third_party/WebKit/LayoutTests/webaudio/Gain/gain.html - Issue 2671883002: Convert GainNode tests to testharness

Unified Diff: third_party/WebKit/LayoutTests/webaudio/Gain/gain.html

Issue 2671883002: Convert GainNode tests to testharness (Closed)

Patch Set: Created 3 years, 11 months ago

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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..76773f3527924c94194b3d9df972e27d85913684 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/audio-testing.js"></script>

+<script src="../resources/audit.js"></script>

+<script src="../resources/buffer-loader.js"></script>

</head>

<body>

+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.bind(task));

hongchan 2017/02/06 17:34:28 task => task.done()

+ ;

+});

+audit.run();

</script>

</body>

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