Program.vb

#Region "Copyright"

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#End Region

Imports DotNetBrowser.Browser
Imports DotNetBrowser.Engine
Imports DotNetBrowser.Handlers
Imports DotNetBrowser.Media
Imports DotNetBrowser.Media.Handlers

''' <summary>
'''     The sample demonstrates how to get list of available audio and video capture devices,
'''     register own SelectMediaDeviceHandler to provide Chromium with default audio/video capture
'''     device to be used on a web page for working with webcam and accessing microphone.
''' </summary>
Public Class WindowMain
    Inherits Window

    Public Shared Sub Main()
        Using engine As IEngine = EngineFactory.Create()
            Using browser As IBrowser = engine.CreateBrowser()

                Dim mediaDevices As IMediaDevices = engine.MediaDevices
                Console.WriteLine(vbLf & "Available audio capture devices:")
                PrintDevices(mediaDevices.AudioCaptureDevices)
                Console.WriteLine(vbLf & "Available video capture devices:")
                PrintDevices(mediaDevices.VideoCaptureDevices)

                mediaDevices.SelectMediaDeviceHandler =
                    New Handler(Of SelectMediaDeviceParameters, SelectMediaDeviceResponse)(
                        AddressOf SelectDevice)

                browser.Navigation.LoadUrl("https://alexandre.alapetite.fr/doc-alex/html5-webcam/index.en.html") _
                    .Wait()

            End Using
        End Using

        Console.WriteLine("Press any key to terminate...")
        Console.ReadKey()
    End Sub

    Private Shared Sub PrintDevices(devices As IEnumerable(Of MediaDevice))
        For Each device As MediaDevice In devices
            Console.WriteLine($"- {device.Name}")
        Next device
    End Sub

    Private Shared Function SelectDevice(arg As SelectMediaDeviceParameters) As SelectMediaDeviceResponse
        Console.WriteLine(vbLf & "Requested device type: " & arg.Type.ToString())
        ' Set first available device as default.
        Dim availableDevices As IEnumerable(Of MediaDevice) = arg.Devices
        Dim defaultDevice As MediaDevice = availableDevices.FirstOrDefault()
        If defaultDevice IsNot Nothing Then
            Console.WriteLine($"Default device is set to {defaultDevice.Name}")
        End If
        Return SelectMediaDeviceResponse.Select(defaultDevice)
    End Function

End Class