The Tor Browser / file comparison
comparison: content/media/webaudio/test/test_waveDecoder.html
content/media/webaudio/test/test_waveDecoder.html
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:e8e5a664765f |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <meta charset=utf-8> | |
| 4 <head> | |
| 5 <title>Test that we decode uint8 and sint16 wave files with correct conversion to float64</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 var testsDone = 0; | |
| 13 var tests = ["UklGRjUrAABXQVZFZm10IBAAAAABAAEAESsAABErAAABAAgAZGF0YQMAAAD/AIA=", | |
| 14 "UklGRkZWAABXQVZFZm10IBAAAAABAAEAESsAACJWAAACABAAZGF0YQYAAAD/fwCAAAA="]; | |
| 15 | |
| 16 SimpleTest.waitForExplicitFinish(); | |
| 17 | |
| 18 function base64ToUint8Buffer(b64) { | |
| 19 var str = atob(b64) | |
| 20 var u8 = new Uint8Array(str.length); | |
| 21 for (var i = 0; i < str.length; ++i) { | |
| 22 u8[i] = str.charCodeAt(i); | |
| 23 } | |
| 24 return u8; | |
| 25 } | |
| 26 | |
| 27 function fixupBufferSampleRate(u8, rate) { | |
| 28 u8[24] = (rate & 0x000000ff) >> 0; | |
| 29 u8[25] = (rate & 0x0000ff00) >> 8; | |
| 30 u8[26] = (rate & 0x00ff0000) >> 16; | |
| 31 u8[27] = (rate & 0xff000000) >> 24; | |
| 32 } | |
| 33 | |
| 34 function finishTest() { | |
| 35 testsDone += 1; | |
| 36 if (testsDone == tests.length) { | |
| 37 SimpleTest.finish(); | |
| 38 } | |
| 39 } | |
| 40 | |
| 41 function decodeComplete(b) { | |
| 42 ok(true, "Decoding succeeded."); | |
| 43 is(b.numberOfChannels, 1, "Should have 1 channel."); | |
| 44 is(b.length, 3, "Should have three samples."); | |
| 45 var samples = b.getChannelData(0); | |
| 46 ok(samples[0] > 0.99 && samples[0] < 1.01, "Check near 1.0. Got " + samples[0]); | |
| 47 ok(samples[1] > -1.01 && samples[1] < -0.99, "Check near -1.0. Got " + samples[1]); | |
| 48 ok(samples[2] > -0.01 && samples[2] < 0.01, "Check near 0.0. Got " + samples[2]); | |
| 49 finishTest(); | |
| 50 } | |
| 51 | |
| 52 function decodeFailed() { | |
| 53 ok(false, "Decoding failed."); | |
| 54 finishTest(); | |
| 55 } | |
| 56 | |
| 57 addLoadEvent(function() { | |
| 58 var context = new AudioContext(); | |
| 59 | |
| 60 for (var i = 0; i < tests.length; ++i) { | |
| 61 var u8 = base64ToUint8Buffer(tests[i]); | |
| 62 fixupBufferSampleRate(u8, context.sampleRate); | |
| 63 context.decodeAudioData(u8.buffer, decodeComplete, decodeFailed); | |
| 64 } | |
| 65 }); | |
| 66 </script> | |
| 67 </pre> | |
| 68 </body> | |
| 69 </html> |
