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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,7 @@ | ||
| using Grid = Microsoft.UI.Xaml.Controls.Grid; | ||
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| namespace BarcodeScanning; | ||
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| public class BarcodeView : Grid | ||
| { | ||
| } |
230 changes: 230 additions & 0 deletions
230
BarcodeScanning.Native.Maui/Platform/Windows/CameraManager.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,230 @@ | ||
| using Microsoft.UI.Xaml.Controls; | ||
| using Windows.Media.Capture; | ||
| using Windows.Media.Capture.Frames; | ||
| using Windows.Media.Core; | ||
| using Windows.Media.Devices; | ||
| using Windows.Media.MediaProperties; | ||
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| using Border = Microsoft.UI.Xaml.Controls.Border; | ||
| using SolidColorBrush = Microsoft.UI.Xaml.Media.SolidColorBrush; | ||
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| namespace BarcodeScanning; | ||
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| internal class CameraManager : IDisposable | ||
| { | ||
| internal BarcodeView BarcodeView { get => _barcodeView; } | ||
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| private readonly BarcodeView _barcodeView; | ||
| private readonly Border _aimDot; | ||
| private readonly CameraView _cameraView; | ||
| private MediaCapture _mediaCapture; | ||
| private MediaFrameSourceInfo _selectedCamera; | ||
| private MediaFrameReader _mediaFrameReader; | ||
| private readonly MediaPlayerElement _mediaPlayerElement; | ||
| private readonly SemaphoreSlim _mediaCaptureLock; | ||
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| private const int aimDotRadius = 20; | ||
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| internal CameraManager(CameraView cameraView) | ||
| { | ||
| _cameraView = cameraView; | ||
| _mediaCaptureLock = new SemaphoreSlim(1); | ||
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| _barcodeView = new BarcodeView(); | ||
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| _mediaPlayerElement = new MediaPlayerElement() | ||
| { | ||
| HorizontalAlignment = Microsoft.UI.Xaml.HorizontalAlignment.Center, | ||
| VerticalAlignment = Microsoft.UI.Xaml.VerticalAlignment.Center, | ||
| Stretch = Microsoft.UI.Xaml.Media.Stretch.UniformToFill | ||
| }; | ||
| _aimDot = new Border() | ||
| { | ||
| Background = new SolidColorBrush(Windows.UI.Color.FromArgb(156, 255, 0, 0)), | ||
| HorizontalAlignment = Microsoft.UI.Xaml.HorizontalAlignment.Center, | ||
| VerticalAlignment = Microsoft.UI.Xaml.VerticalAlignment.Center, | ||
| Width = aimDotRadius, | ||
| Height = aimDotRadius, | ||
| CornerRadius = new Microsoft.UI.Xaml.CornerRadius(aimDotRadius / 2) | ||
| }; | ||
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| _barcodeView.Children.Add(_mediaPlayerElement); | ||
| } | ||
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| internal void Start() | ||
| { | ||
| MainThread.BeginInvokeOnMainThread(async () => | ||
| { | ||
| if (_selectedCamera is null) | ||
| UpdateCamera(); | ||
| if (_mediaCapture is null) | ||
| { | ||
| _mediaCapture = new MediaCapture(); | ||
| await _mediaCapture.InitializeAsync(new MediaCaptureInitializationSettings() | ||
| { | ||
| SourceGroup = await MediaFrameSourceGroup.FromIdAsync(_selectedCamera.Id), | ||
| SharingMode = MediaCaptureSharingMode.ExclusiveControl, | ||
| StreamingCaptureMode = StreamingCaptureMode.Video, | ||
| MemoryPreference = MediaCaptureMemoryPreference.Cpu | ||
| }); | ||
| UpdateResolution(); | ||
| _mediaPlayerElement.Source = MediaSource.CreateFromMediaFrameSource(_mediaCapture?.FrameSources[_selectedCamera?.Id]); | ||
| } | ||
| if (_mediaFrameReader is null) | ||
| { | ||
| _mediaFrameReader = await _mediaCapture.CreateFrameReaderAsync(_mediaCapture?.FrameSources[_selectedCamera?.Id], MediaEncodingSubtypes.Argb32); | ||
| _mediaFrameReader.AcquisitionMode = MediaFrameReaderAcquisitionMode.Realtime; | ||
| //_mediaFrameReader.FrameArrived += ColorFrameReader_FrameArrived; | ||
| } | ||
| await _mediaFrameReader.StartAsync(); | ||
| }); | ||
| } | ||
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| internal void Stop() | ||
| { | ||
| MainThread.BeginInvokeOnMainThread(async () => | ||
| { | ||
| if (_mediaCapture?.VideoDeviceController?.TorchControl?.Enabled ?? false) | ||
| { | ||
| _mediaCapture.VideoDeviceController.TorchControl.Enabled = false; | ||
| if (_cameraView is not null) | ||
| _cameraView.TorchOn = false; | ||
| } | ||
| if (_mediaFrameReader is not null) | ||
| await _mediaFrameReader.StopAsync(); | ||
| }); | ||
| } | ||
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| internal void UpdateCamera() | ||
| { | ||
| MainThread.BeginInvokeOnMainThread(async () => | ||
| { | ||
| var mediaFrameSourceGroups = await MediaFrameSourceGroup.FindAllAsync(); | ||
| MediaFrameSourceInfo newCamera = null; | ||
| if (_cameraView?.CameraFacing == CameraFacing.Front) | ||
| { | ||
| newCamera = mediaFrameSourceGroups | ||
| .SelectMany(s => s.SourceInfos) | ||
| .Where(w => w.MediaStreamType == MediaStreamType.VideoRecord && w.DeviceInformation?.EnclosureLocation?.Panel == Windows.Devices.Enumeration.Panel.Front) | ||
| .FirstOrDefault(); | ||
| } | ||
| newCamera ??= mediaFrameSourceGroups | ||
| .SelectMany(s => s.SourceInfos) | ||
| .Where(w => w.MediaStreamType == MediaStreamType.VideoRecord) | ||
| .FirstOrDefault(); | ||
| if (newCamera is null) | ||
| return; | ||
| if (_selectedCamera != newCamera && _mediaCapture is not null) | ||
| { | ||
| if (_mediaCapture.CameraStreamState == CameraStreamState.Streaming) | ||
| await _mediaFrameReader?.StopAsync(); | ||
| //_mediaFrameReader.FrameArrived -= ColorFrameReader_FrameArrived; | ||
| _mediaFrameReader.Dispose(); | ||
| _mediaCapture.Dispose(); | ||
| _selectedCamera = newCamera; | ||
| ReportZoomFactors(); | ||
| } | ||
| }); | ||
| } | ||
|
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| internal void UpdateTorch() | ||
| { | ||
| if (_mediaCapture?.VideoDeviceController?.TorchControl?.Supported ?? false) | ||
| _mediaCapture.VideoDeviceController.TorchControl.Enabled = _cameraView?.TorchOn ?? false; | ||
| } | ||
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| internal void UpdateZoomFactor() | ||
| { | ||
| if (_mediaCapture?.VideoDeviceController?.ZoomControl?.Supported ?? false) | ||
| { | ||
| var factor = _cameraView?.RequestZoomFactor ?? -1; | ||
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| if (factor < 0) | ||
| return; | ||
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| var minValue = _cameraView?.MinZoomFactor ?? -1; | ||
| var maxValue = _cameraView?.MaxZoomFactor ?? -1; | ||
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| if (factor < minValue) | ||
| factor = minValue; | ||
| if (factor > maxValue) | ||
| factor = maxValue; | ||
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| if (factor > 0) | ||
| _mediaCapture.VideoDeviceController.ZoomControl.Value = factor; | ||
| } | ||
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| ReportZoomFactors(); | ||
| } | ||
|
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| internal void UpdateResolution() | ||
| { | ||
| if (_selectedCamera is null) | ||
| return; | ||
| //TODO resolution translator | ||
| MainThread.BeginInvokeOnMainThread(async () => | ||
| { | ||
| var frameSource = _mediaCapture?.FrameSources[_selectedCamera?.Id]; | ||
| var preferredFormat = frameSource.SupportedFormats | ||
| .Where(w => w.VideoFormat.Width == 1280 && w.VideoFormat.Height == 720) | ||
| .OrderByDescending(o => (decimal)o.FrameRate.Numerator / (decimal)o.FrameRate.Denominator) | ||
| .FirstOrDefault(); | ||
| if (preferredFormat is not null) | ||
| await frameSource.SetFormatAsync(preferredFormat); | ||
| }); | ||
| } | ||
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| internal void HandleCameraEnabled() | ||
| { | ||
| if (_cameraView?.CameraEnabled ?? false) | ||
| Start(); | ||
| else | ||
| Stop(); | ||
| } | ||
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| internal void HandleAimMode() | ||
| { | ||
| if (_cameraView?.AimMode ?? false) | ||
| _barcodeView?.Children.Add(_aimDot); | ||
| else | ||
| _barcodeView?.Children.Remove(_aimDot); | ||
| } | ||
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| private void ReportZoomFactors() | ||
| { | ||
| if (_cameraView is not null && (_mediaCapture?.VideoDeviceController?.ZoomControl?.Supported ?? false)) | ||
| { | ||
| _cameraView.CurrentZoomFactor = _mediaCapture.VideoDeviceController.ZoomControl.Value; | ||
| _cameraView.MinZoomFactor = _mediaCapture.VideoDeviceController.ZoomControl.Min; | ||
| _cameraView.MaxZoomFactor = _mediaCapture.VideoDeviceController.ZoomControl.Max; | ||
| } | ||
| } | ||
|
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| public void Dispose() | ||
| { | ||
| Dispose(true); | ||
| GC.SuppressFinalize(this); | ||
| } | ||
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| protected virtual void Dispose(bool disposing) | ||
| { | ||
| if (disposing) | ||
| { | ||
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| } | ||
| } | ||
| } |
10 changes: 10 additions & 0 deletions
10
BarcodeScanning.Native.Maui/Platform/Windows/CameraViewHandler.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| namespace BarcodeScanning; | ||
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| public partial class CameraViewHandler | ||
| { | ||
| protected override BarcodeView CreatePlatformView() | ||
| { | ||
| _cameraManager = new CameraManager(VirtualView); | ||
| return _cameraManager.BarcodeView; | ||
| } | ||
| } |