shmsink: unref buffer if no clients are connected

If no client has received the command, unref the buffer. This will
make sure that the shared memory area does not get filled with buffers
no one knows about.

https://bugzilla.gnome.org/show_bug.cgi?id=702684

diff --git a/sys/shm/gstshmsink.c b/sys/shm/gstshmsink.c
index 1310847..cbebdf5 100644 (file)
--- a/sys/shm/gstshmsink.c
+++ b/sys/shm/gstshmsink.c
@@ -743,7 +743,10 @@ gst_shm_sink_render (GstBaseSink * bsink, GstBuffer * buf)
 
   GST_OBJECT_UNLOCK (self);
 
-  if (rv == -1) {
+  if (rv == 0) {
+    GST_DEBUG_OBJECT (self, "No clients connected, unreffing buffer");
+    gst_buffer_unref (sendbuf);
+  } else if (rv == -1) {
     GST_ELEMENT_ERROR (self, STREAM, FAILED, ("Invalid allocated buffer"),
         ("The shmpipe library rejects our buffer, this is a bug"));
     ret = GST_FLOW_ERROR;