chromium/third_party/blink/web_tests/fast/mediastream/getusermedia-audio-processing.html

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<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
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promise_test(async t => {
  // Use ideal constraints to allow the browser to select any settings, but
  // verify that the requested ones are actually selected.
  let stream1 = await navigator.mediaDevices.getUserMedia({
    audio: {
      deviceId: "default",
      echoCancellation: true,
      autoGainControl: true,
      noiseSuppression: true,
    }
  });
  let track1 = stream1.getTracks()[0];
  t.add_cleanup(() => track1.stop());
  let settings1 = track1.getSettings();
  assert_equals(settings1.deviceId, "default", "settings1.deviceId");
  assert_true(settings1.echoCancellation, "settings1.echoCancellation");
  assert_true(settings1.autoGainControl, "settings1.autoGainControl");
  assert_true(settings1.noiseSuppression, "settings1.noiseSuppression");

  let stream2 = await navigator.mediaDevices.getUserMedia({
    audio: {
      deviceId: "default",
      echoCancellation: false,
      autoGainControl: false,
      noiseSuppression: false,
    }
  });
  let track2 = stream2.getTracks()[0];
  t.add_cleanup(() => track2.stop());
  let settings2 = track2.getSettings();
  assert_equals(settings2.deviceId, "default", "settings2.deviceId");
  assert_false(settings2.echoCancellation, "settings2.echoCancellation");
  assert_false(settings2.autoGainControl, "settings2.autoGainControl");
  assert_false(settings2.noiseSuppression, "settings2.noiseSuppression");

  assert_equals(track1.readyState, "live", "track1.readyState");
  assert_equals(track2.readyState, "live", "track2.readyState");
}, 'getUserMedia() allows opening a device with full processing and then with no processing simultaneously');

promise_test(async t => {
  // Use ideal constraints to allow the browser to select any settings, but
  // verify that the requested ones are actually selected.
  let stream1 = await navigator.mediaDevices.getUserMedia({
    audio: {
      deviceId: "default",
      echoCancellation: false,
      autoGainControl: false,
      noiseSuppression: false,
    }
  });
  let track1 = stream1.getTracks()[0];
  t.add_cleanup(() => track1.stop());
  let settings1 = track1.getSettings();
  assert_equals(settings1.deviceId, "default", "settings1.deviceId");
  assert_false(settings1.echoCancellation, "settings1.echoCancellation");
  assert_false(settings1.autoGainControl, "settings1.autoGainControl");
  assert_false(settings1.noiseSuppression, "settings1.noiseSuppression");

  let stream2 = await navigator.mediaDevices.getUserMedia({
    audio: {
      deviceId: "default",
      echoCancellation: true,
      autoGainControl: true,
      noiseSuppression: true,
    }
  });
  let track2 = stream2.getTracks()[0];
  t.add_cleanup(() => track2.stop());
  let settings2 = track2.getSettings();
  assert_equals(settings2.deviceId, "default", "settings2.deviceId");
  assert_true(settings2.echoCancellation, "settings2.echoCancellation");
  assert_true(settings2.autoGainControl, "settings2.autoGainControl");
  assert_true(settings2.noiseSuppression, "settings2.noiseSuppression");

  assert_equals(track1.readyState, "live", "track1.readyState");
  assert_equals(track2.readyState, "live", "track2.readyState");
}, 'getUserMedia() allows opening a device with no processing and then with full processing simultaneously');

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