chrome/test/data/webrtc/media_devices.js

   1 /**
   2  * Copyright 2014 The Chromium Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  */
   6
   7 /**
   8  * Queries for media devices on the current system using the getMediaDevices
   9  * API.
  10  *
  11  * Returns the list of devices available.
  12  */
  13 function getMediaDevices() {
  14   navigator.getMediaDevices(function(devices) {
  15     returnToTest(JSON.stringify(devices));
  16   });
  17 }
  18
  19 /**
  20  * Queries for media sources on the current system using the getSources API.
  21  *
  22  * Returns the list of sources available.
  23  */
  24 function getSources() {
  25   MediaStreamTrack.getSources(function(sources) {
  26     returnToTest(JSON.stringify(sources));
  27   });
  28 }
  29
  30 /**
  31  * Queries for video input devices on the current system using the
  32  * getSources API.
  33  *
  34  * This does not guarantee that a getUserMedia with video will succeed, as the
  35  * camera could be busy for instance.
  36  *
  37  * Returns has-video-input-device to the test if there is a webcam available,
  38  * no-video-input-devices otherwise.
  39  */
  40 function hasVideoInputDeviceOnSystem() {
  41   MediaStreamTrack.getSources(function(devices) {
  42     var hasVideoInputDevice = false;
  43     devices.forEach(function(device) {
  44       if (device.kind == 'video')
  45         hasVideoInputDevice = true;
  46     });
  47
  48     if (hasVideoInputDevice)
  49       returnToTest('has-video-input-device');
  50     else
  51       returnToTest('no-video-input-devices');
  52   });
  53 }