prevent desktopCaturer from running unless visualizer explicitly requested (#1931)

src/main/features/core/index.ts

@@ -4,3 +4,4 @@ import './player';
 import './remote';
 import './settings';
 import './discord-rpc';
+import './visualizer';

src/main/features/core/visualizer/index.ts

@@ -0,0 +1,30 @@
+import { ipcMain } from 'electron';
+
+import { getMpvInstance } from '../player';
+import { store } from '../settings';
+
+import { PlayerType } from '/@/shared/types/types';
+
+let isLocalVisualizerSurfaceVisible = false;
+
+export const setLocalVisualizerSurfaceVisible = (visible: boolean) => {
+    isLocalVisualizerSurfaceVisible = visible;
+};
+
+export const canHandleVisualizerDisplayMedia = (): boolean => {
+    const playbackType = store.get('playbackType', PlayerType.WEB) as PlayerType;
+
+    if (playbackType !== PlayerType.LOCAL) {
+        return false;
+    }
+
+    if (!isLocalVisualizerSurfaceVisible) {
+        return false;
+    }
+
+    return Boolean(getMpvInstance()?.isRunning());
+};
+
+ipcMain.on('visualizer-set-local-surface-visible', (_event, visible: boolean) => {
+    setLocalVisualizerSurfaceVisible(Boolean(visible));
+});