Huddly.YaUVC 1.0.7

Overview

yauvc (Yet Another UVC) is a cross-platform library for USB video devices. It enables fine-grained control over USB video devices exporting the standard USB Video Class (UVC) interface, enabling developers to access UVC devices in a generic fashion. It was primarily developed for use by Huddly SDK for .NET.
C# wrapper are generated by SWIG (as part of the cmake build process).

Feature highlights

• Cross-platform: Windows, macOS, Linux
• Controls zoom, pan, tilt, gain, brightness etc.
• Supports extension unit controls (XU controls)
• Monitor device connection and disconnection
• C# wrapper for .NET developers

Getting started

Here is a simple example of how to use yauvc to control a UVC device:

using Huddly.UVC.PInvoke;

namespace dotnet_sample;

class Program
{
#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
    static async Task Main(string[] args)
    {
        // Vendor ID of the device is 0x2bd9
        var uvcDevice = new HuddlyUVCDevice(0x2bd9);
        uvcDevice.DeviceConnected += (sender, device) =>
        {
            var uvc = (HuddlyUVCDevice)sender;
            ShowDeviceInformation(uvc, device);
        };
        uvcDevice.DeviceDisconnected += (sender, device) =>
        {
            Console.WriteLine($"Device disconnected: {device.serialNumber}");
            Console.WriteLine();
        };

        try
        {
            // Start monitoring for device connection/disconnection using HuddlyUVCDevice
            // await uvcDevice.StartMonitoring();
            // await Task.Delay(200);

            // Find device by Pid and Serial number
            var device = uvcDevice.findDevice(0x21, "B44K00521");
            if (device is not null)
            {
                ShowDeviceInformation(uvcDevice, device);

                // Attention! Call this when the Device disconnected or disposed
                // it will remove the device from the internal cache
                uvcDevice.onDeviceDisconnected(device.pathName);
            }

            Console.WriteLine("Press any key to exit...");
            Console.WriteLine();
            Console.ReadKey();

            // Stop monitoring for device connection/disconnection (optional)
            // and cleanup the resources
            uvcDevice.StopMonitoring();
            uvcDevice.Dispose();
        }
        catch (Exception e)
        {
            Console.WriteLine($"Error: {e}");
        }

        Console.WriteLine("Exiting...");
    }

    static void ShowDeviceInformation(HuddlyUVCDevice uvc, DeviceParams device)
    {
        if (uvc.IsDisposed)
            return;
        
        Console.WriteLine(
            $"Device connected: {device.deviceName} VID=0x{device.vendorId:x4}, PID=0x{device.productId:x4}, Serial={device.serialNumber}"
        );
        Console.WriteLine($"Device Id: {device.pathName}");
        if (uvc.getPanTilt(device.pathName, out int pan, out int tilt))
            Console.WriteLine($"Pan: {pan}, Tilt: {tilt}");

        var settings = uvc.getSupportedSettings(device.pathName);
        Console.Write($"Supported setting:");
        foreach (var setting in settings)
        {
            Console.Write($" {setting}");
        }
        Console.WriteLine();

        var panRes = uvc.getSetting(device.pathName, "pan");
        if (panRes is not null)
            Console.WriteLine($"  pan: {panRes.cur} [{panRes.min}, {panRes.max}]");
        var tiltRes = uvc.getSetting(device.pathName, "tilt");
        if (tiltRes is not null)
            Console.WriteLine($"  tilt: {tiltRes.cur} [{tiltRes.min}, {tiltRes.max}]");
        var zoomRes = uvc.getSetting(device.pathName, "zoom");
        if (zoomRes is not null)
            Console.WriteLine($"  zoom: {zoomRes.cur} [{zoomRes.min}, {zoomRes.max}]");
        var brRes = uvc.getSetting(device.pathName, "brightness");
        if (brRes is not null)
            Console.WriteLine($"  brightness: {brRes.cur} [{brRes.min}, {brRes.max}]");
        Console.WriteLine();
    }
}