benchmarks: add a benchmark for capsnegotiation

The test builds a tree like graph having conversion and basetransform elements.

tests/benchmarks/.gitignore

@@ -1,9 +1,10 @@
 Makefile
 Makefile.in
-gstbufferstress
 caps
+capsnego
 complexity
 controller
+gstbufferstress
 gstclockstress
 gstpollstress
 mass-elements

tests/benchmarks/Makefile.am

@@ -1,5 +1,6 @@
 noinst_PROGRAMS = \
         caps \
+        capsnego \
         complexity \
         controller \
         init \

tests/benchmarks/capsnego.c

@@ -0,0 +1,151 @@
+/* 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;
+}