| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| Test Clamping of PannerNode rolloffFactor |
| </title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../../resources/audit-util.js"></script> |
| <script src="../../resources/audit.js"></script> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| // Fairly arbitrary sample rate and render frames. |
| let sampleRate = 16000; |
| let renderFrames = 2048; |
| |
| let audit = Audit.createTaskRunner(); |
| |
| audit.define( |
| { |
| label: 'linear-clamp-high', |
| description: 'rolloffFactor clamping for linear distance model' |
| }, |
| (task, should) => { |
| runTest(should, { |
| distanceModel: 'linear', |
| // Fairly arbitrary value outside the nominal range |
| rolloffFactor: 2, |
| clampedRolloff: 1 |
| }).then(() => task.done()); |
| }); |
| |
| // Test clamping of the rolloffFactor. The test is done by comparing the |
| // output of a panner with the rolloffFactor set outside the nominal range |
| // against the output of a panner with the rolloffFactor clamped to the |
| // nominal range. The outputs should be the same. |
| // |
| // The |options| dictionary should contain the members |
| // distanceModel - The distance model to use for the panners |
| // rolloffFactor - The desired rolloffFactor. Should be outside the |
| // nominal range of the distance model. |
| // clampedRolloff - The rolloffFactor (above) clamped to the nominal |
| // range for the given distance model. |
| function runTest(should, options) { |
| // Offline context with two channels. The first channel is the panner |
| // node under test. The second channel is the reference panner node. |
| let context = new OfflineAudioContext(2, renderFrames, sampleRate); |
| |
| // The source for the panner nodes. This is fairly arbitrary. |
| let src = new OscillatorNode(context, {type: 'sawtooth'}); |
| |
| // Create the test panner with the specified rolloff factor. The |
| // position is fairly arbitrary, but something that is not the default |
| // is good to show the distance model had some effect. |
| let pannerTest = new PannerNode(context, { |
| rolloffFactor: options.rolloffFactor, |
| distanceModel: options.distanceModel, |
| positionX: 5000 |
| }); |
| |
| // Create the reference panner with the rolloff factor clamped to the |
| // appropriate limit. |
| let pannerRef = new PannerNode(context, { |
| rolloffFactor: options.clampedRolloff, |
| distanceModel: options.distanceModel, |
| positionX: 5000 |
| }); |
| |
| |
| // Connect the source to the panners to the destination appropriately. |
| let merger = new ChannelMergerNode(context, {numberOfInputs: 2}); |
| |
| |
| src.connect(pannerTest).connect(merger, 0, 0); |
| src.connect(pannerRef).connect(merger, 0, 1); |
| |
| merger.connect(context.destination); |
| |
| src.start(); |
| |
| return context.startRendering().then(function(resultBuffer) { |
| // The two channels should be the same due to the clamping. Verify |
| // that they are the same. |
| let actual = resultBuffer.getChannelData(0); |
| let expected = resultBuffer.getChannelData(1); |
| |
| let message = 'Panner distanceModel: "' + options.distanceModel + |
| '", rolloffFactor: ' + options.rolloffFactor; |
| |
| should(actual, message).beEqualToArray(expected); |
| }); |
| } |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
