#!/usr/bin/python2
# hwmixvolume - ALSA hardware mixer volume control applet
# Copyright (c) 2009-2010 Clemens Ladisch
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
import gobject, gtk
from pyalsa import alsacard, alsahcontrol
INTF_PCM = alsahcontrol.interface_id['PCM']
INTF_MIXER = alsahcontrol.interface_id['MIXER']
TYPE_INTEGER = alsahcontrol.element_type['INTEGER']
EVENT_VALUE = alsahcontrol.event_mask['VALUE']
EVENT_INFO = alsahcontrol.event_mask['INFO']
EVENT_REMOVE = alsahcontrol.event_mask_remove
class Stream:
def __init__(self, element, parent):
self.element = element
self.element.set_callback(self)
self.parent = parent
self.label = None
self.scales = []
self.adjustments = []
self.callback(self.element, EVENT_INFO)
def destroy(self):
self.deactivate()
def callback(self, e, mask):
if mask == EVENT_REMOVE:
self.deactivate()
elif (mask & EVENT_INFO) != 0:
info = alsahcontrol.Info(self.element)
if info.is_inactive:
self.deactivate()
else:
self.activate()
elif (mask & EVENT_VALUE) != 0:
self.update_scales_from_ctl()
def activate(self):
if self.label:
return
info = alsahcontrol.Info(self.element)
value = alsahcontrol.Value(self.element)
value.read()
values = value.get_tuple(TYPE_INTEGER, info.count)
self.label = gtk.Label(self.get_label(info))
self.label.set_single_line_mode(True)
self.parent.scales_vbox.pack_start(self.label, expand=False)
for i in range(info.count):
adj = gtk.Adjustment(value=values[i],
lower=info.min, upper=info.max,
step_incr=1,
page_incr=(info.max-info.min+1)/8)
adj.connect('value-changed', self.update_ctl_from_scale, i)
scale = gtk.HScale(adj)
scale.set_draw_value(False)
self.parent.scales_vbox.pack_start(scale, expand=False)
self.scales.append(scale)
self.adjustments.append(adj)
self.parent.scales_vbox.show_all()
self.parent.update_msg_label()
def deactivate(self):
if not self.label:
return
self.label.destroy()
for s in self.scales:
s.destroy()
self.label = None
self.scales = []
self.adjustments = []
self.parent.update_msg_label()
def update_scales_from_ctl(self):
if not self.label:
return
count = len(self.adjustments)
value = alsahcontrol.Value(self.element)
value.read()
values = value.get_tuple(TYPE_INTEGER, count)
for i in range(count):
self.adjustments[i].set_value(values[i])
def update_ctl_from_scale(self, adj, index):
scale_value = adj.get_value()
value_to_set = int(round(adj.get_value()))
count = len(self.adjustments)
value = alsahcontrol.Value(self.element)
if self.parent.lock_check.get_active():
values = [value_to_set for i in range(count)]
else:
value.read()
values = value.get_array(TYPE_INTEGER, count)
values[index] = value_to_set
value.set_array(TYPE_INTEGER, values)
value.write()
if value_to_set != scale_value:
adj.set_value(value_to_set)
def get_label(self, info):
pid = self.get_pid(info)
if pid:
cmdline = self.get_pid_cmdline(pid)
if cmdline:
return cmdline
else:
return "PID %d" % pid
else:
name = info.name
if name[-7:] == " Volume":
name = name[:-7]
if name[-9:] == " Playback":
name = name[:-9]
return name
def get_pid(self, info):
card = self.parent.current_card
device = info.device
subdevice = info.subdevice
if subdevice == 0:
subdevice = info.index
filename = "/proc/asound/card%d/pcm%dp/sub%d/status" % (card, device, subdevice)
try:
f = open(filename, "r")
except IOError:
return None
try:
for line in f.readlines():
if line[:9] == "owner_pid":
return int(line.split(':')[1].strip())
finally:
f.close()
return None
def get_pid_cmdline(self, pid):
try:
f = open("/proc/%d/cmdline" % pid, "r")
except IOError:
return None
try:
cmdline = f.read()
finally:
f.close()
return cmdline.replace('\x00', ' ').strip()
class MixerWindow(gtk.Window):
card_numbers = alsacard.card_list()
current_card = -1
hcontrol = None
scales_vbox = None
msg_label = None
streams = []
hctl_sources = []
def __init__(self):
gtk.Window.__init__(self)
self.connect('destroy', lambda w: gtk.main_quit())
self.set_title("Hardware Mixer Volumes")
vbox = gtk.VBox()
self.add(vbox)
hbox = gtk.HBox()
vbox.pack_start(hbox, expand=False)
label = gtk.Label("_Sound Card: ")
label.set_use_underline(True)
hbox.pack_start(label, expand=False)
combo = gtk.combo_box_new_text()
for i in self.card_numbers:
str = "%d: %s" % (i, alsacard.card_get_name(i))
combo.append_text(str)
if len(self.card_numbers) > 0:
combo.set_active(0)
combo.connect('changed', lambda c: self.change_card(self.card_numbers[combo.get_active()]))
hbox.pack_start(combo)
label.set_mnemonic_widget(combo)
self.lock_check = gtk.CheckButton(label="_Lock Channels")
self.lock_check.set_active(True)
vbox.pack_start(self.lock_check, expand=False)
scrollwin = gtk.ScrolledWindow()
scrollwin.set_policy(hscrollbar_policy=gtk.POLICY_NEVER, vscrollbar_policy=gtk.POLICY_AUTOMATIC)
scrollwin.set_shadow_type(gtk.SHADOW_NONE)
vbox.pack_start(scrollwin)
self.scales_vbox = gtk.VBox()
scrollwin.add_with_viewport(self.scales_vbox)
label = gtk.Label()
label.set_single_line_mode(True)
line_height = label.size_request()[1]
label.destroy()
scale = gtk.HScale()
scale.set_draw_value(False)
line_height += scale.size_request()[1]
scale.destroy()
# always have space for at least four sliders
scrollwin.set_size_request(width=-1, height=line_height*4+4)
# TODO: select the default card or the first card with stream controls
if len(self.card_numbers) > 0:
self.change_card(self.card_numbers[0])
self.update_msg_label()
self.show_all()
def change_card(self, cardnum):
for s in self.hctl_sources:
gobject.source_remove(s)
self.hctl_sources = []
self.hcontrol = self.open_hcontrol_for_card(cardnum)
for s in self.streams:
s.destroy()
self.streams = []
self.current_card = cardnum
if not self.hcontrol:
self.update_msg_label()
return
for id in self.hcontrol.list():
if not self.is_stream_elem(id):
continue
elem = alsahcontrol.Element(self.hcontrol, id[0])
info = alsahcontrol.Info(elem)
if not self.is_stream_info(info):
continue
stream = Stream(elem, self)
self.streams.append(stream)
for fd,condition in self.hcontrol.poll_fds:
self.hctl_sources.append(gobject.io_add_watch(fd, condition, self.hctl_io_callback))
self.update_msg_label()
self.scales_vbox.show_all()
def update_msg_label(self):
needs_msg = len(self.scales_vbox.get_children()) < 2
has_msg = self.msg_label
if has_msg and not needs_msg:
self.msg_label.destroy()
self.msg_label = None
elif needs_msg:
if len(self.streams) > 0:
msg = "There are no open streams."
else:
msg = "This card does not have stream controls."
if not has_msg:
self.msg_label = gtk.Label(msg)
self.scales_vbox.pack_start(self.msg_label)
self.scales_vbox.show_all()
elif self.msg_label.get_text() != msg:
self.msg_label.set_text(msg)
def open_hcontrol_for_card(self, cardnum):
devname = "hw:CARD=" + str(cardnum)
try:
hc = alsahcontrol.HControl(name=devname,
mode=alsahcontrol.open_mode['NONBLOCK'])
except:
# TODO: alsa error msg
dlg = gtk.MessageDialog(self,
gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT,
gtk.MESSAGE_ERROR, gtk.BUTTONS_OK,
"Cannot open sound card control device.")
dlg.run()
dlg.destroy()
return None
return hc
def is_stream_elem(self, id):
return ((id[1] == INTF_PCM and
id[4] in ("PCM Playback Volume", "EMU10K1 PCM Volume")) or
(id[1] == INTF_MIXER and
id[4] == "VIA DXS Playback Volume"))
def is_stream_info(self, info):
return info.is_readable and info.is_writable and info.type == TYPE_INTEGER
def hctl_io_callback(self, source, condition):
self.hcontrol.handle_events()
return True
def main():
MixerWindow()
gtk.main()
main()