function finish() {
finished++;
if (finished == 2) {
SimpleTest.finish();
}
}
function setOrCompareRenderedBuffer(aRenderedBuffer) {
if (renderedBuffer) {
is(renderedBuffer, aRenderedBuffer, "Rendered buffers from the event and the promise should be the same");
finish();
} else {
renderedBuffer = aRenderedBuffer;
}
}
SimpleTest.waitForExplicitFinish();
addLoadEvent(function() {
let ctxs = [
new OfflineAudioContext(2, 100, 22050),
new OfflineAudioContext({length: 100, sampleRate: 22050}),
new OfflineAudioContext({channels: 2, length: 100, sampleRate: 22050}),
];
for (let ctx of ctxs) {
ok(ctx instanceof EventTarget, "OfflineAudioContexts must be EventTargets");
is(ctx.length, 100, "OfflineAudioContext.length is equal to the value passed to the ctor.");
var buf = ctx.createBuffer(2, 100, ctx.sampleRate);
for (var i = 0; i < 2; ++i) {
for (var j = 0; j < 100; ++j) {
buf.getChannelData(i)[j] = Math.sin(2 * Math.PI * 200 * j / ctx.sampleRate);
}
}
}
is(ctxs[1].destination.channelCount, 1, "OfflineAudioContext defaults to to correct channelCount.");
let ctx = ctxs[0];
expectException(function() {
new OfflineAudioContext(2, 100, 0);
}, DOMException.NOT_SUPPORTED_ERR);
expectException(function() {
new OfflineAudioContext(2, 100, -1);
}, DOMException.NOT_SUPPORTED_ERR);
expectException(function() {
new OfflineAudioContext(0, 100, 44100);
}, DOMException.NOT_SUPPORTED_ERR);
new OfflineAudioContext(32, 100, 44100);
expectException(function() {
new OfflineAudioContext(33, 100, 44100);
}, DOMException.NOT_SUPPORTED_ERR);
expectException(function() {
new OfflineAudioContext(2, 0, 44100);
}, DOMException.NOT_SUPPORTED_ERR);
expectTypeError(function() {
new OfflineAudioContext({});
});
expectTypeError(function() {
new OfflineAudioContext({sampleRate: 44100});
});
expectTypeError(function() {
new OfflineAudioContext({length: 44100*40});
});
var src = ctx.createBufferSource();
src.buffer = buf;
src.start(0);
src.connect(ctx.destination);
ctx.addEventListener("complete", function(e) {
ok(e instanceof OfflineAudioCompletionEvent, "Correct event received");
is(e.renderedBuffer.numberOfChannels, 2, "Correct expected number of buffers");
ok(renderedBuffer != null, "The event should be fired after the promise callback.");
expectNoException(function() {
ctx.startRendering().then(function() {
ok(false, "Promise should not resolve when startRendering is called a second time on an OfflineAudioContext")
finish();
}).catch(function() {
ok(true, "Promise should reject when startRendering is called a second time on an OfflineAudioContext")
finish();
});
});
compareBuffers(e.renderedBuffer, buf);
setOrCompareRenderedBuffer(e.renderedBuffer);
});
expectNoException(function() {
ctx.startRendering().then(function(b) {
is(renderedBuffer, null, "The promise callback should be called first.");
setOrCompareRenderedBuffer(b);
}).catch(function () {
ok(false, "The promise from OfflineAudioContext.startRendering should never be rejected");
});
});
});
</script>
</pre>
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