| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| offlineaudiocontext-suspend-resume-sequence.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> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| let audit = Audit.createTaskRunner(); |
| let context; |
| |
| // The sample rate is multiple of the rendering quantum, so suspension |
| // times fall in to the render quantum boundary. |
| let renderQuantum = 128; |
| |
| let sampleRate = renderQuantum * 100; |
| let renderDuration = 2; |
| |
| // These numbers are in an arbitrary order, but not randomly generated in |
| // runtime to avoid moving pieces. However, it is safe to arrange them |
| // in a random order in runtime. |
| // |
| // Also these numbers are multiple of 0.25, so they are supposed to fall |
| // in the render quantum boundary for easier and more intuitive |
| // verification. |
| let suspendTimes = [0.25, 0.75, 1.0, 0.5, 1.25, 0.0, 1.75]; |
| |
| // Sorted ascending suspend time is our expected result. |
| let expectedSuspendTimes = suspendTimes.slice(0).sort(function(a, b) { |
| return a - b; |
| }); |
| |
| let actualSuspendTimes = []; |
| |
| audit.define( |
| { |
| label: 'test', |
| description: 'resume() and suspend() with timed sequence' |
| }, |
| (task, should) => { |
| context = new OfflineAudioContext( |
| 1, sampleRate * renderDuration, sampleRate); |
| |
| for (let i = 0; i < suspendTimes.length; i++) { |
| // Schedule suspends in a random time order, but the actual |
| // suspend must happen in ascending time order. |
| scheduleSuspend(i, suspendTimes[i], should); |
| } |
| |
| context.startRendering() |
| .then(buffer => verifyResult(should)) |
| .then(() => task.done()); |
| |
| }); |
| |
| audit.run(); |
| |
| function scheduleSuspend(index, suspendTime, should) { |
| should( |
| () => context.suspend(suspendTime).then(() => { |
| actualSuspendTimes.push(suspendTime); |
| context.resume(); |
| }), |
| 'Scheduling suspend #' + index + ' at ' + suspendTime + |
| ' second(s)') |
| .notThrow(); |
| } |
| |
| function verifyResult(should) { |
| for (let i = 0; i < actualSuspendTimes.length; i++) { |
| let scheduledOrder = suspendTimes.indexOf(actualSuspendTimes[i]); |
| let expectedOrder = |
| expectedSuspendTimes.indexOf(actualSuspendTimes[i]); |
| |
| should( |
| i, |
| 'The resolution order of suspend #' + scheduledOrder + ' is ' + |
| i + ' at ' + suspendTimes[scheduledOrder].toFixed(2) + |
| ' second(s)') |
| .beEqualTo(expectedOrder); |
| } |
| } |
| </script> |
| </body> |
| </html> |
