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Bug 1436096 - In PannerNode mochitest correct mono input and add test for stereo input. r=padenot

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MozReview-Commit-ID: KEdtm85lzlx

--HG--
extra : rebase_source : 271fd8af10e81dbf1ac3711788b4c28fcc03b414
This commit is contained in:
Alex Chronopoulos 2018-03-02 21:06:58 +02:00
parent a0b3530e01
commit 6a19b2f4cf
1 changed files with 65 additions and 2 deletions
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67
dom/media/webaudio/test/test_pannerNodeAtZeroDistance.html
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@ -17,7 +17,7 @@ var types = [
"HRTF"
]
var finished = types.length;
var finished = 2 * types.length;
function finish() {
if (!--finished) {
@ -25,7 +25,7 @@ function finish() {
}
}
function test(type) {
function testMono(type) {
var ac = new OfflineAudioContext(1, BUF_SIZE, 44100);
// A sine to be used to fill the buffers
@ -68,12 +68,75 @@ function test(type) {
panner3.connect(ac.destination);
// Use the input buffer to compare the output. According to the spec,
// mono input at zero distance will apply gain = cos(0.5 * Math.PI / 2)
// https://webaudio.github.io/web-audio-api/#Spatialzation-equal-power-panning
const gain = Math.cos(0.5 * Math.PI / 2);
for (var i = 0; i < BUF_SIZE; ++i) {
monoBuffer.getChannelData(0)[i] = gain * monoBuffer.getChannelData(0)[i];
}
ac.startRendering().then(function(buffer) {
compareBuffers(buffer, monoBuffer);
finish();
});
}
function testStereo(type) {
var ac = new OfflineAudioContext(2, BUF_SIZE, 44100);
// A sine to be used to fill the buffers
function sine(t) {
return Math.sin(440 * 2 * Math.PI * t / ac.sampleRate);
}
var stereoBuffer = ac.createBuffer(2, BUF_SIZE, ac.sampleRate);
for (var i = 0; i < BUF_SIZE; ++i) {
stereoBuffer.getChannelData(0)[i] = sine(i);
stereoBuffer.getChannelData(1)[i] = sine(i);
}
var stereoSource = ac.createBufferSource();
stereoSource.buffer = stereoBuffer;
stereoSource.start(0);
var panner = ac.createPanner();
panner.distanceModel = "linear";
panner.refDistance = 1;
panner.positionX.value = 0;
panner.positionY.value = 0;
panner.positionZ.value = 0;
stereoSource.connect(panner);
var panner2 = ac.createPanner();
panner2.distanceModel = "inverse";
panner2.refDistance = 1;
panner2.positionX.value = 0;
panner2.positionY.value = 0;
panner2.positionZ.value = 0;
panner.connect(panner2);
var panner3 = ac.createPanner();
panner3.distanceModel = "exponential";
panner3.refDistance = 1;
panner3.positionX.value = 0;
panner3.positionY.value = 0;
panner3.positionZ.value = 0;
panner2.connect(panner3);
panner3.connect(ac.destination);
ac.startRendering().then(function(buffer) {
compareBuffers(buffer, stereoBuffer);
finish();
});
}
function test(type) {
testMono(type);
testStereo(type);
}
addLoadEvent(function() {
types.forEach(test);
});