public VolumeHelper(WaveInEvent waveIn)
{
if (waveIn == null)
throw new ArgumentNullException();
_waveIn = new WeakReference(waveIn);
volumeControl = null;
altVolumeControl = null;
TryGetVolumeControl();
}
private void TryGetVolumeControl()
{
if (Wave == null)
return;
try
{
int waveInDeviceNumber = Wave.DeviceNumber;
if (Environment.OSVersion.Version.Major >= 6) // Vista and over
{
var mixerLine = Wave.GetMixerLine();
foreach (var control in mixerLine.Controls)
{
Common.DebugHelper.WriteLine("{0} Mixer Line Control {1} [{2}]", mixerLine.Name, control.Name, control.ControlType);
}
foreach (var control in mixerLine.Controls)
{
if (control.ControlType == MixerControlType.Volume)
{
if (control.IsUnsigned)
{
try
{
this.volumeControl = control as UnsignedMixerControl;
break;
}
catch { this.volumeControl = null; }
}
else if (control.IsSigned)
{
try
{
this.altVolumeControl = control as SignedMixerControl;
}
catch { this.altVolumeControl = null; }
}
}
}
}
else
{
var mixer = new Mixer(waveInDeviceNumber);
foreach (var destination in mixer.Destinations.Where(d => d.ComponentType == MixerLineComponentType.DestinationWaveIn))
{
foreach (var source in destination.Sources
.Where(source => source.ComponentType == MixerLineComponentType.SourceMicrophone))
{
foreach (var control in source.Controls
.Where(control => control.ControlType == MixerControlType.Volume))
{
if (control.IsUnsigned)
{
try
{
volumeControl = control as UnsignedMixerControl;
break;
}
catch
{
volumeControl = null;
}
}
else if (control.IsSigned)
{
try
{
this.altVolumeControl = control as SignedMixerControl;
}
catch { this.altVolumeControl = null; }
}
}
}
}
}
}
catch
{
volumeControl = null;
altVolumeControl = null;
}
}
