Show "please grant mic access" info

If the browser does not have the permission to use the microphone,
OpenSlides will show a spinner to inform the user to grant
mic access

client/src/app/core/ui-services/user-media-perm.service.spec.ts

@@ -0,0 +1,18 @@
+import { TestBed } from '@angular/core/testing';
+
+import { E2EImportsModule } from 'e2e-imports.module';
+
+import { UserMediaPermService } from './user-media-perm.service';
+
+describe('UserMediaPermService', () => {
+    let service: UserMediaPermService;
+
+    beforeEach(() => {
+        TestBed.configureTestingModule({ imports: [E2EImportsModule] });
+        service = TestBed.inject(UserMediaPermService);
+    });
+
+    it('should be created', () => {
+        expect(service).toBeTruthy();
+    });
+});

client/src/app/core/ui-services/user-media-perm.service.ts

@@ -0,0 +1,110 @@
+import { marker as _ } from '@biesbjerg/ngx-translate-extract-marker';
+
+import { Injectable } from '@angular/core';
+
+import { TranslateService } from '@ngx-translate/core';
+
+import { OverlayService } from './overlay.service';
+
+const givePermsMessage = _('Please allow OpenSlides to access your microphone and/or camera');
+const accessDeniedMessage = _('Media access is denied');
+const noMicMessage = _('Your device has no Microphone');
+@Injectable({
+    providedIn: 'root'
+})
+export class UserMediaPermService {
+    private hasAudioDevice: boolean;
+    private hasVideoDevice: boolean;
+
+    public constructor(private translate: TranslateService, private overlayService: OverlayService) {}
+
+    public async requestMediaAccess(): Promise<void> {
+        await this.detectAvailableDevices();
+
+        if (!this.hasAudioDevice) {
+            throw new Error(noMicMessage);
+        }
+        const hasMediaAccess: PermissionState | null = await this.detectPermStatus();
+        if (!hasMediaAccess || hasMediaAccess === 'prompt') {
+            await this.tryMediaAccess();
+        } else if (hasMediaAccess === 'denied') {
+            this.throwPermError();
+        }
+    }
+
+    /**
+     * `navigator.permissions.query` does only work in chrome
+     * This function detects if this method works at all.
+     * If it does not work, we try to access the media anyways without
+     * detecting the set permission beforehand.
+     * The negative result would be, that the user sees the
+     * overlay for a very short time.
+     * This cannot be avoided, but rather solves itself if more browsers
+     * start to support the given media query
+     */
+    private async detectPermStatus(): Promise<PermissionState | null> {
+        try {
+            const micPermStatus = await navigator.permissions.query({ name: 'microphone' });
+            const camPermStatus = await navigator.permissions.query({ name: 'camera' });
+
+            if (!this.hasVideoDevice || micPermStatus.state === camPermStatus.state) {
+                return micPermStatus.state;
+            } else if (micPermStatus.state === 'denied' || camPermStatus.state === 'denied') {
+                return 'denied';
+            } else {
+                return null;
+            }
+        } catch (e) {
+            return null;
+        }
+    }
+
+    private async detectAvailableDevices(): Promise<void> {
+        const mediaDevices = await navigator.mediaDevices.enumerateDevices();
+        this.hasAudioDevice = !!mediaDevices.find(device => device.kind === 'audioinput');
+        this.hasVideoDevice = !!mediaDevices.find(device => device.kind === 'videoinput');
+    }
+
+    private async tryMediaAccess(): Promise<void> {
+        this.showAwaitPermInfo();
+        try {
+            const stream: MediaStream = await navigator.mediaDevices.getUserMedia({
+                audio: this.hasAudioDevice,
+                video: this.hasVideoDevice
+            });
+            this.hideAwaitPermInfo();
+
+            if (stream) {
+                stream.getTracks().forEach(track => {
+                    track.stop();
+                });
+            }
+        } catch (e) {
+            if (e instanceof DOMException) {
+                if (e.message === 'Permission denied') {
+                    this.throwPermError();
+                }
+            } else {
+                this.throwPermError(e);
+            }
+        }
+    }
+
+    private throwPermError(error: Error = new Error(accessDeniedMessage)): void {
+        this.hideAwaitPermInfo();
+        console.error(error);
+        throw new Error(this.translate.instant(error.message));
+    }
+
+    /**
+     * Show:
+     * Please allow OpenSlides to use your microphone
+     */
+    private showAwaitPermInfo(): void {
+        this.overlayService.showSpinner(this.translate.instant(givePermsMessage), true);
+    }
+
+    private hideAwaitPermInfo(): void {
+        this.overlayService.hideSpinner();
+    }
+}

client/src/app/shared/components/jitsi/jitsi.component.ts

@@ -12,6 +12,7 @@ import { OperatorService } from 'app/core/core-services/operator.service';
 import { Deferred } from 'app/core/promises/deferred';
 import { UserRepositoryService } from 'app/core/repositories/users/user-repository.service';
 import { ConfigService } from 'app/core/ui-services/config.service';
+import { UserMediaPermService } from 'app/core/ui-services/user-media-perm.service';
 import { UserListIndexType } from 'app/site/agenda/models/view-list-of-speakers';
 import { BaseViewComponentDirective } from 'app/site/base/base-view';
 import { CurrentListOfSpeakersService } from 'app/site/projector/services/current-list-of-speakers.service';
@@ -80,6 +81,8 @@ export class JitsiComponent extends BaseViewComponentDirective implements OnInit
     public enableJitsi: boolean;
 
     private autoconnect: boolean;
+    private startWithMicMuted: boolean;
+    private startWithVideoMuted: boolean;
     private roomName: string;
     private roomPassword: string;
     private jitsiDomain: string;
@@ -184,8 +187,8 @@ export class JitsiComponent extends BaseViewComponentDirective implements OnInit
         startAudioOnly: false,
         // allows jitsi on mobile devices
         disableDeepLinking: true,
-        startWithAudioMuted: true,
+        startWithAudioMuted: this.startWithMicMuted,
-        startWithVideoMuted: true,
+        startWithVideoMuted: this.startWithVideoMuted,
         useNicks: true,
         enableWelcomePage: false,
         enableUserRolesBasedOnToken: false,
@@ -236,7 +239,8 @@ export class JitsiComponent extends BaseViewComponentDirective implements OnInit
         private userRepo: UserRepositoryService,
         private constantsService: ConstantsService,
         private configService: ConfigService,
-        private closService: CurrentListOfSpeakersService
+        private closService: CurrentListOfSpeakersService,
+        private userMediaPermService: UserMediaPermService
     ) {
         super(titleService, translate, snackBar);
     }
@@ -340,6 +344,14 @@ export class JitsiComponent extends BaseViewComponentDirective implements OnInit
             this.configService.get<string>('general_system_stream_url').subscribe(url => {
                 this.videoStreamUrl = url;
                 this.configsLoaded.resolve();
+            }),
+            this.configService.get<boolean>('general_system_conference_open_microphon').subscribe(open => {
+                this.startWithMicMuted = !open;
+                console.log('this.startWithMicMuted ', this.startWithMicMuted);
+            }),
+            this.configService.get<boolean>('general_system_conference_open_video').subscribe(open => {
+                this.startWithVideoMuted = !open;
+                console.log('this.startWithVideoMuted ', this.startWithVideoMuted);
             })
         );
 
@@ -393,6 +405,8 @@ export class JitsiComponent extends BaseViewComponentDirective implements OnInit
 
     public async enterConversation(): Promise<void> {
         await this.operator.loaded;
+        try {
+            await this.userMediaPermService.requestMediaAccess();
             this.storageMap.set(this.RTC_LOGGED_STORAGE_KEY, true).subscribe(() => {});
             this.setConferenceState(ConferenceState.jitsi);
             this.setOptions();
@@ -401,6 +415,9 @@ export class JitsiComponent extends BaseViewComponentDirective implements OnInit
             const jitsiname = this.userRepo.getShortName(this.operator.user);
             this.api.executeCommand('displayName', jitsiname);
             this.loadApiCallbacks();
+        } catch (e) {
+            this.raiseError(e);
+        }
     }
 
     private loadApiCallbacks(): void {

server/openslides/core/config_variables.py

@@ -121,13 +121,31 @@ def get_config_variables():
         subgroup="Live conference",
     )
 
+    yield ConfigVariable(
+        name="general_system_conference_open_microphone",
+        default_value=False,
+        input_type="boolean",
+        label="Automatically open the microphone for new conference speakers",
+        weight=143,
+        subgroup="Live conference",
+    )
+
+    yield ConfigVariable(
+        name="general_system_conference_open_video",
+        default_value=False,
+        input_type="boolean",
+        label="Automatically open the web cam for new conference speakers",
+        weight=144,
+        subgroup="Live conference",
+    )
+
     yield ConfigVariable(
         name="general_system_conference_auto_connect_next_speakers",
         default_value=0,
         input_type="integer",
         label="Number of next speakers automatically connecting to the live conference",
         help_text="Live conference has to be active. Choose 0 to disable auto connect.",
-        weight=143,
+        weight=145,
         subgroup="Live conference",
     )