public void GetInterfaceInfo(int interfaceIndex, out USB_INTERFACE_DESCRIPTOR descriptor, out WINUSB_PIPE_INFORMATION[] pipes)
{
var pipeList = new List <WINUSB_PIPE_INFORMATION>();
bool success = WinUsb_QueryInterfaceSettings(InterfaceHandle(interfaceIndex), 0, out descriptor);
if (!success)
{
throw APIException.Win32("Failed to get WinUSB device interface descriptor.");
}
IntPtr interfaceHandle = InterfaceHandle(interfaceIndex);
for (byte pipeIdx = 0; pipeIdx < descriptor.bNumEndpoints; pipeIdx++)
{
WINUSB_PIPE_INFORMATION pipeInfo;
success = WinUsb_QueryPipe(interfaceHandle, 0, pipeIdx, out pipeInfo);
pipeList.Add(pipeInfo);
if (!success)
{
throw APIException.Win32("Failed to get WinUSB device pipe information.");
}
}
pipes = pipeList.ToArray();
}
internal USBInterface(USBDevice device, int interfaceIndex, API.USB_INTERFACE_DESCRIPTOR rawDesc, USBPipeCollection pipes)
{
// Set raw class identifiers
ClassValue = rawDesc.bInterfaceClass;
SubClass = rawDesc.bInterfaceSubClass;
Protocol = rawDesc.bInterfaceProtocol;
Number = rawDesc.bInterfaceNumber;
InterfaceIndex = interfaceIndex;
// If interface class is of a known type (USBBaseClass enum), use this
// for the InterfaceClass property.
BaseClass = USBBaseClass.Unknown;
if (Enum.IsDefined(typeof(USBBaseClass), (int)rawDesc.bInterfaceClass))
{
BaseClass = (USBBaseClass)(int)rawDesc.bInterfaceClass;
}
Device = device;
Pipes = pipes;
// Handle pipes
foreach (USBPipe pipe in pipes)
{
// Attach pipe to this interface
pipe.AttachInterface(this);
// If first in or out pipe, set InPipe and OutPipe
if (pipe.IsIn && InPipe == null)
{
InPipe = pipe;
}
if (pipe.IsOut && OutPipe == null)
{
OutPipe = pipe;
}
}
}
private static extern bool WinUsb_QueryInterfaceSettings(IntPtr InterfaceHandle, Byte AlternateInterfaceNumber, out USB_INTERFACE_DESCRIPTOR UsbAltInterfaceDescriptor);