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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| using Emgu.CV; | ||
| using Emgu.CV.CvEnum; | ||
| using Microsoft.Extensions.Logging; | ||
| using System.Drawing.Imaging; | ||
| using System.IO; | ||
| using System.Windows.Media.Imaging; | ||
| using System.Windows.Threading; | ||
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| namespace FinTrackForWindows.Services.Camera | ||
| { | ||
| public class CameraService : ICameraService | ||
| { | ||
| private VideoCapture? _capture; | ||
| private VideoWriter? _writer; | ||
| private DispatcherTimer? _timer; | ||
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| private readonly ILogger<CameraService> _logger; | ||
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| public Action<BitmapSource>? OnFrameReady { get; set; } | ||
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Check warning on line 19 in FinTrack/Services/Camera/CameraService.cs
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| public CameraService(ILogger<CameraService> logger) | ||
| { | ||
| _logger = logger; | ||
| } | ||
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| public bool InitializeCamera(int cameraIndex = 0) | ||
| { | ||
| try | ||
| { | ||
| _capture = new VideoCapture(cameraIndex); | ||
| if (!_capture.IsOpened) return false; | ||
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| double fps = _capture.Get(CapProp.Fps); | ||
| _timer = new DispatcherTimer | ||
| { | ||
| Interval = TimeSpan.FromMilliseconds(1000 / (fps > 0 ? fps : 30)) | ||
| }; | ||
| _timer.Tick += Timer_Tick; | ||
| _timer.Start(); | ||
| return true; | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| _logger.LogError(ex, "Failed to initialize camera."); | ||
| return false; | ||
| } | ||
| } | ||
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| private void Timer_Tick(object? sender, EventArgs e) | ||
| { | ||
| if (_capture == null || !_capture.IsOpened) return; | ||
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| using (Mat frame = _capture.QueryFrame()) | ||
| { | ||
| if (frame != null) | ||
| { | ||
| OnFrameReady?.Invoke(ConvertMatToBitmapSource(frame)); | ||
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| if (_writer != null && _writer.IsOpened) | ||
| { | ||
| _writer.Write(frame); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| public string StartRecording() | ||
| { | ||
| if (_capture == null || !_capture.IsOpened) | ||
| throw new InvalidOperationException("Camera is not initialized."); | ||
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| string tempPath = Path.GetTempPath(); | ||
| string outputFilePath = Path.Combine(tempPath, $"debt_video_{Guid.NewGuid()}.mp4"); | ||
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| int frameWidth = (int)_capture.Get(CapProp.FrameWidth); | ||
| int frameHeight = (int)_capture.Get(CapProp.FrameHeight); | ||
| double fps = _capture.Get(CapProp.Fps); | ||
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| _writer = new VideoWriter(outputFilePath, VideoWriter.Fourcc('X', '2', '6', '4'), fps > 0 ? fps : 30, new System.Drawing.Size(frameWidth, frameHeight), true); | ||
| return outputFilePath; | ||
| } | ||
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| public void StopRecording() | ||
| { | ||
| _writer?.Dispose(); | ||
| _writer = null; | ||
| } | ||
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| public void Release() | ||
| { | ||
| _timer?.Stop(); | ||
| _capture?.Dispose(); | ||
| _writer?.Dispose(); | ||
| } | ||
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| public void Dispose() | ||
| { | ||
| Release(); | ||
| GC.SuppressFinalize(this); | ||
| } | ||
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| private static BitmapSource ConvertMatToBitmapSource(Mat image) | ||
| { | ||
| using var bitmap = image.ToBitmap(); | ||
| using var stream = new MemoryStream(); | ||
| bitmap.Save(stream, ImageFormat.Bmp); | ||
| stream.Position = 0; | ||
| var bitmapImage = new BitmapImage(); | ||
| bitmapImage.BeginInit(); | ||
| bitmapImage.StreamSource = stream; | ||
| bitmapImage.CacheOption = BitmapCacheOption.OnLoad; | ||
| bitmapImage.EndInit(); | ||
| bitmapImage.Freeze(); | ||
| return bitmapImage; | ||
| } | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| using System.Windows.Media.Imaging; | ||
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| namespace FinTrackForWindows.Services.Camera | ||
| { | ||
| public interface ICameraService : IDisposable | ||
| { | ||
| Action<BitmapSource> OnFrameReady { get; set; } | ||
| bool InitializeCamera(int cameraIndex = 0); | ||
| string StartRecording(); | ||
| void StopRecording(); | ||
| void Release(); | ||
| } | ||
| } |
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[nitpick] Consider using an event instead of an Action property for better encapsulation and thread safety. This would prevent external code from setting the callback to null accidentally.