mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-23 02:05:42 +00:00
0d460e3432
This is split from the previous changeset since if we include dom/ the file size is too large for phabricator to handle. This is an autogenerated commit to handle scripts loading mochitest harness files, in the simple case where the script src is on the same line as the tag. This was generated with https://bug1544322.bmoattachments.org/attachment.cgi?id=9058170 using the `--part 2` argument. Differential Revision: https://phabricator.services.mozilla.com/D27457 --HG-- extra : moz-landing-system : lando
184 lines
5.8 KiB
HTML
184 lines
5.8 KiB
HTML
<!DOCTYPE HTML>
|
|
<html>
|
|
<head>
|
|
<title>Test for seamless loop of HTMLAudioElements</title>
|
|
<script src="/tests/SimpleTest/SimpleTest.js"></script>
|
|
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
|
|
<script type="text/javascript" src="manifest.js"></script>
|
|
</head>
|
|
<body>
|
|
<canvas id="canvas" width="300" height="300"></canvas>
|
|
<script type="application/javascript">
|
|
/**
|
|
* This test is used to ensure every time we loop audio, the audio can loop
|
|
* seamlessly which means there won't have any silenece or noise between the
|
|
* end and the start.
|
|
*/
|
|
|
|
SimpleTest.waitForExplicitFinish();
|
|
|
|
// Set DEBUG to true to add a canvas with a little drawing of what is going
|
|
// on, and actually outputs the audio to the speakers.
|
|
var DEBUG = true;
|
|
var LOOPING_COUNT = 0;
|
|
var MAX_LOOPING_COUNT = 10;
|
|
var TONE_FREQUENCY = 440;
|
|
|
|
(async function testSeamlesslooping() {
|
|
info(`- create looping audio element -`);
|
|
let audio = createAudioElement();
|
|
|
|
info(`- start audio and analyze audio wave data to ensure looping audio without any silence or noise -`);
|
|
await playAudioAndStartAnalyzingWaveData(audio);
|
|
|
|
info(`- test seamless looping multiples times -`);
|
|
for (LOOPING_COUNT = 0; LOOPING_COUNT < MAX_LOOPING_COUNT; LOOPING_COUNT++) {
|
|
await once(audio, "seeked");
|
|
info(`- the round ${LOOPING_COUNT} of the seamless looping succeeds -`);
|
|
}
|
|
|
|
info(`- end of seamless looping test -`);
|
|
SimpleTest.finish();
|
|
})();
|
|
|
|
/**
|
|
* Test utility functions
|
|
*/
|
|
function createSrcBuffer() {
|
|
// Generate the sine in floats, then convert, for simplicity.
|
|
let channels = 1;
|
|
let sampleRate = 44100;
|
|
let buffer = new Float32Array(sampleRate * channels);
|
|
let phase = 0;
|
|
const TAU = 2 * Math.PI;
|
|
for (let i = 0; i < buffer.length; i++) {
|
|
// Adjust the gain a little so we're sure it's not going to clip. This is
|
|
// important because we're converting to 16bit integer right after, and
|
|
// clipping will clearly introduce a discontinuity that will be
|
|
// mischaracterized as a looping click.
|
|
buffer[i] = Math.sin(phase) * 0.99;
|
|
phase += TAU * TONE_FREQUENCY / 44100;
|
|
if (phase > 2 * TAU) {
|
|
phase -= TAU;
|
|
}
|
|
}
|
|
|
|
// Make a RIFF header, it's 23 bytes
|
|
let buf = new Int16Array(buffer.length + 23);
|
|
buf[0] = 0x4952;
|
|
buf[1] = 0x4646;
|
|
buf[2] = (2 * buffer.length + 15) & 0x0000ffff;
|
|
buf[3] = ((2 * buffer.length + 15) & 0xffff0000) >> 16;
|
|
buf[4] = 0x4157;
|
|
buf[5] = 0x4556;
|
|
buf[6] = 0x6d66;
|
|
buf[7] = 0x2074;
|
|
buf[8] = 0x0012;
|
|
buf[9] = 0x0000;
|
|
buf[10] = 0x0001;
|
|
buf[11] = 1;
|
|
buf[12] = 44100 & 0x0000ffff;
|
|
buf[13] = (44100 & 0xffff0000) >> 16;
|
|
buf[14] = (2 * channels * sampleRate) & 0x0000ffff;
|
|
buf[15] = ((2 * channels * sampleRate) & 0xffff0000) >> 16;
|
|
buf[16] = 0x0004;
|
|
buf[17] = 0x0010;
|
|
buf[18] = 0x0000;
|
|
buf[19] = 0x6164;
|
|
buf[20] = 0x6174;
|
|
buf[21] = (2 * buffer.length) & 0x0000ffff;
|
|
buf[22] = ((2 * buffer.length) & 0xffff0000) >> 16;
|
|
|
|
// convert to int16 and copy.
|
|
for (let i = 0; i < buffer.length; i++) {
|
|
buf[i + 23] = Math.round(buffer[i] * (1 << 15));
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
function createAudioElement() {
|
|
window.audio = document.createElement("audio");
|
|
audio.src = URL.createObjectURL(new Blob([createSrcBuffer()],
|
|
{ type: 'audio/wav' }));
|
|
audio.controls = true;
|
|
audio.loop = true;
|
|
document.body.appendChild(audio);
|
|
return audio;
|
|
}
|
|
|
|
async function playAudioAndStartAnalyzingWaveData(audio) {
|
|
createAudioWaveAnalyser(audio);
|
|
ok(await once(audio, "canplay").then(() => true, () => false),
|
|
`audio can start playing.`)
|
|
ok(await audio.play().then(() => true, () => false),
|
|
`audio started playing successfully.`);
|
|
}
|
|
|
|
function createAudioWaveAnalyser(source) {
|
|
window.ac = new AudioContext();
|
|
window.analyser = ac.createAnalyser();
|
|
analyser.frequencyBuf = new Float32Array(analyser.frequencyBinCount);
|
|
analyser.smoothingTimeConstant = 0;
|
|
analyser.fftSize = 2048; // 1024 bins
|
|
|
|
let sourceNode = ac.createMediaElementSource(source);
|
|
sourceNode.connect(analyser);
|
|
|
|
if (DEBUG) {
|
|
analyser.connect(ac.destination);
|
|
analyser.timeDomainBuf = new Float32Array(analyser.frequencyBinCount);
|
|
let cvs = document.querySelector("canvas");
|
|
analyser.c = cvs.getContext("2d");
|
|
analyser.w = cvs.width;
|
|
analyser.h = cvs.height;
|
|
}
|
|
|
|
analyser.notifyAnalysis = () => {
|
|
if (LOOPING_COUNT >= MAX_LOOPING_COUNT) {
|
|
return;
|
|
}
|
|
let {frequencyBuf} = analyser;
|
|
analyser.getFloatFrequencyData(frequencyBuf);
|
|
// Let things stabilize at the beginning. See bug 1441509.
|
|
if (LOOPING_COUNT > 1) {
|
|
analyser.doAnalysis(frequencyBuf, ac.sampleRate);
|
|
}
|
|
|
|
if (DEBUG) {
|
|
let {c, w, h, timeDomainBuf} = analyser;
|
|
c.clearRect(0, 0, w, h);
|
|
analyser.getFloatTimeDomainData(timeDomainBuf);
|
|
for (let i = 0; i < frequencyBuf.length; i++) {
|
|
c.fillRect(i, h, 1, -frequencyBuf[i] + analyser.minDecibels);
|
|
}
|
|
|
|
for (let i = 0; i < timeDomainBuf.length; i++) {
|
|
c.fillRect(i, h / 2, 1, -timeDomainBuf[i] * h / 2);
|
|
}
|
|
}
|
|
|
|
requestAnimationFrame(analyser.notifyAnalysis);
|
|
}
|
|
|
|
analyser.doAnalysis = (buf, ctxSampleRate) => {
|
|
// The size of an FFT is twice the number of bins in its output.
|
|
let fftSize = 2 * buf.length;
|
|
// first find a peak where we expect one.
|
|
let binIndexTone = 1 + Math.round(TONE_FREQUENCY * fftSize / ctxSampleRate);
|
|
ok(buf[binIndexTone] > -25,
|
|
`Could not find a peak: ${buf[binIndexTone]} db at ${TONE_FREQUENCY}Hz`);
|
|
|
|
// check that the energy some octaves higher is very low.
|
|
let binIndexOutsidePeak = 1 + Math.round(TONE_FREQUENCY * 4 * buf.length / ctxSampleRate);
|
|
ok(buf[binIndexOutsidePeak] < -110,
|
|
`Found unexpected high frequency content: ${buf[binIndexOutsidePeak]}db at ${TONE_FREQUENCY * 4}Hz`);
|
|
}
|
|
|
|
analyser.notifyAnalysis();
|
|
}
|
|
|
|
</script>
|
|
</pre>
|
|
</body>
|
|
</html>
|