gst/playback/test6.c: Make test work again by connecting fakesinks to each decoded pad, which makes the pipeline wait...

Original commit message from CVS:
* gst/playback/test6.c: (new_decoded_pad_cb), (show_error), (main):
Make test work again by connecting fakesinks to each decoded pad,
which makes the pipeline wait until each fakesink has a buffer
queued before going to PAUSED state. At that point we know the
decodebin pads are negotiated.

ChangeLog

@@ -1,3 +1,11 @@
+2006-02-01  Tim-Philipp Müller  <tim at centricular dot net>
+
+	* gst/playback/test6.c: (new_decoded_pad_cb), (show_error), (main):
+	  Make test work again by connecting fakesinks to each decoded pad,
+	  which makes the pipeline wait until each fakesink has a buffer
+	  queued before going to PAUSED state. At that point we know the
+	  decodebin pads are negotiated.
+
 2006-02-01  Tim-Philipp Müller  <tim at centricular dot net>
 
 	* gst-libs/gst/cdda/gstcddabasesrc.c: (gst_cdda_base_src_query),

gst/playback/test6.c

@@ -19,12 +19,58 @@
 #include <unistd.h>
 #include <gst/gst.h>
 
+static void
+new_decoded_pad_cb (GstElement * decodebin, GstPad * new_pad, gboolean last,
+    GstElement * pipeline)
+{
+  GstElement *fakesink;
+  GstPad *sinkpad;
+
+  fakesink = gst_element_factory_make ("fakesink", NULL);
+  gst_bin_add (GST_BIN (pipeline), fakesink);
+
+  sinkpad = gst_element_get_pad (fakesink, "sink");
+  if (GST_PAD_LINK_FAILED (gst_pad_link (new_pad, sinkpad))) {
+    g_warning ("Failed to link %s:%s to %s:%s", GST_DEBUG_PAD_NAME (new_pad),
+        GST_DEBUG_PAD_NAME (sinkpad));
+    gst_bin_remove (GST_BIN (pipeline), fakesink);
+  } else {
+    gst_element_set_state (fakesink, GST_STATE_PAUSED);
+  }
+}
+
+static void
+show_error (const gchar * errmsg, GstBus * bus)
+{
+  GstMessage *msg;
+  GError *err = NULL;
+  gchar *dbg = NULL;
+
+  msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
+  if (msg) {
+    g_assert (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ERROR);
+
+    gst_message_parse_error (msg, &err, &dbg);
+  }
+
+  g_print ("ERROR: %s\n", errmsg);
+  g_print ("       %s\n", (err) ? err->message : "");
+  if (dbg) {
+    g_print ("\ndebug: %s\n\n", dbg);
+    g_free (dbg);
+  }
+
+  if (err)
+    g_error_free (err);
+}
+
 gint
 main (gint argc, gchar * argv[])
 {
   GstElement *pipeline, *filesrc, *decodebin;
   GstStateChangeReturn res;
   GstIterator *it;
+  GstBus *bus;
   gpointer data;
 
   gst_init (&argc, &argv);
@@ -41,21 +87,38 @@ main (gint argc, gchar * argv[])
   gst_element_link (filesrc, decodebin);
 
   if (argc < 2) {
-    g_print ("usage: %s <uri>\n", argv[0]);
+    g_print ("usage: %s <filenames>\n", argv[0]);
     exit (-1);
   }
-  g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
+
+  if (!g_str_has_prefix (argv[1], "file://")) {
+    g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
+  } else {
+    g_object_set (G_OBJECT (filesrc), "location", argv[1] + 7, NULL);
+  }
+
+  /* we've got to connect fakesinks to newly decoded pads to make sure
+   * buffers have actually been flowing over those pads and caps have
+   * been set on them. decodebin might insert internal queues and
+   * without fakesinks it's pot-luck what caps we get from the pad, because
+   * it depends on whether the queues have started pushing buffers yet or not.
+   * With fakesinks we make sure that the pipeline doesn't go to PAUSED state
+   * before each fakesink has a buffer queued. */
+  g_signal_connect (decodebin, "new-decoded-pad",
+      G_CALLBACK (new_decoded_pad_cb), pipeline);
+
+  bus = gst_element_get_bus (pipeline);
 
   g_print ("pause..\n");
   res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
   if (res == GST_STATE_CHANGE_FAILURE) {
-    g_print ("could not pause\n");
+    show_error ("Could not go to PAUSED state", bus);
     exit (-1);
   }
   g_print ("waiting..\n");
   res = gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
   if (res != GST_STATE_CHANGE_SUCCESS) {
-    g_print ("could not complete pause\n");
+    show_error ("Failed to complete state change to PAUSED", bus);
     exit (-1);
   }
   g_print ("stats..\n");