aboutsummaryrefslogtreecommitdiff
path: root/src/volume-control.vala
blob: 8c88c92e446936d463d4faa7f25622d0a199e615 (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
/*
 * 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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);

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 PulseAudio.Context context;
	private bool   _mute = true;
	private double _volume = 0.0;

	public signal void ready ();
	public signal void volume_changed (double v);

	public VolumeControl ()
	{
		if (loop == null)
			loop = new PulseAudio.GLibMainLoop ();

		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");

		context = new PulseAudio.Context (loop.get_api(), null, props);

		context.set_state_callback (notify_cb);

		if (context.connect(null, Context.Flags.NOFAIL, null) < 0)
		{
			warning( "pa_context_connect() failed: %s\n", PulseAudio.strerror(context.errno()));
			return;
		}
	}

	/* PulseAudio logic*/
	private void context_events_cb (Context c, Context.SubscriptionEventType t, uint32 index)
	{
		if ((t & Context.SubscriptionEventType.FACILITY_MASK) == Context.SubscriptionEventType.SINK)
		{
			get_properties ();
		}
	}

	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 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 get_properties ()
	{
		context.get_server_info (server_info_cb_for_props);
	}

	private void notify_cb (Context c)
	{
		if (c.get_state () == Context.State.READY)
		{
			c.subscribe (PulseAudio.Context.SubscriptionMask.SINK);
			c.set_subscribe_callback (context_events_cb);
			get_properties ();
			ready ();
		}
	}

	/* Mute operations */
	public void set_mute (bool mute)
	{
		if (context.get_state () != Context.State.READY)
		{
			warning ("Could not mute: PulseAudio server connection is not ready.");
			return;
		}

		context.get_sink_info_list ((context, sink, eol) => {
			if (sink != null)
				context.set_sink_mute_by_index (sink.index, mute, null);
		});
	}

	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);
	}

	public void set_volume (double volume)
	{
		if (context.get_state () != Context.State.READY)
		{
			warning ("Could not change volume: PulseAudio server connection is not ready.");
			return;
		}
		_volume = volume;

		context.get_server_info (server_info_cb_for_set_volume);
	}

	public double get_volume ()
	{
		return _volume;
	}
}