private static bool DeviceIsValid(IMultimediaDevice device)
{
try
{
string id;
EDeviceState state;
device.GetId(out id);
device.GetState(out state);
return(true);
}
catch
{
return(false);
}
}
private CoreAudioDevice CacheDevice(IMultimediaDevice mDevice)
{
if (!DeviceIsValid(mDevice))
{
return(null);
}
string id;
mDevice.GetId(out id);
var device = GetDevice(id);
if (device != null)
{
return(device);
}
device = new CoreAudioDevice(mDevice, this);
device.StateChanged.Subscribe(OnAudioDeviceChanged);
device.DefaultChanged.Subscribe(OnAudioDeviceChanged);
device.PropertyChanged.Subscribe(OnAudioDeviceChanged);
var lockAcquired = _lock.AcquireWriteLockNonReEntrant();
try
{
_deviceCache.Add(device);
return(device);
}
finally
{
if (lockAcquired)
{
_lock.ExitWriteLock();
}
}
}