/// <summary>
/// Initializes a new instance of the <see cref="AudioDevice"/> class.
/// </summary>
/// <param name="id">The identifier.</param>
/// <param name="friendlyName">The friendly name.</param>
/// <param name="flow">The flow of the auudio.</param>
/// <param name="enabled">Whether the audio device is enabled.</param>
/// <param name="assignedDefault">The enumeration that represents whether this device is a default audio device.</param>
internal AudioDevice(string id, string friendlyName, AudioFlowType flow, bool enabled = true, DefaultAudioDeviceType assignedDefault = DefaultAudioDeviceType.None)
{
this.AssignedDefault = assignedDefault;
this.Enabled = enabled;
this.Flow = flow;
this.FriendlyName = friendlyName;
this.Id = id;
}
/// <summary>
/// Gets the default audio device for the specified process.
/// </summary>
/// <param name="processId">The process identifier.</param>
/// <param name="flow">The audio flow; either input or output.</param>
/// <returns>The audio device; otherwise <c>null</c>.</returns>
public string GetDefaultAudioDevice(uint processId, AudioFlowType flow)
{
try
{
var dataFlow = this.GetDataFlow(flow);
this.AudioPolicyConfig.GetPersistedDefaultAudioEndpoint(processId, dataFlow, Role.Multimedia | Role.Console, out string deviceId);
return(this.ParseDeviceId(deviceId));
}
catch
{
return(null);
}
}
/// <summary>
/// Sets the default audio device for the specified process.
/// </summary>
/// <param name="processName">The process name.</param>
/// <param name="audioFlow">The audio flow; either input or output.</param>
/// <param name="deviceId">The device identifier.</param>
public void SetDefaultAudioDevice(string processName, AudioFlowType audioFlow, string deviceId)
{
var flow = this.GetDataFlow(audioFlow);
if (this.TryGetAudioSessionProcessId(processName, flow, out var audioSessionProcessId))
{
// Default to zero pointer; this will only change if an audio device has been specified.
var hstring = IntPtr.Zero;
if (!AudioDevices.Current.IsDefaultPlaybackDevice(deviceId))
{
using (var device = AudioDevices.Current.GetDevice(deviceId))
{
var persistDeviceId = this.GenerateDeviceId(device.ID);
Combase.WindowsCreateString(persistDeviceId, (uint)persistDeviceId.Length, out hstring);
}
}
// Set the audio device for the process.
this.AudioPolicyConfig.SetPersistedDefaultAudioEndpoint(audioSessionProcessId, flow, Role.Multimedia, hstring);
this.AudioPolicyConfig.SetPersistedDefaultAudioEndpoint(audioSessionProcessId, flow, Role.Console, hstring);
}
}
/// <summary>
/// Sets the default audio device for the specified process.
/// </summary>
/// <param name="processId">The process identifier.</param>
/// <param name="flow">The audio flow; either input or output.</param>
/// <param name="deviceId">The device identifier.</param>
public void SetDefaultAudioDevice(uint processId, AudioFlowType flow, string deviceId)
{
var processName = Process.GetProcessById((int)processId).ProcessName;
this.SetDefaultAudioDevice(processName, flow, deviceId);
}
/// <summary> /// Gets the data flow from the specified <see cref="AudioFlowType"/>. /// </summary> /// <param name="flow">The flow.</param> /// <returns>The interop data flow.</returns> private DataFlow GetDataFlow(AudioFlowType flow) => flow == AudioFlowType.Playback ? DataFlow.Render : DataFlow.Capture;
