third_party/WebKit/LayoutTests/webaudio/iirfilter-getFrequencyResponse.html - Issue 2581463002: Refactor WebAudio test directory

Unified Diff: third_party/WebKit/LayoutTests/webaudio/iirfilter-getFrequencyResponse.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/iirfilter-getFrequencyResponse.html

diff --git a/third_party/WebKit/LayoutTests/webaudio/iirfilter-getFrequencyResponse.html b/third_party/WebKit/LayoutTests/webaudio/iirfilter-getFrequencyResponse.html

deleted file mode 100644

index 8f1247f9c62228001a714619d35692268befdd83..0000000000000000000000000000000000000000

--- a/third_party/WebKit/LayoutTests/webaudio/iirfilter-getFrequencyResponse.html

+++ /dev/null

@@ -1,133 +0,0 @@

-<!doctype html>

-<html>

- <head>

- <title>Test IIRFilter getFrequencyResponse() functionality</title>

- <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>

- <script src="resources/biquad-filters.js"></script>

- </head>

- <body>

- <script>

- description("Test IIRFilter getFrequencyResponse() functionality");

- window.jsTestIsAsync = true;

- var sampleRate = 48000;

- // Some short duration; we're not actually looking at the rendered output.

- var testDurationSec = 0.01;

- // Number of frequency samples to take.

- var numberOfFrequencies = 1000;

- var audit = Audit.createTaskRunner();

- // Compute a set of linearly spaced frequencies.

- function createFrequencies(nFrequencies, sampleRate)

- {

- var frequencies = new Float32Array(nFrequencies);

- var nyquist = sampleRate / 2;

- var freqDelta = nyquist / nFrequencies;

- for (var k = 0; k < nFrequencies; ++k) {

- frequencies[k] = k * freqDelta;

- }

- return frequencies;

- }

- audit.defineTask("1-pole IIR", function (done) {

- var context = new OfflineAudioContext(1, testDurationSec * sampleRate, sampleRate);

- var iir = context.createIIRFilter([1], [1, -0.9]);

- var frequencies = createFrequencies(numberOfFrequencies, context.sampleRate);

- var iirMag = new Float32Array(numberOfFrequencies);

- var iirPhase = new Float32Array(numberOfFrequencies);

- var trueMag = new Float32Array(numberOfFrequencies);

- var truePhase = new Float32Array(numberOfFrequencies);

- // The IIR filter is

- // H(z) = 1/(1 - 0.9*z^(-1)).

- //

- // The frequency response is

- // H(exp(j*w)) = 1/(1 - 0.9*exp(-j*w)).

- //

- // Thus, the magnitude is

- // |H(exp(j*w))| = 1/sqrt(1.81-1.8*cos(w)).

- //

- // The phase is

- // arg(H(exp(j*w)) = atan(0.9*sin(w)/(.9*cos(w)-1))

- var frequencyScale = Math.PI / (sampleRate / 2);

- for (var k = 0; k < frequencies.length; ++k) {

- var omega = frequencyScale * frequencies[k];

- trueMag[k] = 1/Math.sqrt(1.81-1.8*Math.cos(omega));

- truePhase[k] = Math.atan(0.9 * Math.sin(omega) / (0.9 * Math.cos(omega) - 1));

- }

- iir.getFrequencyResponse(frequencies, iirMag, iirPhase);

- var success = true;

- // Thresholds were experimentally determined.

- success = Should("1-pole IIR Magnitude Response", iirMag).beCloseToArray(trueMag, 2.8611e-6);

- success = Should("1-pole IIR Phase Response", iirPhase).beCloseToArray(truePhase, 1.7882e-7)

- && success;

- if (success)

- testPassed("1-pole IIR response matched expected response.\n");

- else

- testFailed("1-pole IIR response did not match expected response.\n");

- done();

- });

- audit.defineTask("compare IIR and biquad", function(done) {

- // Create an IIR filter equivalent to the biquad filter. Compute the frequency response for

- // both and verify that they are the same.

- var context = new OfflineAudioContext(1, testDurationSec * sampleRate, sampleRate);

- var biquad = context.createBiquadFilter();

- var coef = createFilter(biquad.type,

- biquad.frequency.value / (context.sampleRate / 2),

- biquad.Q.value,

- biquad.gain.value);

- var iir = context.createIIRFilter([coef.b0, coef.b1, coef.b2], [1, coef.a1, coef.a2]);

- var frequencies = createFrequencies(numberOfFrequencies, context.sampleRate);

- var biquadMag = new Float32Array(numberOfFrequencies);

- var biquadPhase = new Float32Array(numberOfFrequencies);

- var iirMag = new Float32Array(numberOfFrequencies);

- var iirPhase = new Float32Array(numberOfFrequencies);

- biquad.getFrequencyResponse(frequencies, biquadMag, biquadPhase);

- iir.getFrequencyResponse(frequencies, iirMag, iirPhase);

- var success = true;

- // Thresholds were experimentally determined.

- success = Should("IIR Magnitude Response", iirMag).beCloseToArray(biquadMag, 2.7419e-5);

- success = Should("IIR Phase Response", iirPhase).beCloseToArray(biquadPhase, 2.7657e-5) && success;

- if (success)

- testPassed("IIR response matched equivalent " + biquad.type + " Biquad response.\n");

- else

- testFailed("IIR response did not equivalent " + biquad.type + " Biquad response.\n");

- done();

- });

- audit.defineTask("finish", function (done) {

- finishJSTest();

- done();

- });

- audit.runTasks();

- successfullyParsed = true;

- </script>

- </body>

-</html>