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| (Empty) |
| 1 <!doctype html> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test Start Grain with Delayed Buffer Setting </title> | |
| 5 <script src="../resources/js-test.js"></script> | |
| 6 <script src="resources/compatibility.js"></script> | |
| 7 <script src="resources/audit-util.js"></script> | |
| 8 <script src="resources/audio-testing.js"></script> | |
| 9 </head> | |
| 10 | |
| 11 <body> | |
| 12 <script> | |
| 13 description("Test setting the source buffer after starting the grain"); | |
| 14 | |
| 15 var context; | |
| 16 var source; | |
| 17 var buffer; | |
| 18 var renderedData; | |
| 19 | |
| 20 var sampleRate = 44100; | |
| 21 | |
| 22 var testDurationSec = 1; | |
| 23 var testDurationSamples = testDurationSec * sampleRate; | |
| 24 var startTime = 0.9 * testDurationSec; | |
| 25 | |
| 26 function runTest() { | |
| 27 window.jsTestIsAsync = true; | |
| 28 | |
| 29 context = new OfflineAudioContext(1, testDurationSamples, sampleRate); | |
| 30 context.oncomplete = checkResult; | |
| 31 | |
| 32 buffer = createConstantBuffer(context, testDurationSamples, 1); | |
| 33 source = context.createBufferSource(); | |
| 34 source.connect(context.destination); | |
| 35 | |
| 36 // Start the source BEFORE we set the buffer. The grain offset and dur
ation aren't | |
| 37 // important, as long as we specify some offset. | |
| 38 source.start(startTime, .1); | |
| 39 source.buffer = buffer; | |
| 40 | |
| 41 // Render it! | |
| 42 context.startRendering(); | |
| 43 } | |
| 44 | |
| 45 function checkResult(event) { | |
| 46 var success = false; | |
| 47 | |
| 48 renderedData = event.renderedBuffer.getChannelData(0); | |
| 49 | |
| 50 // Check that the rendered data is not all zeroes. Any non-zero data
means the test | |
| 51 // passed. | |
| 52 var startFrame = Math.round(startTime * sampleRate); | |
| 53 for (k = 0; k < renderedData.length; ++k) { | |
| 54 if (renderedData[k]) { | |
| 55 success = true; | |
| 56 break; | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 if (success) | |
| 61 testPassed("Buffer was played."); | |
| 62 else | |
| 63 testFailed("Buffer was not played."); | |
| 64 | |
| 65 finishJSTest(); | |
| 66 } | |
| 67 | |
| 68 runTest(); | |
| 69 successfullyParsed = true; | |
| 70 </script> | |
| 71 </body> | |
| 72 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
