--- /dev/null
+# gst-python
+# Copyright (C) 2005 Fluendo S.L.
+# Originally from the Flumotion streaming server.
+#
+# 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.
+
+
+import gtk
+from gtk import gdk
+import gobject
+
+
+# this VUMeter respects IEC standard
+# BS 6840-18:1996/IEC-268-18
+# and is inspired by JACK's meterbridge dpm_meters.c
+
+class FVUMeter(gtk.DrawingArea):
+ __gsignals__ = { 'expose-event' : 'override',
+ 'size-allocate': 'override',
+ 'size-request': 'override',
+ 'realize' : 'override'
+ }
+ __gproperties__ = {
+ 'peak' : (gobject.TYPE_FLOAT,
+ 'peak volume level',
+ 'peak volume level in dB',
+ -90.0,
+ 0,
+ -90.0,
+ gobject.PARAM_READWRITE),
+ 'decay' : (gobject.TYPE_FLOAT,
+ 'decay volume level',
+ 'decay volume level in dB',
+ -90.0,
+ 0,
+ -90.0,
+ gobject.PARAM_READWRITE),
+ 'orange-threshold': (gobject.TYPE_FLOAT,
+ 'threshold for orange',
+ 'threshold for orange use in dB',
+ -90.0,
+ 0,
+ -10.0,
+ gobject.PARAM_READWRITE),
+ 'red-threshold': (gobject.TYPE_FLOAT,
+ 'threshold for red',
+ 'threshold for red use in dB',
+ -90.0,
+ 0,
+ -1.0,
+ gobject.PARAM_READWRITE)
+
+ }
+ green_gc = None
+ orange_gc = None
+ red_gc = None
+ yellow_gc = None
+
+ topborder = 7
+ peaklevel = -90.0
+ decaylevel = -90.0
+ orange_threshold = -10.0
+ red_threshold = -1.0
+ bottomborder = 25
+ leftborder = 15
+ rightborder = 65
+
+ # Returns the meter deflection percentage given a db value
+ def iec_scale(self, db):
+ pct = 0.0
+
+ if db < -70.0:
+ pct = 0.0
+ elif db < -60.0:
+ pct = (db + 70.0) * 0.25
+ elif db < -50.0:
+ pct = (db + 60.0) * 0.5 + 2.5
+ elif db < -40.0:
+ pct = (db + 50.0) * 0.75 + 7.5
+ elif db < -30.0:
+ pct = (db + 40.0) * 1.5 + 15.0
+ elif db < -20.0:
+ pct = (db + 30.0) * 2.0 + 30.0
+ elif db < 0.0:
+ pct = (db + 20.0) * 2.5 + 50.0
+ else:
+ pct = 100.0
+
+ return pct
+
+ def do_get_property(self, property):
+ if property.name == 'peak':
+ return self.peaklevel
+ elif property.name == 'decay':
+ return self.decaylevel
+ elif property.name == 'orange-threshold':
+ return self.orange_threshold
+ elif property.name == 'red-threshold':
+ return self.red_threshold
+ else:
+ raise AttributeError, 'unknown property %s' % property.name
+
+ def do_set_property(self, property, value):
+ if property.name == 'peak':
+ self.peaklevel = value
+ elif property.name == 'decay':
+ self.decaylevel = value
+ elif property.name == 'orange-threshold':
+ self.orange_threshold = value
+ elif property.name == 'red-threshold':
+ self.red_threshold = value
+ else:
+ raise AttributeError, 'unknown property %s' % property.name
+
+ self.queue_draw()
+
+ def do_size_request(self, requisition):
+ requisition.width = 250
+ requisition.height = 50
+
+ def do_size_allocate(self, allocation):
+ self.allocation = allocation
+ if self.flags() & gtk.REALIZED:
+ self.window.move_resize(*allocation)
+
+ def do_realize(self):
+ self.set_flags(self.flags() | gtk.REALIZED)
+
+ self.window = gdk.Window(self.get_parent_window(),
+ width=self.allocation.width,
+ height=self.allocation.height,
+ window_type=gdk.WINDOW_CHILD,
+ wclass=gdk.INPUT_OUTPUT,
+ event_mask=self.get_events() | gdk.EXPOSURE_MASK)
+
+ colormap = gtk.gdk.colormap_get_system()
+ green = colormap.alloc_color(0, 65535, 0)
+ orange = colormap.alloc_color(65535, 32768, 0)
+ red = colormap.alloc_color(65535, 0, 0)
+ yellow = colormap.alloc_color(65535, 65535, 0)
+ self.green_gc = gdk.GC(self.window, foreground=green)
+ self.orange_gc = gdk.GC(self.window, foreground=orange)
+ self.red_gc = gdk.GC(self.window, foreground=red)
+ self.yellow_gc = gdk.GC(self.window, foreground=yellow)
+
+ self.window.set_user_data(self)
+ self.style.attach(self.window)
+ self.style.set_background(self.window, gtk.STATE_NORMAL)
+
+ def do_expose_event(self, event):
+ self.chain(event)
+
+ x, y, w, h = self.allocation
+ vumeter_width = w - (self.leftborder + self.rightborder)
+ vumeter_height = h - (self.topborder + self.bottomborder)
+ self.window.draw_rectangle(self.style.black_gc, True,
+ self.leftborder, self.topborder,
+ vumeter_width,
+ vumeter_height)
+ # draw peak level
+ peaklevelpct = self.iec_scale(self.peaklevel)
+ peakwidth = int(vumeter_width * (peaklevelpct/100))
+ draw_gc = self.green_gc
+ if self.peaklevel >= self.orange_threshold:
+ draw_gc = self.orange_gc
+ if self.peaklevel >= self.red_threshold:
+ draw_gc = self.red_gc
+ self.window.draw_rectangle(draw_gc, True,
+ self.leftborder, self.topborder,
+ peakwidth, vumeter_height)
+
+ # draw yellow decay level
+ if self.decaylevel > -90.0:
+ decaylevelpct = self.iec_scale(self.decaylevel)
+ decaywidth = int(vumeter_width * (decaylevelpct/100))
+ self.window.draw_line(self.yellow_gc,
+ self.leftborder + decaywidth,
+ self.topborder,
+ self.leftborder + decaywidth,
+ self.topborder + vumeter_height)
+
+ # draw tick marks
+ # - 90.0 dB
+ self.window.draw_line(self.style.black_gc, self.leftborder,
+ h - self.bottomborder, self.leftborder,
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("-90")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # -40.0 dB
+ self.window.draw_line(self.style.black_gc,
+ self.leftborder + int(0.15*vumeter_width),
+ h - self.bottomborder,
+ self.leftborder + int(0.15*vumeter_width),
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("-40")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + int(0.15*vumeter_width) - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # -30.0 dB
+ self.window.draw_line(self.style.black_gc,
+ self.leftborder + int(0.30*vumeter_width),
+ h - self.bottomborder,
+ self.leftborder + int(0.30*vumeter_width),
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("-30")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + int(0.30*vumeter_width) - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # -20.0 dB
+ self.window.draw_line(self.style.black_gc,
+ self.leftborder + int(0.50*vumeter_width),
+ h - self.bottomborder,
+ self.leftborder + int(0.50*vumeter_width),
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("-20")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + int(0.50*vumeter_width) - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # -10.0dB
+ self.window.draw_line(self.style.black_gc,
+ self.leftborder + int(0.75*vumeter_width),
+ h - self.bottomborder,
+ self.leftborder + int(0.75*vumeter_width),
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("-10")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + int(0.75*vumeter_width) - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # - 5.0dB
+ self.window.draw_line(self.style.black_gc,
+ self.leftborder + int(0.875*vumeter_width),
+ h - self.bottomborder,
+ self.leftborder + int(0.875*vumeter_width),
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("-5")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + int(0.875*vumeter_width) - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # 0.0dB
+ self.window.draw_line(self.style.black_gc,
+ self.leftborder + vumeter_width,
+ h - self.bottomborder,
+ self.leftborder + vumeter_width,
+ h - self.bottomborder + 5)
+ layout = self.create_pango_layout("0")
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + vumeter_width - int(layout_width/2),
+ h - self.bottomborder + 7, layout)
+
+ # draw the value to the right
+ layout = self.create_pango_layout("%.2fdB" % self.peaklevel)
+ layout_width, layout_height = layout.get_pixel_size()
+ self.window.draw_layout(self.style.black_gc,
+ self.leftborder + vumeter_width + 5,
+ self.topborder + int(vumeter_height/2 - layout_height/2),
+ layout)
+
+gobject.type_register(FVUMeter)
--- /dev/null
+#!/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 signal=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()
projects / platform / upstream / gstreamer.git / commitdiff