gst-launch: refer to element, pad, or object in some message strings

Revisit these strings now that the change regarding the message source
object in gst_element_found_tags_for_pad() got reverted. Try to refer
explicitly to what kind of element it is (element, pad, etc.) in some
cases, which is nicer than having to deduce this info (and we can
re-use the already existing translated strings for the most common
case). It also makes for better example code, since it's clear now
that the message source object doesn't have to be an element.

diff --git a/tools/gst-launch.c b/tools/gst-launch.c
index 9af4f04..5e578e6 100644 (file)
--- a/tools/gst-launch.c
+++ b/tools/gst-launch.c
@@ -406,22 +406,32 @@ event_loop (GstElement * pipeline, gboolean blocking, GstState target_state)
 
     /* check if we need to dump messages to the console */
     if (messages) {
+      GstObject *src_obj;
       const GstStructure *s;
       guint32 seqnum;
-      gchar *src_name;
 
       seqnum = gst_message_get_seqnum (message);
 
       s = gst_message_get_structure (message);
 
-      src_name =
-          GST_MESSAGE_SRC (message) ?
-          gst_object_get_path_string (GST_MESSAGE_SRC (message)) : NULL;
-
-      g_print (_("Got Message #%u from object \"%s\" (%s): "), (guint) seqnum,
-          GST_STR_NULL (src_name), GST_MESSAGE_TYPE_NAME (message));
-
-      g_free (src_name);
+      src_obj = GST_MESSAGE_SRC (message);
+
+      if (GST_IS_ELEMENT (src_obj)) {
+        g_print (_("Got message #%u from element \"%s\" (%s): "),
+            (guint) seqnum, GST_ELEMENT_NAME (src_obj),
+            GST_MESSAGE_TYPE_NAME (message));
+      } else if (GST_IS_PAD (src_obj)) {
+        g_print (_("Got message #%u from pad \"%s:%s\" (%s): "),
+            (guint) seqnum, GST_DEBUG_PAD_NAME (src_obj),
+            GST_MESSAGE_TYPE_NAME (message));
+      } else if (GST_IS_OBJECT (src_obj)) {
+        g_print (_("Got message #%u from object \"%s\" (%s): "),
+            (guint) seqnum, GST_OBJECT_NAME (src_obj),
+            GST_MESSAGE_TYPE_NAME (message));
+      } else {
+        g_print (_("Got message #%u (%s): "), (guint) seqnum,
+            GST_MESSAGE_TYPE_NAME (message));
+      }
 
       if (s) {
         gchar *sstr;
@@ -455,25 +465,31 @@ event_loop (GstElement * pipeline, gboolean blocking, GstState target_state)
 #endif
         break;
       case GST_MESSAGE_EOS:{
-        gchar *src_name = GST_MESSAGE_SRC (message) ?
-            gst_object_get_path_string (GST_MESSAGE_SRC (message)) : NULL;
         waiting_eos = FALSE;
-        g_print (_("Got EOS from object \"%s\".\n"), GST_STR_NULL (src_name));
-        g_free (src_name);
+        g_print (_("Got EOS from element \"%s\".\n"),
+            GST_MESSAGE_SRC_NAME (message));
         goto exit;
       }
       case GST_MESSAGE_TAG:
         if (tags) {
           GstTagList *tags;
-          gchar *src_name = GST_MESSAGE_SRC (message) ?
-              gst_object_get_path_string (GST_MESSAGE_SRC (message)) : NULL;
+
+          if (GST_IS_ELEMENT (GST_MESSAGE_SRC (message))) {
+            g_print (_("FOUND TAG      : found by element \"%s\".\n"),
+                GST_MESSAGE_SRC_NAME (message));
+          } else if (GST_IS_PAD (GST_MESSAGE_SRC (message))) {
+            g_print (_("FOUND TAG      : found by pad \"%s:%s\".\n"),
+                GST_DEBUG_PAD_NAME (GST_MESSAGE_SRC (message)));
+          } else if (GST_IS_OBJECT (GST_MESSAGE_SRC (message))) {
+            g_print (_("FOUND TAG      : found by object \"%s\".\n"),
+                GST_MESSAGE_SRC_NAME (message));
+          } else {
+            g_print (_("FOUND TAG\n"));
+          }
 
           gst_message_parse_tag (message, &tags);
-          g_print (_("FOUND TAG      : found by object \"%s\".\n"),
-              GST_STR_NULL (src_name));
           gst_tag_list_foreach (tags, print_tag, NULL);
           gst_tag_list_free (tags);
-          g_free (src_name);
         }
         break;
       case GST_MESSAGE_INFO:{