From f48fef2f77a67e13bbddd0e789b1d642565473d2 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Mon, 28 Nov 2016 12:22:49 +0200
Subject: [PATCH] multipartdemux: Post an error message on the bus if we got
 EOS without having added any pads

---
 gst/multipart/multipartdemux.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/gst/multipart/multipartdemux.c b/gst/multipart/multipartdemux.c
index afbc42a..23e67c2 100644
--- a/gst/multipart/multipartdemux.c
+++ b/gst/multipart/multipartdemux.c
@@ -106,6 +106,8 @@ static const GstNamesMap gstnames[] = {
 
 static GstFlowReturn gst_multipart_demux_chain (GstPad * pad,
     GstObject * parent, GstBuffer * buf);
+static gboolean gst_multipart_demux_event (GstPad * pad,
+    GstObject * parent, GstEvent * event);
 
 static GstStateChangeReturn gst_multipart_demux_change_state (GstElement *
     element, GstStateChange transition);
@@ -179,6 +181,8 @@ gst_multipart_demux_init (GstMultipartDemux * multipart)
   gst_element_add_pad (GST_ELEMENT_CAST (multipart), multipart->sinkpad);
   gst_pad_set_chain_function (multipart->sinkpad,
       GST_DEBUG_FUNCPTR (gst_multipart_demux_chain));
+  gst_pad_set_event_function (multipart->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_multipart_demux_event));
 
   multipart->adapter = gst_adapter_new ();
   multipart->boundary = DEFAULT_BOUNDARY;
@@ -571,6 +575,30 @@ multipart_find_boundary (GstMultipartDemux * multipart, gint * datalen)
   return MULTIPART_NEED_MORE_DATA;
 }
 
+static gboolean
+gst_multipart_demux_event (GstPad * pad, GstObject * parent, GstEvent * event)
+{
+  GstMultipartDemux *multipart;
+
+  multipart = GST_MULTIPART_DEMUX (parent);
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_EOS:
+      if (!multipart->srcpads) {
+        GST_ELEMENT_ERROR (multipart, STREAM, WRONG_TYPE,
+            ("This stream contains no valid streams."),
+            ("Got EOS before adding any pads"));
+        gst_event_unref (event);
+        return FALSE;
+      } else {
+        return gst_pad_event_default (pad, parent, event);
+      }
+      break;
+    default:
+      return gst_pad_event_default (pad, parent, event);
+  }
+}
+
 static GstFlowReturn
 gst_multipart_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
 {
-- 
2.7.4