aboutsummaryrefslogtreecommitdiff
path: root/src/volume-warning.vala
blob: 5aca45ed2239926d8b7fc7d298dd2750b1ca387d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
/*
 * -*- 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;
using Notify;
using Gee;

[CCode(cname="pa_cvolume_set", cheader_filename = "pulse/volume.h")]
extern unowned PulseAudio.CVolume? vol_set2 (PulseAudio.CVolume? cv, uint channels, PulseAudio.Volume v);

public class VolumeWarning : Object
{
	// true if the warning dialog is currently active
	public bool active { get; public set; default = false; }

	// true if we're playing unapproved loud multimedia over headphones
	public bool high_volume { get; protected set; default = false; }

	// true if the active sink input has its role property set to multimedia
	protected bool multimedia_active { get; set; default = false; }

	// true if the user has approved high volumes recently
	protected bool high_volume_approved { get; set; default = false; }

	protected PulseAudio.Volume multimedia_volume { get; set; default = PulseAudio.Volume.MUTED; }

	public enum Key {
		VOLUME_UP,
		VOLUME_DOWN
	}

	public void user_keypress(Key key) {
		if (key == Key.VOLUME_DOWN)
			on_user_response(IndicatorSound.WarnNotification.Response.CANCEL);
	}

	public VolumeWarning (IndicatorSound.Options options)
	{
		_options = options;

		if (loop == null)
			loop = new PulseAudio.GLibMainLoop ();

		init_all_properties();

		this.reconnect_to_pulse ();

		_notification = new IndicatorSound.WarnNotification();
		_notification.user_responded.connect((n, response) => on_user_response(response));
        }

	/***
	****
	***/

	/* this is static to ensure it being freed after @context (loop does not have ref counting) */
	private static PulseAudio.GLibMainLoop loop;

	private PulseAudio.Context context;
	// FIXME: what to do with this now?
	private bool   _ignore_warning_this_time = false;
	private Settings _settings = new Settings ("com.canonical.indicator.sound");

	/* Used by the pulseaudio stream restore extension */
	private DBusConnection _pconn;
	/* Need both the list and hash so we can retrieve the last known sink-input after
	 * releasing the current active one (restoring back to the previous known role) */
	private Gee.ArrayList<uint32> _sink_input_list = new Gee.ArrayList<uint32> ();
	private HashMap<uint32, string> _sink_input_hash = new HashMap<uint32, string> ();
	private bool _pulse_use_stream_restore = false;
	private int32 _active_sink_input = -1;
	private string[] _valid_roles = {"multimedia", "alert", "alarm", "phone"};

	private string? _objp_role_multimedia = null;
	private string? _objp_role_alert = null;
	private string? _objp_role_alarm = null;
	private string? _objp_role_phone = null;
	private uint _pa_volume_sig_count = 0;

	private bool _active_port_headphones = false;
	private VolumeControl.ActiveOutput _active_output = VolumeControl.ActiveOutput.SPEAKERS;
	private IndicatorSound.Options _options;

	private void init_all_properties()
	{
		init_high_volume();
		init_high_volume_approved();
	}

	~VolumeWarning ()
	{
		stop_all_timers();
	}

	private void stop_all_timers()
	{
		stop_reconnect_timer();
		stop_high_volume_approved_timer();
		stop_clamp_to_loud_timeout();
	}

	/* 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.SINK_INPUT:
				switch (t & Context.SubscriptionEventType.TYPE_MASK)
				{
					case Context.SubscriptionEventType.NEW:
						c.get_sink_input_info (index, handle_new_sink_input_cb);
						break;

					case Context.SubscriptionEventType.CHANGE:
						c.get_sink_input_info (index, handle_changed_sink_input_cb);
						break;

					case Context.SubscriptionEventType.REMOVE:
						remove_sink_input_from_list (index);
						break;
					default:
						debug ("Sink input event not known.");
						break;
				}
				break;

			case Context.SubscriptionEventType.SOURCE:
			case Context.SubscriptionEventType.SOURCE_OUTPUT:
				break;
		}
	}

	private void sink_info_cb_for_props (Context c, SinkInfo? i, int eol)
	{
		if (i == null)
			return;

		var old_active_output = active_output;
		var new_active_output = VolumeControlPulse.calculate_active_output(i);

		_active_output = new_active_output;

		switch (new_active_output) {
			case VolumeControl.ActiveOutput.HEADPHONES:
			case VolumeControl.ActiveOutput.USB_HEADPHONES:
			case VolumeControl.ActiveOutput.HDMI_HEADPHONES:
			case VolumeControl.ActiveOutput.BLUETOOTH_HEADPHONES:
				_active_port_headphones = true;
				break;

			default:
				_active_port_headphones = false;
				break;
		}

		if ((new_active_output != old_active_output)
				&& (new_active_output != VolumeControl.ActiveOutput.CALL_MODE)
				&& (old_active_output != VolumeControl.ActiveOutput.CALL_MODE))
			update_high_volume();
	}

	private void server_info_cb_for_props (Context c, ServerInfo? i)
	{
		if (i != null)
			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 DBusMessage pulse_dbus_filter (DBusConnection connection, owned DBusMessage message, bool incoming)
	{
		if (message.get_message_type() == DBusMessageType.SIGNAL)
		{
			var member = message.get_member();
			var path = message.get_path();

			if ((member == "VolumeUpdated") && (path == _multimedia_objp))
			{
				Variant body = message.get_body ();
				Variant varray = body.get_child_value (0);
				uint32 type = 0, lvolume = 0;
				VariantIter iter = varray.iterator ();
				iter.next ("(uu)", &type, &lvolume);
				if (multimedia_volume != lvolume)
					multimedia_volume = lvolume;
			}
			else if (((member == "NewEntry") || (member == "EntryRemoved")) && (path == "/org/pulseaudio/stream_restore1"))
			{
				update_multimedia_objp();
			}
		}

		return message;
	}

	private async void update_active_sink_input (int32 index)
	{
		if ((index == -1) || (index != _active_sink_input && index in _sink_input_list)) {
			string sink_input_objp = _objp_role_alert;
			if (index != -1)
				sink_input_objp = _sink_input_hash.get (index);
			_active_sink_input = index;

			multimedia_active = (index != -1)
				&& (_sink_input_hash.get(index) == _objp_role_multimedia);

		}
	}

	private void add_sink_input_into_list (SinkInputInfo sink_input)
	{
		/* We're only adding ones that are not corked and with a valid role */
		var role = sink_input.proplist.gets (PulseAudio.Proplist.PROP_MEDIA_ROLE);

		if (role != null && role in _valid_roles) {
			if (sink_input.corked == 0 || role == "phone") {
				_sink_input_list.insert (0, sink_input.index);
				switch (role)
				{
					case "multimedia":
						_sink_input_hash.set (sink_input.index, _objp_role_multimedia);
						break;
					case "alert":
						_sink_input_hash.set (sink_input.index, _objp_role_alert);
						break;
					case "alarm":
						_sink_input_hash.set (sink_input.index, _objp_role_alarm);
						break;
					case "phone":
						_sink_input_hash.set (sink_input.index, _objp_role_phone);
						break;
				}
				/* Only switch the active sink input in case a phone one is not active */
				if (_active_sink_input == -1 ||
						_sink_input_hash.get (_active_sink_input) != _objp_role_phone)
					update_active_sink_input.begin ((int32)sink_input.index);
			}
		}
	}

	private void remove_sink_input_from_list (uint32 index)
	{
		if (index in _sink_input_list) {
			_sink_input_list.remove (index);
			_sink_input_hash.unset (index);
			if (index == _active_sink_input) {
				if (_sink_input_list.size != 0)
					update_active_sink_input.begin ((int32)_sink_input_list.get (0));
				else
					update_active_sink_input.begin (-1);
			}
		}
	}

	private void handle_new_sink_input_cb (Context c, SinkInputInfo? i, int eol)
	{
		if (i == null)
			return;

		add_sink_input_into_list (i);
	}

	private void handle_changed_sink_input_cb (Context c, SinkInputInfo? i, int eol)
	{
		if (i == null)
			return;

		if (i.index in _sink_input_list) {
			/* Phone stream is always corked, so handle it differently */
			if (i.corked == 1 && _sink_input_hash.get (i.index) != _objp_role_phone)
				remove_sink_input_from_list (i.index);
		} else {
			if (i.corked == 0)
				add_sink_input_into_list (i);
		}
	}

	private bool _connected_to_pulse = false;

	private uint _reconnect_timer = 0;

	private void context_state_callback (Context c)
	{
		switch (c.get_state ()) {
			case Context.State.READY:
				if (_pulse_use_stream_restore) {
					c.subscribe (PulseAudio.Context.SubscriptionMask.SINK |
							PulseAudio.Context.SubscriptionMask.SINK_INPUT |
							PulseAudio.Context.SubscriptionMask.SOURCE |
							PulseAudio.Context.SubscriptionMask.SOURCE_OUTPUT);
				} else {
					c.subscribe (PulseAudio.Context.SubscriptionMask.SINK |
							PulseAudio.Context.SubscriptionMask.SOURCE |
							PulseAudio.Context.SubscriptionMask.SOURCE_OUTPUT);
				}
				c.set_subscribe_callback (context_events_cb);
				update_sink ();
				_connected_to_pulse = true;
				break;

			case Context.State.FAILED:
			case Context.State.TERMINATED:
				if (_reconnect_timer == 0)
					_reconnect_timer = Timeout.add_seconds (2, reconnect_timeout);
				break;

			default:
				_connected_to_pulse = false;
				break;
		}
	}

	private void stop_reconnect_timer()
	{
		if (_reconnect_timer != 0) {
			Source.remove (_reconnect_timer);
			_reconnect_timer = 0;
		}
	}

	bool reconnect_timeout ()
	{
		_reconnect_timer = 0;
		reconnect_to_pulse ();
		return false; // G_SOURCE_REMOVE
	}

	private void reconnect_to_pulse ()
	{
		if (_connected_to_pulse) {
			this.context.disconnect ();
			this.context = null;
			_connected_to_pulse = false;
		}

		reconnect_pulse_dbus ();

		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);

		var server_string = Environment.get_variable("PULSE_SERVER");
		if (context.connect(server_string, Context.Flags.NOFAIL, null) < 0)
			warning( "pa_context_connect() failed: %s\n", PulseAudio.strerror(context.errno()));
	}

	private void reconnect_pulse_dbus ()
	{
		/* In case of a reconnect */
		_pulse_use_stream_restore = false;
		_pa_volume_sig_count = 0;

		_pconn = VolumeControlPulse.create_pulse_dbus_connection();
		if (_pconn == null)
			return;

		/* For pulse dbus related events */
		_pconn.add_filter (pulse_dbus_filter);

		// track the multimedia object path
		init_stream_restore.begin();

		/* Check if the 4 currently supported media roles are already available in StreamRestore
		 * Roles: multimedia, alert, alarm and phone */
		_objp_role_multimedia = VolumeControlPulse.stream_restore_get_object_path (_pconn, "sink-input-by-media-role:multimedia");
		_objp_role_alert = VolumeControlPulse.stream_restore_get_object_path (_pconn, "sink-input-by-media-role:alert");
		_objp_role_alarm = VolumeControlPulse.stream_restore_get_object_path (_pconn, "sink-input-by-media-role:alarm");
		_objp_role_phone = VolumeControlPulse.stream_restore_get_object_path (_pconn, "sink-input-by-media-role:phone");

		/* Only use stream restore if every used role is available */
		if (_objp_role_multimedia != null && _objp_role_alert != null && _objp_role_alarm != null && _objp_role_phone != null) {
			debug ("Using PulseAudio DBUS Stream Restore module");
			/* Restore volume and update default entry */
			update_active_sink_input.begin (-1);
			_pulse_use_stream_restore = true;
		}
	}

	/***
	****  Tracking the Multimedia Volume
	***/

	private async void init_stream_restore()
	{
		if (_pconn == null)
			return;

		update_multimedia_objp();

		// listen for StreamRestore1's NewEntry and EntryRemoved signals
		try {
			var builder = new VariantBuilder (new VariantType ("ao"));
			builder.add ("o", "/org/pulseaudio/stream_restore1");
			yield _pconn.call ("org.PulseAudio.Core1", "/org/pulseaudio/core1",
					"org.PulseAudio.Core1", "ListenForSignal",
					new Variant ("(sao)", "org.PulseAudio.Ext.StreamRestore1.NewEntry", builder),
					null, DBusCallFlags.NONE, -1);

			builder = new VariantBuilder (new VariantType ("ao"));
			builder.add ("o", "/org/pulseaudio/stream_restore1");
			yield _pconn.call ("org.PulseAudio.Core1", "/org/pulseaudio/core1",
					"org.PulseAudio.Core1", "ListenForSignal",
					new Variant ("(sao)", "org.PulseAudio.Ext.StreamRestore1.EntryRemoved", builder),
					null, DBusCallFlags.NONE, -1);
		} catch (GLib.Error e) {
			warning ("unable to listen for StreamRestore1 dbus signals (%s)", e.message);
		}
	}

	private void update_multimedia_objp()
	{
		var objp = VolumeControlPulse.stream_restore_get_object_path(
			_pconn,
			"sink-input-by-media-role:multimedia");
		set_multimedia_object_path.begin(objp);
	}

	private string _multimedia_objp = null;

	private async void set_multimedia_object_path(string objp)
	{
		if (_multimedia_objp == objp)
			return;

		_multimedia_objp = objp;

		// listen for RestoreEntry.VolumeUpdated from this entry
		try {
			var builder = new VariantBuilder (new VariantType ("ao"));
			builder.add ("o", _multimedia_objp);
			yield _pconn.call ("org.PulseAudio.Core1", "/org/pulseaudio/core1",
				"org.PulseAudio.Core1", "ListenForSignal",
				new Variant ("(sao)", "org.PulseAudio.Ext.StreamRestore1.RestoreEntry.VolumeUpdated", builder),
				null, DBusCallFlags.NONE, -1);
		} catch (GLib.Error e) {
			warning ("unable to listen for RestoreEntry dbus signals (%s)", e.message);
		}

		update_multimedia_volume.begin();
	}

	private async void update_multimedia_volume()
	{
		try {
			var props_variant = yield _pconn.call (
				"org.PulseAudio.Ext.StreamRestore1.RestoreEntry",
				_multimedia_objp,
				"org.freedesktop.DBus.Properties",
				"Get",
				new Variant ("(ss)", "org.PulseAudio.Ext.StreamRestore1.RestoreEntry", "Volume"),
				null,
				DBusCallFlags.NONE,
				-1);
                                Variant tmp;
			props_variant.get ("(v)", out tmp);
			uint32 type = 0, volume = 0;
			VariantIter iter = tmp.iterator ();
			iter.next ("(uu)", &type, &volume);
			if (multimedia_volume != volume)
				multimedia_volume = volume;
		} catch (GLib.Error e) {
			warning ("unable to get volume for multimedia role %s (%s)", _multimedia_objp, e.message);
		}
	}

	/***
	****  Tracking the Active Output
	***/

	private VolumeControl.ActiveOutput active_output
	{
		get
		{
			return _active_output;
		}
	}

	/** HIGH VOLUME PROPERTY **/

	public bool ignore_high_volume {
		get {
			if (_ignore_warning_this_time) {
				warning("Ignore");
				_ignore_warning_this_time = false;
				return true;
			}
			return false;
		}
		set { }
	}
	private void init_high_volume() {
		_options.loud_changed.connect(() => update_high_volume());
		update_high_volume();
	}
	private void update_high_volume() {
		var new_high_volume = calculate_high_volume();
		if (high_volume != new_high_volume) {
			debug("changing high_volume from %d to %d", (int)high_volume, (int)new_high_volume);
			high_volume = new_high_volume;
			if (high_volume && !active)
				show();
		}
	}
	private bool calculate_high_volume() {
		return calculate_high_volume_from_volume(multimedia_volume);
	}
	private bool calculate_high_volume_from_volume(PulseAudio.Volume volume) {
		return _active_port_headphones
			&& _options.is_loud_pulse(volume)
			&& multimedia_active;
	}

	/** HIGH VOLUME APPROVED PROPERTY **/

	private void approve_high_volume() {
		_high_volume_approved_at = GLib.get_monotonic_time();
		update_high_volume_approved();
		update_high_volume_approved_timer();
	}

	private uint _high_volume_approved_timer = 0;
	private int64 _high_volume_approved_at = 0;
	private int64 _high_volume_approved_ttl_usec = 0;
	private void init_high_volume_approved() {
		_settings.changed["warning-volume-confirmation-ttl"].connect(() => update_high_volume_approved_cache());
		update_high_volume_approved_cache();
	}
	private void update_high_volume_approved_cache() {
		_high_volume_approved_ttl_usec = _settings.get_int("warning-volume-confirmation-ttl");
		_high_volume_approved_ttl_usec *= 1000000;

		update_high_volume_approved();
		update_high_volume_approved_timer();
	}
	private void update_high_volume_approved_timer() {
		stop_high_volume_approved_timer();
		if (_high_volume_approved_at != 0) {
			int64 expires_at = _high_volume_approved_at + _high_volume_approved_ttl_usec;
			int64 now = GLib.get_monotonic_time();
			if (expires_at > now) {
				var seconds_left = 1 + ((expires_at - now) / 1000000);
				_high_volume_approved_timer = Timeout.add_seconds((uint)seconds_left, on_high_volume_approved_timer);
			}
		}
	}
	private void stop_high_volume_approved_timer() {
		if (_high_volume_approved_timer != 0) {
			Source.remove (_high_volume_approved_timer);
			_high_volume_approved_timer = 0;
		}
	}
	private bool on_high_volume_approved_timer() {
		_high_volume_approved_timer = 0;
		update_high_volume_approved();
		return false; /* Source.REMOVE */
	}
	private void update_high_volume_approved() {
		var new_high_volume_approved = calculate_high_volume_approved();
		if (high_volume_approved != new_high_volume_approved) {
			debug("changing high_volume_approved from %d to %d", (int)high_volume_approved, (int)new_high_volume_approved);
			high_volume_approved = new_high_volume_approved;
		}
	}
	private bool calculate_high_volume_approved() {
		int64 now = GLib.get_monotonic_time();
		return (_high_volume_approved_at != 0)
			&& (_high_volume_approved_at + _high_volume_approved_ttl_usec >= now);
	}

	protected virtual async void set_pulse_multimedia_volume(PulseAudio.Volume volume)
	{
		var objp = _multimedia_objp;
		if (objp == null)
			return;

		try {
			var builder = new VariantBuilder (new VariantType ("a(uu)"));
			builder.add ("(uu)", 0, volume);

			yield _pconn.call ("org.PulseAudio.Ext.StreamRestore1.RestoreEntry",
					objp, "org.freedesktop.DBus.Properties", "Set",
					new Variant ("(ssv)", "org.PulseAudio.Ext.StreamRestore1.RestoreEntry", "Volume", builder),
					null, DBusCallFlags.NONE, -1);

			debug ("Set multimedia volume to %d on path %s", (int)volume, objp);
		} catch (GLib.Error e) {
			warning ("unable to set volume for stream obj path %s (%s)", objp, e.message);
		}
	}

	// NOTIFICATION

	private IndicatorSound.WarnNotification _notification = new IndicatorSound.WarnNotification();

	private PulseAudio.Volume _cancel_volume = PulseAudio.Volume.INVALID;
	private PulseAudio.Volume _ok_volume = PulseAudio.Volume.INVALID;

	private void show() {
		_cancel_volume = _options.loud_volume();
		_ok_volume = multimedia_volume;
		_notification.show();
		this.active = true;
	}

	private void on_user_response(IndicatorSound.WarnNotification.Response response) {
		_notification.close();
		stop_clamp_to_loud_timeout();

		if (response == IndicatorSound.WarnNotification.Response.OK) {
			approve_high_volume();
			set_pulse_multimedia_volume.begin(_ok_volume);
		} else { // WarnNotification.CANCEL
			set_pulse_multimedia_volume.begin(_cancel_volume);
		}

		_cancel_volume = PulseAudio.Volume.INVALID;
		_ok_volume = PulseAudio.Volume.INVALID;

		this.active = false;
	}

	// VOLUME CLAMPING

	private uint _clamp_to_loud_timeout = 0;

	private void stop_clamp_to_loud_timeout() {
		if (_clamp_to_loud_timeout != 0) {
			Source.remove(_clamp_to_loud_timeout);
			_clamp_to_loud_timeout = 0;
		}
	}

	private void clamp_to_loud_soon() {
		const uint interval_msec = 200;
		if (_clamp_to_loud_timeout == 0)
			_clamp_to_loud_timeout = Timeout.add(interval_msec, clamp_to_loud_idle);
	}

	private bool clamp_to_loud_idle() {
		_clamp_to_loud_timeout = 0;
		clamp_to_loud_volume();
		return false; // Source.REMOVE;
	}

	private void clamp_to_loud_volume() {
		var loud_volume = _options.loud_volume();
		if (multimedia_volume > loud_volume) {
			debug("Clamping from %d down to %d", (int)multimedia_volume, (int)loud_volume);
			set_pulse_multimedia_volume.begin (loud_volume);
		}
	}
}