static private void Play()
{
if (_playList.Count > 0)
{
// Try to get the first item under a lock.
int index = -1;
PlayAlarmItem item = null;
lock (_lock)
{
if (_playList.Count > 0)
{
index = _playList.Count - 1;
item = (PlayAlarmItem)_playList[index];
_playList.Remove(item);
}
}
if (null != item)
{
_mediaPlayer.Source = MediaSource.CreateFromStorageFile(item.AlarmFile);
_mediaPlayer.Play();
// If the item needs to be played continuously, then add it back to the list.
if (item.IsContinuousAlarm)
{
_playList.Add(item);
}
}
}
}
/// <summary>
/// Cancel the alarm by the id provided.
/// </summary>
/// <param name="alarmId"></param>
static public void CancelAlarm(Int64 alarmId)
{
lock (_lock)
{
PlayAlarmItem item = _playList.Find((entry) => entry.AlarmId == alarmId);
if (null != item)
{
_playList.Remove(item);
}
}
}
static public void PlayAnnouncement(IStorageFile myAnnouncement, bool isContinuousAlarm, Int64 announcementId)
{
PlayAlarmItem item = new PlayAlarmItem(myAnnouncement, isContinuousAlarm, announcementId);
lock (_lock)
{
_playList.Add(item);
}
// Start a background timer job to signal the alarm.
// Start this timer job 3 seconds later, so that the system as a few seconds to start up.
_timerRecurringAlarm.Change(3000, 3000);
}
