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comparison: content/media/webaudio/test/test_mediaElementAudioSourceNode.html
content/media/webaudio/test/test_mediaElementAudioSourceNode.html
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| -1:000000000000 | 0:b2eab74511d4 |
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| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <meta charset="utf-8"> | |
| 4 <head> | |
| 5 <title>Test MediaElementAudioSourceNode</title> | |
| 6 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> | |
| 7 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> | |
| 8 </head> | |
| 9 <body> | |
| 10 <pre id="test"> | |
| 11 <script class="testbody" type="text/javascript"> | |
| 12 SimpleTest.waitForExplicitFinish(); | |
| 13 | |
| 14 function test() { | |
| 15 var audio = new Audio("small-shot.ogg"); | |
| 16 var context = new AudioContext(); | |
| 17 var node = context.createMediaElementSource(audio); | |
| 18 var sp = context.createScriptProcessor(2048, 1); | |
| 19 node.connect(sp); | |
| 20 var expectedMinNonzeroSampleCount; | |
| 21 var expectedMaxNonzeroSampleCount; | |
| 22 var nonzeroSampleCount = 0; | |
| 23 var complete = false; | |
| 24 var iterationCount = 0; | |
| 25 | |
| 26 // This test ensures we receive at least expectedSampleCount nonzero samples | |
| 27 function processSamples(e) { | |
| 28 if (complete) { | |
| 29 return; | |
| 30 } | |
| 31 | |
| 32 if (iterationCount == 0) { | |
| 33 // Don't start playing the audio until the AudioContext stuff is connected | |
| 34 // and running. | |
| 35 audio.play(); | |
| 36 } | |
| 37 ++iterationCount; | |
| 38 | |
| 39 var buf = e.inputBuffer.getChannelData(0); | |
| 40 var nonzeroSamplesThisBuffer = 0; | |
| 41 for (var i = 0; i < buf.length; ++i) { | |
| 42 if (buf[i] != 0) { | |
| 43 ++nonzeroSamplesThisBuffer; | |
| 44 } | |
| 45 } | |
| 46 nonzeroSampleCount += nonzeroSamplesThisBuffer; | |
| 47 is(e.inputBuffer.numberOfChannels, 1, | |
| 48 "Checking data channel count (nonzeroSamplesThisBuffer=" + | |
| 49 nonzeroSamplesThisBuffer + ")"); | |
| 50 ok(nonzeroSampleCount <= expectedMaxNonzeroSampleCount, | |
| 51 "Too many nonzero samples (got " + nonzeroSampleCount + ", expected max " + expectedMaxNonzeroSampleCount + ")"); | |
| 52 if (nonzeroSampleCount >= expectedMinNonzeroSampleCount && | |
| 53 nonzeroSamplesThisBuffer == 0) { | |
| 54 ok(true, | |
| 55 "Check received enough nonzero samples (got " + nonzeroSampleCount + ", expected min " + expectedMinNonzeroSampleCount + ")"); | |
| 56 SimpleTest.finish(); | |
| 57 complete = true; | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 audio.oncanplaythrough = function() { | |
| 62 // Use a fuzz factor of 100 to account for samples that just happen to be zero | |
| 63 expectedMinNonzeroSampleCount = Math.floor(audio.duration*context.sampleRate) - 100; | |
| 64 expectedMaxNonzeroSampleCount = Math.floor(audio.duration*context.sampleRate) + 500; | |
| 65 sp.onaudioprocess = processSamples; | |
| 66 }; | |
| 67 } | |
| 68 | |
| 69 SpecialPowers.pushPrefEnv({"set": [["media.preload.default", 2], ["media.preload.auto", 3]]}, test); | |
| 70 | |
| 71 </script> | |
| 72 </pre> | |
| 73 </body> | |
| 74 </html> |
