ext/vorbis/vorbisdec.c: We use fixed caps.

Original commit message from CVS:
* ext/vorbis/vorbisdec.c: (gst_vorbis_dec_init):
We use fixed caps.

* gst/playback/Makefile.am:
* gst/playback/test5.c: (new_pad), (no_more_pads), (start_finding),
(dump_element_stats), (main):
Added example stream introspection code.

ChangeLog

@@ -1,3 +1,13 @@
+2005-09-29  Wim Taymans  <wim@fluendo.com>
+
+	* ext/vorbis/vorbisdec.c: (gst_vorbis_dec_init):
+	We use fixed caps.
+
+	* gst/playback/Makefile.am:
+	* gst/playback/test5.c: (new_pad), (no_more_pads), (start_finding),
+	(dump_element_stats), (main):
+	Added example stream introspection code.
+
 2005-09-28  Stefan Kost  <ensonic@users.sf.net>
 
 	* gst/adder/gstadder.c: (gst_adder_collected):

ext/vorbis/vorbisdec.c

@@ -175,6 +175,7 @@ gst_vorbis_dec_init (GstVorbisDec * dec, GstVorbisDecClass * g_class)
   gst_pad_set_event_function (dec->srcpad, vorbis_dec_src_event);
   gst_pad_set_query_type_function (dec->srcpad, vorbis_get_query_types);
   gst_pad_set_query_function (dec->srcpad, vorbis_dec_src_query);
+  gst_pad_use_fixed_caps (dec->srcpad);
   gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
 
   dec->queued = NULL;

gst/playback/Makefile.am

@@ -31,7 +31,7 @@ noinst_HEADERS = \
 	gststreaminfo.h \
 	gststreamselector.h
 
-noinst_PROGRAMS = test decodetest test2 test3 test4
+noinst_PROGRAMS = test decodetest test2 test3 test4 test5
 
 test_LDADD = $(GST_LIBS) 
 test_CFLAGS = $(GST_CFLAGS)
@@ -45,6 +45,9 @@ test3_CFLAGS = $(GST_CFLAGS)
 test4_LDADD = $(GST_LIBS) 
 test4_CFLAGS = $(GST_CFLAGS)
 
+test5_LDADD = $(GST_LIBS) 
+test5_CFLAGS = $(GST_CFLAGS)
+
 decodetest_LDADD = $(GST_LIBS) 
 decodetest_CFLAGS = $(GST_CFLAGS)
 

gst/playback/test5.c

@@ -0,0 +1,123 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#include <unistd.h>
+#include <gst/gst.h>
+
+static GMainLoop *loop;
+
+static void
+new_pad (GstElement * element, GstPad * pad, gboolean last, GstElement * sink)
+{
+  g_debug ("New pad...");
+}
+
+static void
+no_more_pads (GstElement * element)
+{
+  g_debug ("No more pads...");
+  g_main_loop_quit (loop);
+}
+
+static gboolean
+start_finding (GstElement * pipeline)
+{
+  GstStateChangeReturn res;
+
+  g_print ("finding caps...\n");
+  res = gst_element_set_state (pipeline, GST_STATE_PAUSED);
+  if (res == GST_STATE_CHANGE_FAILURE) {
+    g_print ("could not pause\n");
+    exit (-1);
+  }
+  return FALSE;
+}
+
+static void
+dump_element_stats (GstElement * element)
+{
+  GstIterator *it;
+  gpointer data;
+
+  it = gst_element_iterate_src_pads (element);
+  while (gst_iterator_next (it, &data) == GST_ITERATOR_OK) {
+    GstPad *pad = GST_PAD (data);
+    GstCaps *caps;
+    gchar *str;
+    GstQuery *query;
+
+    g_print ("stream %s:\n", GST_OBJECT_NAME (pad));
+
+    caps = gst_pad_get_caps (pad);
+    str = gst_caps_to_string (caps);
+    g_print (" caps: %s\n", str);
+    g_free (str);
+
+    query = gst_query_new_position (GST_FORMAT_TIME);
+    if (gst_pad_query (pad, query)) {
+      gint64 duration;
+
+      gst_query_parse_position (query, NULL, NULL, &duration);
+
+      g_print (" duration: %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (duration));
+    }
+    gst_query_unref (query);
+
+    gst_object_unref (pad);
+  }
+  gst_iterator_free (it);
+}
+
+gint
+main (gint argc, gchar * argv[])
+{
+  GstElement *pipeline, *filesrc, *decodebin;
+
+  gst_init (&argc, &argv);
+
+  pipeline = gst_pipeline_new ("pipeline");
+
+  filesrc = gst_element_factory_make ("filesrc", "filesrc");
+  g_assert (filesrc);
+
+  decodebin = gst_element_factory_make ("decodebin", "decodebin");
+  g_assert (decodebin);
+
+  g_signal_connect (G_OBJECT (decodebin), "new-decoded-pad",
+      G_CALLBACK (new_pad), NULL);
+  g_signal_connect (G_OBJECT (decodebin), "no-more-pads",
+      G_CALLBACK (no_more_pads), NULL);
+
+  gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, NULL);
+  gst_element_link (filesrc, decodebin);
+
+  if (argc < 2) {
+    g_print ("usage: %s <uri>\n", argv[0]);
+    exit (-1);
+  }
+  g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
+
+  /* event based programming approach */
+  loop = g_main_loop_new (NULL, TRUE);
+  g_idle_add ((GSourceFunc) start_finding, pipeline);
+  g_main_loop_run (loop);
+
+  dump_element_stats (decodebin);
+
+  return 0;
+}