content/media/webaudio/test/test_waveDecoder.html@b8a032363ba2 (annotated)
content/media/webaudio/test/test_waveDecoder.html
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <meta charset=utf-8> |
| michael@0 | 4 | <head> |
| michael@0 | 5 | <title>Test that we decode uint8 and sint16 wave files with correct conversion to float64</title> |
| michael@0 | 6 | <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 7 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> |
| michael@0 | 8 | </head> |
| michael@0 | 9 | <body> |
| michael@0 | 10 | <pre id="test"> |
| michael@0 | 11 | <script class="testbody" type="text/javascript"> |
| michael@0 | 12 | var testsDone = 0; |
| michael@0 | 13 | var tests = ["UklGRjUrAABXQVZFZm10IBAAAAABAAEAESsAABErAAABAAgAZGF0YQMAAAD/AIA=", |
| michael@0 | 14 | "UklGRkZWAABXQVZFZm10IBAAAAABAAEAESsAACJWAAACABAAZGF0YQYAAAD/fwCAAAA="]; |
| michael@0 | 15 | |
| michael@0 | 16 | SimpleTest.waitForExplicitFinish(); |
| michael@0 | 17 | |
| michael@0 | 18 | function base64ToUint8Buffer(b64) { |
| michael@0 | 19 | var str = atob(b64) |
| michael@0 | 20 | var u8 = new Uint8Array(str.length); |
| michael@0 | 21 | for (var i = 0; i < str.length; ++i) { |
| michael@0 | 22 | u8[i] = str.charCodeAt(i); |
| michael@0 | 23 | } |
| michael@0 | 24 | return u8; |
| michael@0 | 25 | } |
| michael@0 | 26 | |
| michael@0 | 27 | function fixupBufferSampleRate(u8, rate) { |
| michael@0 | 28 | u8[24] = (rate & 0x000000ff) >> 0; |
| michael@0 | 29 | u8[25] = (rate & 0x0000ff00) >> 8; |
| michael@0 | 30 | u8[26] = (rate & 0x00ff0000) >> 16; |
| michael@0 | 31 | u8[27] = (rate & 0xff000000) >> 24; |
| michael@0 | 32 | } |
| michael@0 | 33 | |
| michael@0 | 34 | function finishTest() { |
| michael@0 | 35 | testsDone += 1; |
| michael@0 | 36 | if (testsDone == tests.length) { |
| michael@0 | 37 | SimpleTest.finish(); |
| michael@0 | 38 | } |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | function decodeComplete(b) { |
| michael@0 | 42 | ok(true, "Decoding succeeded."); |
| michael@0 | 43 | is(b.numberOfChannels, 1, "Should have 1 channel."); |
| michael@0 | 44 | is(b.length, 3, "Should have three samples."); |
| michael@0 | 45 | var samples = b.getChannelData(0); |
| michael@0 | 46 | ok(samples[0] > 0.99 && samples[0] < 1.01, "Check near 1.0. Got " + samples[0]); |
| michael@0 | 47 | ok(samples[1] > -1.01 && samples[1] < -0.99, "Check near -1.0. Got " + samples[1]); |
| michael@0 | 48 | ok(samples[2] > -0.01 && samples[2] < 0.01, "Check near 0.0. Got " + samples[2]); |
| michael@0 | 49 | finishTest(); |
| michael@0 | 50 | } |
| michael@0 | 51 | |
| michael@0 | 52 | function decodeFailed() { |
| michael@0 | 53 | ok(false, "Decoding failed."); |
| michael@0 | 54 | finishTest(); |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | addLoadEvent(function() { |
| michael@0 | 58 | var context = new AudioContext(); |
| michael@0 | 59 | |
| michael@0 | 60 | for (var i = 0; i < tests.length; ++i) { |
| michael@0 | 61 | var u8 = base64ToUint8Buffer(tests[i]); |
| michael@0 | 62 | fixupBufferSampleRate(u8, context.sampleRate); |
| michael@0 | 63 | context.decodeAudioData(u8.buffer, decodeComplete, decodeFailed); |
| michael@0 | 64 | } |
| michael@0 | 65 | }); |
| michael@0 | 66 | </script> |
| michael@0 | 67 | </pre> |
| michael@0 | 68 | </body> |
| michael@0 | 69 | </html> |
