/// <summary>
/// Prevents a default instance of the <see cref="DAC"/> class from being created.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="name">The name. Can be empty or null.</param>
/// <param name="device">The device number of this <see cref="DAC"/>.</param>
DAC(ControllerType type, string name, uint device)
{
if (instance != null)
{
throw new InvalidOperationException("DAC not initialized. Call DAC.TryInitialize(...) first.");
}
this.type = type;
this.name = name;
this.device = device;
this.shutter = new ReferenceCounter(OnCloseShutter, OnOpenShutter);
instance = this;
}
/// <summary>
/// Tries to initialize the <see cref="DAC.Instance"/> using the specified <see cref="ControllerType"/> mask.
/// </summary>
/// <param name="types">The types of controllers that should be used during initialization.</param>
/// <param name="type">The type of controllers to use.</param>
/// <param name="deviceChooser">The device chooser. Once the overall number of devices has been retrieved, this
/// callback is asked which device should actually be used. Can be null. If null, the first device that has been
/// found will be used.</param>
/// <exception cref="T:System.InvalidOperationException">If <see cref="DAC.Instance"/> has been initialized.</exception>
///
/// <exception cref="T:System.ArgumentException">If any error occurred while initializing the device.</exception>
public static DAC Initialize(ControllerTypes types, ControllerType type, DeviceChooser deviceChooser = null)
{
if (instance != null)
{
throw new InvalidOperationException(string.Format("DAC already initialized with '{0}'. Shutdown/Dispose DAC before retrieving new information.", instance.ControllerType));
}
try
{
uint deviceCount = 0;
if (NativeMethods.LDL_Init((uint)ConvertToNativeMask(types), ref deviceCount) != NativeConstants.DAC_OK)
{
throw new ArgumentException(string.Format("Could not intialize DAC with '{0}'", type));
}
uint device = deviceChooser == null ? 0 : deviceChooser(deviceCount);
uint tType = 0;
uint tEnum = 0;
var sName = new StringBuilder(128);
if (NativeMethods.LDL_GetDACInfo(device, sName, (uint)sName.Length, ref tType, ref tEnum) != NativeConstants.DAC_OK)
{
throw new ArgumentException(string.Format("Could retriev name of DAC device number {0} with '{1}'.", device, type));
}
if (NativeMethods.LDL_DAC_Init(device) != NativeConstants.DAC_OK)
{
throw new ArgumentException(string.Format("Could not intialize DAC with '{0}' using device number {1}", type, device));
}
instance = new DAC(type, sName.ToString(), device);
return(instance);
}
catch (Exception ex)
{
NativeMethods.LDL_Close();
throw new ArgumentException(string.Format("Could not initialize DAC.Instance with '{0}'.", type), ex);
}
}
void Dispose(bool disposing)
{
try
{
if (!disposing || disposed)
{
return;
}
NativeMethods.LDL_DAC_Stop(device);
NativeMethods.LDL_Close();
}
finally
{
if (instance == this)
{
instance = null;
}
disposed = true;
}
}
