add:展台

2026-02-19 18:18:47 +08:00
parent 9ef764ffa1
commit 432cc3825e
3 changed files with 61 additions and 21 deletions
@@ -46,6 +46,7 @@ namespace Ink_Canvas

            VideoPresenterSidebar.Visibility = Visibility.Visible;
            EnsureCameraService();
+            if (BtnCapturePhoto != null) BtnCapturePhoto.IsEnabled = false;
            RefreshVideoPresenterDeviceList();

            if (CheckBoxEnablePhotoCorrection != null)
@@ -86,16 +87,25 @@ namespace Ink_Canvas

            try
            {
-                Bitmap copy;
+                Bitmap serviceCopy;
+                try
+                {
+                    serviceCopy = (Bitmap)frame.Clone();
+                }
+                catch
+                {
+                    // 可能在下一帧到来时被 CameraService 释放，直接忽略这一帧
+                    return;
+                }
+
                lock (_videoPresenterFrameLock)
                {
                    _lastFrame?.Dispose();
-                    _lastFrame = (Bitmap)frame.Clone();
-                    copy = (Bitmap)_lastFrame.Clone();
+                    _lastFrame = (Bitmap)serviceCopy.Clone();
                }

-                var preview = ConvertBitmapToBitmapImage(copy);
-                copy.Dispose();
+                var preview = ConvertBitmapToBitmapImage(serviceCopy);
+                serviceCopy.Dispose();
                if (preview == null) return;

                Dispatcher.BeginInvoke(new Action(() =>
@@ -154,6 +164,19 @@ namespace Ink_Canvas
                rb.Checked += (s, e) => StartVideoPresenterPreview(idx);
                CameraDevicesStackPanel.Children.Add(rb);
            }
+
+            // 自动启动第一个摄像头
+            if (_cameraService.AvailableCameras.Count > 0)
+            {
+                if (CameraDevicesStackPanel.Children.Count > 0 && CameraDevicesStackPanel.Children[0] is RadioButton first)
+                {
+                    first.IsChecked = true;
+                }
+                else
+                {
+                    StartVideoPresenterPreview(0);
+                }
+            }
        }

        private void StartVideoPresenterPreview(int cameraIndex)