--- /dev/null
+#!/usr/bin/env python
+
+# 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()
+
git://git.alsa-project.org / alsa-tools.git / commitdiff