1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142
  143
  144
  145
  146
  147
  148


content / test / data / media / video_capture_test.js [blame]

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

$ = function(id) {
  return document.getElementById(id);
};

var hasReceivedTrackEndedEvent = false;
var hasReceivedDeviceChangeEventReceived = false;

async function startVideoCaptureAndVerifySize(video_width, video_height) {
  console.log('Calling getUserMediaAndWaitForVideoRendering.');
  var constraints = {
    video: {
      width: {exact: video_width},
      height: {exact: video_height},
    }
  };
  let stream;
  try {
    stream = await navigator.mediaDevices.getUserMedia(constraints);
  } catch (err) {
    throw getUserMediaError(err);
  }
  return waitForVideoStreamToSatisfyRequirementFunction(
      stream, detectVideoWithDimensionPlaying, video_width, video_height);
}

async function startVideoCaptureFromVirtualDeviceAndVerifyUniformColorVideoWithSize(
    video_width, video_height) {
  console.log('Trying to find device named "Virtual Device".');
  const devices = await navigator.mediaDevices.enumerateDevices();
  var target_device;
  devices.forEach(function(device) {
    if (device.kind == 'videoinput') {
      console.log('Found videoinput device with label ' + device.label);
      if (device.label == 'Virtual Device') {
        target_device = device;
      }
    }
  });
  if (target_device == null) {
    throw new Error(
        'No video input device was found with label = Virtual ' +
        'Device');
  }
  var device_specific_constraints = {
    video: {
      width: {exact: video_width},
      height: {exact: video_height},
      deviceId: {exact: target_device.deviceId}
    }
  };
  let stream;
  try {
    stream =
      await navigator.mediaDevices.getUserMedia(device_specific_constraints);
  } catch (err) {
    throw getUserMediaError(err);
  }
  return waitForVideoStreamToSatisfyRequirementFunction(
            stream, detectUniformColorVideoWithDimensionPlaying, video_width,
            video_height);
}

function enumerateVideoCaptureDevicesAndVerifyCount(expected_count) {
  console.log('Enumerating devices and verifying count.');
  return navigator.mediaDevices.enumerateDevices().then(function(devices) {
    var actual_count = 0;
    devices.forEach(function(device) {
      if (device.kind == 'videoinput') {
        console.log('Found videoinput device with label ' + device.label);
        actual_count = actual_count + 1;
      }
    });
    if (actual_count == expected_count) {
      return logSuccess();
    } else {
      throw new Error(
          'Device count ' + actual_count + ' did not match expectation of ' +
          expected_count);
    }
  });
}

function getUserMediaError(error) {
  return new Error('GetUserMedia call failed with code ' + error.code);
}

async function waitForVideoStreamToSatisfyRequirementFunction(
    stream, requirementFunction, video_width, video_height) {
  var localView = $('local-view');
  localView.width = video_width;
  localView.height = video_height;
  localView.srcObject = stream;

  var canvas = $('local-view-canvas');
  canvas.width = video_width;
  canvas.height = video_height;

  var videoTracks = stream.getVideoTracks();
  if (videoTracks.length == 0) {
    throw new Error('Did not receive any video tracks');
  }
  var videoTrack = videoTracks[0];
  videoTrack.onended = function() {
    hasReceivedTrackEndedEvent = true;
  };

  await requirementFunction('local-view', video_width, video_height);
  if (localView.videoWidth == video_width) {
    return logSuccess();
  } else {
    throw new Error('Video has unexpected width.');
  }
}

async function waitForVideoToTurnBlack() {
  await detectBlackVideo('local-view');
  return logSuccess();
}

function verifyHasReceivedTrackEndedEvent() {
  if (hasReceivedTrackEndedEvent) {
    return logSuccess();
  } else {
    throw new Error('Did not receive ended event from track.');
  }
}

function registerForDeviceChangeEvent() {
  navigator.mediaDevices.ondevicechange = function(event) {
    hasReceivedDeviceChangeEventReceived = true;
  };
}

async function waitForDeviceChangeEvent() {
  while (!hasReceivedDeviceChangeEventReceived) {
    console.log('still waiting for device change event');
    await new Promise(resolve => setTimeout(resolve, 200));
  }
  return logSuccess();
}

function resetHasReceivedChangedEventFlag() {
  hasReceivedDeviceChangeEventReceived = false;
}