internal AudioPolicyConfigFactoryImplForDownlevel()
{
var iid = typeof(IAudioPolicyConfigFactoryDownlevel).GUID;
Combase.RoGetActivationFactory("Windows.Media.Internal.AudioPolicyConfig", ref iid, out object factory);
_factory = (IAudioPolicyConfigFactoryDownlevel)factory;
}
public static IAudioPolicyConfigFactory Create()
{
var iid = typeof(IAudioPolicyConfigFactory).GUID;
Combase.RoGetActivationFactory("Windows.Media.Internal.AudioPolicyConfig", ref iid, out object factory);
return((IAudioPolicyConfigFactory)factory);
}
/// <summary>
/// Initializes a new instance of the <see cref="AudioPolicyConfigFactory21H2"/> class.
/// </summary>
public AudioPolicyConfigFactory21H2()
{
var iid = typeof(IAudioPolicyConfigFactory21H2).GUID;
Combase.RoGetActivationFactory("Windows.Media.Internal.AudioPolicyConfig", ref iid, out object factory);
this.Factory = (IAudioPolicyConfigFactory21H2)factory;
}
private static void EnsurePolicyConfig()
{
if (s_sharedPolicyConfig == null)
{
Guid iid = typeof(IAudioPolicyConfigFactory).GUID;
Combase.RoGetActivationFactory("Windows.Media.Internal.AudioPolicyConfig", ref iid, out object factory);
s_sharedPolicyConfig = (IAudioPolicyConfigFactory)factory;
}
}
/// <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);
}
}
public static void SetDefaultEndPoint(string deviceId, int processId)
{
Trace.WriteLine($"AudioPolicyConfigService SetDefaultEndPoint {deviceId} {processId}");
try
{
EnsurePolicyConfig();
IntPtr hstring = IntPtr.Zero;
if (!string.IsNullOrWhiteSpace(deviceId))
{
var str = GenerateDeviceId(deviceId);
Combase.WindowsCreateString(str, (uint)str.Length, out hstring);
}
s_sharedPolicyConfig.SetPersistedDefaultAudioEndpoint((uint)processId, EDataFlow.eRender, ERole.eMultimedia, hstring);
s_sharedPolicyConfig.SetPersistedDefaultAudioEndpoint((uint)processId, EDataFlow.eRender, ERole.eConsole, hstring);
}
catch (Exception ex)
{
AppTrace.LogWarning(ex);
}
}
/// <inheritdoc/>
public void SetDefaultAudioDevice(IProcessSelectionCriteria criteria, string deviceKey)
{
var dataFlow = this.GetDataFlow(deviceKey);
var predicate = criteria.ToPredicate();
foreach (var audioSession in this.GetAudioSessions().Where(predicate.IsMatch))
{
// Default to zero pointer; this will only change if an audio device has been specified.
var hstring = IntPtr.Zero;
var device = AudioDevices.Current.GetDeviceByKey(deviceKey);
if (!device.IsDynamic)
{
var persistDeviceId = this.GenerateDeviceId(device.Id, dataFlow);
Combase.WindowsCreateString(persistDeviceId, (uint)persistDeviceId.Length, out hstring);
}
// Set the audio device for the process.
var audioSessionProcessId = audioSession.GetProcessID;
this.AudioPolicyConfig.SetPersistedDefaultAudioEndpoint(audioSessionProcessId, dataFlow, Role.Console, hstring);
this.AudioPolicyConfig.SetPersistedDefaultAudioEndpoint(audioSessionProcessId, dataFlow, Role.Multimedia, hstring);
this.AudioPolicyConfig.SetPersistedDefaultAudioEndpoint(audioSessionProcessId, dataFlow, Role.Communications, hstring);
}
}
public void SetDefaultEndPoint(string deviceId, int processId)
{
Console.WriteLine($"AudioPolicyConfigService SetDefaultEndPoint {deviceId} {processId}");
try
{
EnsurePolicyConfig();
var hstring = IntPtr.Zero;
if (!string.IsNullOrWhiteSpace(deviceId))
{
var str = GenerateDeviceId(deviceId);
Combase.WindowsCreateString(str, (uint)str.Length, out hstring);
}
_sharedPolicyConfig.SetPersistedDefaultAudioEndpoint((uint)processId, _flow, Role.Multimedia,
hstring);
_sharedPolicyConfig.SetPersistedDefaultAudioEndpoint((uint)processId, _flow, Role.Console, hstring);
}
catch (Exception ex)
{
Console.WriteLine($"{ex}");
}
}
