| <!DOCTYPE html> |
| <title>Test preservesPitch.</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="pitch-detector.js"></script> |
| <script> |
| |
| // Remove when media-elements/historical.html's preservePitch prefix tests are are passing. |
| function getPreservesPitch(audio) { |
| if ("preservesPitch" in HTMLAudioElement.prototype) { |
| return audio.preservesPitch; |
| } |
| if ("mozPreservesPitch" in HTMLAudioElement.prototype) { |
| return audio.mozPreservesPitch; |
| } |
| if ("wekbitPreservesPitch" in HTMLAudioElement.prototype) { |
| return audio.wekbitPreservesPitch; |
| } |
| return undefined; |
| } |
| |
| // Remove when media-elements/historical.html's preservePitch prefix tests are are passing. |
| function setPreservesPitch(audio, value) { |
| if ("preservesPitch" in HTMLAudioElement.prototype) { |
| audio.preservesPitch = value; |
| } else if ("mozPreservesPitch" in HTMLAudioElement.prototype) { |
| audio.mozPreservesPitch = value; |
| } else if ("wekbitPreservesPitch" in HTMLAudioElement.prototype) { |
| audio.wekbitPreservesPitch = value; |
| } |
| } |
| |
| test(function(t) { |
| assert_true("preservesPitch" in HTMLAudioElement.prototype); |
| }, "Test that preservesPitch is present and unprefixed."); |
| |
| test(function(t) { |
| let audio = document.createElement('audio'); |
| assert_true(getPreservesPitch(audio)); |
| |
| setPreservesPitch(audio, false); |
| assert_false(getPreservesPitch(audio)); |
| }, "Test that presevesPitch is on by default"); |
| |
| function testPreservesPitch(preservesPitch, playbackRate, expectedPitch, description) { |
| promise_test(async t => { |
| let audio = document.createElement('audio'); |
| |
| var detector = getPitchDetector(audio, t); |
| |
| // This file contains 5 seconds of a 440hz sine wave. |
| audio.src = "/media/sine440.mp3"; |
| |
| audio.playbackRate = playbackRate; |
| setPreservesPitch(audio, preservesPitch); |
| |
| function promiseTimeUpdate() { |
| return new Promise((resolve) => audio.ontimeupdate = resolve); |
| } |
| |
| function verifyPitch() { |
| var pitch = detector(); |
| |
| // 25Hz is larger than the margin we get from 48kHz and 44.1kHz |
| // audio being analyzed by a FFT of size 2048. If we get something |
| // different, there is an error within the test's calculations (or |
| // we might be dealing a larger sample rate). |
| assert_less_than(pitch.margin, 25, |
| "Test error: the margin should be reasonably small.") |
| |
| assert_approx_equals(pitch.value, expectedPitch, pitch.margin, |
| "The actual pitch should be close to the expected pitch."); |
| } |
| |
| await test_driver.bless("Play audio element", () => audio.play() ) |
| .then(promiseTimeUpdate) |
| .then(verifyPitch); |
| }, description); |
| } |
| |
| var REFERENCE_PITCH = 440; |
| |
| testPreservesPitch(true, 1.0, REFERENCE_PITCH, |
| "The default playbackRate should not affect pitch") |
| |
| testPreservesPitch(false, 1.0, REFERENCE_PITCH, |
| "The default playbackRate should not affect pitch, even with preservesPitch=false") |
| |
| testPreservesPitch(true, 2.0, REFERENCE_PITCH, |
| "Speed-ups should not change the pitch when preservesPitch=true") |
| |
| testPreservesPitch(true, 0.5, REFERENCE_PITCH, |
| "Slow-downs should not change the pitch when preservesPitch=true") |
| |
| testPreservesPitch(false, 2.0, REFERENCE_PITCH*2.0, |
| "Speed-ups should change the pitch when preservesPitch=false") |
| |
| testPreservesPitch(false, 0.5, REFERENCE_PITCH*0.5, |
| "Slow-downs should change the pitch when preservesPitch=false") |
| |
| </script> |
