/phonon/ds9/backend.h
+++ b/src/3rdparty/phonon/ds9/backend.h
@@ -64,7 +64,7 @@ namespace Phonon
 
             Filter getAudioOutputFilter(int index) const;
 
-            static QMutex *directShowMutex();
+            static QMutex *directShowMutex;
 
         Q_SIGNALS:
             void objectDescriptionChanged(ObjectDescriptionType);
diff --git a/src/3rdparty/phonon/ds9/backendnode.cpp b/src/3rdparty/phonon/ds9/backendnode.cpp
index 855357a..3afcafa 100644
--- a/src/3rdparty/phonon/ds9/backendnode.cpp
+++ b/src/3rdparty/phonon/ds9/backendnode.cpp
@@ -58,7 +58,24 @@ namespace Phonon
         BackendNode::~BackendNode()
         {
             //this will remove the filter from the graph
-            mediaObjectDestroyed();
+            FILTER_INFO info;
+            for(int i = 0; i < FILTER_COUNT; ++i) {
+                const Filter &filter = m_filters[i];
+                if (!filter)
+                    continue;
+                filter->QueryFilterInfo(&info);
+                if (info.pGraph) {
+                    HRESULT hr = info.pGraph->RemoveFilter(filter);
+
+                    if (hr == VFW_E_NOT_STOPPED && m_mediaObject) {
+                        m_mediaObject->ensureStopped();
+
+                        hr = info.pGraph->RemoveFilter(filter);
+                    }
+                    Q_ASSERT(SUCCEEDED(hr));
+                    info.pGraph->Release();
+                }
+            }
         }
 
         void BackendNode::setMediaObject(MediaObject *mo)
diff --git a/src/3rdparty/phonon/ds9/mediaobject.cpp b/src/3rdparty/phonon/ds9/mediaobject.cpp
index 250b94a..106a4c8 100644
--- a/src/3rdparty/phonon/ds9/mediaobject.cpp
+++ b/src/3rdparty/phonon/ds9/mediaobject.cpp
@@ -177,7 +177,7 @@ namespace Phonon
 
         void WorkerThread::handleTask()
         {
-            QMutexLocker locker(Backend::directShowMutex());
+            QMutexLocker locker(Backend::directShowMutex);
             {
                 QMutexLocker locker(&m_mutex);
                 if (m_finished || m_queue.isEmpty()) {