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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2484 | - | 1 | using System; |
| 2 | using System.ComponentModel.Composition; |
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| 3 | using Touchless.Vision.Camera.Configuration; |
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| 4 | using Touchless.Vision.Contracts; |
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| 5 | |||
| 6 | namespace Touchless.Vision.Camera |
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| 7 | { |
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| 8 | [Export(typeof(IFrameSource))] |
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| 9 | public class CameraFrameSource : IFrameSource |
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| 10 | { |
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| 11 | public event Action<IFrameSource, Frame, double> NewFrame; |
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| 12 | |||
| 13 | public bool IsCapturing { get; private set; } |
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| 14 | |||
| 15 | private Camera _camera; |
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| 16 | public Camera Camera |
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| 17 | { |
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| 18 | get { return _camera; } |
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| 19 | |||
| 20 | internal set |
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| 21 | { |
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| 22 | if (_camera != value) |
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| 23 | { |
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| 24 | bool restart = IsCapturing; |
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| 25 | if (IsCapturing) |
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| 26 | { |
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| 27 | StopFrameCapture(); |
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| 28 | } |
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| 29 | |||
| 30 | _camera = value; |
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| 31 | |||
| 32 | if (restart) |
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| 33 | { |
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| 34 | StartFrameCapture(); |
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| 35 | } |
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| 36 | } |
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| 37 | } |
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| 38 | } |
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| 39 | |||
| 40 | [ImportingConstructor] |
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| 41 | public CameraFrameSource([Import(ExportInterfaceNames.DefaultCamera)] Camera camera) |
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| 42 | { |
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| 43 | if (camera == null) throw new ArgumentNullException("camera"); |
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| 44 | |||
| 45 | this.Camera = camera; |
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| 46 | } |
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| 47 | |||
| 48 | public bool StartFrameCapture() |
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| 49 | { |
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| 50 | bool result; |
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| 51 | |||
| 52 | if (result = !IsCapturing && this.Camera != null) |
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| 53 | { |
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| 54 | this.Camera.OnImageCaptured += OnImageCaptured; |
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| 55 | IsCapturing = result = this.Camera.StartCapture(); |
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| 56 | } |
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| 57 | |||
| 58 | return result; |
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| 59 | } |
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| 60 | |||
| 61 | public void StopFrameCapture() |
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| 62 | { |
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| 63 | if (IsCapturing) |
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| 64 | { |
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| 65 | this.Camera.StopCapture(); |
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| 66 | this.Camera.OnImageCaptured -= OnImageCaptured; |
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| 67 | this.IsCapturing = false; |
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| 68 | } |
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| 69 | } |
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| 70 | |||
| 71 | private void OnImageCaptured(object sender, CameraEventArgs e) |
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| 72 | { |
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| 73 | var handler = this.NewFrame; |
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| 74 | if (IsCapturing && handler != null) |
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| 75 | { |
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| 76 | var frame = new Frame(e.Image); |
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| 77 | handler(this, frame, e.CameraFps); |
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| 78 | } |
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| 79 | } |
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| 80 | |||
| 81 | public string Name |
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| 82 | { |
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| 83 | get { return "Touchless Camera Frame Source"; } |
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| 84 | } |
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| 85 | |||
| 86 | public string Description |
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| 87 | { |
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| 88 | get { return "Retrieves frames from Camera"; } |
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| 89 | } |
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| 90 | |||
| 91 | public bool HasConfiguration |
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| 92 | { |
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| 93 | get { return true; } |
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| 94 | } |
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| 95 | |||
| 96 | |||
| 97 | public System.Windows.UIElement ConfigurationElement |
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| 98 | { |
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| 99 | get |
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| 100 | { |
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| 101 | return new CameraFrameSourceConfigurationElement(this); |
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| 102 | } |
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| 103 | } |
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| 104 | } |
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| 105 | } |