Reports initial device list and subsequent device changes to callstats.

JitsiConference.js

     this.room.addListener(XMPPEvents.SENDRECV_STREAMS_CHANGED,
         track.ssrcHandler);
 
+    // Report active device to statistics
+    var devices = RTC.getCurrentlyAvailableMediaDevices();
+    device = devices.find(function (d) {
+        return d.kind === track.getTrack().kind + 'input'
+            && d.label === track.getTrack().label;
+    });
+
+    Statistics.sendАctiveDeviceListEvent(
+        RTC.getEventDataForActiveDevice(device));
+
     return new Promise(function (resolve, reject) {
         this.room.addStream(track.getOriginalStream(), function () {
             if (track.isVideoTrack()) {

JitsiMediaDevices.js

 var RTC = require("./modules/RTC/RTC");
 var MediaType = require('./service/RTC/MediaType');
 var JitsiMediaDevicesEvents = require('./JitsiMediaDevicesEvents');
+var Statistics = require("./modules/statistics/statistics");
 
 var eventEmitter = new EventEmitter();
 
         eventEmitter.emit(JitsiMediaDevicesEvents.DEVICE_LIST_CHANGED, devices);
     });
 
+RTC.addListener(RTCEvents.DEVICE_LIST_AVAILABLE,
+    function (devices) {
+        // log output device
+        logOutputDevice(
+            JitsiMediaDevices.getAudioOutputDevice(),
+            devices);
+    });
+
+/**
+ * Gathers data and sends it to statistics.
+ * @param deviceID the device id to log
+ * @param devices list of devices
+ */
+function logOutputDevice (deviceID, devices) {
+    var device = devices.find(function (d) {
+        return d.kind === 'audiooutput' && d.deviceId === deviceID;
+    });
+
+    Statistics.sendАctiveDeviceListEvent(
+        RTC.getEventDataForActiveDevice(device));
+}
+
 var JitsiMediaDevices = {
     /**
      * Executes callback with list of media devices connected.
      *      otherwise
      */
     setAudioOutputDevice: function (deviceId) {
+
+        if (RTC.getCurrentlyAvailableMediaDevices().length > 0)
+        {
+            // if we have devices info report device to stats
+            // normally this will not happen on startup as this method is called
+            // too early. This will happen only on user selection of new device
+            logOutputDevice(deviceId, RTC.getCurrentlyAvailableMediaDevices());
+        }
+
         return RTC.setAudioOutputDevice(deviceId);
     },
     /**

modules/RTC/RTC.js

     return RTCUtils.getAudioOutputDevice();
 };
 
+/**
+ * Returns list of available media devices if its obtained, otherwise an
+ * empty array is returned/
+ * @returns {Array} list of available media devices.
+ */
+RTC.getCurrentlyAvailableMediaDevices = function () {
+    return RTCUtils.getCurrentlyAvailableMediaDevices();
+};
+
+/**
+ * Returns event data for device to be reported to stats.
+ * @returns {MediaDeviceInfo} device.
+ */
+RTC.getEventDataForActiveDevice = function (device) {
+    return RTCUtils.getEventDataForActiveDevice(device);
+};
+
 /**
  * Sets current audio output device.
  * @param {string} deviceId - id of 'audiooutput' device from

modules/RTC/RTCUtils.js

     eventEmitter.emit(RTCEvents.RTC_READY, true);
     screenObtainer.init(options, GUM);
 
-    if (isDeviceChangeEventSupported && RTCUtils.isDeviceListAvailable()) {
-        navigator.mediaDevices.addEventListener('devicechange', function () {
-            RTCUtils.enumerateDevices(onMediaDevicesListChanged);
+    if (RTCUtils.isDeviceListAvailable() && rawEnumerateDevicesWithCallback) {
+        rawEnumerateDevicesWithCallback(function (devices) {
+            currentlyAvailableMediaDevices = devices.splice(0);
+
+            eventEmitter.emit(RTCEvents.DEVICE_LIST_AVAILABLE,
+                currentlyAvailableMediaDevices);
+
+            if (isDeviceChangeEventSupported) {
+                navigator.mediaDevices.addEventListener(
+                    'devicechange',
+                    function () {
+                        RTCUtils.enumerateDevices(
+                            onMediaDevicesListChanged);
+                    });
+            } else {
+                pollForAvailableMediaDevices();
+            }
         });
-    } else if (RTCUtils.isDeviceListAvailable()) {
-        pollForAvailableMediaDevices();
     }
 }
 
      */
     getAudioOutputDevice: function () {
         return audioOutputDeviceId;
+    },
+
+    /**
+     * Returns list of available media devices if its obtained, otherwise an
+     * empty array is returned/
+     * @returns {Array} list of available media devices.
+     */
+    getCurrentlyAvailableMediaDevices: function () {
+        return currentlyAvailableMediaDevices;
+    },
+
+    /**
+     * Returns event data for device to be reported to stats.
+     * @returns {MediaDeviceInfo} device.
+     */
+    getEventDataForActiveDevice: function (device) {
+        var devices = [];
+        var deviceData = {
+            "deviceId": device.deviceId,
+            "kind":     device.kind,
+            "label":    device.label,
+            "groupId":  device.groupId
+        };
+        devices.push(deviceData);
+        return { deviceList: devices };
     }
 };
 

service/RTC/RTCEvents.js

     AVAILABLE_DEVICES_CHANGED: "rtc.available_devices_changed",
     TRACK_ATTACHED: "rtc.track_attached",
     AUDIO_OUTPUT_DEVICE_CHANGED: "rtc.audio_output_device_changed",
-    DEVICE_LIST_CHANGED: "rtc.device_list_changed"
+    DEVICE_LIST_CHANGED: "rtc.device_list_changed",
+    DEVICE_LIST_AVAILABLE: "rtc.device_list_available"
 };
 
 module.exports = RTCEvents;