/// <summary>
/// Parse and activate a device.
/// If successful it is added to the devices list.
/// </summary>
/// <param name="device">The device to parse.</param>
/// <param name="id">The unique id of the device.</param>
private WasApiAudioDevice ParseDevice(IMMDevice device, string id)
{
if (device == null)
{
return(null);
}
string deviceName = $"Unknown Device ({id})";
// Try to get the device name.
device.OpenPropertyStore(StorageAccessMode.Read, out IPropertyStore store);
if (store != null)
{
store.GetValue(ref PropertyKey.PKEY_Device_FriendlyName, out PropVariant deviceNameProp);
object parsed = deviceNameProp.Value;
if (parsed is string deviceNameStr)
{
deviceName = deviceNameStr;
}
}
// Add to the list.
var dev = new WasApiAudioDevice(id, deviceName, device);
_devices.Add(id, dev);
Engine.Log.Trace($"Detected audio device - {deviceName}", MessageSource.Win32);
return(dev);
}
/// <summary>
/// Set the audio device the layer will output into.
/// </summary>
public void SetDevice(WasApiAudioDevice device)
{
if (device == null)
{
_layerContext = null;
return;
}
_layerContext = device.CreateLayerContext(out uint bufferSize);
_bufferLengthInFrames = (int)bufferSize;
}
/// <summary>
/// Sets the specified id to be the default device.
/// </summary>
/// <param name="id">The id of the device to set as default.</param>
private void SetDefaultDevice(string id)
{
_devices.TryGetValue(id, out WasApiAudioDevice defaultDevice);
if (defaultDevice == null)
{
// Default audio device was not found in the device list - query for it.
defaultDevice = ParseDevice(id);
if (defaultDevice == null)
{
Win32Platform.CheckError("Default audio device is not in device list.", true);
}
}
// Unset old default.
foreach (KeyValuePair <string, WasApiAudioDevice> device in _devices)
{
device.Value.Default = false;
}
if (defaultDevice == null)
{
return;
}
defaultDevice.Default = true;
DefaultDevice = defaultDevice;
Engine.Log.Trace($"Default audio device is: {defaultDevice.Name}.", MessageSource.Win32);
// Tell all layers about this change.
lock (_layers)
{
foreach (WasApiLayer layer in _layers)
{
layer.DefaultDeviceChanged(defaultDevice);
}
}
}
public WasApiLayerContext(WasApiAudioDevice parent)
{
Parent = parent;
}
public void DefaultDeviceChanged(WasApiAudioDevice newDevice)
{
_updateDevice = true;
}
private void SetDevice(WasApiAudioDevice device)
{
_layerContext = device.CreateLayerContext();
}
