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| 1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> | |
| 2 <html> | |
| 3 <head> | |
| 4 <script src="../resources/js-test.js"></script> | |
| 5 <script src="resources/compatibility.js"></script> | |
| 6 <script src="resources/audit-util.js"></script> | |
| 7 <script src="resources/audio-testing.js"></script> | |
| 8 <script src="resources/note-grain-on-testing.js"></script> | |
| 9 </head> | |
| 10 | |
| 11 <body> | |
| 12 <div id="description"></div> | |
| 13 <div id="console"></div> | |
| 14 | |
| 15 <script> | |
| 16 description("Test noteGrainOn offset rendering."); | |
| 17 | |
| 18 // To test noteGrainOn, a single ramp signal is created. | |
| 19 // Various sections of the ramp are rendered by noteGrainOn() at | |
| 20 // different times, and we verify that the actual output | |
| 21 // consists of the correct section of the ramp at the correct | |
| 22 // time. | |
| 23 | |
| 24 var linearRampBuffer; | |
| 25 | |
| 26 // Array of the grain offset used for each ramp played. | |
| 27 var grainOffsetTime = []; | |
| 28 | |
| 29 // Verify the received signal is a ramp from the correct section | |
| 30 // of our ramp signal. | |
| 31 function verifyGrain(renderedData, startFrame, endFrame, grainIndex) { | |
| 32 var grainOffsetFrame = timeToSampleFrame(grainOffsetTime[grainIndex],
sampleRate); | |
| 33 var grainFrameLength = endFrame - startFrame; | |
| 34 var ramp = linearRampBuffer.getChannelData(0); | |
| 35 var isCorrect = true; | |
| 36 | |
| 37 var expected; | |
| 38 var actual; | |
| 39 var frame; | |
| 40 | |
| 41 for (var k = 0; k < grainFrameLength; ++k) { | |
| 42 if (renderedData[startFrame + k] != ramp[grainOffsetFrame + k]) { | |
| 43 expected = ramp[grainOffsetFrame + k]; | |
| 44 actual = renderedData[startFrame + k]; | |
| 45 frame = startFrame + k; | |
| 46 isCorrect = false; | |
| 47 break; | |
| 48 } | |
| 49 } | |
| 50 return { verified: isCorrect, | |
| 51 expected : expected , | |
| 52 actual : actual, | |
| 53 frame : frame }; | |
| 54 } | |
| 55 | |
| 56 function checkResult(event) { | |
| 57 var buffer = event.renderedBuffer; | |
| 58 renderedData = buffer.getChannelData(0); | |
| 59 var nSamples = renderedData.length; | |
| 60 | |
| 61 var success = true; | |
| 62 | |
| 63 // Number of grains that we found that have incorrect data. | |
| 64 var invalidGrainDataCount = 0; | |
| 65 | |
| 66 var startEndFrames = findStartAndEndSamples(renderedData); | |
| 67 | |
| 68 // Verify the start and stop times. Not strictly needed for | |
| 69 // this test, but it's useful to know that if the ramp data | |
| 70 // appears to be incorrect. | |
| 71 success = success && verifyStartAndEndFrames(startEndFrames); | |
| 72 | |
| 73 // Loop through each of the rendered grains and check that | |
| 74 // each grain contains our expected ramp. | |
| 75 for (var k = 0; k < startEndFrames.start.length; ++k) { | |
| 76 // Verify that the rendered data matches the expected | |
| 77 // section of our ramp signal. | |
| 78 var result = verifyGrain(renderedData, startEndFrames.start[k], st
artEndFrames.end[k], k); | |
| 79 | |
| 80 if (!result.verified) { | |
| 81 testFailed("Grain " + k + " incorrect. Expected " + result.ex
pected + " but received " + result.actual + " at sample frame " + result.frame); | |
| 82 ++invalidGrainDataCount; | |
| 83 success = false; | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 if (!invalidGrainDataCount) { | |
| 88 testPassed("All " + numberOfTests + " grains contained the correct
data."); | |
| 89 } else { | |
| 90 testFailed(invalidGrainDataCount + " grains out of " + numberOfTes
ts + " did not contain the expected data."); | |
| 91 success = false; | |
| 92 } | |
| 93 | |
| 94 if (success) { | |
| 95 testPassed("noteGrainOn offset rendering tests passed."); | |
| 96 } else { | |
| 97 testFailed("noteGrainOn offset rendering tests failed."); | |
| 98 } | |
| 99 | |
| 100 finishJSTest(); | |
| 101 } | |
| 102 | |
| 103 function runTest() { | |
| 104 if (window.testRunner) { | |
| 105 testRunner.dumpAsText(); | |
| 106 testRunner.waitUntilDone(); | |
| 107 } | |
| 108 | |
| 109 window.jsTestIsAsync = true; | |
| 110 | |
| 111 // Create offline audio context. | |
| 112 context = new OfflineAudioContext(2, sampleRate * renderTime, sampleRa
te); | |
| 113 | |
| 114 // Create a linear ramp for testing noteGrainOn. | |
| 115 linearRampBuffer = createSignalBuffer(context, | |
| 116 function(k) { | |
| 117 // Want the ramp to start | |
| 118 // with 1, not 0. | |
| 119 return k + 1; | |
| 120 }); | |
| 121 | |
| 122 var grainInfo = playAllGrains(context, linearRampBuffer, numberOfTests
); | |
| 123 | |
| 124 grainOffsetTime = grainInfo.grainOffsetTimes; | |
| 125 | |
| 126 context.oncomplete = checkResult; | |
| 127 context.startRendering(); | |
| 128 } | |
| 129 | |
| 130 runTest(); | |
| 131 successfullyParsed = true; | |
| 132 | |
| 133 </script> | |
| 134 | |
| 135 </body> | |
| 136 </html> | |
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Chromium Code Reviews
Issue 2581463002:
Refactor WebAudio test directory (Closed)
