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event: Don't allow invalid SELECT_STREAMS event creation

Browse source 
Asking to select no streams makes no sense and can create various
issues.

If one doesn't one any stream it should deactivate (or not use) the
element in question.
This commit is contained in:
Edward Hervey 2017-10-27 09:53:06 +02:00 committed by Edward Hervey
parent 4844adf193
commit c0c9a531ef
1 changed files with 6 additions and 1 deletions
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7
gst/gstevent.c
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@ -593,7 +593,10 @@ gst_event_parse_flush_stop (GstEvent * event, gboolean * reset_time)
* in #GST_EVENT_STREAM_START, #GST_EVENT_STREAM_COLLECTION or
* #GST_MESSSAGE_STREAM_COLLECTION.
*
* Returns: (transfer full): a new select-streams event.
* Note: The list of @streams can not be empty.
*
* Returns: (transfer full): a new select-streams event or %NULL in case of
* an error (like an empty streams list).
*
* Since: 1.10
*/
@ -605,6 +608,8 @@ gst_event_new_select_streams (GList * streams)
GstStructure *struc;
GList *tmpl;
g_return_val_if_fail (streams != NULL, NULL);
GST_CAT_INFO (GST_CAT_EVENT, "Creating new select-streams event");
struc = gst_structure_new_id_empty (GST_QUARK (EVENT_SELECT_STREAMS));
g_value_init (&val, GST_TYPE_LIST);