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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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111 lines
3.5 KiB
Python
Executable file
111 lines
3.5 KiB
Python
Executable file
#!/usr/bin/env python
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# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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# gst-python
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# Copyright (C) 2005 Andy Wingo <wingo@pobox.com>
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Library General Public
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# License as published by the Free Software Foundation; either
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# version 2 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Library General Public License for more details.
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#
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# You should have received a copy of the GNU Library General Public
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# License along with this library; if not, write to the
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# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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# Boston, MA 02111-1307, USA.
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# A test more of gst-plugins than of gst-python.
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import pygtk
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pygtk.require('2.0')
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import gtk
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import gobject
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import pygst
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pygst.require('0.9')
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import gst
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import fvumeter
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def clamp(x, min, max):
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if x < min:
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return min
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elif x > max:
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return max
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return x
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class Window(gtk.Dialog):
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def __init__(self):
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gtk.Dialog.__init__(self, 'Volume Level')
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self.prepare_ui()
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def prepare_ui(self):
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self.set_default_size(200,60)
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self.set_title('Volume Level')
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self.connect('delete-event', lambda *x: gtk.main_quit())
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self.vus = []
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self.vus.append(fvumeter.FVUMeter())
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self.vus.append(fvumeter.FVUMeter())
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self.vbox.add(self.vus[0])
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self.vbox.add(self.vus[1])
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self.vus[0].show()
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self.vus[1].show()
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def error(self, message, secondary=None):
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m = gtk.MessageDialog(self,
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gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
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gtk.MESSAGE_ERROR,
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gtk.BUTTONS_OK,
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message)
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if secondary:
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m.format_secondary_text(secondary)
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m.run()
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def on_message(self, bus, message):
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if message.structure.get_name() == 'level':
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s = message.structure
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for i in range(0, len(s['peak'])):
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self.vus[i].freeze_notify()
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decay = clamp(s['decay'][i], -90.0, 0.0)
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peak = clamp(s['peak'][i], -90.0, 0.0)
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if peak > decay:
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print "ERROR: peak bigger than decay!"
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self.vus[i].set_property('decay', decay)
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self.vus[i].set_property('peak', peak)
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return True
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def run(self):
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try:
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self.set_sensitive(False)
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s = 'alsasrc ! level message=true ! fakesink'
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pipeline = gst.parse_launch(s)
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self.set_sensitive(True)
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pipeline.get_bus().add_signal_watch()
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i = pipeline.get_bus().connect('message::application', self.on_message)
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if pipeline.set_state(gst.STATE_PLAYING) == gst.STATE_CHANGE_SUCCESS:
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print "going into main"
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gtk.Dialog.run(self)
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else:
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self.error('Could not set state')
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pipeline.get_bus().disconnect(i)
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pipeline.get_bus().remove_signal_watch()
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pipeline.set_state(gst.STATE_NULL)
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except gobject.GError, e:
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self.set_sensitive(True)
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self.error('Could not create pipeline', e.__str__)
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if __name__ == '__main__':
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w = Window()
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w.show_all()
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w.run()
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