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Unified Diff: third_party/WebKit/LayoutTests/webaudio/osc-negative-freq.html

Issue 2581463002: Refactor WebAudio test directory (Closed)
Patch Set: Use correct path for wav result files Created 4 years ago
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Index: third_party/WebKit/LayoutTests/webaudio/osc-negative-freq.html
diff --git a/third_party/WebKit/LayoutTests/webaudio/osc-negative-freq.html b/third_party/WebKit/LayoutTests/webaudio/osc-negative-freq.html
deleted file mode 100644
index 092dea75d25f9b4be3d9a69fd50b3ee2f3494e49..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/webaudio/osc-negative-freq.html
+++ /dev/null
@@ -1,200 +0,0 @@
-<!doctype html>
-<html>
- <head>
- <script src="../resources/js-test.js"></script>
- <script src="resources/compatibility.js"></script>
- <script src="resources/audit-util.js"></script>
- <script src="resources/audio-testing.js"></script>
- <title>Test OscillatorNode with Negative Frequency</title>
- </head>
-
- <body>
- <script>
- description("Test OscillatorNode with Negative Frequency.");
- window.jsTestIsAsync = true;
-
- // Some arbitrary sample rate for the offline context.
- var sampleRate = 48000;
- var renderDuration = 1;
- var renderFrames = renderDuration * sampleRate;
-
- var audit = Audit.createTaskRunner();
-
- audit.defineTask("sine", function (done) {
- runTest({
- message: "Sum of positive and negative frequency sine oscillators",
- type: "sine",
- threshold: 4.7684e-7
- }).then(done);
- });
-
- audit.defineTask("square", function (done) {
- runTest({
- message: "Sum of positive and negative frequency square oscillators",
- type: "square",
- threshold: 4.4108e-6
- }).then(done);
- });
-
- audit.defineTask("sawtooth", function (done) {
- runTest({
- message: "Sum of positive and negative frequency sawtooth oscillators",
- type: "sawtooth",
- threshold: 4.3735e-6
- }).then(done);
- });
-
- audit.defineTask("triangle", function (done) {
- runTest({
- message: "Sum of positive and negative frequency triangle oscillators",
- type: "triangle",
- threshold: 3.5763e-7
- }).then(done);
- });
-
- audit.defineTask("auto-sawtooth", function (done) {
- runTest({
- message: "Sum of positive and negative frequency-ramped sawtooth oscillators",
- type: "sawtooth",
- automation: {
- type: "linearRampToValueAtTime",
- startTime: 0,
- endTime: renderDuration / 2,
- startFrequency: 440,
- endFrequency: sampleRate / 4
- },
- threshold: 4.1202e-6
- }).then(done);
- });
-
- audit.defineTask("periodic-wave", function (done) {
- // Test negative frequencies for a custom oscillator. Two channels are
- // needed for the context; one for the expected result, and one for the
- // actual, as explained below.
- var context = new OfflineAudioContext(2, renderFrames, sampleRate);
-
- var oscPositive = context.createOscillator();
- var oscNegative = context.createOscillator();
-
- // The Fourier coefficients for our custom oscillator. The actual values
- // not important. The waveform for our custom oscillator is
- //
- // x(t) = sum(real[k]*cos(2*%pi*f*k/Fs), k, 1)
- // + sum(imag[k]*sin(2*%pi*f*k/Fs), k, 0)
- //
- // With a negative frequency we have
- //
- // x(t) = sum(real[k]*cos(2*%pi*(-f)*k/Fs), k, 1)
- // + sum(imag[k]*sin(2*%pi*(-f)*k/Fs), k, 0)
- //
- // = sum(real[k]*cos(2*%pi*f*k/Fs), k, 1)
- // + sum((-imag[k])*sin(2*%pi*f*k/Fs), k, 0)
- //
- // That is, when the frequency is inverted, it behaves as if the
- // coefficients of the imaginary part are inverted.
- //
- // Thus, the test is to create two custom oscillators. The second
- // osillator uses the same PeriodicWave as the first except the
- // imaginary coefficients are inverted. This second oscillator also
- // gets a negative frequency. The combination of the two results in an
- // oscillator that is the same as the first with gain of 2.
- var real = [0, 1, 1];
- var imag = [0, 1, 1];
-
- var wavePositive = context.createPeriodicWave(
- Float32Array.from(real),
- Float32Array.from(imag));
- var waveNegative = context.createPeriodicWave(
- Float32Array.from(real),
- Float32Array.from(imag.map(x => -x)));
-
- oscPositive.setPeriodicWave(wavePositive);
- oscNegative.setPeriodicWave(waveNegative);
-
- oscPositive.frequency.value = 440;
- oscNegative.frequency.value = -oscPositive.frequency.value;
-
- var merger = context.createChannelMerger(2);
- var gain = context.createGain();
-
- // As explained above, the expected result should be positive frequency
- // oscillator but with a gain of 2.
- gain.gain.value = 2;
- oscPositive.connect(gain);
- gain.connect(merger, 0, 0);
-
- // Sum the positive and negative frequency oscillators by using the same
- // input to the merger.
- oscPositive.connect(merger, 0, 1);
- oscNegative.connect(merger, 0, 1);
-
- merger.connect(context.destination);
-
- oscPositive.start();
- oscNegative.start();
-
- context.startRendering().then(function (buffer) {
- var expected = buffer.getChannelData(0);
- var actual = buffer.getChannelData(1);
-
- Should("Sum of positive and negative frequency custom oscillators",
- actual, {
- precision: 6
- })
- .beCloseToArray(expected, 4.7684e-7);
- }).then(done);
- });
-
-
- // All done!
- audit.defineTask("finish", function (done) {
- finishJSTest();
- done();
- });
-
- audit.runTasks();
-
- function runTest(options) {
- // To test if negative frequencies work, create two oscillators. One
- // has a positive frequency and the other has a negative frequency.
- // Sum the oscillator outputs; the output should be zero because all of
- // the builtin oscillator types are odd functions of frequency.
- var context = new OfflineAudioContext(1, renderFrames, sampleRate);
-
- var oscPositive = context.createOscillator();
- var oscNegative = context.createOscillator();
-
- oscPositive.type = options.type;
- oscNegative.type = oscPositive.type;
-
- if (options.automation) {
- var {type, startTime, endTime, startFrequency, endFrequency} = options.automation;
- oscPositive.frequency.setValueAtTime(startFrequency, startTime);
- oscPositive.frequency[type](endFrequency, endTime)
-
- oscNegative.frequency.setValueAtTime(-startFrequency, startTime);
- oscNegative.frequency[type](-endFrequency, endTime)
- } else {
- oscPositive.frequency.value = 440;
- oscNegative.frequency.value = -oscPositive.frequency.value;
- }
-
- oscPositive.connect(context.destination);
- oscNegative.connect(context.destination);
-
- oscPositive.start();
- oscNegative.start();
-
- return context.startRendering().then(function (buffer) {
- var result = buffer.getChannelData(0);
-
- var zero = new Float32Array(result.length);
- zero.fill(0);
- Should(options.message, result, {
- verbose: true
- }).beCloseToArray(zero, options.threshold || 0);
- });
- }
- </script>
- </body>
-</html>
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