--- /dev/null
+/* GStreamer
+ * Copyright (C) 2010 Stefan Kost <ensonic@users.sf.net>
+ *
+ * capsnego.c: benchmark for caps negotiation
+ *
+ * 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 <gst/gst.h>
+
+/* the code below recursively builds a pipeline, the GRAPH_DEPTH is the depth
+ * of the tree, NUM_CHILDREN is the number of branches on each level
+ */
+#define GRAPH_DEPTH 4
+#define NUM_CHILDREN 3
+
+static gboolean
+create_node (GstBin * bin, GstElement * sink, GstElement ** adder,
+ GstElement ** vol, GstElement ** ac)
+{
+
+ *adder = gst_element_factory_make ("adder", NULL);
+ if (!*adder) {
+ GST_WARNING ("need adder from gst-plugins-base");
+ return FALSE;
+ }
+ *vol = gst_element_factory_make ("volume", NULL);
+ if (!*vol) {
+ GST_WARNING ("need volume from gst-plugins-base");
+ return FALSE;
+ }
+ *ac = gst_element_factory_make ("audioconvert", NULL);
+ if (!*ac) {
+ GST_WARNING ("need audioconvert from gst-plugins-base");
+ return FALSE;
+ }
+ gst_bin_add_many (bin, *adder, *vol, *ac, NULL);
+ if (!gst_element_link_many (*adder, *vol, *ac, sink, NULL)) {
+ GST_WARNING ("can't link elements");
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static gboolean
+create_nodes (GstBin * bin, GstElement * sink, gint depth)
+{
+ GstElement *adder, *vol, *ac, *src;
+ gint i;
+
+ for (i = 0; i < NUM_CHILDREN; i++) {
+ if (depth > 0) {
+ if (!create_node (bin, sink, &adder, &vol, &ac)) {
+ return FALSE;
+ }
+ if (!create_nodes (bin, adder, depth - 1)) {
+ return FALSE;
+ }
+ } else {
+ src = gst_element_factory_make ("audiotestsrc", NULL);
+ if (!src) {
+ GST_WARNING ("need audiotestsrc from gst-plugins-base");
+ return FALSE;
+ }
+ gst_bin_add (bin, src);
+ if (!gst_element_link (src, sink)) {
+ GST_WARNING ("can't link elements");
+ return FALSE;
+ }
+ }
+ }
+ return TRUE;
+}
+
+static void
+event_loop (GstElement * bin)
+{
+ GstBus *bus;
+ GstMessage *msg = NULL;
+ gboolean running = TRUE;
+
+ bus = gst_element_get_bus (bin);
+
+ while (running) {
+ msg = gst_bus_poll (bus, GST_MESSAGE_STATE_CHANGED, -1);
+
+ if (GST_MESSAGE_SRC (msg) == (GstObject *) bin) {
+ GstState old_state, new_state;
+
+ gst_message_parse_state_changed (msg, &old_state, &new_state, NULL);
+ if (old_state == GST_STATE_READY && new_state == GST_STATE_PAUSED) {
+ running = FALSE;
+ }
+ }
+ gst_message_unref (msg);
+ }
+}
+
+
+gint
+main (gint argc, gchar * argv[])
+{
+ GstBin *bin;
+ GstClockTime start, end;
+ GstElement *sink;
+ GstElement *adder, *vol, *ac;
+
+ gst_init (&argc, &argv);
+
+ bin = GST_BIN (gst_pipeline_new ("pipeline"));
+
+ g_print ("building pipeline\n");
+ sink = gst_element_factory_make ("fakesink", NULL);
+ gst_bin_add (bin, sink);
+ if (!create_node (bin, sink, &adder, &vol, &ac)) {
+ goto Error;
+ }
+ if (!create_nodes (bin, adder, GRAPH_DEPTH)) {
+ goto Error;
+ }
+ g_print ("built pipeline with %d elements\n", GST_BIN_NUMCHILDREN (bin));
+
+ g_print ("starting pipeline\n");
+ gst_element_set_state (GST_ELEMENT (bin), GST_STATE_READY);
+ GST_DEBUG_BIN_TO_DOT_FILE (bin, GST_DEBUG_GRAPH_SHOW_MEDIA_TYPE, "capsnego");
+ start = gst_util_get_timestamp ();
+ gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PAUSED);
+ event_loop (GST_ELEMENT (bin));
+ end = gst_util_get_timestamp ();
+ g_print ("%" GST_TIME_FORMAT " reached paused\n",
+ GST_TIME_ARGS (end - start));
+
+Error:
+ gst_element_set_state (GST_ELEMENT (bin), GST_STATE_NULL);
+ gst_object_unref (bin);
+ return 0;
+}