| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>Test setValueAtTime with startTime in the past</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/webaudio/resources/audit-util.js"></script> |
| <script src="/webaudio/resources/audit.js"></script> |
| <script src="retrospective-test.js"></script> |
| </head> |
| <body> |
| <script> |
| let audit = Audit.createTaskRunner(); |
| |
| audit.define( |
| { |
| label: 'test', |
| description: 'Test setValueAtTime with startTime in the past' |
| }, |
| (task, should) => { |
| let {context, source, test, reference} = setupRetrospectiveGraph(); |
| |
| // Suspend the context at this frame so we can synchronously set up |
| // automations. |
| const suspendFrame = 128; |
| |
| // Use a ramp of slope 1 per frame to measure time. |
| // The end value is the extent of exact precision in single |
| // precision float. |
| const rampEnd = context.length - suspendFrame; |
| const rampEndSeconds = context.length / context.sampleRate; |
| |
| context.suspend(suspendFrame / context.sampleRate) |
| .then(() => { |
| // Call setValueAtTime with a time in the past |
| test.gain.setValueAtTime(0.0, 0.5 * context.currentTime); |
| test.gain.linearRampToValueAtTime(rampEnd, rampEndSeconds); |
| |
| reference.gain.setValueAtTime(0.0, context.currentTime); |
| reference.gain.linearRampToValueAtTime( |
| rampEnd, rampEndSeconds); |
| }) |
| .then(() => context.resume()); |
| |
| source.start(); |
| |
| context.startRendering() |
| .then(resultBuffer => { |
| let testValue = resultBuffer.getChannelData(0); |
| let referenceValue = resultBuffer.getChannelData(1); |
| |
| // Until the suspendFrame, both should be exactly equal to 1. |
| should( |
| testValue.slice(0, suspendFrame), |
| `Test[0:${suspendFrame - 1}]`) |
| .beConstantValueOf(1); |
| should( |
| referenceValue.slice(0, suspendFrame), |
| `Reference[0:${suspendFrame - 1}]`) |
| .beConstantValueOf(1); |
| |
| // After the suspendFrame, both should be equal (and not |
| // constant) |
| should( |
| testValue.slice(suspendFrame), `Test[${suspendFrame}:]`) |
| .beEqualToArray(referenceValue.slice(suspendFrame)); |
| }) |
| .then(() => task.done()); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
