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Diffstat (limited to 'src/volume-warning-pulse.vala')
| -rw-r--r-- | src/volume-warning-pulse.vala | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/volume-warning-pulse.vala b/src/volume-warning-pulse.vala new file mode 100644 index 0000000..2492cef --- /dev/null +++ b/src/volume-warning-pulse.vala @@ -0,0 +1,211 @@ +/* + * -*- 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 _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 _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.debug ("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())); + } +} |