| Index: third_party/WebKit/LayoutTests/webaudio/Gain/gain.html
|
| diff --git a/third_party/WebKit/LayoutTests/webaudio/Gain/gain.html b/third_party/WebKit/LayoutTests/webaudio/Gain/gain.html
|
| index 0a6c2b8f568885e7a9b60158c31f58a5f6838db1..bc66ed6c431b680c4eb4d1b8eae0cda8d081dccf 100644
|
| --- a/third_party/WebKit/LayoutTests/webaudio/Gain/gain.html
|
| +++ b/third_party/WebKit/LayoutTests/webaudio/Gain/gain.html
|
| @@ -8,77 +8,105 @@ The 11th note will be of gain 0.0, so it should be silent (at the end in the ren
|
|
|
| <html>
|
| <head>
|
| +<script src="../../resources/testharness.js"></script>
|
| +<script src="../../resources/testharnessreport.js"></script>
|
| <script src="../resources/audit-util.js"></script>
|
| -<script src="../resources/audio-testing.js"></script>
|
| -
|
| +<script src="../resources/audit.js"></script>
|
| +<script src="../resources/buffer-loader.js"></script>
|
| </head>
|
| <body>
|
|
|
| <script>
|
| +let audit = Audit.createTaskRunner();
|
|
|
| -window.onload = init;
|
| -
|
| -var sampleRate = 44100.0;
|
| -var bufferDurationSeconds = 0.125;
|
| -var numberOfNotes = 11;
|
| -var noteSpacing = bufferDurationSeconds + 0.020; // leave 20ms of silence between each "note"
|
| -var lengthInSeconds = numberOfNotes * noteSpacing;
|
| +let sampleRate = 44100.0;
|
| +let bufferDurationSeconds = 0.125;
|
| +let numberOfNotes = 11;
|
| +let noteSpacing =
|
| + bufferDurationSeconds + 0.020; // leave 20ms of silence between each "note"
|
| +let lengthInSeconds = numberOfNotes * noteSpacing;
|
|
|
| -var context = 0;
|
| -var sinWaveBuffer = 0;
|
| +let context = 0;
|
| +let sinWaveBuffer = 0;
|
| +let reference = 0;
|
|
|
| function createSinWaveBuffer(lengthInSeconds, frequency) {
|
| - var audioBuffer = context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate);
|
| + let audioBuffer =
|
| + context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate);
|
|
|
| - var n = audioBuffer.length;
|
| - var channelL = audioBuffer.getChannelData(0);
|
| - var channelR = audioBuffer.getChannelData(1);
|
| + let n = audioBuffer.length;
|
| + let channelL = audioBuffer.getChannelData(0);
|
| + let channelR = audioBuffer.getChannelData(1);
|
|
|
| - for (var i = 0; i < n; ++i) {
|
| - channelL[i] = Math.sin(frequency * 2.0*Math.PI * i / sampleRate);
|
| - channelR[i] = channelL[i];
|
| - }
|
| + for (let i = 0; i < n; ++i) {
|
| + channelL[i] = Math.sin(frequency * 2.0 * Math.PI * i / sampleRate);
|
| + channelR[i] = channelL[i];
|
| + }
|
|
|
| - return audioBuffer;
|
| + return audioBuffer;
|
| }
|
|
|
| function playNote(time, gain) {
|
| - var source = context.createBufferSource();
|
| - source.buffer = sinWaveBuffer;
|
| -
|
| - var gainNode = context.createGain();
|
| - gainNode.gain.value = gain;
|
| -
|
| - source.connect(gainNode);
|
| - gainNode.connect(context.destination);
|
| -
|
| - source.start(time);
|
| -}
|
| -
|
| -function init() {
|
| - if (!window.testRunner)
|
| - return;
|
| -
|
| - // Create offline audio context.
|
| - context = new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRate);
|
| -
|
| - // Create a buffer for a short "note".
|
| - sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0);
|
| + let source = context.createBufferSource();
|
| + source.buffer = sinWaveBuffer;
|
|
|
| - // Render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1.
|
| - // The last note will be of gain 0.0, so shouldn't be perceptible in the rendered output.
|
| - for (var i = 0; i < numberOfNotes; ++i) {
|
| - var time = i * noteSpacing;
|
| - var gain = 1.0 - i / (numberOfNotes - 1);
|
| - playNote(time, gain);
|
| - }
|
| + let gainNode = context.createGain();
|
| + gainNode.gain.value = gain;
|
|
|
| - context.oncomplete = finishAudioTest;
|
| - context.startRendering();
|
| + source.connect(gainNode);
|
| + gainNode.connect(context.destination);
|
|
|
| - testRunner.waitUntilDone();
|
| + source.start(time);
|
| }
|
|
|
| +audit.define('create context', function(task, should) {
|
| + task.describe('Create context for test');
|
| + // Create offline audio context.
|
| + context =
|
| + new OfflineAudioContext(2, sampleRate * lengthInSeconds, sampleRate);
|
| + task.done();
|
| +});
|
| +
|
| +audit.define('load-ref', function(task, should) {
|
| + task.describe('Load reference audio file');
|
| + let bufferLoader =
|
| + new BufferLoader(context, ['gain-expected.wav'], bufferList => {
|
| + reference = bufferList[0].getChannelData(0);
|
| + task.done();
|
| + });
|
| +
|
| + bufferLoader.load();
|
| +});
|
| +
|
| +audit.define('test', function(task, should) {
|
| + task.describe('GainNode functionality');
|
| +
|
| + // Create a buffer for a short "note".
|
| + sinWaveBuffer = createSinWaveBuffer(bufferDurationSeconds, 880.0);
|
| +
|
| + // Render 11 notes, starting at a gain of 1.0, decreasing in gain by 0.1.
|
| + // The last note will be of gain 0.0, so shouldn't be perceptible in the
|
| + // rendered output.
|
| + for (let i = 0; i < numberOfNotes; ++i) {
|
| + let time = i * noteSpacing;
|
| + let gain = 1.0 - i / (numberOfNotes - 1);
|
| + playNote(time, gain);
|
| + }
|
| +
|
| + context.startRendering()
|
| + .then(buffer => {
|
| + let actual = buffer.getChannelData(0);
|
| + should(actual, 'Output from gain node').beCloseToArray(reference, {
|
| + absoluteThreshold: 3.0503e-5
|
| + });
|
| + let snr = 10 * Math.log10(computeSNR(actual, reference));
|
| + should(snr, 'SNR (in dB)').beGreaterThanOrEqualTo(89.088);
|
| + })
|
| + .then(() => task.done());
|
| + ;
|
| +});
|
| +
|
| +audit.run();
|
| </script>
|
|
|
| </body>
|
|
|
Chromium Code Reviews
Issue 2671883002:
Convert GainNode tests to testharness (Closed)
