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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/191948">191948</a></dd>
<dt>Author</dt> <dd>carlosgc@webkit.org</dd>
<dt>Date</dt> <dd>2015-11-03 02:43:52 -0800 (Tue, 03 Nov 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>[GStreamer] Use GstBus sync message handler and schedule tasks to the main thread with RunLoop::dispatch
https://bugs.webkit.org/show_bug.cgi?id=150800

Reviewed by Philippe Normand.

This way we would avoid all the GScource + polling mechanism that
GST uses internally to handle messages asynchronously in the main thread.

* platform/graphics/gstreamer/GRefPtrGStreamer.cpp:
(WTF::adoptGRef):
(WTF::refGPtr&lt;GstMessage&gt;):
(WTF::derefGPtr&lt;GstMessage&gt;):
* platform/graphics/gstreamer/GRefPtrGStreamer.h:
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
(WebCore::MediaPlayerPrivateGStreamer::MediaPlayerPrivateGStreamer):
Initialize the WeakPtr factory.
(WebCore::MediaPlayerPrivateGStreamer::~MediaPlayerPrivateGStreamer):
reset the GstBus sync handler.
(WebCore::MediaPlayerPrivateGStreamer::handleMessage): Make it void.
(WebCore::MediaPlayerPrivateGStreamer::createGSTPlayBin): Add a
GstBus sync message handler and schedule the messages to the main
thread with RunLoop::main().dispatch().
(WebCore::mediaPlayerPrivateMessageCallback): Deleted.
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h:
(WebCore::MediaPlayerPrivateGStreamer::createWeakPtr): Create a WeakPtr.
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp:
(WebCore::MediaPlayerPrivateGStreamerBase::handleSyncMessage):
Handle the need context message that needs to be handled in the
caller thread.
(WebCore::mediaPlayerPrivateNeedContextMessageCallback): Deleted.
(WebCore::MediaPlayerPrivateGStreamerBase::~MediaPlayerPrivateGStreamerBase):
(WebCore::MediaPlayerPrivateGStreamerBase::setPipeline): Do not
connect to sync-message signal, handleSyncMessage() will be called
to handled messages synchronously.
(WebCore::MediaPlayerPrivateGStreamerBase::handleNeedContextMessage): Deleted.
* platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h:</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsgstreamerGRefPtrGStreamercpp">trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsgstreamerGRefPtrGStreamerh">trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.h</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamercpp">trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamerh">trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamerBasecpp">trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamerBaseh">trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/ChangeLog        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -1,5 +1,44 @@
</span><span class="cx"> 2015-11-03  Carlos Garcia Campos  &lt;cgarcia@igalia.com&gt;
</span><span class="cx"> 
</span><ins>+        [GStreamer] Use GstBus sync message handler and schedule tasks to the main thread with RunLoop::dispatch
+        https://bugs.webkit.org/show_bug.cgi?id=150800
+
+        Reviewed by Philippe Normand.
+
+        This way we would avoid all the GScource + polling mechanism that
+        GST uses internally to handle messages asynchronously in the main thread.
+
+        * platform/graphics/gstreamer/GRefPtrGStreamer.cpp:
+        (WTF::adoptGRef):
+        (WTF::refGPtr&lt;GstMessage&gt;):
+        (WTF::derefGPtr&lt;GstMessage&gt;):
+        * platform/graphics/gstreamer/GRefPtrGStreamer.h:
+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
+        (WebCore::MediaPlayerPrivateGStreamer::MediaPlayerPrivateGStreamer):
+        Initialize the WeakPtr factory.
+        (WebCore::MediaPlayerPrivateGStreamer::~MediaPlayerPrivateGStreamer):
+        reset the GstBus sync handler.
+        (WebCore::MediaPlayerPrivateGStreamer::handleMessage): Make it void.
+        (WebCore::MediaPlayerPrivateGStreamer::createGSTPlayBin): Add a
+        GstBus sync message handler and schedule the messages to the main
+        thread with RunLoop::main().dispatch().
+        (WebCore::mediaPlayerPrivateMessageCallback): Deleted.
+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h:
+        (WebCore::MediaPlayerPrivateGStreamer::createWeakPtr): Create a WeakPtr.
+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp:
+        (WebCore::MediaPlayerPrivateGStreamerBase::handleSyncMessage):
+        Handle the need context message that needs to be handled in the
+        caller thread.
+        (WebCore::mediaPlayerPrivateNeedContextMessageCallback): Deleted.
+        (WebCore::MediaPlayerPrivateGStreamerBase::~MediaPlayerPrivateGStreamerBase):
+        (WebCore::MediaPlayerPrivateGStreamerBase::setPipeline): Do not
+        connect to sync-message signal, handleSyncMessage() will be called
+        to handled messages synchronously.
+        (WebCore::MediaPlayerPrivateGStreamerBase::handleNeedContextMessage): Deleted.
+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h:
+
+2015-11-03  Carlos Garcia Campos  &lt;cgarcia@igalia.com&gt;
+
</ins><span class="cx">         [GStreamer] Cleanup the iradio properties
</span><span class="cx">         https://bugs.webkit.org/show_bug.cgi?id=148522
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsgstreamerGRefPtrGStreamercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.cpp (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.cpp        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.cpp        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -259,6 +259,25 @@
</span><span class="cx">         gst_toc_unref(ptr);
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+template&lt;&gt; GRefPtr&lt;GstMessage&gt; adoptGRef(GstMessage* ptr)
+{
+    return GRefPtr&lt;GstMessage&gt;(ptr, GRefPtrAdopt);
+}
+
+template&lt;&gt; GstMessage* refGPtr&lt;GstMessage&gt;(GstMessage* ptr)
+{
+    if (ptr)
+        return gst_message_ref(ptr);
+
+    return ptr;
+}
+
+template&lt;&gt; void derefGPtr&lt;GstMessage&gt;(GstMessage* ptr)
+{
+    if (ptr)
+        gst_message_unref(ptr);
+}
+
</ins><span class="cx"> template &lt;&gt; GRefPtr&lt;WebKitVideoSink&gt; adoptGRef(WebKitVideoSink* ptr)
</span><span class="cx"> {
</span><span class="cx">     ASSERT(!ptr || !g_object_is_floating(G_OBJECT(ptr)));
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsgstreamerGRefPtrGStreamerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.h (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.h        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/GRefPtrGStreamer.h        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -35,6 +35,7 @@
</span><span class="cx"> typedef struct _GstTagList GstTagList;
</span><span class="cx"> typedef struct _GstEvent GstEvent;
</span><span class="cx"> typedef struct _GstToc GstToc;
</span><ins>+typedef struct _GstMessage GstMessage;
</ins><span class="cx"> typedef struct _WebKitVideoSink WebKitVideoSink;
</span><span class="cx"> typedef struct _WebKitWebSrc WebKitWebSrc;
</span><span class="cx"> 
</span><span class="lines">@@ -88,6 +89,10 @@
</span><span class="cx"> template&lt;&gt; GstToc* refGPtr&lt;GstToc&gt;(GstToc* ptr);
</span><span class="cx"> template&lt;&gt; void derefGPtr&lt;GstToc&gt;(GstToc* ptr);
</span><span class="cx"> 
</span><ins>+template&lt;&gt; GRefPtr&lt;GstMessage&gt; adoptGRef(GstMessage*);
+template&lt;&gt; GstMessage* refGPtr&lt;GstMessage&gt;(GstMessage*);
+template&lt;&gt; void derefGPtr&lt;GstMessage&gt;(GstMessage*);
+
</ins><span class="cx"> template&lt;&gt; GRefPtr&lt;WebKitVideoSink&gt; adoptGRef(WebKitVideoSink* ptr);
</span><span class="cx"> template&lt;&gt; WebKitVideoSink* refGPtr&lt;WebKitVideoSink&gt;(WebKitVideoSink* ptr);
</span><span class="cx"> template&lt;&gt; void derefGPtr&lt;WebKitVideoSink&gt;(WebKitVideoSink* ptr);
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -41,6 +41,7 @@
</span><span class="cx"> #include &lt;limits&gt;
</span><span class="cx"> #include &lt;wtf/HexNumber.h&gt;
</span><span class="cx"> #include &lt;wtf/MediaTime.h&gt;
</span><ins>+#include &lt;wtf/RunLoop.h&gt;
</ins><span class="cx"> #include &lt;wtf/glib/GUniquePtr.h&gt;
</span><span class="cx"> #include &lt;wtf/text/CString.h&gt;
</span><span class="cx"> 
</span><span class="lines">@@ -80,11 +81,6 @@
</span><span class="cx"> 
</span><span class="cx"> namespace WebCore {
</span><span class="cx"> 
</span><del>-static gboolean mediaPlayerPrivateMessageCallback(GstBus*, GstMessage* message, MediaPlayerPrivateGStreamer* player)
-{
-    return player-&gt;handleMessage(message);
-}
-
</del><span class="cx"> static void mediaPlayerPrivateSourceChangedCallback(GObject*, GParamSpec*, MediaPlayerPrivateGStreamer* player)
</span><span class="cx"> {
</span><span class="cx">     player-&gt;sourceChanged();
</span><span class="lines">@@ -174,6 +170,7 @@
</span><span class="cx"> 
</span><span class="cx"> MediaPlayerPrivateGStreamer::MediaPlayerPrivateGStreamer(MediaPlayer* player)
</span><span class="cx">     : MediaPlayerPrivateGStreamerBase(player)
</span><ins>+    , m_weakPtrFactory(this)
</ins><span class="cx">     , m_source(0)
</span><span class="cx">     , m_seekTime(0)
</span><span class="cx">     , m_changingRate(false)
</span><span class="lines">@@ -247,8 +244,7 @@
</span><span class="cx">     if (m_pipeline) {
</span><span class="cx">         GRefPtr&lt;GstBus&gt; bus = adoptGRef(gst_pipeline_get_bus(GST_PIPELINE(m_pipeline.get())));
</span><span class="cx">         ASSERT(bus);
</span><del>-        g_signal_handlers_disconnect_by_func(bus.get(), reinterpret_cast&lt;gpointer&gt;(mediaPlayerPrivateMessageCallback), this);
-        gst_bus_remove_signal_watch(bus.get());
</del><ins>+        gst_bus_set_sync_handler(bus.get(), nullptr, nullptr, nullptr);
</ins><span class="cx"> 
</span><span class="cx">         g_signal_handlers_disconnect_by_func(m_pipeline.get(), reinterpret_cast&lt;gpointer&gt;(mediaPlayerPrivateSourceChangedCallback), this);
</span><span class="cx">         g_signal_handlers_disconnect_by_func(m_pipeline.get(), reinterpret_cast&lt;gpointer&gt;(mediaPlayerPrivateVideoChangedCallback), this);
</span><span class="lines">@@ -905,7 +901,7 @@
</span><span class="cx">     return timeRanges;
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-gboolean MediaPlayerPrivateGStreamer::handleMessage(GstMessage* message)
</del><ins>+void MediaPlayerPrivateGStreamer::handleMessage(GstMessage* message)
</ins><span class="cx"> {
</span><span class="cx">     GUniqueOutPtr&lt;GError&gt; err;
</span><span class="cx">     GUniqueOutPtr&lt;gchar&gt; debug;
</span><span class="lines">@@ -924,7 +920,7 @@
</span><span class="cx">         // notify of the new location(s) of the media.
</span><span class="cx">         if (!g_strcmp0(messageTypeName, &quot;redirect&quot;)) {
</span><span class="cx">             mediaLocationChanged(message);
</span><del>-            return TRUE;
</del><ins>+            return;
</ins><span class="cx">         }
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="lines">@@ -1065,7 +1061,7 @@
</span><span class="cx">                     GST_MESSAGE_TYPE_NAME(message));
</span><span class="cx">         break;
</span><span class="cx">     }
</span><del>-    return TRUE;
</del><ins>+    return;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> void MediaPlayerPrivateGStreamer::processBufferingStats(GstMessage* message)
</span><span class="lines">@@ -1938,9 +1934,25 @@
</span><span class="cx">     setStreamVolumeElement(GST_STREAM_VOLUME(m_pipeline.get()));
</span><span class="cx"> 
</span><span class="cx">     GRefPtr&lt;GstBus&gt; bus = adoptGRef(gst_pipeline_get_bus(GST_PIPELINE(m_pipeline.get())));
</span><del>-    gst_bus_add_signal_watch(bus.get());
-    g_signal_connect(bus.get(), &quot;message&quot;, G_CALLBACK(mediaPlayerPrivateMessageCallback), this);
</del><ins>+    gst_bus_set_sync_handler(bus.get(), [](GstBus*, GstMessage* message, gpointer userData) {
+        auto&amp; player = *static_cast&lt;MediaPlayerPrivateGStreamer*&gt;(userData);
</ins><span class="cx"> 
</span><ins>+        if (!player.handleSyncMessage(message)) {
+            if (isMainThread())
+                player.handleMessage(message);
+            else {
+                GRefPtr&lt;GstMessage&gt; protectMessage(message);
+                auto weakThis = player.createWeakPtr();
+                RunLoop::main().dispatch([weakThis, protectMessage] {
+                    if (weakThis)
+                        weakThis-&gt;handleMessage(protectMessage.get());
+                });
+            }
+        }
+        gst_message_unref(message);
+        return GST_BUS_DROP;
+    }, this, nullptr);
+
</ins><span class="cx">     g_object_set(m_pipeline.get(), &quot;mute&quot;, m_player-&gt;muted(), nullptr);
</span><span class="cx"> 
</span><span class="cx">     g_signal_connect(m_pipeline.get(), &quot;notify::source&quot;, G_CALLBACK(mediaPlayerPrivateSourceChangedCallback), this);
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamerh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -33,6 +33,7 @@
</span><span class="cx"> #include &lt;gst/gst.h&gt;
</span><span class="cx"> #include &lt;gst/pbutils/install-plugins.h&gt;
</span><span class="cx"> #include &lt;wtf/Forward.h&gt;
</span><ins>+#include &lt;wtf/WeakPtr.h&gt;
</ins><span class="cx"> #include &lt;wtf/glib/GThreadSafeMainLoopSource.h&gt;
</span><span class="cx"> 
</span><span class="cx"> #if ENABLE(VIDEO_TRACK) &amp;&amp; USE(GSTREAMER_MPEGTS)
</span><span class="lines">@@ -67,7 +68,7 @@
</span><span class="cx">     ~MediaPlayerPrivateGStreamer();
</span><span class="cx"> 
</span><span class="cx">     static void registerMediaEngine(MediaEngineRegistrar);
</span><del>-    gboolean handleMessage(GstMessage*);
</del><ins>+    void handleMessage(GstMessage*);
</ins><span class="cx">     void handlePluginInstallerResult(GstInstallPluginsReturn);
</span><span class="cx"> 
</span><span class="cx">     bool hasVideo() const override { return m_hasVideo; }
</span><span class="lines">@@ -147,6 +148,8 @@
</span><span class="cx"> 
</span><span class="cx">     static bool isAvailable();
</span><span class="cx"> 
</span><ins>+    WeakPtr&lt;MediaPlayerPrivateGStreamer&gt; createWeakPtr() { return m_weakPtrFactory.createWeakPtr(); }
+
</ins><span class="cx">     GstElement* createAudioSink() override;
</span><span class="cx"> 
</span><span class="cx">     float playbackPosition() const;
</span><span class="lines">@@ -172,7 +175,6 @@
</span><span class="cx">     bool doSeek(gint64 position, float rate, GstSeekFlags seekType);
</span><span class="cx">     void updatePlaybackRate();
</span><span class="cx"> 
</span><del>-
</del><span class="cx">     String engineDescription() const override { return &quot;GStreamer&quot;; }
</span><span class="cx">     bool isLiveStream() const override { return m_isStreaming; }
</span><span class="cx">     bool didPassCORSAccessCheck() const override;
</span><span class="lines">@@ -186,7 +188,8 @@
</span><span class="cx">     MediaTime totalFrameDelay() override { return MediaTime::zeroTime(); }
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><del>-private:
</del><ins>+    WeakPtrFactory&lt;MediaPlayerPrivateGStreamer&gt; m_weakPtrFactory;
+
</ins><span class="cx">     GRefPtr&lt;GstElement&gt; m_source;
</span><span class="cx"> #if ENABLE(VIDEO_TRACK)
</span><span class="cx">     GRefPtr&lt;GstElement&gt; m_textAppSink;
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamerBasecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -128,11 +128,6 @@
</span><span class="cx"> }
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><del>-static void mediaPlayerPrivateNeedContextMessageCallback(GstBus*, GstMessage* message, MediaPlayerPrivateGStreamerBase* player)
-{
-    player-&gt;handleNeedContextMessage(message);
-}
-
</del><span class="cx"> MediaPlayerPrivateGStreamerBase::MediaPlayerPrivateGStreamerBase(MediaPlayer* player)
</span><span class="cx">     : m_player(player)
</span><span class="cx">     , m_fpsSink(0)
</span><span class="lines">@@ -179,8 +174,6 @@
</span><span class="cx">     if (m_pipeline) {
</span><span class="cx">         GRefPtr&lt;GstBus&gt; bus = adoptGRef(gst_pipeline_get_bus(GST_PIPELINE(m_pipeline.get())));
</span><span class="cx">         ASSERT(bus);
</span><del>-        g_signal_handlers_disconnect_by_func(bus.get(), reinterpret_cast&lt;gpointer&gt;(mediaPlayerPrivateNeedContextMessageCallback), this);
-        gst_bus_disable_sync_message_emission(bus.get());
</del><span class="cx">         m_pipeline.clear();
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="lines">@@ -193,26 +186,25 @@
</span><span class="cx"> void MediaPlayerPrivateGStreamerBase::setPipeline(GstElement* pipeline)
</span><span class="cx"> {
</span><span class="cx">     m_pipeline = pipeline;
</span><del>-
-    GRefPtr&lt;GstBus&gt; bus = adoptGRef(gst_pipeline_get_bus(GST_PIPELINE(m_pipeline.get())));
-    gst_bus_enable_sync_message_emission(bus.get());
-    g_signal_connect(bus.get(), &quot;sync-message::need-context&quot;, G_CALLBACK(mediaPlayerPrivateNeedContextMessageCallback), this);
</del><span class="cx"> }
</span><span class="cx"> 
</span><del>-void MediaPlayerPrivateGStreamerBase::handleNeedContextMessage(GstMessage* message)
</del><ins>+bool MediaPlayerPrivateGStreamerBase::handleSyncMessage(GstMessage* message)
</ins><span class="cx"> {
</span><span class="cx"> #if USE(GSTREAMER_GL)
</span><ins>+    if (GST_MESSAGE_TYPE(message) != GST_MESSAGE_NEED_CONTEXT)
+        return false;
+
</ins><span class="cx">     const gchar* contextType;
</span><span class="cx">     gst_message_parse_context_type(message, &amp;contextType);
</span><span class="cx"> 
</span><span class="cx">     if (!ensureGstGLContext())
</span><del>-        return;
</del><ins>+        return false;
</ins><span class="cx"> 
</span><span class="cx">     if (!g_strcmp0(contextType, GST_GL_DISPLAY_CONTEXT_TYPE)) {
</span><span class="cx">         GstContext* displayContext = gst_context_new(GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
</span><span class="cx">         gst_context_set_gl_display(displayContext, m_glDisplay.get());
</span><span class="cx">         gst_element_set_context(GST_ELEMENT(message-&gt;src), displayContext);
</span><del>-        return;
</del><ins>+        return true;
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     if (!g_strcmp0(contextType, &quot;gst.gl.app_context&quot;)) {
</span><span class="lines">@@ -220,11 +212,13 @@
</span><span class="cx">         GstStructure* structure = gst_context_writable_structure(appContext);
</span><span class="cx">         gst_structure_set(structure, &quot;context&quot;, GST_GL_TYPE_CONTEXT, m_glContext.get(), nullptr);
</span><span class="cx">         gst_element_set_context(GST_ELEMENT(message-&gt;src), appContext);
</span><del>-        return;
</del><ins>+        return true;
</ins><span class="cx">     }
</span><span class="cx"> #else
</span><span class="cx">     UNUSED_PARAM(message);
</span><span class="cx"> #endif // USE(GSTREAMER_GL)
</span><ins>+
+    return false;
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> #if USE(GSTREAMER_GL)
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsgstreamerMediaPlayerPrivateGStreamerBaseh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h (191947 => 191948)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h        2015-11-03 10:40:06 UTC (rev 191947)
+++ trunk/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h        2015-11-03 10:43:52 UTC (rev 191948)
</span><span class="lines">@@ -66,7 +66,6 @@
</span><span class="cx"> #if USE(GSTREAMER_GL)
</span><span class="cx">     bool ensureGstGLContext();
</span><span class="cx"> #endif
</span><del>-    void handleNeedContextMessage(GstMessage*);
</del><span class="cx"> 
</span><span class="cx">     bool supportsMuting() const { return true; }
</span><span class="cx">     void setMuted(bool);
</span><span class="lines">@@ -121,6 +120,8 @@
</span><span class="cx"> 
</span><span class="cx">     void setPipeline(GstElement*);
</span><span class="cx"> 
</span><ins>+    virtual bool handleSyncMessage(GstMessage*);
+
</ins><span class="cx">     MediaPlayer* m_player;
</span><span class="cx">     GRefPtr&lt;GstElement&gt; m_pipeline;
</span><span class="cx">     GRefPtr&lt;GstStreamVolume&gt; m_volumeElement;
</span></span></pre>
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