festival: Don't forward all queries

This fixes issues where wavparse would query the file size upstream
and assert because the file size is way smaller then what the WAVE
header says. This patch disable or cane a handful of queries that
make no sense to forward.

https://bugzilla.gnome.org/show_bug.cgi?id=791811

1 files changed, 26 insertions, 0 deletions

diff --git a/gst/festival/gstfestival.c b/gst/festival/gstfestival.c
index 73d492ab8..407fa3bc2 100644
--- a/gst/festival/gstfestival.c
+++ b/gst/festival/gstfestival.c
@@ -112,6 +112,8 @@ static void gst_festival_finalize (GObject * object);
 
 static GstFlowReturn gst_festival_chain (GstPad * pad, GstObject * parent,
     GstBuffer * buf);
+static gboolean gst_festival_src_query (GstPad * pad, GstObject * parent,
+    GstQuery * query);
 static GstStateChangeReturn gst_festival_change_state (GstElement * element,
     GstStateChange transition);
 
@@ -184,6 +186,7 @@ gst_festival_init (GstFestival * festival)
 
   festival->srcpad =
       gst_pad_new_from_static_template (&src_template_factory, "src");
+  gst_pad_set_query_function (festival->srcpad, gst_festival_src_query);
   gst_element_add_pad (GST_ELEMENT (festival), festival->srcpad);
 
   festival->info = festival_default_info ();
@@ -496,6 +499,29 @@ gst_festival_change_state (GstElement * element, GstStateChange transition)
 }
 
 static gboolean
+gst_festival_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
+{
+  switch (GST_QUERY_TYPE (query)) {
+    case GST_QUERY_POSITION:
+      /* Not supported */
+      return FALSE;
+    case GST_QUERY_DURATION:
+      gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
+      return TRUE;
+    case GST_QUERY_SEEKING:
+      gst_query_set_seeking (query, GST_FORMAT_BYTES, FALSE, 0, -1);
+      return TRUE;
+    case GST_QUERY_FORMATS:
+      gst_query_set_formats (query, 1, GST_FORMAT_BYTES);
+      return TRUE;
+    default:
+      break;
+  }
+
+  return gst_pad_query_default (pad, parent, query);
+}
+
+static gboolean
 plugin_init (GstPlugin * plugin)
 {
   GST_DEBUG_CATEGORY_INIT (festival_debug, "festival",