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| 1 <!doctype html> |
| 2 <html> |
| 3 <head> |
| 4 <script src="../resources/js-test.js"></script> |
| 5 <script src="resources/compatibility.js"></script> |
| 6 <script src="resources/audio-testing.js"></script> |
| 7 <script src="resources/panner-formulas.js"></script> |
| 8 <title>Test setValueCurveAtTime Copies the Curve Data</title> |
| 9 </head> |
| 10 |
| 11 <body> |
| 12 <script> |
| 13 description("Test setValueCurveAtTime Copies the Curve Data"); |
| 14 window.jsTestIsAsync = true; |
| 15 |
| 16 var sampleRate = 48000; |
| 17 var renderFrames = 1024; |
| 18 var renderDuration = renderFrames / sampleRate; |
| 19 |
| 20 var audit = Audit.createTaskRunner(); |
| 21 |
| 22 // Test that changing the curve array to setValueCurveAtTime doesn't |
| 23 // change the automation output. |
| 24 audit.defineTask("test-copy", function (done) { |
| 25 // Two-channel context; channel 0 is the test result, and channel 1 is |
| 26 // the expected result. |
| 27 var context = new OfflineAudioContext(2, renderFrames, sampleRate); |
| 28 |
| 29 var source = context.createBufferSource(); |
| 30 source.buffer = createConstantBuffer(context, 1, 1); |
| 31 source.loop = true; |
| 32 |
| 33 // Create two gain nodes. gainRef is the reference with the expected |
| 34 // automation results. gainTest is the test which will have the curve |
| 35 // modified. |
| 36 var gainTest = context.createGain(); |
| 37 var gainRef = context.createGain(); |
| 38 |
| 39 var merger = context.createChannelMerger(2); |
| 40 |
| 41 // The actual curve data can be anything, but we use this for |
| 42 // simplicity. |
| 43 var curveData = [1, 0]; |
| 44 var curveRef = Float32Array.from(curveData); |
| 45 var curveTest = Float32Array.from(curveData); |
| 46 |
| 47 // Create the graph. |
| 48 source.connect(gainTest); |
| 49 source.connect(gainRef); |
| 50 gainTest.connect(merger, 0, 0); |
| 51 gainRef.connect(merger, 0, 1); |
| 52 merger.connect(context.destination); |
| 53 |
| 54 // Initialize the gains. |
| 55 gainTest.gain.setValueAtTime(0, 0); |
| 56 gainRef.gain.setValueAtTime(0, 0); |
| 57 |
| 58 // Set up the value curve. At this point curveTest and curveRef are the |
| 59 // same. |
| 60 gainTest.gain.setValueCurveAtTime(curveTest, 0, renderDuration); |
| 61 gainRef.gain.setValueCurveAtTime(curveRef, 0, renderDuration); |
| 62 |
| 63 // After rendering has started, modify curveTest. |
| 64 context.suspend(128 / sampleRate).then(function () { |
| 65 // Change the values of curve now. Any transformation is ok as long |
| 66 // as curveTest changes. We do this to make it really obvious. |
| 67 for (var k = 0; k < curveTest.length; ++k) |
| 68 curveTest[k] = 100 * curveTest[k] + 1; |
| 69 }).then(context.resume.bind(context)); |
| 70 |
| 71 // Start the test! |
| 72 source.start(); |
| 73 |
| 74 context.startRendering().then(function (resultBuffer) { |
| 75 var testData = resultBuffer.getChannelData(0); |
| 76 var refData = resultBuffer.getChannelData(1); |
| 77 |
| 78 // The test result and the reference should be identical since |
| 79 // changing the curve data should not affect the automation. |
| 80 var success = Should("setValueCurve output", testData).beEqualToArray(
refData); |
| 81 |
| 82 if (success) |
| 83 testPassed("Changing the curve data did not change the result."); |
| 84 else |
| 85 testFailed("Changing the curve data unexpectedly changed the result.
"); |
| 86 }).then(done); |
| 87 }); |
| 88 |
| 89 audit.defineTask("finish", function (done) { |
| 90 finishJSTest(); |
| 91 done(); |
| 92 }); |
| 93 |
| 94 audit.runTasks(); |
| 95 </script> |
| 96 </body> |
| 97 </html> |
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Chromium Code Reviews
Issue 2016563002:
AudioParam.setValueCurveAtTime() should copy the curve data (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master