| Index: third_party/WebKit/LayoutTests/webaudio/audioparam-automation-clamping.html
|
| diff --git a/third_party/WebKit/LayoutTests/webaudio/audioparam-automation-clamping.html b/third_party/WebKit/LayoutTests/webaudio/audioparam-automation-clamping.html
|
| deleted file mode 100644
|
| index e994fb2dcc3e2001c4a149a9632aed991a370578..0000000000000000000000000000000000000000
|
| --- a/third_party/WebKit/LayoutTests/webaudio/audioparam-automation-clamping.html
|
| +++ /dev/null
|
| @@ -1,133 +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 Clamping of Automations</title>
|
| - </head>
|
| -
|
| - <body>
|
| - <script>
|
| - description("Test Clamping of Automations.");
|
| - window.jsTestIsAsync = true;
|
| -
|
| - // Some arbitrary sample rate for the offline context.
|
| - var sampleRate = 48000;
|
| -
|
| - // Duration of test (fairly arbitrary).
|
| - var renderDuration = 1;
|
| - var renderFrames = renderDuration * sampleRate;
|
| -
|
| - var audit = Audit.createTaskRunner();
|
| -
|
| - audit.defineTask("clamp", function (done) {
|
| - // Test clamping of automations. Most AudioParam limits are essentially
|
| - // unbounded, so clamping doesn't happen. For most other AudioParams,
|
| - // the behavior is sufficiently complicated with complicated outputs
|
| - // that testing them is hard. However the output behavior of the
|
| - // frequency parameter for a BiquadFilter is relatively simple. Use
|
| - // that as the test.
|
| - var context = new OfflineAudioContext(1, renderFrames, sampleRate);
|
| -
|
| - var source = context.createBufferSource();
|
| - source.buffer = createConstantBuffer(context, 1, 1);
|
| - source.loop = true;
|
| -
|
| - var filter = context.createBiquadFilter();
|
| - filter.type = "lowpass";
|
| -
|
| - source.connect(filter);
|
| - filter.connect(context.destination);
|
| -
|
| - var V0 = 880;
|
| - var T0 = 0;
|
| - filter.frequency.setValueAtTime(V0, T0);
|
| -
|
| - var V1 = -1000;
|
| - var T1 = renderDuration / 4;
|
| - filter.frequency.linearRampToValueAtTime(V1, T1);
|
| -
|
| - var V2 = 880;
|
| - var T2 = renderDuration / 2;
|
| - filter.frequency.linearRampToValueAtTime(V2, T2);
|
| -
|
| - source.start();
|
| -
|
| - context.startRendering().then(function (buffer) {
|
| - var result = buffer.getChannelData(0);
|
| - var success = true;
|
| -
|
| - // When the cutoff frequency of a lowpass filter is 0, nothing gets
|
| - // through. Hence the output of the filter between the clamping
|
| - // period should be exactly zero. This tests passes if the output is 0
|
| - // during the expected range.
|
| - //
|
| - // Compute when the frequency value of the biquad goes to 0. In
|
| - // general, t = (T0*V1 -T1*V0)/(V1-V0) (using the notation from the
|
| - // spec.)
|
| - var clampStartTime = solveLinearRamp(0, V0, T0, V1, T1);
|
| - var clampEndTime = solveLinearRamp(0, V1, T1, V2, T2);
|
| -
|
| - var clampStartFrame = Math.ceil(clampStartTime * sampleRate);
|
| - var clampEndFrame = Math.floor(clampEndTime * sampleRate);
|
| -
|
| - var clampedSignal = result.slice(clampStartFrame, clampEndFrame + 1);
|
| - var expectedSignal = new Float32Array(clampedSignal.length);
|
| - expectedSignal.fill(0);
|
| -
|
| - // Output should be zero.
|
| - success = Should("Clamped signal in frame range [" + clampStartFrame + ", " +
|
| - clampEndFrame + "]",
|
| - clampedSignal, {
|
| - verbose: true,
|
| - }).beCloseToArray(expectedSignal, 0);
|
| -
|
| - // Find the actual clamp range based on the output values.
|
| - var actualClampStart = result.findIndex(x => x === 0);
|
| - var actualClampEnd = actualClampStart + result.slice(actualClampStart).findIndex(
|
| - x => x != 0);
|
| -
|
| - // Verify that the expected clamping range is a subset of the actual range.
|
| - success = Should("Actual Clamp start",
|
| - actualClampStart).beLessThanOrEqualTo(clampStartFrame) && success;
|
| - success == Should("Actual Clamp end",
|
| - actualClampEnd).beGreaterThanOrEqualTo(clampEndFrame) && success;
|
| -
|
| - if (success)
|
| - testPassed("Clamping of BiquadFilter.frequency automation performed correctly.")
|
| - else
|
| - testFailed(
|
| - "Clamping of BiquadFilter.frequency automation performed incorrectly.")
|
| -
|
| - }).then(done);
|
| - });
|
| -
|
| - // All done!
|
| - audit.defineTask("finish", function (done) {
|
| - finishJSTest();
|
| - done();
|
| - });
|
| -
|
| - audit.runTasks();
|
| -
|
| - function solveLinearRamp(v, v0, t0, v1, t1) {
|
| - // Solve the linear ramp equation for the time t at which the ramp
|
| - // reaches the value v. The linear ramp equation (from the spec) is
|
| - //
|
| - // v(t) = v0 + (v1 - v0) * (t - t0)/(t1 - t0)
|
| - //
|
| - // Find t such that
|
| - //
|
| - // v = v0 + (v1 - v0) * (t - t0)/(t1 - t0)
|
| - //
|
| - // Then
|
| - //
|
| - // t = (t0 * v1 - t1 * v0 + (t1 - t0) * v) / (v1 - v0)
|
| - //
|
| - return (t0 * v1 - t1 * v0 + (t1 - t0) * v) / (v1 - v0);
|
| - }
|
| - </script>
|
| - </body>
|
| -</html>
|
|
|
Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
