Py vs C - identity latency and speed check.

Original commit message from CVS:
Py vs C - identity latency and speed check.
The "you know something is wrong when Python is 2x as fast as C" commit.

examples/gst/ilat.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python2.2
+#
+# gst-python
+# Copyright (C) 2002 David I. Lehn
+#
+# 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.
+# 
+# Author: David I. Lehn <dlehn@vt.edu>
+#
+
+import sys
+from gstreamer import *
+from gobject import GObject
+import time
+from identity import Identity
+
+def update(sender, *args):
+   print sender.get_name(), args
+
+def build(filters, b):
+   # create a new bin to hold the elements
+   bin = gst_pipeline_new ('pipeline')
+
+   src = gst_elementfactory_make ('fakesrc', 'source');
+   assert src
+   src.set_property('silent', 1)
+   src.set_property('num_buffers', b)
+
+   sink = gst_elementfactory_make ('fakesink', 'sink')
+   assert sink
+   sink.set_property('silent', 1)
+
+   elements = [src] + filters + [sink]
+   #  add objects to the main pipeline
+   for e in elements: 
+      bin.add(e)
+
+   # connect the elements
+   previous = None
+   for e in elements:
+      if previous:
+         previous.connect('src', e, 'sink')
+      previous = e
+
+   return bin
+
+def filter(bin):
+   bin.set_state(STATE_PLAYING);
+   while bin.iterate(): pass
+   bin.set_state(STATE_NULL)
+
+ccnt = 0
+def c():
+   global ccnt
+   id = gst_elementfactory_make ('identity', 'c identity %d' % ccnt);
+   assert id
+   id.set_property('silent', 1)
+   id.set_property('loop_based', 0)
+   ccnt += 1
+   return id
+
+pcnt = 0
+def py():
+   id = Identity()
+   assert id
+   global pcnt
+   id.set_name('py identity %d' % pcnt)
+   pcnt += 1
+   return id
+
+def check(f, n, b):
+   fs = []
+   for i in range(n):
+      fs.append(f())
+
+   pipe = build(fs, b)
+
+   start = time.time()
+   ret = filter(pipe)
+   print '%s b:%d i:%d t:%f' % (f, b, n, time.time() - start)
+   return ret
+
+def main():
+   "Identity timer and latency check"
+   gst_debug_set_categories(0)
+
+   if len(sys.argv) < 3:
+      print 'usage: %s identites buffers' % (sys.argv[0],)
+      return -1
+   n = int(sys.argv[1])
+   b = int(sys.argv[2])
+   for f in (c, py):
+      check(f, n, b)
+
+if __name__ == '__main__':
+   ret = main()
+   sys.exit (ret)

examples/gstreamer/ilat.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python2.2
+#
+# gst-python
+# Copyright (C) 2002 David I. Lehn
+#
+# 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.
+# 
+# Author: David I. Lehn <dlehn@vt.edu>
+#
+
+import sys
+from gstreamer import *
+from gobject import GObject
+import time
+from identity import Identity
+
+def update(sender, *args):
+   print sender.get_name(), args
+
+def build(filters, b):
+   # create a new bin to hold the elements
+   bin = gst_pipeline_new ('pipeline')
+
+   src = gst_elementfactory_make ('fakesrc', 'source');
+   assert src
+   src.set_property('silent', 1)
+   src.set_property('num_buffers', b)
+
+   sink = gst_elementfactory_make ('fakesink', 'sink')
+   assert sink
+   sink.set_property('silent', 1)
+
+   elements = [src] + filters + [sink]
+   #  add objects to the main pipeline
+   for e in elements: 
+      bin.add(e)
+
+   # connect the elements
+   previous = None
+   for e in elements:
+      if previous:
+         previous.connect('src', e, 'sink')
+      previous = e
+
+   return bin
+
+def filter(bin):
+   bin.set_state(STATE_PLAYING);
+   while bin.iterate(): pass
+   bin.set_state(STATE_NULL)
+
+ccnt = 0
+def c():
+   global ccnt
+   id = gst_elementfactory_make ('identity', 'c identity %d' % ccnt);
+   assert id
+   id.set_property('silent', 1)
+   id.set_property('loop_based', 0)
+   ccnt += 1
+   return id
+
+pcnt = 0
+def py():
+   id = Identity()
+   assert id
+   global pcnt
+   id.set_name('py identity %d' % pcnt)
+   pcnt += 1
+   return id
+
+def check(f, n, b):
+   fs = []
+   for i in range(n):
+      fs.append(f())
+
+   pipe = build(fs, b)
+
+   start = time.time()
+   ret = filter(pipe)
+   print '%s b:%d i:%d t:%f' % (f, b, n, time.time() - start)
+   return ret
+
+def main():
+   "Identity timer and latency check"
+   gst_debug_set_categories(0)
+
+   if len(sys.argv) < 3:
+      print 'usage: %s identites buffers' % (sys.argv[0],)
+      return -1
+   n = int(sys.argv[1])
+   b = int(sys.argv[2])
+   for f in (c, py):
+      check(f, n, b)
+
+if __name__ == '__main__':
+   ret = main()
+   sys.exit (ret)