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/*
* 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 volume_changed (double v);
/** true when connected to the pulse server */
public bool ready { get; set; }
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 (context_state_callback);
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 context_state_callback (Context c)
{
if (c.get_state () == Context.State.READY)
{
c.subscribe (PulseAudio.Context.SubscriptionMask.SINK);
c.set_subscribe_callback (context_events_cb);
get_properties ();
this.ready = true;
}
else
this.ready = false;
}
/* Mute operations */
public void set_mute (bool mute)
{
return_if_fail (context.get_state () == Context.State.READY);
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)
{
return_if_fail (context.get_state () == Context.State.READY);
_volume = volume;
context.get_server_info (server_info_cb_for_set_volume);
}
public double get_volume ()
{
return _volume;
}
}
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