| <!doctype html> |
| <html> |
| <head> |
| <script src="../resources/js-test.js"></script> |
| <script src="resources/compatibility.js"></script> |
| <script src="resources/audio-testing.js"></script> |
| </head> |
| |
| <body> |
| <script> |
| description('Test OfflineAudioContext.resume() and OfflineAudioContext.suspend() with the timed sequence.'); |
| window.jsTestIsAsync = true; |
| |
| var context; |
| |
| // The sample rate is multiple of the rendering quantum, so suspension |
| // times fall in to the render quantum boundary. |
| var renderQuantum = 128; |
| |
| var sampleRate = renderQuantum * 100; |
| var 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. |
| var suspendTimes = [0.25, 0.75, 1.0, 0.5, 1.25, 0.0, 1.75]; |
| |
| // Sorted ascending suspend time is our expected result. |
| var expectedSuspendTimes = suspendTimes.slice(0).sort(function (a, b) { |
| return a - b; |
| }); |
| |
| var actualSuspendTimes = []; |
| |
| context = new OfflineAudioContext(1, sampleRate * renderDuration, sampleRate); |
| |
| for (var 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]); |
| |
| } |
| |
| function scheduleSuspend(index, suspendTime) { |
| testPassed('Scheduling suspend #' + index + ' at ' + suspendTime + ' second(s).'); |
| context.suspend(suspendTime).then(function () { |
| actualSuspendTimes.push(suspendTime); |
| context.resume(); |
| }) |
| } |
| |
| function verifyResult() { |
| |
| for (var i = 0; i < actualSuspendTimes.length; i++) { |
| var scheduledOrder = suspendTimes.indexOf(actualSuspendTimes[i]); |
| var expectedOrder = expectedSuspendTimes.indexOf(actualSuspendTimes[i]); |
| |
| if (i === expectedOrder) { |
| testPassed('The resolution order of suspend #' + scheduledOrder + |
| ' is ' + i + ' at ' + suspendTimes[scheduledOrder].toFixed(2) + |
| ' second(s).'); |
| } |
| } |
| } |
| |
| context.startRendering().then(verifyResult).then(finishJSTest); |
| |
| successfullyParsed = true; |
| </script> |
| |
| </body> |
| </html> |
