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# Copyright (C) 2006-2007 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import logging
import dbus
import gobject
import gst
import gst.interfaces
from hardware.nmclient import NMClient
from sugar.profile import get_profile
from sugar import env
_HARDWARE_MANAGER_INTERFACE = 'org.freedesktop.ohm.Keystore'
_HARDWARE_MANAGER_SERVICE = 'org.freedesktop.ohm'
_HARDWARE_MANAGER_OBJECT_PATH = '/org/freedesktop/ohm/Keystore'
COLOR_MODE = 0
B_AND_W_MODE = 1
VOL_CHANGE_INCREMENT_RECOMMENDATION = 10
class HardwareManager(gobject.GObject):
__gsignals__ = {
'muted-changed' : (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_BOOLEAN, gobject.TYPE_BOOLEAN])),
'volume-changed': (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
([gobject.TYPE_INT, gobject.TYPE_INT])),
}
def __init__(self):
gobject.GObject.__init__(self)
bus = dbus.SystemBus()
proxy = bus.get_object(_HARDWARE_MANAGER_SERVICE,
_HARDWARE_MANAGER_OBJECT_PATH,
follow_name_owner_changes=True)
self._service = dbus.Interface(proxy, _HARDWARE_MANAGER_INTERFACE)
self._mixer = gst.element_factory_make('alsamixer')
self._mixer.set_state(gst.STATE_PAUSED)
self._master = None
for track in self._mixer.list_tracks():
if track.flags & gst.interfaces.MIXER_TRACK_MASTER:
self._master = track
def __muted_changed_cb(self, old_state, new_state):
if old_state != new_state:
self.emit('muted-changed', old_state, new_state)
def __volume_changed_cb(self, old_volume, new_volume):
if old_volume != new_volume:
self.emit('volume-changed', old_volume, new_volume)
def get_muted(self):
if not self._mixer or not self._master:
logging.error('Cannot get the mute status')
return True
return self._master.flags & gst.interfaces.MIXER_TRACK_MUTE \
== gst.interfaces.MIXER_TRACK_MUTE
def get_volume(self):
if not self._mixer or not self._master:
logging.error('Cannot get the volume')
return 0
max_volume = self._master.max_volume
min_volume = self._master.min_volume
volumes = self._mixer.get_volume(self._master)
#sometimes we get a spurious zero from one/more channel(s)
#TODO: consider removing this when trac #6933 is resolved
nonzero_volumes = [v for v in volumes if v > 0]
if len(nonzero_volumes) > 0:
#we could just pick the first nonzero volume, but this converges
volume = sum(nonzero_volumes) / len(nonzero_volumes)
return volume * 100.0 / (max_volume - min_volume) + min_volume
else:
return 0
def set_volume(self, new_volume):
if not self._mixer or not self._master:
logging.error('Cannot set the volume')
return
if new_volume < 0 or new_volume > 100:
logging.error('Trying to set an invalid volume value.')
return
old_volume = self.get_volume()
max_volume = self._master.max_volume
min_volume = self._master.min_volume
new_volume_mixer_range = min_volume + \
(new_volume * ((max_volume - min_volume) / 100.0))
volume_list = [ new_volume_mixer_range ] * self._master.num_channels
#sometimes alsa sets one/more channels' volume to zero instead
# of what we asked for, so try a few times
#TODO: consider removing this loop when trac #6934 is resolved
last_volumes_read = [0]
read_count = 0
while (0 in last_volumes_read) and (read_count < 3):
self._mixer.set_volume(self._master, tuple(volume_list))
last_volumes_read = self._mixer.get_volume(self._master)
read_count += 1
self.emit('volume-changed', old_volume, new_volume)
def set_muted(self, new_state):
if not self._mixer or not self._master:
logging.error('Cannot mute the audio channel')
return
old_state = self.get_muted()
self._mixer.set_mute(self._master, new_state)
self.emit('muted-changed', old_state, new_state)
def startup(self):
if env.is_emulator() is False:
profile = get_profile()
self.set_volume(profile.sound_volume)
def shutdown(self):
if env.is_emulator() is False:
profile = get_profile()
profile.sound_volume = self.get_volume()
profile.save()
def set_dcon_freeze(self, frozen):
try:
self._service.SetKey("display.dcon_freeze", frozen)
except dbus.DBusException:
logging.error('Cannot unfreeze the DCON')
def set_display_mode(self, mode):
try:
self._service.SetKey("display.dcon_mode", mode)
except dbus.DBusException:
logging.error('Cannot change DCON mode')
def set_display_brightness(self, level):
try:
self._service.SetKey("backlight.hardware_brightness", level)
except dbus.DBusException:
logging.error('Cannot set display brightness')
def get_display_brightness(self):
try:
return self._service.GetKey("backlight.hardware_brightness")
except dbus.DBusException:
logging.error('Cannot get display brightness')
return 0
def get_manager():
return _manager
def get_network_manager():
return _network_manager
_manager = HardwareManager()
try:
_network_manager = NMClient()
except dbus.DBusException, e:
_network_manager = None
logging.info('Network manager service not found.')
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