| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| panner-loop.html |
| </title> |
| <script src="../../imported/w3c/web-platform-tests/resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script src="../resources/audit-util.js"></script> |
| <script src="../resources/audit.js"></script> |
| <script src="../resources/panner-model-testing.js"></script> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| let audit = Audit.createTaskRunner(); |
| |
| // See crbug.com/331446. |
| |
| // Create a simple feedback loop and make sure the panner node processes |
| // it correctly. |
| |
| audit.define( |
| {label: 'test', description: 'PannerNode handling of feedback loops'}, |
| (task, should) => { |
| |
| let sampleRate = 44100; |
| let renderLengthSeconds = 1; |
| |
| // Create offline audio context. |
| let context = new OfflineAudioContext( |
| 2, sampleRate * renderLengthSeconds, sampleRate); |
| |
| // Create nodes in graph. This is based on the test given in |
| // crbug.com/331446. |
| let source = context.createBufferSource(); |
| source.buffer = |
| createImpulseBuffer(context, sampleRate * renderLengthSeconds); |
| let activateNode = context.createGain(); |
| let dry = context.createGain(); |
| let wet = context.createGain(); |
| let filter = context.createBiquadFilter(); |
| let delay = context.createDelay(); |
| let feedbackNode = context.createGain(); |
| let output = context.createGain(); |
| |
| delay.delayTime.value = 0.1; |
| wet.gain.value = 0.5; |
| dry.gain.value = 1; |
| feedbackNode.gain.value = 0.45; |
| filter.frequency.value = 20000; |
| |
| source.connect(activateNode); |
| activateNode.connect(delay); |
| activateNode.connect(dry); |
| delay.connect(filter); |
| filter.connect(feedbackNode); |
| feedbackNode.connect(delay); |
| feedbackNode.connect(wet); |
| wet.connect(output); |
| dry.connect(output); |
| |
| let panner = context.createPanner(); |
| panner.coneOuterGain = 0.1; |
| panner.coneOuterAngle = 180; |
| panner.coneInnerAngle = 0; |
| |
| panner.connect(context.destination); |
| |
| output.connect(panner); |
| |
| // Render. We don't care what the output is, though. |
| |
| should(context.startRendering(), 'Rendering of offline context') |
| .beResolved() |
| .then(() => task.done()); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
