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/*
* -*- 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;
/**
* A VolumeWarning that uses PulseAudio to
* (a) implement sound_system_set_multimedia_volume() and
* (b) keep the multimedia_active and multimedia_volume properties up-to-date
*/
public class VolumeWarningPulse : VolumeWarning
{
public VolumeWarningPulse (IndicatorSound.Options options,
PulseAudio.GLibMainLoop pgloop) {
base (options);
_pgloop = pgloop;
pulse_reconnect ();
}
~VolumeWarningPulse () {
clear_timer (ref _pulse_reconnect_timer);
clear_timer (ref _update_sink_timer);
clear_timer (ref _pending_sink_inputs_timer);
pulse_disconnect ();
}
protected override void preshow () {
/* showing the dialog can change the sink input index (bug #1484589)
* so cache it here for later use in sound_system_set_multimedia_volume() */
_target_sink_input_index = _multimedia_sink_input_index;
}
protected override void sound_system_set_multimedia_volume (PulseAudio.Volume volume) {
var index = _target_sink_input_index;
return_if_fail (_pulse_context != null);
return_if_fail (index != PulseAudio.INVALID_INDEX);
return_if_fail (volume != PulseAudio.Volume.INVALID);
unowned CVolume cvol = CVolume ();
cvol.set (1, volume);
debug ("setting multimedia (sink_input index %d) volume to %s", (int)index, cvol.to_string ());
_pulse_context.set_sink_input_volume (index, cvol);
}
private unowned PulseAudio.GLibMainLoop _pgloop = null;
private PulseAudio.Context _pulse_context = null;
private uint _pulse_reconnect_timer = 0;
private uint _update_sink_timer = 0;
private uint _pending_sink_inputs_timer = 0;
private GenericSet<uint32> _pending_sink_inputs = new GenericSet<uint32>(direct_hash, direct_equal);
private uint soon_interval_msec = 500;
private uint32 _target_sink_input_index = PulseAudio.INVALID_INDEX;
private uint32 _multimedia_sink_input_index = PulseAudio.INVALID_INDEX;
/***/
private bool is_active_multimedia (SinkInputInfo i) {
return (i.corked == 0) &&
(i.proplist.gets(PulseAudio.Proplist.PROP_MEDIA_ROLE) == "multimedia");
}
private void clear_multimedia () {
_multimedia_sink_input_index = PulseAudio.INVALID_INDEX;
multimedia_volume = PulseAudio.Volume.INVALID;
multimedia_active = false;
}
private void on_sink_input_info (Context c, SinkInputInfo? i, int eol) {
if (i == null)
return;
if (is_active_multimedia (i)) {
GLib.message ("on_sink_input_info() setting multimedia sink input index to %d, sink index to %d", (int)i.index, (int)i.sink);
_multimedia_sink_input_index = i.index;
multimedia_volume = i.volume.max ();
multimedia_active = true;
}
else if (i.index == _multimedia_sink_input_index) {
clear_multimedia ();
}
}
private void update_all_sink_inputs () {
_pulse_context.get_sink_input_info_list (on_sink_input_info);
}
private void update_sink_input (uint32 index) {
_pulse_context.get_sink_input_info (index, on_sink_input_info);
}
private void update_sink_input_soon (uint32 index) {
_pending_sink_inputs.add (index);
if (_pending_sink_inputs_timer == 0) {
_pending_sink_inputs_timer = Timeout.add (soon_interval_msec, () => {
_pending_sink_inputs_timer = 0;
_pending_sink_inputs.foreach ((i) => update_sink_input (i));
_pending_sink_inputs.remove_all ();
return Source.REMOVE;
});
}
}
private void context_events_cb (Context c, Context.SubscriptionEventType t, uint32 index) {
switch (t & Context.SubscriptionEventType.FACILITY_MASK)
{
case Context.SubscriptionEventType.SINK_INPUT:
switch (t & Context.SubscriptionEventType.TYPE_MASK)
{
// if a SinkInput changed, get its updated info
// to keep our multimedia indices up-to-date
case Context.SubscriptionEventType.NEW:
case Context.SubscriptionEventType.CHANGE:
update_sink_input_soon (index);
break;
// if the multimedia sink input was removed,
// reset our mm fields and look for a new mm sink input
case Context.SubscriptionEventType.REMOVE:
if (index == _multimedia_sink_input_index) {
clear_multimedia ();
update_all_sink_inputs ();
}
break;
default:
GLib.debug ("Sink input event not known.");
break;
}
break;
default:
break;
}
}
private void pulse_context_state_callback (Context c) {
switch (c.get_state ()) {
case Context.State.READY:
c.set_subscribe_callback (context_events_cb);
c.subscribe (PulseAudio.Context.SubscriptionMask.SINK |
PulseAudio.Context.SubscriptionMask.SINK_INPUT);
update_all_sink_inputs ();
break;
case Context.State.FAILED:
case Context.State.TERMINATED:
pulse_reconnect_soon ();
break;
default:
break;
}
}
private void pulse_disconnect () {
if (_pulse_context != null) {
_pulse_context.disconnect ();
_pulse_context = null;
}
}
private void pulse_reconnect_soon () {
if (_pulse_reconnect_timer == 0) {
_pulse_reconnect_timer = Timeout.add_seconds (2, () => {
_pulse_reconnect_timer = 0;
pulse_reconnect ();
return Source.REMOVE;
});
}
}
void pulse_reconnect () {
pulse_disconnect ();
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");
_pulse_context = new PulseAudio.Context (_pgloop.get_api(), null, props);
_pulse_context.set_state_callback (pulse_context_state_callback);
unowned string server_string = Environment.get_variable ("PULSE_SERVER");
if (_pulse_context.connect (server_string, Context.Flags.NOFAIL, null) < 0)
GLib.warning ("pa_context_connect() failed: %s\n", PulseAudio.strerror(_pulse_context.errno()));
}
}
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