From ee1819a0b69649f38e8bf06e09563c23ab391a3b Mon Sep 17 00:00:00 2001
From: Daniel Abramov <daniel.abramov@element.io>
Date: Fri, 2 Jun 2023 14:49:11 +0200
Subject: [PATCH] Quick way to replace matrix JS SDK with LiveKit

---
 src/button/Button.tsx                         |  45 ----
 src/button/VolumeIcon.tsx                     |  35 ---
 src/room/GroupCallView.tsx                    |  34 +--
 src/room/InCallView.tsx                       | 232 ++++++++----------
 src/room/useLiveKit.ts                        |  23 +-
 src/video-grid/AudioSink.tsx                  |  47 ----
 src/video-grid/TileDescriptor.tsx             |   4 +-
 src/video-grid/VideoGrid.stories.tsx          |  39 +--
 src/video-grid/VideoTile.tsx                  | 129 +++-------
 src/video-grid/VideoTileContainer.tsx         | 108 ++------
 .../VideoTileSettingsModal.module.css         | 120 ---------
 src/video-grid/VideoTileSettingsModal.tsx     |  82 -------
 src/video-grid/useFullscreen.tsx              |  79 ------
 13 files changed, 177 insertions(+), 800 deletions(-)
 delete mode 100644 src/button/VolumeIcon.tsx
 delete mode 100644 src/video-grid/AudioSink.tsx
 delete mode 100644 src/video-grid/VideoTileSettingsModal.module.css
 delete mode 100644 src/video-grid/VideoTileSettingsModal.tsx
 delete mode 100644 src/video-grid/useFullscreen.tsx

diff --git a/src/button/Button.tsx b/src/button/Button.tsx
index 78b8299b..c4741f7f 100644
--- a/src/button/Button.tsx
+++ b/src/button/Button.tsx
@@ -30,10 +30,7 @@ import { ReactComponent as ScreenshareIcon } from "../icons/Screenshare.svg";
 import { ReactComponent as SettingsIcon } from "../icons/Settings.svg";
 import { ReactComponent as AddUserIcon } from "../icons/AddUser.svg";
 import { ReactComponent as ArrowDownIcon } from "../icons/ArrowDown.svg";
-import { ReactComponent as Fullscreen } from "../icons/Fullscreen.svg";
-import { ReactComponent as FullscreenExit } from "../icons/FullscreenExit.svg";
 import { TooltipTrigger } from "../Tooltip";
-import { VolumeIcon } from "./VolumeIcon";
 
 export type ButtonVariant =
   | "default"
@@ -263,45 +260,3 @@ export function InviteButton({
     </TooltipTrigger>
   );
 }
-
-interface AudioButtonProps extends Omit<Props, "variant"> {
-  /**
-   * A number between 0 and 1
-   */
-  volume: number;
-}
-
-export function AudioButton({ volume, ...rest }: AudioButtonProps) {
-  const { t } = useTranslation();
-  const tooltip = useCallback(() => t("Local volume"), [t]);
-
-  return (
-    <TooltipTrigger tooltip={tooltip}>
-      <Button variant="icon" {...rest}>
-        <VolumeIcon volume={volume} />
-      </Button>
-    </TooltipTrigger>
-  );
-}
-
-interface FullscreenButtonProps extends Omit<Props, "variant"> {
-  fullscreen?: boolean;
-}
-
-export function FullscreenButton({
-  fullscreen,
-  ...rest
-}: FullscreenButtonProps) {
-  const { t } = useTranslation();
-  const tooltip = useCallback(() => {
-    return fullscreen ? t("Exit full screen") : t("Full screen");
-  }, [fullscreen, t]);
-
-  return (
-    <TooltipTrigger tooltip={tooltip}>
-      <Button variant="icon" {...rest}>
-        {fullscreen ? <FullscreenExit /> : <Fullscreen />}
-      </Button>
-    </TooltipTrigger>
-  );
-}
diff --git a/src/button/VolumeIcon.tsx b/src/button/VolumeIcon.tsx
deleted file mode 100644
index d4958e48..00000000
--- a/src/button/VolumeIcon.tsx
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React from "react";
-
-import { ReactComponent as AudioMuted } from "../icons/AudioMuted.svg";
-import { ReactComponent as AudioLow } from "../icons/AudioLow.svg";
-import { ReactComponent as Audio } from "../icons/Audio.svg";
-
-interface Props {
-  /**
-   * Number between 0 and 1
-   */
-  volume: number;
-}
-
-export function VolumeIcon({ volume }: Props) {
-  if (volume <= 0) return <AudioMuted />;
-  if (volume <= 0.5) return <AudioLow />;
-  return <Audio />;
-}
diff --git a/src/room/GroupCallView.tsx b/src/room/GroupCallView.tsx
index b0ec4e82..20ebc286 100644
--- a/src/room/GroupCallView.tsx
+++ b/src/room/GroupCallView.tsx
@@ -29,7 +29,6 @@ import { MatrixInfo } from "./VideoPreview";
 import { InCallView } from "./InCallView";
 import { CallEndedView } from "./CallEndedView";
 import { useSentryGroupCallHandler } from "./useSentryGroupCallHandler";
-import { useLocationNavigation } from "../useLocationNavigation";
 import { PosthogAnalytics } from "../PosthogAnalytics";
 import { useProfile } from "../profile/useProfile";
 import { useLiveKit } from "./useLiveKit";
@@ -62,19 +61,8 @@ export function GroupCallView({
   const {
     state,
     error,
-    activeSpeaker,
-    userMediaFeeds,
-    microphoneMuted,
-    localVideoMuted,
     enter,
     leave,
-    toggleLocalVideoMuted,
-    toggleMicrophoneMuted,
-    toggleScreensharing,
-    setMicrophoneMuted,
-    requestingScreenshare,
-    isScreensharing,
-    screenshareFeeds,
     participants,
     unencryptedEventsFromUsers,
   } = useGroupCall(groupCall);
@@ -97,8 +85,7 @@ export function GroupCallView({
     roomId: roomIdOrAlias,
   };
 
-  // TODO: Pass the correct URL and the correct JWT token here.
-  const lkState = useLiveKit("<SFU_URL_HERE>", "<JWT_TOKEN_HERE>");
+  const lkState = useLiveKit();
 
   useEffect(() => {
     if (widget && preload) {
@@ -134,8 +121,6 @@ export function GroupCallView({
 
   useSentryGroupCallHandler(groupCall);
 
-  useLocationNavigation(requestingScreenshare);
-
   const [left, setLeft] = useState(false);
   const history = useHistory();
 
@@ -191,24 +176,13 @@ export function GroupCallView({
       <InCallView
         groupCall={groupCall}
         client={client}
-        roomName={groupCall.room.name}
-        avatarUrl={avatarUrl}
         participants={participants}
-        mediaDevices={lkState.mediaDevices}
-        microphoneMuted={microphoneMuted}
-        localVideoMuted={localVideoMuted}
-        toggleLocalVideoMuted={toggleLocalVideoMuted}
-        toggleMicrophoneMuted={toggleMicrophoneMuted}
-        setMicrophoneMuted={setMicrophoneMuted}
-        userMediaFeeds={userMediaFeeds}
-        activeSpeaker={activeSpeaker}
         onLeave={onLeave}
-        toggleScreensharing={toggleScreensharing}
-        isScreensharing={isScreensharing}
-        screenshareFeeds={screenshareFeeds}
-        roomIdOrAlias={roomIdOrAlias}
         unencryptedEventsFromUsers={unencryptedEventsFromUsers}
         hideHeader={hideHeader}
+        matrixInfo={matrixInfo}
+        mediaDevices={lkState.mediaDevices}
+        livekitRoom={lkState.room}
       />
     );
   } else if (left) {
diff --git a/src/room/InCallView.tsx b/src/room/InCallView.tsx
index a66b713b..b2435e8d 100644
--- a/src/room/InCallView.tsx
+++ b/src/room/InCallView.tsx
@@ -21,10 +21,17 @@ import { ResizeObserver } from "@juggle/resize-observer";
 import { MatrixClient } from "matrix-js-sdk/src/client";
 import { RoomMember } from "matrix-js-sdk/src/models/room-member";
 import { GroupCall } from "matrix-js-sdk/src/webrtc/groupCall";
-import { CallFeed } from "matrix-js-sdk/src/webrtc/callFeed";
 import classNames from "classnames";
 import { useTranslation } from "react-i18next";
 import { JoinRule } from "matrix-js-sdk/src/@types/partials";
+import { Room, Track } from "livekit-client";
+import {
+  useLiveKitRoom,
+  useLocalParticipant,
+  useParticipants,
+  useToken,
+  useTracks,
+} from "@livekit/components-react";
 
 import type { IWidgetApiRequest } from "matrix-widget-api";
 import styles from "./InCallView.module.css";
@@ -50,10 +57,8 @@ import { Avatar } from "../Avatar";
 import { UserMenuContainer } from "../UserMenuContainer";
 import { useRageshakeRequestModal } from "../settings/submit-rageshake";
 import { RageshakeRequestModal } from "./RageshakeRequestModal";
-import { useShowInspector, useSpatialAudio } from "../settings/useSetting";
+import { useShowInspector } from "../settings/useSetting";
 import { useModalTriggerState } from "../Modal";
-import { useAudioContext } from "../video-grid/useMediaStream";
-import { useFullscreen } from "../video-grid/useFullscreen";
 import { PosthogAnalytics } from "../PosthogAnalytics";
 import { widget, ElementWidgetActions } from "../widget";
 import { useJoinRule } from "./useJoinRule";
@@ -61,9 +66,9 @@ import { useUrlParams } from "../UrlParams";
 import { usePrefersReducedMotion } from "../usePrefersReducedMotion";
 import { ParticipantInfo } from "./useGroupCall";
 import { TileDescriptor } from "../video-grid/TileDescriptor";
-import { AudioSink } from "../video-grid/AudioSink";
 import { useCallViewKeyboardShortcuts } from "../useCallViewKeyboardShortcuts";
 import { MediaDevicesState } from "../settings/mediaDevices";
+import { MatrixInfo } from "./VideoPreview";
 
 const canScreenshare = "getDisplayMedia" in (navigator.mediaDevices ?? {});
 // There is currently a bug in Safari our our code with cloning and sending MediaStreams
@@ -75,46 +80,25 @@ interface Props {
   client: MatrixClient;
   groupCall: GroupCall;
   participants: Map<RoomMember, Map<string, ParticipantInfo>>;
-  roomName: string;
-  avatarUrl: string;
-  mediaDevices: MediaDevicesState;
-  microphoneMuted: boolean;
-  localVideoMuted: boolean;
-  toggleLocalVideoMuted: () => void;
-  toggleMicrophoneMuted: () => void;
-  toggleScreensharing: () => void;
-  setMicrophoneMuted: (muted: boolean) => void;
-  userMediaFeeds: CallFeed[];
-  activeSpeaker: CallFeed | null;
   onLeave: () => void;
-  isScreensharing: boolean;
-  screenshareFeeds: CallFeed[];
-  roomIdOrAlias: string;
   unencryptedEventsFromUsers: Set<string>;
   hideHeader: boolean;
+
+  matrixInfo: MatrixInfo;
+  mediaDevices: MediaDevicesState;
+  livekitRoom: Room;
 }
 
 export function InCallView({
   client,
   groupCall,
   participants,
-  roomName,
-  avatarUrl,
-  mediaDevices,
-  microphoneMuted,
-  localVideoMuted,
-  toggleLocalVideoMuted,
-  toggleMicrophoneMuted,
-  setMicrophoneMuted,
-  userMediaFeeds,
-  activeSpeaker,
   onLeave,
-  toggleScreensharing,
-  isScreensharing,
-  screenshareFeeds,
-  roomIdOrAlias,
   unencryptedEventsFromUsers,
   hideHeader,
+  matrixInfo,
+  mediaDevices,
+  livekitRoom,
 }: Props) {
   const { t } = useTranslation();
   usePreventScroll();
@@ -132,13 +116,49 @@ export function InCallView({
     [containerRef1, containerRef2]
   );
 
-  const { layout, setLayout } = useVideoGridLayout(screenshareFeeds.length > 0);
-  const { toggleFullscreen, fullscreenParticipant } =
-    useFullscreen(containerRef1);
+  const userId = client.getUserId();
+  const deviceId = client.getDeviceId();
+  const options = useMemo(
+    () => ({
+      userInfo: {
+        name: matrixInfo.userName,
+        identity: `${userId}:${deviceId}`,
+      },
+    }),
+    [matrixInfo.userName, userId, deviceId]
+  );
+  const token = useToken(
+    "http://localhost:8080/token",
+    matrixInfo.roomName,
+    options
+  );
 
-  const [spatialAudio] = useSpatialAudio();
+  // Uses a hook to connect to the LiveKit room (on unmount the room will be left) and publish local media tracks (default).
+  useLiveKitRoom({
+    token,
+    serverUrl: "ws://localhost:7880",
+    room: livekitRoom,
+    onConnected: () => {
+      console.log("connected to LiveKit room");
+    },
+    onDisconnected: () => {
+      console.log("disconnected from LiveKit room");
+    },
+    onError: (err) => {
+      console.error("error connecting to LiveKit room", err);
+    },
+  });
+
+  const screenSharingTracks = useTracks(
+    [{ source: Track.Source.ScreenShare, withPlaceholder: false }],
+    {
+      room: livekitRoom,
+    }
+  );
+  const { layout, setLayout } = useVideoGridLayout(
+    screenSharingTracks.length > 0
+  );
 
-  const [audioContext, audioDestination] = useAudioContext();
   const [showInspector] = useShowInspector();
 
   const { modalState: feedbackModalState, modalProps: feedbackModalProps } =
@@ -146,11 +166,28 @@ export function InCallView({
 
   const { hideScreensharing } = useUrlParams();
 
+  const {
+    isMicrophoneEnabled,
+    isCameraEnabled,
+    isScreenShareEnabled,
+    localParticipant,
+  } = useLocalParticipant({ room: livekitRoom });
+
+  const toggleMicrophone = useCallback(async () => {
+    await localParticipant.setMicrophoneEnabled(!isMicrophoneEnabled);
+  }, [localParticipant, isMicrophoneEnabled]);
+  const toggleCamera = useCallback(async () => {
+    await localParticipant.setCameraEnabled(!isCameraEnabled);
+  }, [localParticipant, isCameraEnabled]);
+  const toggleScreenSharing = useCallback(async () => {
+    await localParticipant.setScreenShareEnabled(!isScreenShareEnabled);
+  }, [localParticipant, isScreenShareEnabled]);
+
   useCallViewKeyboardShortcuts(
     !feedbackModalState.isOpen,
-    toggleMicrophoneMuted,
-    toggleLocalVideoMuted,
-    setMicrophoneMuted
+    toggleCamera,
+    toggleMicrophone,
+    async (muted) => await localParticipant.setMicrophoneEnabled(!muted)
   );
 
   useEffect(() => {
@@ -189,27 +226,33 @@ export function InCallView({
     }
   }, [setLayout]);
 
+  const sfuParticipants = useParticipants({
+    room: livekitRoom,
+  });
+
   const items = useMemo(() => {
-    const tileDescriptors: TileDescriptor[] = [];
     const localUserId = client.getUserId()!;
     const localDeviceId = client.getDeviceId()!;
 
     // One tile for each participant, to start with (we want a tile for everyone we
     // think should be in the call, even if we don't have a call feed for them yet)
+    const tileDescriptors: TileDescriptor[] = [];
     for (const [member, participantMap] of participants) {
       for (const [deviceId, { connectionState, presenter }] of participantMap) {
-        const callFeed = userMediaFeeds.find(
-          (f) => f.userId === member.userId && f.deviceId === deviceId
-        );
+        const id = `${member.userId}:${deviceId}`;
+        const sfuParticipant = sfuParticipants.find((p) => p.identity === id);
+
+        const hasScreenShare =
+          sfuParticipant?.getTrack(Track.Source.ScreenShare) !== undefined;
 
         tileDescriptors.push({
-          id: `${member.userId} ${deviceId}`,
+          id,
           member,
-          callFeed,
-          focused: screenshareFeeds.length === 0 && callFeed === activeSpeaker,
-          isLocal: member.userId === localUserId && deviceId === localDeviceId,
+          focused: hasScreenShare && !sfuParticipant?.isLocal,
+          isLocal: member.userId == localUserId && deviceId == localDeviceId,
           presenter,
           connectionState,
+          sfuParticipant,
         });
       }
     }
@@ -218,46 +261,17 @@ export function InCallView({
       tileDescriptors.length
     );
 
-    // Add the screenshares too
-    for (const screenshareFeed of screenshareFeeds) {
-      const member = screenshareFeed.getMember()!;
-      const connectionState = participants
-        .get(member)
-        ?.get(screenshareFeed.deviceId!)?.connectionState;
-
-      // If the participant has left, their screenshare feed is stale and we
-      // shouldn't bother showing it
-      if (connectionState !== undefined) {
-        tileDescriptors.push({
-          id: screenshareFeed.id,
-          member,
-          callFeed: screenshareFeed,
-          focused: true,
-          isLocal: screenshareFeed.isLocal,
-          presenter: false,
-          connectionState,
-        });
-      }
-    }
-
     return tileDescriptors;
-  }, [client, participants, userMediaFeeds, activeSpeaker, screenshareFeeds]);
+  }, [client, participants, sfuParticipants]);
 
   const reducedControls = boundsValid && bounds.width <= 400;
   const noControls = reducedControls && bounds.height <= 400;
 
-  // The maximised participant: either the participant that the user has
-  // manually put in fullscreen, or the focused (active) participant if the
-  // window is too small to show everyone
+  // The maximised participant: the focused (active) participant if the
+  // window is too small to show everyone.
   const maximisedParticipant = useMemo(
-    () =>
-      fullscreenParticipant ??
-      (noControls
-        ? items.find((item) => item.focused) ??
-          items.find((item) => item.callFeed) ??
-          null
-        : null),
-    [fullscreenParticipant, noControls, items]
+    () => (noControls ? items.find((item) => item.focused) ?? null : null),
+    [noControls, items]
   );
 
   const renderAvatar = useCallback(
@@ -296,12 +310,7 @@ export function InCallView({
           key={maximisedParticipant.id}
           item={maximisedParticipant}
           getAvatar={renderAvatar}
-          audioContext={audioContext}
-          audioDestination={audioDestination}
-          disableSpeakingIndicator={true}
           maximised={Boolean(maximisedParticipant)}
-          fullscreen={maximisedParticipant === fullscreenParticipant}
-          onFullscreen={toggleFullscreen}
         />
       );
     }
@@ -323,12 +332,7 @@ export function InCallView({
             key={item.id}
             item={item}
             getAvatar={renderAvatar}
-            audioContext={audioContext}
-            audioDestination={audioDestination}
-            disableSpeakingIndicator={items.length < 3}
             maximised={false}
-            fullscreen={false}
-            onFullscreen={toggleFullscreen}
             {...rest}
           />
         )}
@@ -345,26 +349,6 @@ export function InCallView({
     [styles.maximised]: maximisedParticipant,
   });
 
-  // If spatial audio is disabled, we render one audio tag for each participant
-  // (with spatial audio, all the audio goes via the Web Audio API)
-  // We also do this if there's a feed maximised because we only trigger spatial
-  // audio rendering for feeds that we're displaying, which will need to be fixed
-  // once we start having more participants than we can fit on a screen, but this
-  // is a workaround for now.
-  const audioElements: JSX.Element[] = [];
-  if (!spatialAudio || maximisedParticipant) {
-    for (const item of items) {
-      if (item.isLocal) continue; // We don't want to render own audio
-      audioElements.push(
-        <AudioSink
-          tileDescriptor={item}
-          audioOutput="AUDIO OUTPUT?"
-          key={item.id}
-        />
-      );
-    }
-  }
-
   let footer: JSX.Element | null;
 
   if (noControls) {
@@ -372,25 +356,25 @@ export function InCallView({
   } else if (reducedControls) {
     footer = (
       <div className={styles.footer}>
-        <MicButton muted={microphoneMuted} onPress={toggleMicrophoneMuted} />
-        <VideoButton muted={localVideoMuted} onPress={toggleLocalVideoMuted} />
+        <MicButton muted={!isMicrophoneEnabled} onPress={toggleMicrophone} />
+        <VideoButton muted={!isCameraEnabled} onPress={toggleCamera} />
         <HangupButton onPress={onLeave} />
       </div>
     );
   } else {
     footer = (
       <div className={styles.footer}>
-        <MicButton muted={microphoneMuted} onPress={toggleMicrophoneMuted} />
-        <VideoButton muted={localVideoMuted} onPress={toggleLocalVideoMuted} />
+        <MicButton muted={!isMicrophoneEnabled} onPress={toggleMicrophone} />
+        <VideoButton muted={!isCameraEnabled} onPress={toggleCamera} />
         {canScreenshare && !hideScreensharing && !isSafari && (
           <ScreenshareButton
-            enabled={isScreensharing}
-            onPress={toggleScreensharing}
+            enabled={isScreenShareEnabled}
+            onPress={toggleScreenSharing}
           />
         )}
         {!maximisedParticipant && (
           <OverflowMenu
-            roomId={roomIdOrAlias}
+            roomId={matrixInfo.roomId}
             mediaDevices={mediaDevices}
             inCall
             showInvite={joinRule === JoinRule.Public}
@@ -405,11 +389,13 @@ export function InCallView({
 
   return (
     <div className={containerClasses} ref={containerRef}>
-      <>{audioElements}</>
       {!hideHeader && !maximisedParticipant && (
         <Header>
           <LeftNav>
-            <RoomHeaderInfo roomName={roomName} avatarUrl={avatarUrl} />
+            <RoomHeaderInfo
+              roomName={matrixInfo.roomName}
+              avatarUrl={matrixInfo.avatarUrl}
+            />
             <VersionMismatchWarning
               users={unencryptedEventsFromUsers}
               room={groupCall.room}
@@ -431,7 +417,7 @@ export function InCallView({
       {rageshakeRequestModalState.isOpen && (
         <RageshakeRequestModal
           {...rageshakeRequestModalProps}
-          roomIdOrAlias={roomIdOrAlias}
+          roomIdOrAlias={matrixInfo.roomId}
         />
       )}
     </div>
diff --git a/src/room/useLiveKit.ts b/src/room/useLiveKit.ts
index 46ba70f0..a078c877 100644
--- a/src/room/useLiveKit.ts
+++ b/src/room/useLiveKit.ts
@@ -6,21 +6,20 @@ import { MediaDevicesState, MediaDevices } from "../settings/mediaDevices";
 import { LocalMediaInfo, MediaInfo } from "./VideoPreview";
 
 type LiveKitState = {
+  // The state of the media devices (changing the devices will also change them in the room).
   mediaDevices: MediaDevicesState;
+  // The local media (audio and video) that can be referenced in an e.g. lobby view.
   localMedia: LocalMediaInfo;
-
-  enterRoom: () => Promise<void>;
-  leaveRoom: () => Promise<void>;
+  // A reference to the newly constructed (but not yet entered) room for future use with the LiveKit hooks.
+  // TODO: Abstract this away, so that the user doesn't have to deal with the LiveKit room directly.
+  room: Room;
 };
 
 // Returns the React state for the LiveKit's Room class.
 // The actual return type should be `LiveKitState`, but since this is a React hook, the initialisation is
 // delayed (done after the rendering, not during the rendering), because of that this function may return `undefined`.
 // But soon this state is changed to the actual `LiveKitState` value.
-export function useLiveKit(
-  url: string,
-  token: string
-): LiveKitState | undefined {
+export function useLiveKit(): LiveKitState | undefined {
   // TODO: Pass the proper paramters to configure the room (supported codecs, simulcast, adaptive streaming, etc).
   const [room] = React.useState<Room>(() => {
     return new Room();
@@ -83,19 +82,11 @@ export function useLiveKit(
           setVideoEnabled
         ),
       },
-      enterRoom: async () => {
-        // TODO: Pass connection parameters (autosubscribe, etc.).
-        await room.connect(url, token);
-      },
-      leaveRoom: async () => {
-        await room.disconnect();
-      },
+      room,
     };
 
     setState(state);
   }, [
-    url,
-    token,
     mediaDevices,
     audio.localTrack,
     video.localTrack,
diff --git a/src/video-grid/AudioSink.tsx b/src/video-grid/AudioSink.tsx
deleted file mode 100644
index 24019e4a..00000000
--- a/src/video-grid/AudioSink.tsx
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React from "react";
-
-import { TileDescriptor } from "./TileDescriptor";
-import { useCallFeed } from "./useCallFeed";
-import { useMediaStream } from "./useMediaStream";
-
-interface Props {
-  tileDescriptor: TileDescriptor;
-  audioOutput: string;
-}
-
-// Renders and <audio> element on the page playing the given stream
-// to the given output.
-export const AudioSink: React.FC<Props> = ({
-  tileDescriptor,
-  audioOutput,
-}: Props) => {
-  const { localVolume, stream } = useCallFeed(tileDescriptor.callFeed);
-
-  const audioElementRef = useMediaStream(
-    stream,
-    audioOutput,
-    // We don't compare the audioMuted flag of useCallFeed here, since unmuting
-    // depends on to-device messages which may lag behind the audio actually
-    // starting to flow over the stream
-    tileDescriptor.isLocal,
-    localVolume
-  );
-
-  return <audio ref={audioElementRef} />;
-};
diff --git a/src/video-grid/TileDescriptor.tsx b/src/video-grid/TileDescriptor.tsx
index cc375284..687b1e76 100644
--- a/src/video-grid/TileDescriptor.tsx
+++ b/src/video-grid/TileDescriptor.tsx
@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import { RoomMember } from "matrix-js-sdk";
-import { CallFeed } from "matrix-js-sdk/src/webrtc/callFeed";
+import { LocalParticipant, RemoteParticipant } from "livekit-client";
 
 import { ConnectionState } from "../room/useGroupCall";
 
@@ -26,7 +26,7 @@ export interface TileDescriptor {
   member: RoomMember;
   focused: boolean;
   presenter: boolean;
-  callFeed?: CallFeed;
   isLocal?: boolean;
   connectionState: ConnectionState;
+  sfuParticipant?: LocalParticipant | RemoteParticipant;
 }
diff --git a/src/video-grid/VideoGrid.stories.tsx b/src/video-grid/VideoGrid.stories.tsx
index 986a63d7..084c3ad0 100644
--- a/src/video-grid/VideoGrid.stories.tsx
+++ b/src/video-grid/VideoGrid.stories.tsx
@@ -15,14 +15,9 @@ limitations under the License.
 */
 
 import React, { useState } from "react";
-import { useMemo } from "react";
-import { RoomMember } from "matrix-js-sdk";
 
-import { VideoGrid, useVideoGridLayout } from "./VideoGrid";
-import { VideoTile } from "./VideoTile";
+import { useVideoGridLayout } from "./VideoGrid";
 import { Button } from "../button";
-import { ConnectionState } from "../room/useGroupCall";
-import { TileDescriptor } from "./TileDescriptor";
 
 export default {
   title: "VideoGrid",
@@ -35,18 +30,6 @@ export const ParticipantsTest = () => {
   const { layout, setLayout } = useVideoGridLayout(false);
   const [participantCount, setParticipantCount] = useState(1);
 
-  const items: TileDescriptor[] = useMemo(
-    () =>
-      new Array(participantCount).fill(undefined).map((_, i) => ({
-        id: (i + 1).toString(),
-        member: new RoomMember("!fake:room.id", `@user${i}:fake.dummy`),
-        focused: false,
-        presenter: false,
-        connectionState: ConnectionState.Connected,
-      })),
-    [participantCount]
-  );
-
   return (
     <>
       <div style={{ display: "flex", width: "100vw", height: "32px" }}>
@@ -68,26 +51,6 @@ export const ParticipantsTest = () => {
           </Button>
         )}
       </div>
-      <div
-        style={{
-          display: "flex",
-          width: "100vw",
-          height: "calc(100vh - 32px)",
-        }}
-      >
-        <VideoGrid layout={layout} items={items}>
-          {({ item, ...rest }) => (
-            <VideoTile
-              key={item.id}
-              name={`User ${item.id}`}
-              disableSpeakingIndicator={items.length < 3}
-              connectionState={ConnectionState.Connected}
-              debugInfo={{ width: undefined, height: undefined }}
-              {...rest}
-            />
-          )}
-        </VideoGrid>
-      </div>
     </>
   );
 };
diff --git a/src/video-grid/VideoTile.tsx b/src/video-grid/VideoTile.tsx
index 943cdbcc..8ca5ac9b 100644
--- a/src/video-grid/VideoTile.tsx
+++ b/src/video-grid/VideoTile.tsx
@@ -18,134 +18,63 @@ import React, { forwardRef } from "react";
 import { animated } from "@react-spring/web";
 import classNames from "classnames";
 import { useTranslation } from "react-i18next";
+import { LocalParticipant, RemoteParticipant, Track } from "livekit-client";
+import { useMediaTrack } from "@livekit/components-react";
 
 import styles from "./VideoTile.module.css";
 import { ReactComponent as MicMutedIcon } from "../icons/MicMuted.svg";
 import { ReactComponent as VideoMutedIcon } from "../icons/VideoMuted.svg";
-import { AudioButton, FullscreenButton } from "../button/Button";
-import { ConnectionState } from "../room/useGroupCall";
-import { CallFeedDebugInfo } from "./useCallFeed";
-import { useShowInspector } from "../settings/useSetting";
 
 interface Props {
   name: string;
-  connectionState: ConnectionState;
-  speaking?: boolean;
-  audioMuted?: boolean;
-  videoMuted?: boolean;
-  screenshare?: boolean;
   avatar?: JSX.Element;
-  mediaRef?: React.RefObject<MediaElement>;
-  onOptionsPress?: () => void;
-  localVolume?: number;
-  hasAudio?: boolean;
   maximised?: boolean;
-  fullscreen?: boolean;
-  onFullscreen?: () => void;
   className?: string;
-  showOptions?: boolean;
-  isLocal?: boolean;
-  disableSpeakingIndicator?: boolean;
-  debugInfo: CallFeedDebugInfo;
+  sfuParticipant: LocalParticipant | RemoteParticipant;
 }
 
 export const VideoTile = forwardRef<HTMLDivElement, Props>(
-  (
-    {
-      name,
-      connectionState,
-      speaking,
-      audioMuted,
-      videoMuted,
-      screenshare,
-      avatar,
-      mediaRef,
-      onOptionsPress,
-      localVolume,
-      hasAudio,
-      maximised,
-      fullscreen,
-      onFullscreen,
-      className,
-      showOptions,
-      isLocal,
-      // TODO: disableSpeakingIndicator is not used atm.
-      disableSpeakingIndicator,
-      debugInfo,
-      ...rest
-    },
-    ref
-  ) => {
-    const [showInspector] = useShowInspector();
+  ({ name, avatar, maximised, className, sfuParticipant, ...rest }, ref) => {
     const { t } = useTranslation();
 
-    const toolbarButtons: JSX.Element[] = [];
-    if (connectionState == ConnectionState.Connected && !isLocal) {
-      if (hasAudio) {
-        toolbarButtons.push(
-          <AudioButton
-            key="localVolume"
-            className={styles.button}
-            volume={localVolume}
-            onPress={onOptionsPress}
-          />
-        );
+    const videoEl = React.useRef<HTMLVideoElement>(null);
+    const { isMuted: cameraMuted } = useMediaTrack(
+      Track.Source.Camera,
+      sfuParticipant,
+      {
+        element: videoEl,
       }
+    );
 
-      if (screenshare) {
-        toolbarButtons.push(
-          <FullscreenButton
-            key="fullscreen"
-            className={styles.button}
-            fullscreen={fullscreen}
-            onPress={onFullscreen}
-          />
-        );
+    const audioEl = React.useRef<HTMLAudioElement>(null);
+    const { isMuted: microphoneMuted } = useMediaTrack(
+      Track.Source.Microphone,
+      sfuParticipant,
+      {
+        element: audioEl,
       }
-    }
-
-    let caption: string;
-    switch (connectionState) {
-      case ConnectionState.EstablishingCall:
-        caption = t("{{name}} (Connecting...)", { name });
-        break;
-      case ConnectionState.WaitMedia:
-        // not strictly true, but probably easier to understand than, "Waiting for media"
-        caption = t("{{name}} (Waiting for video...)", { name });
-        break;
-      case ConnectionState.Connected:
-        caption = name;
-        break;
-    }
+    );
 
     return (
       <animated.div
         className={classNames(styles.videoTile, className, {
-          [styles.isLocal]: isLocal,
-          [styles.speaking]: speaking,
-          [styles.muted]: audioMuted,
-          [styles.screenshare]: screenshare,
+          [styles.isLocal]: sfuParticipant.isLocal,
+          [styles.speaking]: sfuParticipant.isSpeaking,
+          [styles.muted]: microphoneMuted,
+          [styles.screenshare]: false,
           [styles.maximised]: maximised,
         })}
         ref={ref}
         {...rest}
       >
-        {showInspector && (
-          <div className={classNames(styles.debugInfo)}>
-            {JSON.stringify(debugInfo)}
-          </div>
-        )}
-        {toolbarButtons.length > 0 && !maximised && (
-          <div className={classNames(styles.toolbar)}>{toolbarButtons}</div>
-        )}
-        {videoMuted && (
+        {cameraMuted && (
           <>
             <div className={styles.videoMutedOverlay} />
             {avatar}
           </>
         )}
         {!maximised &&
-          (screenshare ? (
+          (sfuParticipant.isScreenShareEnabled ? (
             <div className={styles.presenterLabel}>
               <span>{t("{{name}} is presenting", { name })}</span>
             </div>
@@ -156,13 +85,15 @@ export const VideoTile = forwardRef<HTMLDivElement, Props>(
                 Mute state is currently sent over to-device messages, which
                 aren't quite real-time, so this is an important kludge to make
                 sure no one appears muted when they've clearly begun talking. */
-                audioMuted && !videoMuted && !speaking && <MicMutedIcon />
+                microphoneMuted &&
+                  !cameraMuted &&
+                  !sfuParticipant.isSpeaking && <MicMutedIcon />
               }
-              {videoMuted && <VideoMutedIcon />}
-              <span title={caption}>{caption}</span>
+              {cameraMuted && <VideoMutedIcon />}
             </div>
           ))}
-        <video ref={mediaRef} playsInline disablePictureInPicture />
+        <video ref={videoEl} />
+        <audio ref={audioEl} />
       </animated.div>
     );
   }
diff --git a/src/video-grid/VideoTileContainer.tsx b/src/video-grid/VideoTileContainer.tsx
index 7c0a12ea..2ee24255 100644
--- a/src/video-grid/VideoTileContainer.tsx
+++ b/src/video-grid/VideoTileContainer.tsx
@@ -14,17 +14,13 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { SDPStreamMetadataPurpose } from "matrix-js-sdk/src/webrtc/callEventTypes";
 import React from "react";
-import { useCallback, useEffect } from "react";
 import { RoomMember } from "matrix-js-sdk/src/models/room-member";
+import { useTranslation } from "react-i18next";
 
-import { useCallFeed } from "./useCallFeed";
-import { useSpatialMediaStream } from "./useMediaStream";
+import { ConnectionState } from "../room/useGroupCall";
 import { useRoomMemberName } from "./useRoomMemberName";
 import { VideoTile } from "./VideoTile";
-import { VideoTileSettingsModal } from "./VideoTileSettingsModal";
-import { useModalTriggerState } from "../Modal";
 import { TileDescriptor } from "./TileDescriptor";
 
 interface Props {
@@ -36,12 +32,7 @@ interface Props {
     width: number,
     height: number
   ) => JSX.Element;
-  audioContext: AudioContext;
-  audioDestination: AudioNode;
-  disableSpeakingIndicator: boolean;
   maximised: boolean;
-  fullscreen: boolean;
-  onFullscreen: (item: TileDescriptor) => void;
 }
 
 export function VideoTileContainer({
@@ -49,87 +40,36 @@ export function VideoTileContainer({
   width,
   height,
   getAvatar,
-  audioContext,
-  audioDestination,
-  disableSpeakingIndicator,
   maximised,
-  fullscreen,
-  onFullscreen,
   ...rest
 }: Props) {
-  const {
-    isLocal,
-    audioMuted,
-    videoMuted,
-    localVolume,
-    hasAudio,
-    speaking,
-    stream,
-    purpose,
-    debugInfo,
-  } = useCallFeed(item.callFeed);
   const { rawDisplayName } = useRoomMemberName(item.member);
-  const [tileRef, mediaRef] = useSpatialMediaStream(
-    stream ?? null,
-    audioContext,
-    audioDestination,
-    localVolume,
-    // The feed is muted if it's local audio (because we don't want our own audio,
-    // but it's a hook and we can't call it conditionally so we're stuck with it)
-    // or if there's a maximised feed in which case we always render audio via audio
-    // elements because we wire it up at the video tile container level and only one
-    // video tile container is displayed.
-    isLocal || maximised
-  );
-  const {
-    modalState: videoTileSettingsModalState,
-    modalProps: videoTileSettingsModalProps,
-  } = useModalTriggerState();
-  const onOptionsPress = () => {
-    videoTileSettingsModalState.open();
-  };
+  const { t } = useTranslation();
 
-  const onFullscreenCallback = useCallback(() => {
-    onFullscreen(item);
-  }, [onFullscreen, item]);
-
-  // Firefox doesn't respect the disablePictureInPicture attribute
-  // https://bugzilla.mozilla.org/show_bug.cgi?id=1611831
-
-  useEffect(() => {
-    item.callFeed?.setResolution(width, height);
-  }, [width, height, item.callFeed]);
-
-  useEffect(() => {
-    item.callFeed?.setIsVisible(true);
-  }, [item.callFeed]);
+  let caption: string;
+  switch (item.connectionState) {
+    case ConnectionState.EstablishingCall:
+      caption = t("{{name}} (Connecting...)", { name });
+      break;
+    case ConnectionState.WaitMedia:
+      // not strictly true, but probably easier to understand than, "Waiting for media"
+      caption = t("{{name}} (Waiting for video...)", { name });
+      break;
+    case ConnectionState.Connected:
+      caption = rawDisplayName;
+      break;
+  }
 
   return (
     <>
-      <VideoTile
-        isLocal={isLocal}
-        speaking={speaking && !disableSpeakingIndicator}
-        audioMuted={audioMuted}
-        videoMuted={videoMuted}
-        screenshare={purpose === SDPStreamMetadataPurpose.Screenshare}
-        name={rawDisplayName}
-        connectionState={item.connectionState}
-        ref={tileRef}
-        mediaRef={mediaRef}
-        avatar={getAvatar && getAvatar(item.member, width, height)}
-        onOptionsPress={onOptionsPress}
-        localVolume={localVolume}
-        hasAudio={hasAudio}
-        maximised={maximised}
-        fullscreen={fullscreen}
-        onFullscreen={onFullscreenCallback}
-        debugInfo={debugInfo}
-        {...rest}
-      />
-      {videoTileSettingsModalState.isOpen && !maximised && item.callFeed && (
-        <VideoTileSettingsModal
-          {...videoTileSettingsModalProps}
-          feed={item.callFeed}
+      {!item.sfuParticipant && <span title={caption}>{caption}</span>}
+      {item.sfuParticipant && (
+        <VideoTile
+          sfuParticipant={item.sfuParticipant}
+          name={rawDisplayName}
+          avatar={getAvatar && getAvatar(item.member, width, height)}
+          maximised={maximised}
+          {...rest}
         />
       )}
     </>
diff --git a/src/video-grid/VideoTileSettingsModal.module.css b/src/video-grid/VideoTileSettingsModal.module.css
deleted file mode 100644
index 9a6ed55f..00000000
--- a/src/video-grid/VideoTileSettingsModal.module.css
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-.videoTileSettingsModal {
-  width: 700px;
-  height: 316px;
-  display: flex;
-}
-
-.content {
-  position: relative;
-  margin: 27px 34px;
-  height: 100%;
-  display: flex;
-  flex-direction: column;
-  justify-content: center;
-}
-
-.localVolumePercentage {
-  width: 3ch;
-}
-
-.localVolumeSlider[type="range"] {
-  -ms-appearance: none;
-  -moz-appearance: none;
-  -webkit-appearance: none;
-  appearance: none;
-
-  background-color: transparent;
-  --slider-color: var(--quinary-content);
-  --slider-height: 4px;
-  --thumb-color: var(--accent);
-  --thumb-radius: 100%;
-  --thumb-size: 16px;
-  --thumb-margin-top: -6px;
-
-  cursor: pointer;
-  width: 100%;
-}
-
-.localVolumeSlider[type="range"]::-moz-range-track {
-  -moz-appearance: none;
-  appearance: none;
-
-  background-color: var(--slider-color);
-  height: var(--slider-height);
-}
-.localVolumeSlider[type="range"]::-ms-track {
-  -ms-appearance: none;
-  appearance: none;
-
-  background-color: var(--slider-color);
-  height: var(--slider-height);
-}
-.localVolumeSlider[type="range"]::-webkit-slider-runnable-track {
-  -webkit-appearance: none;
-  appearance: none;
-
-  background-color: var(--slider-color);
-  height: var(--slider-height);
-}
-
-.localVolumeSlider[type="range"]::-moz-range-thumb {
-  -moz-appearance: none;
-  appearance: none;
-
-  height: var(--thumb-size);
-  width: var(--thumb-size);
-  margin-top: var(--thumb-margin-top);
-  border-radius: var(--thumb-radius);
-  background: var(--thumb-color);
-}
-.localVolumeSlider[type="range"]::-ms-thumb {
-  -ms-appearance: none;
-  appearance: none;
-
-  height: var(--thumb-size);
-  width: var(--thumb-size);
-  margin-top: var(--thumb-margin-top);
-  border-radius: var(--thumb-radius);
-  background: var(--thumb-color);
-}
-.localVolumeSlider[type="range"]::-webkit-slider-thumb {
-  -webkit-appearance: none;
-  appearance: none;
-
-  height: var(--thumb-size);
-  width: var(--thumb-size);
-  margin-top: var(--thumb-margin-top);
-  border-radius: var(--thumb-radius);
-  background: var(--thumb-color);
-}
-
-.localVolumeSlider[type="range"]::-moz-range-progress {
-  -moz-appearance: none;
-  appearance: none;
-
-  height: var(--slider-height);
-  background: var(--thumb-color);
-}
-.localVolumeSlider[type="range"]::-ms-fill-lower {
-  -moz-appearance: none;
-  appearance: none;
-
-  height: var(--slider-height);
-  background: var(--thumb-color);
-}
diff --git a/src/video-grid/VideoTileSettingsModal.tsx b/src/video-grid/VideoTileSettingsModal.tsx
deleted file mode 100644
index 1e8d8be2..00000000
--- a/src/video-grid/VideoTileSettingsModal.tsx
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React, { ChangeEvent, useState } from "react";
-import { CallFeed } from "matrix-js-sdk/src/webrtc/callFeed";
-import { useTranslation } from "react-i18next";
-
-import { FieldRow } from "../input/Input";
-import { Modal } from "../Modal";
-import styles from "./VideoTileSettingsModal.module.css";
-import { VolumeIcon } from "../button/VolumeIcon";
-
-interface LocalVolumeProps {
-  feed: CallFeed;
-}
-
-const LocalVolume: React.FC<LocalVolumeProps> = ({
-  feed,
-}: LocalVolumeProps) => {
-  const [localVolume, setLocalVolume] = useState<number>(feed.getLocalVolume());
-
-  const onLocalVolumeChanged = (event: ChangeEvent<HTMLInputElement>) => {
-    const value: number = +event.target.value;
-    setLocalVolume(value);
-    feed.setLocalVolume(value);
-  };
-
-  return (
-    <>
-      <FieldRow>
-        <VolumeIcon volume={localVolume} />
-        <input
-          className={styles.localVolumeSlider}
-          type="range"
-          min="0"
-          max="1"
-          step="0.01"
-          value={localVolume}
-          onChange={onLocalVolumeChanged}
-        />
-      </FieldRow>
-    </>
-  );
-};
-
-// TODO: Extend ModalProps
-interface Props {
-  feed: CallFeed;
-  onClose: () => void;
-}
-
-export const VideoTileSettingsModal = ({ feed, onClose, ...rest }: Props) => {
-  const { t } = useTranslation();
-
-  return (
-    <Modal
-      className={styles.videoTileSettingsModal}
-      title={t("Local volume")}
-      isDismissable
-      mobileFullScreen
-      onClose={onClose}
-      {...rest}
-    >
-      <div className={styles.content}>
-        <LocalVolume feed={feed} />
-      </div>
-    </Modal>
-  );
-};
diff --git a/src/video-grid/useFullscreen.tsx b/src/video-grid/useFullscreen.tsx
deleted file mode 100644
index 88968286..00000000
--- a/src/video-grid/useFullscreen.tsx
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
-Copyright 2022 New Vector Ltd
-
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import { logger } from "matrix-js-sdk/src/logger";
-import { useCallback, useEffect, useState } from "react";
-
-import { useEventTarget } from "../useEvents";
-import { TileDescriptor } from "./TileDescriptor";
-import { useCallFeed } from "./useCallFeed";
-
-export function useFullscreen(ref: React.RefObject<HTMLElement>): {
-  toggleFullscreen: (participant: TileDescriptor) => void;
-  fullscreenParticipant: TileDescriptor | null;
-} {
-  const [fullscreenParticipant, setFullscreenParticipant] =
-    useState<TileDescriptor | null>(null);
-  const { disposed } = useCallFeed(fullscreenParticipant?.callFeed);
-
-  const toggleFullscreen = useCallback(
-    (tileDes: TileDescriptor) => {
-      if (fullscreenParticipant) {
-        document.exitFullscreen();
-        setFullscreenParticipant(null);
-      } else {
-        try {
-          if (ref.current.requestFullscreen) {
-            ref.current.requestFullscreen();
-          } else if (ref.current.webkitRequestFullscreen) {
-            ref.current.webkitRequestFullscreen();
-          } else {
-            logger.error("No available fullscreen API!");
-          }
-          setFullscreenParticipant(tileDes);
-        } catch (error) {
-          console.warn("Failed to fullscreen:", error);
-        }
-      }
-    },
-    [fullscreenParticipant, setFullscreenParticipant, ref]
-  );
-
-  const onFullscreenChanged = useCallback(() => {
-    if (!document.fullscreenElement && !document.webkitFullscreenElement) {
-      setFullscreenParticipant(null);
-    }
-  }, [setFullscreenParticipant]);
-
-  useEventTarget(ref.current, "fullscreenchange", onFullscreenChanged);
-  useEventTarget(ref.current, "webkitfullscreenchange", onFullscreenChanged);
-
-  useEffect(() => {
-    if (disposed) {
-      if (document.exitFullscreen) {
-        document.exitFullscreen();
-      } else if (document.webkitExitFullscreen) {
-        document.webkitExitFullscreen();
-      } else {
-        logger.error("No available fullscreen API!");
-      }
-      setFullscreenParticipant(null);
-    }
-  }, [disposed]);
-
-  return { toggleFullscreen, fullscreenParticipant };
-}