basesrc: ensure submitted buffer list is writable

Fixes flaky appsrc unit test where depending on scheduling
the submitted list might not be writable if submitted via
an action signal from the application thread.

Fixes gst-plugins-base#522

diff --git a/libs/gst/base/gstbasesrc.c b/libs/gst/base/gstbasesrc.c
index fd46bd5..efe52e7 100644 (file)
--- a/libs/gst/base/gstbasesrc.c
+++ b/libs/gst/base/gstbasesrc.c
@@ -4036,7 +4036,8 @@ gst_base_src_submit_buffer_list (GstBaseSrc * src, GstBufferList * buffer_list)
   g_return_if_fail (GST_IS_BUFFER_LIST (buffer_list));
   g_return_if_fail (BASE_SRC_HAS_PENDING_BUFFER_LIST (src) == FALSE);
 
-  src->priv->pending_bufferlist = buffer_list;
+  /* we need it to be writable later in get_range() where we use get_writable */
+  src->priv->pending_bufferlist = gst_buffer_list_make_writable (buffer_list);
 
   GST_LOG_OBJECT (src, "%u buffers submitted in buffer list",
       gst_buffer_list_length (buffer_list));