''' <summary>
''' Class that implements image capturing from camera and previewing of captured images in image viewer.
''' </summary>
Public Class VideoPreview
    ''' <summary>
    ''' Image viewer where captured images must be shown.
    ''' </summary>
    Private _viewer As Vintasoft.Imaging.UI.ImageViewer

    ''' <summary>
    ''' Image capture source.
    ''' </summary>
    Private _captureSource As Vintasoft.Imaging.Media.ImageCaptureSource


    Public Sub New(viewer As Vintasoft.Imaging.UI.ImageViewer, captureDevice As Vintasoft.Imaging.Media.ImageCaptureDevice)
        _viewer = viewer

        _captureSource = New Vintasoft.Imaging.Media.ImageCaptureSource()
        _captureSource.CaptureDevice = captureDevice
        AddHandler _captureSource.CaptureCompleted, New System.EventHandler(Of Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs)(AddressOf CaptureSource_CaptureCompleted)
    End Sub


    Public Sub Start()
        _captureSource.Start()
        _captureSource.CaptureAsync()
    End Sub

    Public Sub [Stop]()
        _captureSource.[Stop]()
    End Sub

    Private Sub CaptureSource_CaptureCompleted(sender As Object, e As Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs)
        Dim oldImage As Vintasoft.Imaging.VintasoftImage = _viewer.Image
        _viewer.Image = e.GetCapturedImage()
        If oldImage IsNot Nothing Then
            oldImage.Dispose()
        End If

        If _captureSource.State = Vintasoft.Imaging.Media.ImageCaptureState.Started Then
            _captureSource.CaptureAsync()
        End If
    End Sub
End Class

''' <summary>
''' Form for previewing video (captured images) from camera.
''' </summary>
Public Class VideocamForm
    Inherits System.Windows.Forms.Form
    Private _cameraPreview As VideoPreview


    Public Sub New(device As Vintasoft.Imaging.Media.ImageCaptureDevice)
        ' create image viewer
        Dim viewer As New Vintasoft.Imaging.UI.ImageViewer()
        viewer.Anchor = System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right Or System.Windows.Forms.AnchorStyles.Top
        viewer.Size = New System.Drawing.Size(device.DesiredFormat.Width, device.DesiredFormat.Height)
        viewer.SizeMode = Vintasoft.Imaging.UI.ImageSizeMode.BestFit

        ' set form size and caption
        ClientSize = viewer.Size
        Text = device.FriendlyName

        ' add viewer to form
        Controls.Add(viewer)

        ' create video preview
        _cameraPreview = New VideoPreview(viewer, device)
    End Sub


    Protected Overrides Sub OnShown(e As System.EventArgs)
        MyBase.OnShown(e)

        ' start image capturing
        _cameraPreview.Start()
    End Sub

    Protected Overrides Sub OnClosing(e As System.ComponentModel.CancelEventArgs)
        ' stop image capturing
        _cameraPreview.[Stop]()

        MyBase.OnClosing(e)
    End Sub
End Class

''' <summary>
''' Test for previewing video from all available cameras.
''' </summary>
Public Class VideoPreviewTest
    Public Shared Sub ShowVideoFromAllCameras()
        ' get available capture devices
        Dim availableDevices As System.Collections.ObjectModel.ReadOnlyCollection(Of Vintasoft.Imaging.Media.ImageCaptureDevice) = Vintasoft.Imaging.Media.ImageCaptureDeviceConfiguration.GetCaptureDevices()
        If availableDevices.Count = 0 Then
            Throw New System.InvalidOperationException("No connected devices.")
        End If

        ' set device desired formats
        For Each device As Vintasoft.Imaging.Media.ImageCaptureDevice In availableDevices
            device.DesiredFormat = device.SupportedFormats(0)
        Next

        ' preview video from all available cameras
        For Each device As Vintasoft.Imaging.Media.ImageCaptureDevice In availableDevices
            ' preview video from camera in the first form
            Dim myForm As New VideocamForm(device)
            myForm.Show()

            ' preview video from camera in the second form
            Dim myForm2 As New VideocamForm(device)
            myForm2.Width = myForm2.Width \ 2
            myForm2.Height = myForm2.Height \ 2
            myForm2.Show()
        Next

        ' if is console application
        'Application.Run();
    End Sub

End Class

/// <summary>
/// Class that implements image capturing from camera and previewing of captured images in image viewer.
/// </summary>
public class VideoPreview
{
    /// <summary>
    /// Image viewer where captured images must be shown.
    /// </summary>
    Vintasoft.Imaging.UI.ImageViewer _viewer;
    
    /// <summary>
    /// Image capture source.
    /// </summary>
    Vintasoft.Imaging.Media.ImageCaptureSource _captureSource;


    public VideoPreview(
        Vintasoft.Imaging.UI.ImageViewer viewer, 
        Vintasoft.Imaging.Media.ImageCaptureDevice captureDevice)
    {
        _viewer = viewer;

        _captureSource = new Vintasoft.Imaging.Media.ImageCaptureSource();
        _captureSource.CaptureDevice = captureDevice;
        _captureSource.CaptureCompleted += 
            new System.EventHandler<Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs>(CaptureSource_CaptureCompleted);
    }
  

    public void Start()
    {
        _captureSource.Start();
        _captureSource.CaptureAsync();
    }

    public void Stop()
    {
        _captureSource.Stop();
    }

    private void CaptureSource_CaptureCompleted(object sender, Vintasoft.Imaging.Media.ImageCaptureCompletedEventArgs e)
    {
        Vintasoft.Imaging.VintasoftImage oldImage = _viewer.Image;
        _viewer.Image = e.GetCapturedImage();
        if (oldImage != null)
            oldImage.Dispose();

        if (_captureSource.State == Vintasoft.Imaging.Media.ImageCaptureState.Started)
            _captureSource.CaptureAsync();
    }
}

/// <summary>
/// Form for previewing video (captured images) from camera.
/// </summary>
public class VideocamForm : System.Windows.Forms.Form
{
    VideoPreview _cameraPreview;


    public VideocamForm(Vintasoft.Imaging.Media.ImageCaptureDevice device)
    {        
        // create image viewer
        Vintasoft.Imaging.UI.ImageViewer viewer = new Vintasoft.Imaging.UI.ImageViewer();
        viewer.Anchor =
            System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left |
            System.Windows.Forms.AnchorStyles.Right | System.Windows.Forms.AnchorStyles.Top;
        viewer.Size =
            new System.Drawing.Size(device.DesiredFormat.Width, device.DesiredFormat.Height);
        viewer.SizeMode = Vintasoft.Imaging.UI.ImageSizeMode.BestFit;

        // set form size and caption
        ClientSize = viewer.Size;
        Text = device.FriendlyName;

        // add viewer to form
        Controls.Add(viewer);

        // create video preview
        _cameraPreview = new VideoPreview(viewer, device);
    }


    protected override void OnShown(System.EventArgs e)
    {
        base.OnShown(e);

        // start image capturing
        _cameraPreview.Start();
    }

    protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
    {
        // stop image capturing
        _cameraPreview.Stop();

        base.OnClosing(e);        
    }
}

/// <summary>
/// Test for previewing video from all available cameras.
/// </summary>
public class VideoPreviewTest
{
    public static void ShowVideoFromAllCameras()
    {
        // get available capture devices
        System.Collections.ObjectModel.ReadOnlyCollection<Vintasoft.Imaging.Media.ImageCaptureDevice> availableDevices =
            Vintasoft.Imaging.Media.ImageCaptureDeviceConfiguration.GetCaptureDevices();
        if (availableDevices.Count == 0)
            throw new System.InvalidOperationException("No connected devices.");

        // set device desired formats
        foreach (Vintasoft.Imaging.Media.ImageCaptureDevice device in availableDevices)
            device.DesiredFormat = device.SupportedFormats[0];

        // preview video from all available cameras
        foreach (Vintasoft.Imaging.Media.ImageCaptureDevice device in availableDevices)
        {
            // preview video from camera in the first form
            VideocamForm myForm = new VideocamForm(device);
            myForm.Show();

            // preview video from camera in the second form
            VideocamForm myForm2 = new VideocamForm(device);
            myForm2.Width = myForm2.Width / 2;
            myForm2.Height = myForm2.Height / 2;
            myForm2.Show();
        }

        // if is console application
        //Application.Run();
    }

}