| Index: third_party/WebKit/LayoutTests/webaudio/osc-low-freq.html
|
| diff --git a/third_party/WebKit/LayoutTests/webaudio/osc-low-freq.html b/third_party/WebKit/LayoutTests/webaudio/osc-low-freq.html
|
| deleted file mode 100644
|
| index 0218e70706c163e94c526df1647707f14f5ff61a..0000000000000000000000000000000000000000
|
| --- a/third_party/WebKit/LayoutTests/webaudio/osc-low-freq.html
|
| +++ /dev/null
|
| @@ -1,90 +0,0 @@
|
| -<!doctype html>
|
| -<html>
|
| - <head>
|
| - <title>Test Custom Oscillator at Very Low Frequency</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>
|
| - </head>
|
| -
|
| - <body>
|
| - <script>
|
| - description("Test Custom Oscillator at Very Low Frequency");
|
| - window.jsTestIsAsync = true;
|
| -
|
| - // Create a custom oscillator and verify that the parts of a periodic wave that should be
|
| - // ignored really are ignored.
|
| -
|
| - var sampleRate = 48000;
|
| -
|
| - // The desired frequency of the oscillator. The value to be used depends on the
|
| - // implementation of the PeriodicWave and should be less than then lowest fundamental
|
| - // frequency. The lowest frequency is the Nyquist frequency divided by the max number of
|
| - // coefficients used for the FFT. In the current implementation, the max number of
|
| - // coefficients is 2048 (for a sample rate of 48 kHz) so the lowest frequency is 24000/2048 =
|
| - // 11.78 Hz.
|
| - var desiredFrequencyHz = 1;
|
| -
|
| - // Minimum allowed SNR between the actual oscillator and the expected result. Experimentally
|
| - // determined.
|
| - var snrThreshold = 130;
|
| -
|
| - var context;
|
| - var osc;
|
| - var actual;
|
| -
|
| - var audit = Audit.createTaskRunner();
|
| -
|
| - // Compute the SNR between the actual result and expected cosine wave
|
| - function checkCosineResult(result, freq, sampleRate) {
|
| - var signal = 0;
|
| - var noise = 0;
|
| - var omega = 2 * Math.PI * freq / sampleRate;
|
| -
|
| - actual = result.getChannelData(0);
|
| -
|
| - for (var k = 0; k < actual.length; ++k) {
|
| - var x = Math.cos(omega * k);
|
| - var diff = x - actual[k];
|
| - signal += x * x;
|
| - noise += diff * diff;
|
| - }
|
| -
|
| - var snr = 10 * Math.log10(signal / noise);
|
| -
|
| - Should("SNR of " + desiredFrequencyHz + " Hz sine wave", snr, {
|
| - brief: true
|
| - }).beGreaterThanOrEqualTo(snrThreshold);
|
| - testPassed("PeriodicWave coefficients that must be ignored were correctly ignored.");
|
| - }
|
| -
|
| - function runTest() {
|
| - context = new OfflineAudioContext(1, sampleRate, sampleRate);
|
| - osc = context.createOscillator();
|
| -
|
| - // Create the custom oscillator. For simplicity of testing, we use just a cosine wave, but
|
| - // the initial elements of the real and imaginary parts are explicitly set to non-zero to
|
| - // test that they are ignored.
|
| - var r = new Float32Array(2);
|
| - var i = new Float32Array(2);
|
| - r[0] = 1; // DC component to be ignored
|
| - r[1] = 1; // Fundamental
|
| - i[0] = 1; // Sine term that doesn't actually exist in a Fourier series
|
| - i[1] = 0;
|
| - var wave = context.createPeriodicWave(r, i);
|
| -
|
| - osc.setPeriodicWave(wave);
|
| - osc.frequency.value = desiredFrequencyHz;
|
| - osc.connect(context.destination);
|
| - osc.start();
|
| - context.startRendering().then(function (buffer) {
|
| - checkCosineResult(buffer, desiredFrequencyHz, sampleRate);
|
| - }).then(finishJSTest);
|
| - };
|
| -
|
| - runTest();
|
| - successfullyParsed = true;
|
| - </script>
|
| - </body>
|
| -</html>
|
|
|
Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
