| Index: third_party/WebKit/LayoutTests/webaudio/audioparam-sampling.html
|
| diff --git a/third_party/WebKit/LayoutTests/webaudio/audioparam-sampling.html b/third_party/WebKit/LayoutTests/webaudio/audioparam-sampling.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..01c23b36938988711c5ab55d61a7a99f54514853
|
| --- /dev/null
|
| +++ b/third_party/WebKit/LayoutTests/webaudio/audioparam-sampling.html
|
| @@ -0,0 +1,178 @@
|
| +<!doctype html>
|
| +<html>
|
| + <head>
|
| + <script src="resources/compatibility.js"></script>
|
| + <script src="resources/audio-testing.js"></script>
|
| + <script src="resources/audioparam-testing.js"></script>
|
| + <script src="../resources/js-test.js"></script>
|
| + <title>Test Sampling of LinearRampToValueAtTime</title>
|
| + </head>
|
| +
|
| + <body>
|
| + <script>
|
| + description("Test Sampling of LinearRampToValueAtTime");
|
| +
|
| + window.jsTestIsAsync = true;
|
| + var sampleRate = 12800;
|
| + var context;
|
| +
|
| + var audit = Audit.createTaskRunner();
|
| +
|
| + function runTest(config) {
|
| + // Create a short context with a constant signal source connected to a gain node that will
|
| + // be automated.
|
| + context = new OfflineAudioContext(1, 256, sampleRate);
|
| +
|
| + // Create a constant unit amplitude source.
|
| + var source = context.createBufferSource();
|
| + var b = createConstantBuffer(context, 1, 1);
|
| + source.buffer = b;
|
| + source.loop = true;
|
| +
|
| + // Gain node that is to be automated.
|
| + var gain = context.createGain();
|
| + gain.gain.value = 0;
|
| + gain.gain.setValueAtTime(config.startValue, config.startTime);
|
| + config.automationFunction(gain);
|
| +
|
| + source.connect(gain);
|
| + gain.connect(context.destination);
|
| +
|
| + source.start();
|
| +
|
| + return context.startRendering().then(function (resultBuffer) {
|
| + // Check that the automation has the correct sampling.
|
| + var resultData = resultBuffer.getChannelData(0);
|
| +
|
| + // The automation has starts at config.startTime, so the frame just after this should have
|
| + // the automation applied.
|
| + var startFrame = Math.ceil(config.startTime * sampleRate);
|
| +
|
| + // The automation ends at config.endTime so the frame just before this should have the
|
| + // automation applied.
|
| + var endFrame = Math.floor(config.endTime * sampleRate);
|
| +
|
| + // Use the true automation to find the expected values.
|
| + var expectedStart = config.expectedFunction(startFrame / sampleRate);
|
| + var expectedEnd = config.expectedFunction(endFrame / sampleRate);
|
| +
|
| + var success = Should(config.desc + ": Sample " + startFrame,
|
| + resultData[startFrame]).beCloseTo(expectedStart, config.startValueThreshold, 7);
|
| + success = Should(config.desc + ": Sample " + endFrame,
|
| + resultData[endFrame]).beCloseTo(expectedEnd, config.endValueThreshold, 7) && success;
|
| +
|
| + if (success)
|
| + testPassed(config.desc + " passed.\n");
|
| + else
|
| + testFailed(config.desc + " failed.\n");
|
| + });
|
| + }
|
| +
|
| + function expectedLinear(t) {
|
| + var slope = (this.endValue - this.startValue) / (this.endTime - this.startTime);
|
| + return this.startValue + slope * (t - this.startTime);
|
| + };
|
| +
|
| + function expectedExponential(t) {
|
| + var ratio = this.endValue / this.startValue;
|
| + var exponent = (t - this.startTime) / (this.endTime - this.startTime);
|
| + return this.startValue * Math.pow(ratio, exponent);
|
| + };
|
| +
|
| + function linearAutomation(g) {
|
| + g.gain.linearRampToValueAtTime(this.endValue, this.endTime);
|
| + }
|
| +
|
| + function exponentialAutomation(g) {
|
| + g.gain.exponentialRampToValueAtTime(this.endValue, this.endTime);
|
| + }
|
| +
|
| + // Basically want to test that if neither the start time nor end time is on a frame boundary
|
| + // that we sample the automation curve correctly. The start times and end times are mostly
|
| + // arbitrary, except that they cannot be on a frame boundary.
|
| + var testConfigs = [{
|
| + desc: "linearRamp",
|
| + startTime: .1 / sampleRate,
|
| + endTime: 128.1 / sampleRate,
|
| + startValue: 1,
|
| + endValue: 0,
|
| + startValueThreshold: 1.201e-8,
|
| + endValueThreshold: 1.526e-5,
|
| + automationFunction: linearAutomation,
|
| + expectedFunction: expectedLinear
|
| + }, {
|
| + desc: "linearRamp:short",
|
| + startTime: .1 / sampleRate,
|
| + endTime: 5.1 / sampleRate,
|
| + startValue: 1,
|
| + endValue: 0,
|
| + startValueThreshold: 8.723e-9,
|
| + endValueThreshold: 9.537e-7,
|
| + automationFunction: linearAutomation,
|
| + expectedFunction: expectedLinear
|
| + }, {
|
| + desc: "linearRamp:long",
|
| + startTime: .1 / sampleRate,
|
| + endTime: 200.1 / sampleRate,
|
| + startValue: 1,
|
| + endValue: 0,
|
| + startValueThreshold: 2.827e-8,
|
| + endValueThreshold: 4.674e-5,
|
| + automationFunction: linearAutomation,
|
| + expectedFunction: expectedLinear
|
| + }, {
|
| + desc: "exponentialRamp",
|
| + startTime: .1 / sampleRate,
|
| + endTime: 128.1 / sampleRate,
|
| + startValue: 1,
|
| + endValue: 1e-5,
|
| + startValueThreshold: 2.505e-8,
|
| + endValueThreshold: 1.484e-7,
|
| + automationFunction: exponentialAutomation,
|
| + expectedFunction: expectedExponential
|
| + }, {
|
| + desc: "exponentialRamp:short",
|
| + startTime: .1 / sampleRate,
|
| + endTime: 5.1 / sampleRate,
|
| + startValue: 1,
|
| + endValue: 1e-5,
|
| + startValueThreshold: 5.027e-8,
|
| + endValueThreshold: 3.821e-7,
|
| + automationFunction: exponentialAutomation,
|
| + expectedFunction: expectedExponential
|
| + }, {
|
| + desc: "exponentialRamp:long",
|
| + startTime: .1 / sampleRate,
|
| + endTime: 200.1 / sampleRate,
|
| + startValue: 1,
|
| + endValue: 1e-5,
|
| + startValueThreshold: 8.035e-9,
|
| + endValueThreshold: 1.337e-6,
|
| + automationFunction: exponentialAutomation,
|
| + expectedFunction: expectedExponential
|
| + },
|
| + ];
|
| +
|
| + function createTaskFunction(config) {
|
| + return function (done) {
|
| + runTest(config).then(done);
|
| + };
|
| + }
|
| +
|
| + // Create all of the tasks from the test configs
|
| + for (var k = 0; k < testConfigs.length; ++k) {
|
| + var config = testConfigs[k];
|
| + var taskName = config.desc + ":task" + k;
|
| + audit.defineTask(taskName, createTaskFunction(config));
|
| + }
|
| +
|
| + audit.defineTask("finish", function (done) {
|
| + finishJSTest();
|
| + done();
|
| + });
|
| +
|
| + audit.runTasks();
|
| + successfullyParsed = true;
|
| + </script>
|
| + </body>
|
| +</html>
|
|
|
Chromium Code Reviews
Issue 1377903002:
Use frames instead of time for running AudioParam timelines. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master