| <!doctype html> |
| <html> |
| <head> |
| <title>Test Osc.detune Overflow</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/webaudio/resources/audit.js"></script> |
| <script src="/webaudio/resources/audit-util.js"></script> |
| </head> |
| |
| <body> |
| <script> |
| const sampleRate = 44100; |
| const renderLengthFrames = RENDER_QUANTUM_FRAMES; |
| |
| let audit = Audit.createTaskRunner(); |
| |
| audit.define('detune overflow', async (task, should) => { |
| let context = |
| new OfflineAudioContext(1, renderLengthFrames, sampleRate); |
| |
| // This value of frequency and detune results in a computed frequency of |
| // 440*2^(153600/1200) = 1.497e41. The frequency needs to be clamped to |
| // Nyquist. But a sine wave at Nyquist frequency is all zeroes. Verify |
| // the output is 0. |
| let osc = new OscillatorNode(context, {frequency: 440, detune: 153600}); |
| |
| osc.connect(context.destination); |
| |
| let buffer = await context.startRendering(); |
| let output = buffer.getChannelData(0); |
| should(output, 'Osc freq and detune outside nominal range') |
| .beConstantValueOf(0); |
| |
| task.done(); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
