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/*
* -*- Mode:Vala; indent-tabs-mode:t; tab-width:4; encoding:utf8 -*-
* Copyright 2013 Canonical Ltd.
*
* 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; version 3.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Authors:
* Alberto Ruiz <alberto.ruiz@canonical.com>
*/
using PulseAudio;
[CCode(cname="pa_cvolume_set", cheader_filename = "pulse/volume.h")]
extern unowned PulseAudio.CVolume? vol_set (PulseAudio.CVolume? cv, uint channels, PulseAudio.Volume v);
[DBus (name="com.canonical.UnityGreeter.List")]
interface GreeterListInterface : Object
{
public abstract async string get_active_entry () throws IOError;
public signal void entry_selected (string entry_name);
}
public class VolumeControl : Object
{
/* this is static to ensure it being freed after @context (loop does not have ref counting) */
private static PulseAudio.GLibMainLoop loop;
private uint _reconnect_timer = 0;
private PulseAudio.Context context;
private bool _mute = true;
private double _volume = 0.0;
private double _mic_volume = 0.0;
private DBusProxy _user_proxy;
private GreeterListInterface _greeter_proxy;
private Cancellable _mute_cancellable;
private Cancellable _volume_cancellable;
public signal void volume_changed (double v);
public signal void mic_volume_changed (double v);
/** true when connected to the pulse server */
public bool ready { get; set; }
/** true when a microphone is active **/
public bool active_mic { get; private set; default = false; }
public VolumeControl ()
{
if (loop == null)
loop = new PulseAudio.GLibMainLoop ();
_mute_cancellable = new Cancellable ();
_volume_cancellable = new Cancellable ();
setup_accountsservice.begin ();
this.reconnect_to_pulse ();
}
~VolumeControl ()
{
if (_reconnect_timer != 0) {
Source.remove (_reconnect_timer);
}
}
/* PulseAudio logic*/
private void context_events_cb (Context c, Context.SubscriptionEventType t, uint32 index)
{
switch (t & Context.SubscriptionEventType.FACILITY_MASK)
{
case Context.SubscriptionEventType.SINK:
update_sink ();
break;
case Context.SubscriptionEventType.SOURCE:
update_source ();
break;
case Context.SubscriptionEventType.SOURCE_OUTPUT:
switch (t & Context.SubscriptionEventType.TYPE_MASK)
{
case Context.SubscriptionEventType.NEW:
c.get_source_output_info (index, source_output_info_cb);
break;
case Context.SubscriptionEventType.REMOVE:
this.active_mic = false;
break;
}
break;
}
}
private void sink_info_cb_for_props (Context c, SinkInfo? i, int eol)
{
if (i == null)
return;
if (_mute != (bool)i.mute)
{
_mute = (bool)i.mute;
this.notify_property ("mute");
}
if (_volume != volume_to_double (i.volume.values[0]))
{
_volume = volume_to_double (i.volume.values[0]);
volume_changed (_volume);
}
}
private void source_info_cb (Context c, SourceInfo? i, int eol)
{
if (i == null)
return;
if (_mic_volume != volume_to_double (i.volume.values[0]))
{
_mic_volume = volume_to_double (i.volume.values[0]);
mic_volume_changed (_mic_volume);
}
}
private void server_info_cb_for_props (Context c, ServerInfo? i)
{
if (i == null)
return;
context.get_sink_info_by_name (i.default_sink_name, sink_info_cb_for_props);
}
private void update_sink ()
{
context.get_server_info (server_info_cb_for_props);
}
private void update_source_get_server_info_cb (PulseAudio.Context c, PulseAudio.ServerInfo? i) {
if (i != null)
context.get_source_info_by_name (i.default_source_name, source_info_cb);
}
private void update_source ()
{
context.get_server_info (update_source_get_server_info_cb);
}
private void source_output_info_cb (Context c, SourceOutputInfo? i, int eol)
{
if (i == null)
return;
var role = i.proplist.gets (PulseAudio.Proplist.PROP_MEDIA_ROLE);
if (role == "phone" || role == "production")
this.active_mic = true;
}
private void context_state_callback (Context c)
{
switch (c.get_state ()) {
case Context.State.READY:
c.subscribe (PulseAudio.Context.SubscriptionMask.SINK |
PulseAudio.Context.SubscriptionMask.SOURCE |
PulseAudio.Context.SubscriptionMask.SOURCE_OUTPUT);
c.set_subscribe_callback (context_events_cb);
update_sink ();
update_source ();
this.ready = true;
break;
case Context.State.FAILED:
case Context.State.TERMINATED:
if (_reconnect_timer == 0)
_reconnect_timer = Timeout.add_seconds (2, reconnect_timeout);
break;
default:
this.ready = false;
break;
}
}
bool reconnect_timeout ()
{
_reconnect_timer = 0;
reconnect_to_pulse ();
return false; // G_SOURCE_REMOVE
}
void reconnect_to_pulse ()
{
if (this.ready) {
this.context.disconnect ();
this.context = null;
this.ready = false;
}
var props = new Proplist ();
props.sets (Proplist.PROP_APPLICATION_NAME, "Ubuntu Audio Settings");
props.sets (Proplist.PROP_APPLICATION_ID, "com.canonical.settings.sound");
props.sets (Proplist.PROP_APPLICATION_ICON_NAME, "multimedia-volume-control");
props.sets (Proplist.PROP_APPLICATION_VERSION, "0.1");
this.context = new PulseAudio.Context (loop.get_api(), null, props);
this.context.set_state_callback (context_state_callback);
if (context.connect(null, Context.Flags.NOFAIL, null) < 0)
warning( "pa_context_connect() failed: %s\n", PulseAudio.strerror(context.errno()));
}
void sink_info_list_callback_set_mute (PulseAudio.Context context, PulseAudio.SinkInfo? sink, int eol) {
if (sink != null)
context.set_sink_mute_by_index (sink.index, true, null);
}
void sink_info_list_callback_unset_mute (PulseAudio.Context context, PulseAudio.SinkInfo? sink, int eol) {
if (sink != null)
context.set_sink_mute_by_index (sink.index, false, null);
}
/* Mute operations */
bool set_mute_internal (bool mute)
{
return_val_if_fail (context.get_state () == Context.State.READY, false);
if (_mute != mute) {
if (mute)
context.get_sink_info_list (sink_info_list_callback_set_mute);
else
context.get_sink_info_list (sink_info_list_callback_unset_mute);
return true;
} else {
return false;
}
}
public void set_mute (bool mute)
{
if (set_mute_internal (mute))
sync_mute_to_accountsservice.begin (mute);
}
public void toggle_mute ()
{
this.set_mute (!this._mute);
}
public bool mute
{
get
{
return this._mute;
}
}
/* Volume operations */
private static PulseAudio.Volume double_to_volume (double vol)
{
double tmp = (double)(PulseAudio.Volume.NORM - PulseAudio.Volume.MUTED) * vol;
return (PulseAudio.Volume)tmp + PulseAudio.Volume.MUTED;
}
private static double volume_to_double (PulseAudio.Volume vol)
{
double tmp = (double)(vol - PulseAudio.Volume.MUTED);
return tmp / (double)(PulseAudio.Volume.NORM - PulseAudio.Volume.MUTED);
}
private void set_volume_success_cb (Context c, int success)
{
if ((bool)success)
volume_changed (_volume);
}
private void sink_info_set_volume_cb (Context c, SinkInfo? i, int eol)
{
if (i == null)
return;
unowned CVolume cvol = vol_set (i.volume, 1, double_to_volume (_volume));
c.set_sink_volume_by_index (i.index, cvol, set_volume_success_cb);
}
private void server_info_cb_for_set_volume (Context c, ServerInfo? i)
{
if (i == null)
{
warning ("Could not get PulseAudio server info");
return;
}
context.get_sink_info_by_name (i.default_sink_name, sink_info_set_volume_cb);
}
bool set_volume_internal (double volume)
{
return_val_if_fail (context.get_state () == Context.State.READY, false);
if (_volume != volume) {
_volume = volume;
context.get_server_info (server_info_cb_for_set_volume);
return true;
} else {
return false;
}
}
public void set_volume (double volume)
{
if (set_volume_internal (volume))
sync_volume_to_accountsservice.begin (volume);
}
void set_mic_volume_success_cb (Context c, int success)
{
if ((bool)success)
mic_volume_changed (_mic_volume);
}
void set_mic_volume_get_server_info_cb (PulseAudio.Context c, PulseAudio.ServerInfo? i) {
if (i != null) {
unowned CVolume cvol = CVolume ();
cvol = vol_set (cvol, 1, double_to_volume (_mic_volume));
c.set_source_volume_by_name (i.default_source_name, cvol, set_mic_volume_success_cb);
}
}
public void set_mic_volume (double volume)
{
return_if_fail (context.get_state () == Context.State.READY);
_mic_volume = volume;
context.get_server_info (set_mic_volume_get_server_info_cb);
}
public double get_volume ()
{
return _volume;
}
public double get_mic_volume ()
{
return _mic_volume;
}
/* AccountsService operations */
private void accountsservice_props_changed_cb (DBusProxy proxy, Variant changed_properties, string[] invalidated_properties)
{
Variant volume_variant = changed_properties.lookup_value ("Volume", new VariantType ("d"));
if (volume_variant != null) {
var volume = volume_variant.get_double ();
if (volume >= 0)
set_volume_internal (volume);
}
Variant mute_variant = changed_properties.lookup_value ("Muted", new VariantType ("b"));
if (mute_variant != null) {
var mute = mute_variant.get_boolean ();
set_mute_internal (mute);
}
}
private async void setup_user_proxy (string? username_in = null)
{
var username = username_in;
_user_proxy = null;
// Look up currently selected greeter user, if asked
if (username == null) {
try {
username = yield _greeter_proxy.get_active_entry ();
if (username == "" || username == null)
return;
} catch (GLib.Error e) {
warning ("unable to find Accounts path for user %s: %s", username, e.message);
return;
}
}
// Get master AccountsService object
DBusProxy accounts_proxy;
try {
accounts_proxy = yield DBusProxy.create_for_bus (BusType.SYSTEM, DBusProxyFlags.DO_NOT_LOAD_PROPERTIES | DBusProxyFlags.DO_NOT_CONNECT_SIGNALS, null, "org.freedesktop.Accounts", "/org/freedesktop/Accounts", "org.freedesktop.Accounts");
} catch (GLib.Error e) {
warning ("unable to get greeter proxy: %s", e.message);
return;
}
// Find user's AccountsService object
try {
var user_path_variant = yield accounts_proxy.call ("FindUserByName", new Variant ("(s)", username), DBusCallFlags.NONE, -1);
string user_path;
user_path_variant.get ("(o)", out user_path);
_user_proxy = yield DBusProxy.create_for_bus (BusType.SYSTEM, DBusProxyFlags.GET_INVALIDATED_PROPERTIES, null, "org.freedesktop.Accounts", user_path, "com.ubuntu.AccountsService.Sound");
} catch (GLib.Error e) {
warning ("unable to find Accounts path for user %s: %s", username, e.message);
return;
}
// Listen for property changes, this will get current volume (since getting proxy loads properties)
_user_proxy.g_properties_changed.connect (accountsservice_props_changed_cb);
}
private void greeter_user_changed (string username)
{
setup_user_proxy.begin (username);
}
private async void setup_accountsservice ()
{
if (Environment.get_variable ("XDG_SESSION_CLASS") == "greeter") {
try {
_greeter_proxy = yield Bus.get_proxy (BusType.SESSION, "com.canonical.UnityGreeter", "/list");
} catch (GLib.Error e) {
warning ("unable to get greeter proxy: %s", e.message);
return;
}
_greeter_proxy.entry_selected.connect (greeter_user_changed);
yield setup_user_proxy ();
} else {
// We are in a user session. We just need our own proxy
var username = Environment.get_variable ("USER");
if (username != "" && username != null) {
yield setup_user_proxy (username);
}
}
}
private async void sync_mute_to_accountsservice (bool mute)
{
if (_user_proxy == null)
return;
_mute_cancellable.cancel ();
_mute_cancellable.reset ();
try {
yield _user_proxy.get_connection ().call (_user_proxy.get_name (), _user_proxy.get_object_path (), "org.freedesktop.DBus.Properties", "Set", new Variant ("(ssv)", _user_proxy.get_interface_name (), "Muted", new Variant ("b", mute)), null, DBusCallFlags.NONE, -1, _mute_cancellable);
} catch (GLib.Error e) {
warning ("unable to sync mute to AccountsService: %s", e.message);
}
}
private async void sync_volume_to_accountsservice (double volume)
{
if (_user_proxy == null)
return;
_volume_cancellable.cancel ();
_volume_cancellable.reset ();
try {
yield _user_proxy.get_connection ().call (_user_proxy.get_name (), _user_proxy.get_object_path (), "org.freedesktop.DBus.Properties", "Set", new Variant ("(ssv)", _user_proxy.get_interface_name (), "Volume", new Variant ("d", volume)), null, DBusCallFlags.NONE, -1, _volume_cancellable);
} catch (GLib.Error e) {
warning ("unable to sync volume to AccountsService: %s", e.message);
}
}
}
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