in conference.js [2678:2846]
_onDeviceListChanged(devices) {
const oldDevices = APP.store.getState()['features/base/devices'].availableDevices;
const localAudio = getLocalJitsiAudioTrack(APP.store.getState());
const localVideo = getLocalJitsiVideoTrack(APP.store.getState());
APP.store.dispatch(updateDeviceList(devices));
// Firefox users can choose their preferred device in the gUM prompt. In that case
// we should respect that and not attempt to switch to the preferred device from
// our settings.
const newLabelsOnly = mediaDeviceHelper.newDeviceListAddedLabelsOnly(oldDevices, devices);
const newDevices
= mediaDeviceHelper.getNewMediaDevicesAfterDeviceListChanged(
devices,
this.isSharingScreen,
localVideo,
localAudio,
newLabelsOnly);
const promises = [];
const audioWasMuted = this.isLocalAudioMuted();
const videoWasMuted = this.isLocalVideoMuted();
const requestedInput = {
audio: Boolean(newDevices.audioinput),
video: Boolean(newDevices.videoinput)
};
if (typeof newDevices.audiooutput !== 'undefined') {
const { dispatch } = APP.store;
const setAudioOutputPromise
= setAudioOutputDeviceId(newDevices.audiooutput, dispatch)
.catch(); // Just ignore any errors in catch block.
promises.push(setAudioOutputPromise);
}
// Handles the use case when the default device is changed (we are always stopping the streams because it's
// simpler):
// If the default device is changed we need to first stop the local streams and then call GUM. Otherwise GUM
// will return a stream using the old default device.
if (requestedInput.audio && localAudio) {
localAudio.stopStream();
}
if (requestedInput.video && localVideo) {
localVideo.stopStream();
}
// Let's handle unknown/non-preferred devices
const newAvailDevices
= APP.store.getState()['features/base/devices'].availableDevices;
let newAudioDevices = [];
let oldAudioDevices = [];
if (typeof newDevices.audiooutput === 'undefined') {
newAudioDevices = newAvailDevices.audioOutput;
oldAudioDevices = oldDevices.audioOutput;
}
if (!requestedInput.audio) {
newAudioDevices = newAudioDevices.concat(newAvailDevices.audioInput);
oldAudioDevices = oldAudioDevices.concat(oldDevices.audioInput);
}
// check for audio
if (newAudioDevices.length > 0) {
APP.store.dispatch(
checkAndNotifyForNewDevice(newAudioDevices, oldAudioDevices));
}
// check for video
if (!requestedInput.video) {
APP.store.dispatch(
checkAndNotifyForNewDevice(newAvailDevices.videoInput, oldDevices.videoInput));
}
// When the 'default' mic needs to be selected, we need to
// pass the real device id to gUM instead of 'default' in order
// to get the correct MediaStreamTrack from chrome because of the
// following bug.
// https://bugs.chromium.org/p/chromium/issues/detail?id=997689
const hasDefaultMicChanged = newDevices.audioinput === 'default';
// This is the case when the local video is muted and a preferred device is connected.
if (requestedInput.video && this.isLocalVideoMuted()) {
// We want to avoid creating a new video track in order to prevent turning on the camera.
requestedInput.video = false;
APP.store.dispatch(updateSettings({ // Update the current selected camera for the device selection dialog.
cameraDeviceId: newDevices.videoinput
}));
delete newDevices.videoinput;
// Removing the current video track in order to force the unmute to select the preferred device.
logger.debug('_onDeviceListChanged: Removing the current video track.');
this.useVideoStream(null);
}
promises.push(
mediaDeviceHelper.createLocalTracksAfterDeviceListChanged(
createLocalTracksF,
newDevices.videoinput,
hasDefaultMicChanged
? getDefaultDeviceId(APP.store.getState(), 'audioInput')
: newDevices.audioinput)
.then(tracks => {
// If audio or video muted before, or we unplugged current
// device and selected new one, then mute new track.
const muteSyncPromises = tracks.map(track => {
if ((track.isVideoTrack() && videoWasMuted)
|| (track.isAudioTrack() && audioWasMuted)) {
return track.mute();
}
return Promise.resolve();
});
return Promise.all(muteSyncPromises)
.then(() =>
Promise.all(Object.keys(requestedInput).map(mediaType => {
if (requestedInput[mediaType]) {
const useStream
= mediaType === 'audio'
? this.useAudioStream.bind(this)
: this.useVideoStream.bind(this);
const track = tracks.find(t => t.getType() === mediaType) || null;
// Use the new stream or null if we failed to obtain it.
return useStream(track)
.then(() => {
if (track?.isAudioTrack() && hasDefaultMicChanged) {
// workaround for the default device to be shown as selected in the
// settings even when the real device id was passed to gUM because of
// the above mentioned chrome bug.
track._realDeviceId = track.deviceId = 'default';
}
mediaType === 'audio'
? this._updateAudioDeviceId()
: this._updateVideoDeviceId();
});
}
return Promise.resolve();
})));
})
.then(() => {
// Log and sync known mute state.
if (audioWasMuted) {
sendAnalytics(createTrackMutedEvent(
'audio',
'device list changed'));
logger.log('Audio mute: device list changed');
muteLocalAudio(true);
}
if (!this.isSharingScreen && videoWasMuted) {
sendAnalytics(createTrackMutedEvent(
'video',
'device list changed'));
logger.log('Video mute: device list changed');
muteLocalVideo(true);
}
}));
return Promise.all(promises)
.then(() => {
APP.UI.onAvailableDevicesChanged(devices);
});
},