/*
Returns an array (typed or not), of the passed array with removed trailing and ending
zero-valued elements
*/
function trimEmptyElements(array) {
var start = 0;
var end = array.length;
while (start < array.length) {
if (array[start] !== 0) {
break;
}
start++;
}
while (end > 0) {
end--;
if (array[end] !== 0) {
break;
}
}
return array.subarray(start, end);
}
function fuzzyCompare(a, b) {
return Math.abs(a - b) < 9e-3;
}
function compareChannels(buf1, buf2,
/*optional*/ length,
/*optional*/ sourceOffset,
/*optional*/ destOffset,
/*optional*/ skipLengthCheck) {
if (!skipLengthCheck) {
assert_equals(buf1.length, buf2.length, "Channels must have the same length");
}
sourceOffset = sourceOffset || 0;
destOffset = destOffset || 0;
if (length == undefined) {
length = buf1.length - sourceOffset;
}
var difference = 0;
var maxDifference = 0;
var firstBadIndex = -1;
for (var i = 0; i < length; ++i) {
if (!fuzzyCompare(buf1[i + sourceOffset], buf2[i + destOffset])) {
difference++;
maxDifference = Math.max(maxDifference, Math.abs(buf1[i + sourceOffset] - buf2[i + destOffset]));
if (firstBadIndex == -1) {
firstBadIndex = i;
}
}
};
assert_equals(difference, 0, "maxDifference: " + maxDifference +
", first bad index: " + firstBadIndex + " with test-data offset " +
sourceOffset + " and expected-data offset " + destOffset +
"; corresponding values " + buf1[firstBadIndex + sourceOffset] + " and " +
buf2[firstBadIndex + destOffset] + " --- differences");
}
function compareBuffers(got, expected) {
if (got.numberOfChannels != expected.numberOfChannels) {
assert_equals(got.numberOfChannels, expected.numberOfChannels,
"Correct number of buffer channels");
return;
}
if (got.length != expected.length) {
assert_equals(got.length, expected.length,
"Correct buffer length");
return;
}
if (got.sampleRate != expected.sampleRate) {
assert_equals(got.sampleRate, expected.sampleRate,
"Correct sample rate");
return;
}
for (var i = 0; i < got.numberOfChannels; ++i) {
compareChannels(got.getChannelData(i), expected.getChannelData(i),
got.length, 0, 0, true);
}
}
/**
* This function assumes that the test is a "single page test" [0], and defines a
* single gTest variable with the following properties and methods:
*
* + numberOfChannels: optional property which specifies the number of channels
* in the output. The default value is 2.
* + createGraph: mandatory method which takes a context object and does
* everything needed in order to set up the Web Audio graph.
* This function returns the node to be inspected.
* + createGraphAsync: async version of createGraph. This function takes
* a callback which should be called with an argument
* set to the node to be inspected when the callee is
* ready to proceed with the test. Either this function
* or createGraph must be provided.
* + createExpectedBuffers: optional method which takes a context object and
* returns either one expected buffer or an array of
* them, designating what is expected to be observed
* in the output. If omitted, the output is expected
* to be silence. All buffers must have the same
* length, which must be a bufferSize supported by
* ScriptProcessorNode. This function is guaranteed
* to be called before createGraph.
* + length: property equal to the total number of frames which we are waiting
* to see in the output, mandatory if createExpectedBuffers is not
* provided, in which case it must be a bufferSize supported by
* ScriptProcessorNode (256, 512, 1024, 2048, 4096, 8192, or 16384).
* If createExpectedBuffers is provided then this must be equal to
* the number of expected buffers * the expected buffer length.
*
* + skipOfflineContextTests: optional. when true, skips running tests on an offline
* context by circumventing testOnOfflineContext.
*
* [0]: https://web-platform-tests.org/writing-tests/testharness-api.html#single-page-tests
*/
function runTest(name)
{
function runTestFunction () {
if (!gTest.numberOfChannels) {
gTest.numberOfChannels = 2; // default
}
var testLength;
function runTestOnContext(context, callback, testOutput) {
if (!gTest.createExpectedBuffers) {
// Assume that the output is silence
var expectedBuffers = getEmptyBuffer(context, gTest.length);
} else {
var expectedBuffers = gTest.createExpectedBuffers(context);
}
if (!(expectedBuffers instanceof Array)) {
expectedBuffers = [expectedBuffers];
}
var expectedFrames = 0;
for (var i = 0; i < expectedBuffers.length; ++i) {
assert_equals(expectedBuffers[i].numberOfChannels, gTest.numberOfChannels,
"Correct number of channels for expected buffer " + i);
expectedFrames += expectedBuffers[i].length;
}
if (gTest.length && gTest.createExpectedBuffers) {
assert_equals(expectedFrames,
gTest.length, "Correct number of expected frames");
}
if (gTest.createGraphAsync) {
gTest.createGraphAsync(context, function(nodeToInspect) {
testOutput(nodeToInspect, expectedBuffers, callback);
});
} else {
testOutput(gTest.createGraph(context), expectedBuffers, callback);
}
}
function testOnNormalContext(callback) {
function testOutput(nodeToInspect, expectedBuffers, callback) {
testLength = 0;
var sp = context.createScriptProcessor(expectedBuffers[0].length, gTest.numberOfChannels, 1);
nodeToInspect.connect(sp).connect(context.destination);
sp.onaudioprocess = function(e) {
var expectedBuffer = expectedBuffers.shift();
testLength += expectedBuffer.length;
compareBuffers(e.inputBuffer, expectedBuffer);
if (expectedBuffers.length == 0) {
sp.onaudioprocess = null;
callback();
}
};
}
var context = new AudioContext();
runTestOnContext(context, callback, testOutput);
}
function testOnOfflineContext(callback, sampleRate) {
function testOutput(nodeToInspect, expectedBuffers, callback) {
nodeToInspect.connect(context.destination);
context.oncomplete = function(e) {
var samplesSeen = 0;
while (expectedBuffers.length) {
var expectedBuffer = expectedBuffers.shift();
assert_equals(e.renderedBuffer.numberOfChannels, expectedBuffer.numberOfChannels,
"Correct number of input buffer channels");
for (var i = 0; i < e.renderedBuffer.numberOfChannels; ++i) {
compareChannels(e.renderedBuffer.getChannelData(i),
expectedBuffer.getChannelData(i),
expectedBuffer.length,
samplesSeen,
undefined,
true);
}
samplesSeen += expectedBuffer.length;
}
callback();
};
context.startRendering();
}
var context = new OfflineAudioContext(gTest.numberOfChannels, testLength, sampleRate);
runTestOnContext(context, callback, testOutput);
}
testOnNormalContext(function() {
if (!gTest.skipOfflineContextTests) {
testOnOfflineContext(function() {
testOnOfflineContext(done, 44100);
}, 48000);
} else {
done();
}
});
};
runTestFunction();
}
// Simpler than audit.js, but still logs the message. Requires
// `setup("explicit_done": true)` if testing code that runs after the "load"
// event.
function equals(a, b, msg) {
test(function() {
assert_equals(a, b);
}, msg);
}
function is_true(a, msg) {
test(function() {
assert_true(a);
}, msg);
}
// This allows writing AudioWorkletProcessor code in the same file as the rest
// of the test, for quick one off AudioWorkletProcessor testing.
function URLFromScriptsElements(ids)
{
var scriptTexts = [];
for (let id of ids) {
const e = document.querySelector("script#"+id)
if (!e) {
throw id+" is not the id of a <script> tag";
}
scriptTexts.push(e.innerText);
}
const blob = new Blob(scriptTexts, {type: "application/javascript"});
return URL.createObjectURL(blob);
}
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