gstreamer/examples/vumeter.py
Thomas Vander Stichele a74cc80a77 examples/vumeter.py: update for property name change
Original commit message from CVS:
* examples/vumeter.py:
update for property name change
* gst/gst.override:
* testsuite/test_element.py:
actually log on objects, yay
2005-09-12 17:06:09 +00:00

103 lines
3.2 KiB
Python
Executable file

#!/usr/bin/env python
#
# gst-python
# Copyright (C) 2005 Andy Wingo <wingo@pobox.com>
#
# 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.
# A test more of gst-plugins than of gst-python.
import pygtk
pygtk.require('2.0')
import gtk
import gobject
import pygst
pygst.require('0.9')
import gst
import fvumeter
def clamp(x, min, max):
if x < min:
return min
elif x > max:
return max
return x
class Window(gtk.Dialog):
def __init__(self):
gtk.Dialog.__init__(self, 'Volume Level')
self.prepare_ui()
def prepare_ui(self):
self.set_default_size(200,60)
self.set_title('Volume Level')
self.connect('delete-event', lambda *x: gtk.main_quit())
self.vu = fvumeter.FVUMeter()
self.vu.show()
self.vbox.pack_start(self.vu)
def error(self, message, secondary=None):
m = gtk.MessageDialog(self,
gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
gtk.MESSAGE_ERROR,
gtk.BUTTONS_OK,
message)
if secondary:
m.format_secondary_text(secondary)
m.run()
def on_message(self, bus, message):
t = message.type
if t == gst.MESSAGE_STATE_CHANGED:
pass
if (t == gst.MESSAGE_APPLICATION and
message.structure.get_name() == 'level'):
s = message.structure
self.vu.set_property('peak', clamp(s['peak'][0], -90.0, 0.0))
self.vu.set_property('decay', clamp(s['decay'][0], -90.0, 0.0))
else:
print '%s: %s:' % (message.src.get_path_string(),
message.type.value_nicks[1])
print ' %s' % message.structure.to_string()
return True
def run(self):
try:
self.set_sensitive(False)
s = 'alsasrc ! level message=true ! fakesink'
pipeline = gst.parse_launch(s)
self.set_sensitive(True)
watch_id = pipeline.get_bus().add_watch(self.on_message)
if pipeline.set_state(gst.STATE_PLAYING) == gst.STATE_SUCCESS:
gtk.Dialog.run(self)
else:
self.error('Could not set state')
pipeline.set_state(gst.STATE_NULL)
gobject.source_remove(watch_id)
except gobject.GError, e:
self.set_sensitive(True)
self.error('Could not create pipeline', e.__str__)
if __name__ == '__main__':
w = Window()
w.show()
w.run()