[clutter-gst] video-sink: clear buffer in flush

[Wim Taymans <wtaymans src gnome org>]

commit 064a18d62b773d801bc0d3e8d4e6aae32afaef97
Author: Wim Taymans <wtaymans redhat com>
Date:   Tue May 19 16:31:38 2015 +0200

    video-sink: clear buffer in flush
    
    We need to release our refs to the buffer in FLUSH_START so that
    upstream can free and reuse the memory.

 clutter-gst/clutter-gst-video-sink.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/clutter-gst/clutter-gst-video-sink.c b/clutter-gst/clutter-gst-video-sink.c
index 5ee3f62..9037b94 100644
--- a/clutter-gst/clutter-gst-video-sink.c
+++ b/clutter-gst/clutter-gst-video-sink.c
@@ -2305,6 +2305,31 @@ clutter_gst_video_sink_propose_allocation (GstBaseSink *base_sink, GstQuery *que
   return TRUE;
 }
 
+static gboolean
+clutter_gst_video_sink_event (GstBaseSink * basesink, GstEvent * event)
+{
+  ClutterGstVideoSink *sink = CLUTTER_GST_VIDEO_SINK (basesink);
+  ClutterGstVideoSinkPrivate *priv = sink->priv;
+  ClutterGstSource *gst_source = priv->source;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_FLUSH_START:
+      g_mutex_lock (&gst_source->buffer_lock);
+      if (gst_source->buffer) {
+        GST_DEBUG ("Freeing existing buffer %p", gst_source->buffer);
+        gst_buffer_unref (gst_source->buffer);
+        gst_source->buffer = NULL;
+      }
+      g_mutex_unlock (&gst_source->buffer_lock);
+      break;
+
+    default:
+      break;
+  }
+
+  return GST_BASE_SINK_CLASS (clutter_gst_video_sink_parent_class)->event (basesink, event);
+}
+
 static void
 clutter_gst_video_sink_class_init (ClutterGstVideoSinkClass *klass)
 {
@@ -2346,6 +2371,7 @@ clutter_gst_video_sink_class_init (ClutterGstVideoSinkClass *klass)
   gb_class->set_caps = clutter_gst_video_sink_set_caps;
   gb_class->get_caps = clutter_gst_video_sink_get_caps;
   gb_class->propose_allocation = clutter_gst_video_sink_propose_allocation;
+  gb_class->event = clutter_gst_video_sink_event;
 
   gv_class->show_frame = _clutter_gst_video_sink_show_frame;