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| 1 <!doctype html> | 1 <!DOCTYPE html> |
| 2 <html> | 2 <html> |
| 3 <head> | 3 <head> |
| 4 <title>Test linearRampToValue Updates the Param Value</title> | 4 <title> |
| 5 Test linearRampToValue Updates the Param Value |
| 6 </title> |
| 5 <script src="../../resources/testharness.js"></script> | 7 <script src="../../resources/testharness.js"></script> |
| 6 <script src="../../resources/testharnessreport.js"></script> | 8 <script src="../../resources/testharnessreport.js"></script> |
| 7 <script src="../resources/audit-util.js"></script> | 9 <script src="../resources/audit-util.js"></script> |
| 8 <script src="../resources/audit.js"></script> | 10 <script src="../resources/audit.js"></script> |
| 9 </head> | 11 </head> |
| 12 <body> |
| 13 <script id="layout-test-code"> |
| 14 let renderQuantumSize = 128; |
| 15 // Should be a power of two to get rid of rounding errors when converting |
| 16 // between time and frame. |
| 17 let sampleRate = 4096; |
| 18 let renderDuration = 1; |
| 19 // End time of the linear ramp automation |
| 20 let rampEndTime = renderDuration / 2; |
| 10 | 21 |
| 11 <body> | 22 let audit = Audit.createTaskRunner(); |
| 12 <script> | |
| 13 | 23 |
| 14 var renderQuantumSize = 128; | 24 // Test that linearRampToValue properly sets the AudioParam .value |
| 15 // Should be a power of two to get rid of rounding errors when converting
between time and | 25 // attribute when the linearRamp automation is running. |
| 16 // frame. | 26 audit.define('propagate', (task, should) => { |
| 17 var sampleRate = 4096; | 27 let context = |
| 18 var renderDuration = 1; | 28 new OfflineAudioContext(1, renderDuration * sampleRate, sampleRate); |
| 19 // End time of the linear ramp automation | |
| 20 var rampEndTime = renderDuration / 2; | |
| 21 | |
| 22 var audit = Audit.createTaskRunner(); | |
| 23 | |
| 24 // Test that linearRampToValue properly sets the AudioParam .value attribu
te when the | |
| 25 // linearRamp automation is running. | |
| 26 audit.define("propagate", (task, should) => { | |
| 27 var context = new OfflineAudioContext(1, renderDuration * sampleRate, sa
mpleRate); | |
| 28 | 29 |
| 29 // Create a constant source. | 30 // Create a constant source. |
| 30 var source = context.createBufferSource(); | 31 let source = context.createBufferSource(); |
| 31 source.buffer = createConstantBuffer(context, 1, 1); | 32 source.buffer = createConstantBuffer(context, 1, 1); |
| 32 source.loop = true; | 33 source.loop = true; |
| 33 | 34 |
| 34 // The gain node to be automated for testing. | 35 // The gain node to be automated for testing. |
| 35 var gain = context.createGain(); | 36 let gain = context.createGain(); |
| 36 | 37 |
| 37 gain.gain.setValueAtTime(0, 0); | 38 gain.gain.setValueAtTime(0, 0); |
| 38 gain.gain.linearRampToValueAtTime(1, rampEndTime); | 39 gain.gain.linearRampToValueAtTime(1, rampEndTime); |
| 39 | 40 |
| 40 // Connect up the graph | 41 // Connect up the graph |
| 41 source.connect(gain); | 42 source.connect(gain); |
| 42 gain.connect(context.destination); | 43 gain.connect(context.destination); |
| 43 | 44 |
| 44 var success = true; | 45 let success = true; |
| 45 | 46 |
| 46 // The number of rendering quanta that will be processed in the context.
At the beginning | 47 // The number of rendering quanta that will be processed in the context. |
| 47 // of each rendering quantum (except the first), we will check that gain
.gain.value has the | 48 // At the beginning of each rendering quantum (except the first), we |
| 48 // expected value. | 49 // will check that gain.gain.value has the expected value. |
| 49 var renderLoops = Math.floor(renderDuration * sampleRate / renderQuantum
Size); | 50 let renderLoops = |
| 51 Math.floor(renderDuration * sampleRate / renderQuantumSize); |
| 50 | 52 |
| 51 for (var k = 1; k < renderLoops; ++k) { | 53 for (let k = 1; k < renderLoops; ++k) { |
| 52 var time = k * renderQuantumSize / sampleRate; | 54 let time = k * renderQuantumSize / sampleRate; |
| 53 context.suspend(time).then(function () { | 55 context.suspend(time) |
| 54 var expected = 1; | 56 .then(function() { |
| 57 let expected = 1; |
| 55 | 58 |
| 56 if (context.currentTime <= rampEndTime) { | 59 if (context.currentTime <= rampEndTime) { |
| 57 // The expected value of the gain is the last computed value from
the previous | 60 // The expected value of the gain is the last computed value |
| 58 // rendering quantum because suspend() stops at the beginning of a
rendering quantum, | 61 // from the previous rendering quantum because suspend() stops |
| 59 // so we haven't computed the new value yet. | 62 // at the beginning of a rendering quantum, so we haven't |
| 60 expected = (context.currentTime - 1 / sampleRate) / rampEndTime; | 63 // computed the new value yet. |
| 61 } | 64 expected = |
| 65 (context.currentTime - 1 / sampleRate) / rampEndTime; |
| 66 } |
| 62 | 67 |
| 63 var frame = context.currentTime * sampleRate - 1; | 68 let frame = context.currentTime * sampleRate - 1; |
| 64 success = should(gain.gain.value, | 69 success = |
| 65 "gain.gain.value at frame " + frame) | 70 should(gain.gain.value, 'gain.gain.value at frame ' + frame) |
| 66 .beEqualTo(expected); | 71 .beEqualTo(expected); |
| 67 }).then(context.resume.bind(context)); | 72 }) |
| 73 .then(context.resume.bind(context)); |
| 68 } | 74 } |
| 69 | 75 |
| 70 // Rock and roll! | 76 // Rock and roll! |
| 71 source.start(); | 77 source.start(); |
| 72 context.startRendering().then(function (result) { | 78 context.startRendering() |
| 73 should(success, "linearRampToValue") | 79 .then(function(result) { |
| 74 .message("properly set the AudioParam value", | 80 should(success, 'linearRampToValue') |
| 75 "did not properly set the AudioParam value"); | 81 .message( |
| 76 }).then(() => task.done()); | 82 'properly set the AudioParam value', |
| 83 'did not properly set the AudioParam value'); |
| 84 }) |
| 85 .then(() => task.done()); |
| 77 }); | 86 }); |
| 78 | 87 |
| 79 audit.run(); | 88 audit.run(); |
| 80 </script> | 89 </script> |
| 81 </body> | 90 </body> |
| 82 </html> | 91 </html> |
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Chromium Code Reviews
Issue 2895963003:
Apply layout-test-tidy to LayoutTests/webaudio (Closed)
