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
|
/*
* -*- Mode:Vala; indent-tabs-mode:t; tab-width:4; encoding:utf8 -*-
*
* Copyright 2015 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:
* Charles Kerr <charles.kerr@canonical.com>
*/
using PulseAudio;
public abstract class VolumeWarning : Object
{
// true if headphones are in use
public bool headphones_active { get; set; default = false; }
// true if the warning dialog is being shown
public bool active { get; protected set; default = false; }
// true if we're playing unapproved loud multimedia over headphones
public bool high_volume { get; protected set; default = false; }
public enum Key {
VOLUME_UP,
VOLUME_DOWN
}
public void user_keypress (Key key) {
if ((key == Key.VOLUME_DOWN) && active) {
_notification.close ();
on_user_response (IndicatorSound.WarnNotification.Response.CANCEL);
}
}
public VolumeWarning (IndicatorSound.Options options) {
_options = options;
init_high_volume ();
init_approved ();
_notification.user_responded.connect ((n, r) => on_user_response (r));
}
~VolumeWarning () {
clear_timer (ref _approved_timer);
}
/***
****
***/
// true if the user has approved high volumes recently
protected bool approved { get; set; default = false; }
// true if multimedia is currently playing
protected bool multimedia_active { get; set; default = false; }
/* Cached value of the multimedia volume reported by pulse.
Setting this only updates the cache -- to change the volume,
use sound_system_set_multimedia_volume.
NB: This PulseAudio.Volume is typed as uint to unconfuse valac. */
protected uint multimedia_volume { get; set; default = PulseAudio.Volume.INVALID; }
protected abstract void sound_system_set_multimedia_volume (PulseAudio.Volume volume);
protected void clear_timer (ref uint timer) {
if (timer != 0) {
Source.remove (timer);
timer = 0;
}
}
private IndicatorSound.Options _options;
/**
*** HIGH VOLUME PROPERTY
**/
private void init_high_volume () {
const string self_keys[] = {
"multimedia-volume",
"multimedia-active",
"headphones-active",
"high-volume-approved"
};
foreach (var key in self_keys)
this.notify[key].connect (() => update_high_volume ());
const string options_keys[] = {
"loud-volume",
"loud-warning-enabled"
};
foreach (var key in options_keys)
_options.notify[key].connect (() => update_high_volume ());
update_high_volume ();
}
private void update_high_volume () {
var newval = _options.loud_warning_enabled
&& headphones_active
&& multimedia_active
&& !approved
&& (multimedia_volume != PulseAudio.Volume.INVALID)
// from the sound specs:
// "Whenever you increase volume,..., such that acoustic output would be MORE than 85 dB
&& (multimedia_volume > _options.loud_volume);
if (high_volume != newval) {
debug ("changing high_volume from %d to %d", (int)high_volume, (int)newval);
if (newval && !active)
activate ();
high_volume = newval;
}
}
/**
*** HIGH VOLUME APPROVED PROPERTY
**/
private Settings _settings = new Settings ("org.ayatana.indicator.sound");
private static const string TTL_KEY = "warning-volume-confirmation-ttl";
private uint _approved_timer = 0;
private int64 _approved_at = 0;
private int64 _approved_ttl_usec = 0;
private void approve_high_volume () {
_approved_at = GLib.get_monotonic_time ();
update_approved ();
update_approved_timer ();
}
private void init_approved () {
_settings.changed[TTL_KEY].connect (() => update_approved_cache ());
update_approved_cache ();
}
private void update_approved_cache () {
_approved_ttl_usec = _settings.get_int (TTL_KEY);
_approved_ttl_usec *= 1000000;
update_approved ();
update_approved_timer ();
}
private void update_approved_timer () {
clear_timer (ref _approved_timer);
if (_approved_at == 0)
return;
int64 expires_at = _approved_at + _approved_ttl_usec;
int64 now = GLib.get_monotonic_time ();
if (expires_at > now) {
var seconds_left = 1 + ((expires_at - now) / 1000000);
_approved_timer = Timeout.add_seconds ((uint)seconds_left, () => {
_approved_timer = 0;
update_approved ();
return Source.REMOVE;
});
}
}
private void update_approved () {
var new_approved = calculate_approved ();
if (approved != new_approved) {
debug ("changing approved from %d to %d", (int)approved, (int)new_approved);
approved = new_approved;
}
}
private bool calculate_approved () {
int64 now = GLib.get_monotonic_time ();
return (_approved_at != 0)
&& (_approved_at + _approved_ttl_usec >= now);
}
// NOTIFICATION
private IndicatorSound.WarnNotification _notification = new IndicatorSound.WarnNotification ();
private PulseAudio.Volume _ok_volume = PulseAudio.Volume.INVALID;
protected virtual void preshow () {}
private void activate () {
preshow ();
_ok_volume = multimedia_volume;
_notification.show ();
this.active = true;
// lower the volume to just the warning level
// from the sound specs:
// "Whenever you increase volume,..., such that acoustic output would be MORE than 85 dB
sound_system_set_multimedia_volume (_options.loud_volume);
}
private void on_user_response (IndicatorSound.WarnNotification.Response response) {
this.active = false;
if (response == IndicatorSound.WarnNotification.Response.OK) {
approve_high_volume ();
sound_system_set_multimedia_volume (_ok_volume);
} else {
this.cancel_pressed (this.volume_to_double(_options.loud_volume));
}
_ok_volume = PulseAudio.Volume.INVALID;
}
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);
}
public signal void cancel_pressed (double cancel_volume);
}
|
