internal Device(UvcDevice device)
{
handle = device;
IntPtr descriptor;
var error = NativeMethods.uvc_get_device_descriptor(handle, out descriptor);
UvcException.ThrowExceptionForUvcError(error);
try
{
vendorId = (ushort)Marshal.ReadInt16(descriptor);
productId = (ushort)Marshal.ReadInt16(descriptor, 2);
complianceLevel = (ushort)Marshal.ReadInt16(descriptor, 4);
}
finally { NativeMethods.uvc_free_device_descriptor(descriptor); }
}
internal Device(UvcDevice device)
{
handle = device;
IntPtr descriptor;
var error = NativeMethods.uvc_get_device_descriptor(handle, out descriptor);
UvcException.ThrowExceptionForUvcError(error);
try
{
vendorId = (ushort)Marshal.ReadInt16(descriptor);
productId = (ushort)Marshal.ReadInt16(descriptor, 2);
complianceLevel = (ushort)Marshal.ReadInt16(descriptor, 4);
serialNumber = Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(descriptor, 6));
manufacturer = Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(descriptor, 6 + IntPtr.Size));
product = Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(descriptor, 6 + IntPtr.Size * 2));
}
finally { NativeMethods.uvc_free_device_descriptor(descriptor); }
}
public IEnumerable <Device> GetDevices()
{
IntPtr devices;
var error = NativeMethods.uvc_get_device_list(handle, out devices);
UvcException.ThrowExceptionForUvcError(error);
try
{
int i = 0;
IntPtr devh;
while ((devh = Marshal.ReadIntPtr(devices, IntPtr.Size * i++)) != IntPtr.Zero)
{
var device = new UvcDevice(devh);
yield return(new Device(device));
}
}
finally { NativeMethods.uvc_free_device_list(devices, 1); }
}
public IEnumerable <Device> FindDevices(int vendorId = 0, int productId = 0, string serialNumber = null)
{
IntPtr devices;
var error = NativeMethods.uvc_find_devices(handle, out devices, vendorId, productId, serialNumber);
UvcException.ThrowExceptionForUvcError(error);
try
{
int i = 0;
IntPtr devh;
while ((devh = Marshal.ReadIntPtr(devices, IntPtr.Size * i++)) != IntPtr.Zero)
{
var device = new UvcDevice(devh);
yield return(new Device(device));
}
}
finally { NativeMethods.uvc_free_device_list(devices, 1); }
}
internal static extern void uvc_ref_device(UvcDevice dev);
internal static extern UvcError uvc_open(UvcDevice dev, out UvcDeviceHandle devh);
internal static extern UvcError uvc_find_device(
UvcContext ctx,
out UvcDevice dev,
int vid,
int pid,
string sn);
internal static extern UvcError uvc_get_device_descriptor(UvcDevice dev, out IntPtr desc);