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oggmux: ensure serialnos are unique

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We do that by checking a newly generated one is not already used in
an existing stream, and doing it again if it is.

https://bugzilla.gnome.org/show_bug.cgi?id=640211
This commit is contained in:
Vincent Penquerc'h 2011-01-21 18:10:29 +00:00 committed by Tim-Philipp Müller
parent 54c19ba6de
commit 96a1a9dec6
1 changed files with 29 additions and 1 deletions
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30
ext/ogg/gstoggmux.c
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@ -337,6 +337,34 @@ gst_ogg_mux_sink_event (GstPad * pad, GstEvent * event)
return ret;
}
static gboolean
gst_ogg_mux_is_serialno_present (GstOggMux * ogg_mux, guint32 serialno)
{
GSList *walk;
walk = ogg_mux->collect->data;
while (walk) {
GstOggPadData *pad = (GstOggPadData *) walk->data;
if (pad->map.serialno == serialno)
return TRUE;
walk = walk->next;
}
return FALSE;
}
static guint32
gst_ogg_mux_generate_serialno (GstOggMux * ogg_mux)
{
guint32 serialno;
do {
serialno = g_random_int_range (0, G_MAXINT32);
} while (gst_ogg_mux_is_serialno_present (ogg_mux, serialno));
return serialno;
}
static GstPad *
gst_ogg_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name)
@ -364,7 +392,7 @@ gst_ogg_mux_request_new_pad (GstElement * element,
if (req_name == NULL || strlen (req_name) < 6) {
/* no name given when requesting the pad, use random serial number */
serial = rand ();
serial = gst_ogg_mux_generate_serialno (ogg_mux);
} else {
/* parse serial number from requested padname */
serial = atoi (&req_name[5]);