/// <summary>
/// Unregisters a previously registered callback for the device volume change event.
/// </summary>
/// <returns>
/// MLResult.Result will be <c>MLResult.Code.Ok</c> if successful.
/// MLResult.Result will be <c>MLResult.Code.UnspecifiedFailure</c> if failed due to internal error.
/// MLResult.Result will be <c>MLResult.Code.InvalidParam</c> if a parameter is invalid.
/// MLResult.Result will be <c>MLResult.Code.PrivilegeDenied</c> if <c>AudioCaptureMic</c> privilege is denied.
/// MLResult.Result will be <c>MLResult.Code.AudioNotImplemented</c> if the function is not implemented.
/// </returns>
private MLResult.Code UnregisterOnVolumeChangeCallback()
{
MLResult.Code result;
try
{
// Unregister the native callback for the volume change event.
result = NativeBindings.MLAudioSetMasterVolumeCallback(null, IntPtr.Zero);
if (result != MLResult.Code.Ok)
{
MLPluginLog.ErrorFormat("MLAudio.UnregisterOnVolumeChangeCallback failed to register callback. Reason: {0}", result);
}
}
catch (System.DllNotFoundException)
{
MLPluginLog.Error(this.DllNotFoundError);
throw;
}
return(result);
}
/// <summary>
/// Registers a callback for the device volume change event.
/// </summary>
/// <returns>
/// MLResult.Result will be <c>MLResult.Code.Ok</c> if successful.
/// MLResult.Result will be <c>MLResult.Code.UnspecifiedFailure</c> if failed due to internal error.
/// MLResult.Result will be <c>MLResult.Code.InvalidParam</c> if a parameter is invalid.
/// MLResult.Result will be <c>MLResult.Code.PrivilegeDenied</c> if <c>AudioCaptureMic</c> privilege is denied.
/// MLResult.Result will be <c>MLResult.Code.AudioNotImplemented</c> if the function is not implemented.
/// </returns>
private MLResult.Code RegisterOnVolumeChangeCallback()
{
MLResult.Code result;
try
{
// Attempt to register the native callback for the volume change event.
result = NativeBindings.MLAudioSetMasterVolumeCallback(HandleOnMLAudioSetMasterVolumeCallback, IntPtr.Zero);
if (result != MLResult.Code.Ok)
{
MLPluginLog.ErrorFormat("MLAudio.RegisterOnVolumeChangeCallback failed to register callback. Reason: {0}", result);
}
}
catch (System.DllNotFoundException)
{
// Exception is caught in the Singleton BaseStart().
throw;
}
return(result);
}
