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| 1 <!doctype html> |
| 2 <html> |
| 3 <head> |
| 4 <script src="../resources/js-test.js"></script> |
| 5 <script src="resources/compatibility.js"></script> |
| 6 <script src="resources/audio-testing.js"></script> |
| 7 <title>AudioParam with Huge End Time</title> |
| 8 </head> |
| 9 |
| 10 <body> |
| 11 <script> |
| 12 description("Test AudioParam with Huge Time Value") |
| 13 window.jsTestIsAsync = true; |
| 14 |
| 15 var sampleRate = 48000; |
| 16 // Render for some small (but fairly arbitrary) time. |
| 17 var renderDuration = 0.125; |
| 18 // Any huge time value that won't fit in a size_t (2^64 on a 64-bit machin
e). |
| 19 var largeTime = 1e300; |
| 20 |
| 21 var audit = Audit.createTaskRunner(); |
| 22 |
| 23 // See crbug.com/582701. Create an audioparam with a huge end time and ve
rify that to |
| 24 // automation is run. We don't care about the actual results, just that i
t runs. |
| 25 |
| 26 // Test linear ramp with huge end time |
| 27 audit.defineTask("linearRamp", function (done) { |
| 28 var graph = createGraph(); |
| 29 graph.gain.gain.linearRampToValueAtTime(0.1, largeTime); |
| 30 |
| 31 graph.source.start(); |
| 32 graph.context.startRendering().then(function (buffer) { |
| 33 testPassed("linearRampToValue(0.1, " + largeTime + ") successfully ren
dered."); |
| 34 }).then(done); |
| 35 }); |
| 36 |
| 37 // Test exponential ramp with huge end time |
| 38 audit.defineTask("exponentialRamp", function (done) { |
| 39 var graph = createGraph(); |
| 40 graph.gain.gain.exponentialRampToValueAtTime(.1, largeTime); |
| 41 |
| 42 graph.source.start(); |
| 43 graph.context.startRendering().then(function (buffer) { |
| 44 testPassed("exponentialRampToValue(0.1, " + largeTime + ") successfull
y rendered."); |
| 45 }).then(done); |
| 46 }); |
| 47 |
| 48 audit.defineTask("finish", function (done) { |
| 49 finishJSTest(); |
| 50 done(); |
| 51 }); |
| 52 |
| 53 audit.runTasks(); |
| 54 |
| 55 // Create the graph and return the context, the source, and the gain node. |
| 56 function createGraph() { |
| 57 var context = new OfflineAudioContext(1, renderDuration * sampleRate, sa
mpleRate); |
| 58 var src = context.createBufferSource(); |
| 59 src.buffer = createConstantBuffer(context, 1, 1); |
| 60 src.loop = true; |
| 61 var gain = context.createGain(); |
| 62 src.connect(gain); |
| 63 gain.connect(context.destination); |
| 64 gain.gain.setValueAtTime(1, 0.1 / sampleRate); |
| 65 |
| 66 return { |
| 67 context: context, |
| 68 gain: gain, |
| 69 source: src |
| 70 }; |
| 71 } |
| 72 |
| 73 </script> |
| 74 </body> |
| 75 </html> |
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Chromium Code Reviews
Issue 1674173003:
Carefully handle large end time values in AudioParam automations (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@2623