| 45 | |
| 46 | |
| 47 | class Window(gtk.Dialog): |
| 48 | def __init__(self): |
| 49 | gtk.Dialog.__init__(self, 'Volume Level') |
| 50 | self.prepare_ui() |
| 51 | |
| 52 | def prepare_ui(self): |
| 53 | self.set_default_size(200,60) |
| 54 | self.set_title('Volume Level') |
| 55 | self.connect('delete-event', lambda *x: gtk.main_quit()) |
| 56 | self.vus = [] |
| 57 | self.vus.append(fvumeter.FVUMeter()) |
| 58 | self.vus.append(fvumeter.FVUMeter()) |
| 59 | self.vbox.add(self.vus[0]) |
| 60 | self.vbox.add(self.vus[1]) |
| 61 | self.vus[0].show() |
| 62 | self.vus[1].show() |
| 63 | |
| 64 | def error(self, message, secondary=None): |
| 65 | m = gtk.MessageDialog(self, |
| 66 | gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT, |
| 67 | gtk.MESSAGE_ERROR, |
| 68 | gtk.BUTTONS_OK, |
| 69 | message) |
| 70 | if secondary: |
| 71 | m.format_secondary_text(secondary) |
| 72 | m.run() |
| 73 | |
| 74 | def on_message(self, bus, message): |
| 75 | if message.structure.get_name() == 'level': |
| 76 | s = message.structure |
| 77 | for i in range(0, len(s['peak'])): |
| 78 | self.vus[i].freeze_notify() |
| 79 | decay = clamp(s['decay'][i], -90.0, 0.0) |
| 80 | peak = clamp(s['peak'][i], -90.0, 0.0) |
| 81 | if peak > decay: |
| 82 | print "ERROR: peak bigger than decay!" |
| 83 | |
| 84 | self.vus[i].set_property('decay', decay) |
| 85 | self.vus[i].set_property('peak', peak) |
| 86 | return True |
| 87 | |
| 88 | def run(self): |
| 89 | try: |
| 90 | self.set_sensitive(False) |
| 91 | s = 'alsasrc ! level message=true ! fakesink' |
| 92 | pipeline = gst.parse_launch(s) |
| 93 | self.set_sensitive(True) |
| 94 | pipeline.get_bus().add_signal_watch() |
| 95 | i = pipeline.get_bus().connect('message::element', self.on_message) |
| 96 | pipeline.set_state(gst.STATE_PLAYING) |
| 97 | gtk.Dialog.run(self) |
| 98 | pipeline.get_bus().disconnect(i) |
| 99 | pipeline.get_bus().remove_signal_watch() |
| 100 | pipeline.set_state(gst.STATE_NULL) |
| 101 | except gobject.GError, e: |
| 102 | self.set_sensitive(True) |
| 103 | self.error('Could not create pipeline', e.__str__) |
| 104 | |