snapshot of https://github.com/jitsi/jitsi-meet.git @ fd1749dd28f4138aa80234fc7f311b19aaffa0e7 (2026-09-15)

react/features/screen-share/middleware.ts

@@ -0,0 +1,72 @@
+import { IStore } from '../app/types';
+import { CONFERENCE_JOINED } from '../base/conference/actionTypes';
+import { MEDIA_TYPE } from '../base/media/constants';
+import MiddlewareRegistry from '../base/redux/MiddlewareRegistry';
+
+import { SET_SCREENSHARE_CAPTURE_FRAME_RATE, SET_SCREEN_AUDIO_SHARE_STATE } from './actionTypes';
+import logger from './logger';
+
+/**
+ * Implements the middleware of the feature screen-share.
+ *
+ * @param {Store} store - The redux store.
+ * @returns {Function}
+ */
+MiddlewareRegistry.register(store => next => action => {
+    const result = next(action);
+    const { getState } = store;
+    const state = getState();
+
+    switch (action.type) {
+    case CONFERENCE_JOINED: {
+        _setScreenshareCaptureFps(store);
+        break;
+    }
+    case SET_SCREENSHARE_CAPTURE_FRAME_RATE: {
+        const { captureFrameRate } = action;
+
+        _setScreenshareCaptureFps(store, captureFrameRate);
+        break;
+    }
+
+    case SET_SCREEN_AUDIO_SHARE_STATE: {
+        const { isSharingAudio } = action;
+        const { participantId } = state['features/large-video'];
+
+        if (isSharingAudio) {
+            logger.debug(`User with id: ${participantId} playing audio sharing.`);
+            APP.API.notifyAudioOrVideoSharingToggled(MEDIA_TYPE.AUDIO, 'playing', participantId);
+        } else {
+            logger.debug(`User with id: ${participantId} stop audio sharing.`);
+            APP.API.notifyAudioOrVideoSharingToggled(MEDIA_TYPE.AUDIO, 'stop', participantId);
+        }
+    }
+    }
+
+    return result;
+});
+
+/**
+ * Sets the capture frame rate for screenshare.
+ *
+ * @param {Store} store - The redux store.
+ * @param {number} frameRate - Frame rate to be configured.
+ * @private
+ * @returns {void}
+ */
+function _setScreenshareCaptureFps(store: IStore, frameRate?: number) {
+    const state = store.getState();
+    const { conference } = state['features/base/conference'];
+    const { captureFrameRate } = state['features/screen-share'];
+    const screenShareFps = frameRate ?? captureFrameRate;
+
+    if (!conference) {
+        return;
+    }
+
+    if (screenShareFps) {
+        logger.debug(`Setting screenshare capture frame rate as ${screenShareFps}`);
+        conference.setDesktopSharingFrameRate(screenShareFps);
+    }
+
+}