clock: debug the clock return values

gst/gstclock.c

@@ -193,6 +193,36 @@ G_STMT_START {                                    \
   GST_OBJECT_UNLOCK (clock);                      \
 } G_STMT_END;
 
+typedef struct
+{
+  const gint ret;
+  const gchar *name;
+  GQuark quark;
+} GstClockQuarks;
+
+static GstClockQuarks clock_quarks[] = {
+  {GST_CLOCK_OK, "ok", 0},
+  {GST_CLOCK_EARLY, "early", 0},
+  {GST_CLOCK_UNSCHEDULED, "unscheduled", 0},
+  {GST_CLOCK_BUSY, "busy", 0},
+  {GST_CLOCK_BADTIME, "bad-time", 0},
+  {GST_CLOCK_ERROR, "error", 0},
+  {GST_CLOCK_UNSUPPORTED, "unsupported", 0},
+  {GST_CLOCK_DONE, "done", 0}
+};
+
+static const gchar *
+gst_clock_return_get_name (GstClockReturn ret)
+{
+  gint i;
+
+  for (i = 0; i < G_N_ELEMENTS (clock_quarks); i++) {
+    if (ret == clock_quarks[i].ret)
+      return clock_quarks[i].name;
+  }
+  return "unknown";
+}
+
 static void gst_clock_dispose (GObject * object);
 static void gst_clock_finalize (GObject * object);
 
@@ -512,7 +542,8 @@ gst_clock_id_wait (GstClockID id, GstClockTimeDiff * jitter)
   res = cclass->wait (clock, entry, jitter);
 
   GST_CAT_DEBUG_OBJECT (GST_CAT_CLOCK, clock,
-      "done waiting entry %p, res: %d", id, res);
+      "done waiting entry %p, res: %d (%s)", id, res,
+      gst_clock_return_get_name (res));
 
   if (entry->type == GST_CLOCK_ENTRY_PERIODIC)
     entry->time = requested + entry->interval;