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| 1 <!doctype html> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test Clamping of PannerNode rolloffFactor</title> | |
| 5 <script src="../resources/testharness.js"></script> | |
| 6 <script src="../resources/testharnessreport.js"></script> | |
| 7 <script src="resources/audit-util.js"></script> | |
| 8 <script src="resources/audio-testing.js"></script> | |
| 9 </head> | |
| 10 | |
| 11 <body> | |
| 12 <script> | |
| 13 // Fairly arbitrary sample rate and render frames. | |
| 14 var sampleRate = 16000; | |
| 15 var renderFrames = 2048; | |
| 16 | |
| 17 var audit = Audit.createTaskRunner(); | |
| 18 | |
| 19 audit.defineTask("linear-clamp-low", function (taskDone) { | |
| 20 runTest({ | |
| 21 distanceModel: "linear", | |
| 22 // Fairly arbitrary value outside the nominal range | |
| 23 rolloffFactor: -1, | |
| 24 clampedRolloff: 0 | |
| 25 }).then(taskDone); | |
| 26 }); | |
| 27 | |
| 28 audit.defineTask("linear-clamp-high", function (taskDone) { | |
| 29 runTest({ | |
| 30 distanceModel: "linear", | |
| 31 // Fairly arbitrary value outside the nominal range | |
| 32 rolloffFactor: 2, | |
| 33 clampedRolloff: 1 | |
| 34 }).then(taskDone); | |
| 35 }); | |
| 36 | |
| 37 audit.defineTask("inverse-clamp", function (taskDone) { | |
| 38 runTest({ | |
| 39 distanceModel: "inverse", | |
| 40 // Fairly arbitrary value outside the nominal range | |
| 41 rolloffFactor: -1, | |
| 42 clampedRolloff: 0 | |
| 43 }).then(taskDone); | |
| 44 }); | |
| 45 | |
| 46 audit.defineTask("exponential-clamp", function (taskDone) { | |
| 47 runTest({ | |
| 48 distanceModel: "exponential", | |
| 49 // Fairly arbitrary value outside the nominal range | |
| 50 rolloffFactor: -2, | |
| 51 clampedRolloff: 0 | |
| 52 }).then(taskDone); | |
| 53 }); | |
| 54 | |
| 55 // Test clamping of the rolloffFactor. The test is done by comparing the | |
| 56 // output of a panner with the rolloffFactor set outside the nominal range | |
| 57 // against the output of a panner with the rolloffFactor clamped to the | |
| 58 // nominal range. The outputs should be the same. | |
| 59 // | |
| 60 // The |options| dictionary should contain the members | |
| 61 // distanceModel - The distance model to use for the panners | |
| 62 // rolloffFactor - The desired rolloffFactor. Should be outside the | |
| 63 // nominal range of the distance model. | |
| 64 // clampedRolloff - The rolloffFactor (above) clamped to the nominal | |
| 65 // range for the given distance model. | |
| 66 function runTest(options) { | |
| 67 // Offline context with two channels. The first channel is the panner | |
| 68 // node under test. The second channel is the reference panner node. | |
| 69 var context = new OfflineAudioContext(2, renderFrames, sampleRate); | |
| 70 | |
| 71 // The source for the panner nodes. This is fairly arbitrary. | |
| 72 var src = new OscillatorNode(context, { | |
| 73 type: "sawtooth" | |
| 74 }); | |
| 75 | |
| 76 // Create the test panner with the specified rolloff factor. The | |
| 77 // position is fairly arbitrary, but something that is not the default | |
| 78 // is good to show the distance model had some effect. | |
| 79 var pannerTest = new PannerNode(context, { | |
| 80 rolloffFactor: options.rolloffFactor, | |
| 81 distanceModel: options.distanceModel, | |
| 82 positionX: 5000 | |
| 83 }); | |
| 84 | |
| 85 // Create the reference panner with the rolloff factor clamped to the | |
| 86 // appropriate limit. | |
| 87 var pannerRef = new PannerNode(context, { | |
| 88 rolloffFactor: options.clampedRolloff, | |
| 89 distanceModel: options.distanceModel, | |
| 90 positionX: 5000 | |
| 91 }); | |
| 92 | |
| 93 | |
| 94 // Connect the source to the panners to the destination appropriately. | |
| 95 var merger = new ChannelMergerNode(context, { | |
| 96 numberOfInputs: 2 | |
| 97 }); | |
| 98 | |
| 99 | |
| 100 src.connect(pannerTest).connect(merger, 0, 0); | |
| 101 src.connect(pannerRef).connect(merger, 0, 1); | |
| 102 | |
| 103 merger.connect(context.destination); | |
| 104 | |
| 105 src.start(); | |
| 106 | |
| 107 return context.startRendering() | |
| 108 .then(function (resultBuffer) { | |
| 109 // The two channels should be the same due to the clamping. Verify | |
| 110 // that they are the same. | |
| 111 var actual = resultBuffer.getChannelData(0); | |
| 112 var expected = resultBuffer.getChannelData(1); | |
| 113 | |
| 114 var message = 'Panner distanceModel: "' + options.distanceModel + | |
| 115 '", rolloffFactor: ' + options.rolloffFactor; | |
| 116 | |
| 117 var success = Should(message, actual) | |
| 118 .beEqualToArray(expected); | |
| 119 | |
| 120 Should(message, success) | |
| 121 .summarize( | |
| 122 "correctly clamped rolloffFactor to " + options.clampedRolloff, | |
| 123 "did not correctly clamp rolloffFactor to " + options.clampedRol
loff); | |
| 124 }); | |
| 125 } | |
| 126 | |
| 127 audit.runTasks(); | |
| 128 </script> | |
| 129 </body> | |
| 130 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
