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comparison: content/media/webaudio/test/test_AudioBuffer.html
content/media/webaudio/test/test_AudioBuffer.html
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:8fbbbe7a5406 |
|---|---|
| 1 <!DOCTYPE HTML> | |
| 2 <html> | |
| 3 <head> | |
| 4 <title>Test whether we can create an AudioContext interface</title> | |
| 5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> | |
| 6 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> | |
| 7 </head> | |
| 8 <body> | |
| 9 <pre id="test"> | |
| 10 <script src="webaudio.js" type="text/javascript"></script> | |
| 11 <script class="testbody" type="text/javascript"> | |
| 12 | |
| 13 SimpleTest.waitForExplicitFinish(); | |
| 14 addLoadEvent(function() { | |
| 15 var context = new AudioContext(); | |
| 16 var buffer = context.createBuffer(2, 2048, context.sampleRate); | |
| 17 SpecialPowers.gc(); // Make sure that our channels are accessible after GC | |
| 18 ok(buffer, "Buffer was allocated successfully"); | |
| 19 is(buffer.sampleRate, context.sampleRate, "Correct sample rate"); | |
| 20 is(buffer.length, 2048, "Correct length"); | |
| 21 ok(Math.abs(buffer.duration - 2048 / context.sampleRate) < 0.0001, "Correct duration"); | |
| 22 is(buffer.numberOfChannels, 2, "Correct number of channels"); | |
| 23 for (var i = 0; i < buffer.numberOfChannels; ++i) { | |
| 24 var buf = buffer.getChannelData(i); | |
| 25 ok(buf, "Buffer index " + i + " exists"); | |
| 26 ok(buf instanceof Float32Array, "Result is a typed array"); | |
| 27 is(buf.length, buffer.length, "Correct length"); | |
| 28 var foundNonZero = false; | |
| 29 for (var j = 0; j < buf.length; ++j) { | |
| 30 if (buf[j] != 0) { | |
| 31 foundNonZero = true; | |
| 32 break; | |
| 33 } | |
| 34 buf[j] = j; | |
| 35 } | |
| 36 ok(!foundNonZero, "Buffer " + i + " should be initialized to 0"); | |
| 37 } | |
| 38 | |
| 39 // Now test copying the channel data out of a normal buffer | |
| 40 var copy = new Float32Array(100); | |
| 41 buffer.copyFromChannel(copy, 0, 1024); | |
| 42 for (var i = 0; i < copy.length; ++i) { | |
| 43 is(copy[i], 1024 + i, "Correct sample"); | |
| 44 } | |
| 45 | |
| 46 // Test copying the channel data out of a playing buffer | |
| 47 var srcNode = context.createBufferSource(); | |
| 48 srcNode.buffer = buffer; | |
| 49 srcNode.start(0); | |
| 50 copy = new Float32Array(100); | |
| 51 buffer.copyFromChannel(copy, 0, 1024); | |
| 52 for (var i = 0; i < copy.length; ++i) { | |
| 53 is(copy[i], 1024 + i, "Correct sample"); | |
| 54 } | |
| 55 | |
| 56 // Test copying to the channel data | |
| 57 var newData = new Float32Array(200); | |
| 58 buffer.copyToChannel(newData, 0, 100); | |
| 59 var changedData = buffer.getChannelData(0); | |
| 60 for (var i = 0; i < changedData.length; ++i) { | |
| 61 if (i < 100 || i >= 300) { | |
| 62 is(changedData[i], i, "Untouched sample"); | |
| 63 } else { | |
| 64 is(changedData[i], 0, "Correct sample"); | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 // Now, neuter the array buffer | |
| 69 var worker = new Worker("audioBufferSourceNodeNeutered_worker.js"); | |
| 70 var data = buffer.getChannelData(0).buffer; | |
| 71 worker.postMessage(data, [data]); | |
| 72 SpecialPowers.gc(); | |
| 73 | |
| 74 expectException(function() { | |
| 75 buffer.copyFromChannel(copy, 0, 1024); | |
| 76 }, DOMException.INDEX_SIZE_ERR); | |
| 77 | |
| 78 expectException(function() { | |
| 79 buffer.copyToChannel(newData, 0, 100); | |
| 80 }, DOMException.INDEX_SIZE_ERR); | |
| 81 | |
| 82 expectException(function() { | |
| 83 context.createBuffer(2, 2048, 7999); | |
| 84 }, DOMException.INDEX_SIZE_ERR); | |
| 85 expectException(function() { | |
| 86 context.createBuffer(2, 2048, 192001); | |
| 87 }, DOMException.INDEX_SIZE_ERR); | |
| 88 context.createBuffer(2, 2048, 8000); // no exception | |
| 89 context.createBuffer(2, 2048, 192000); // no exception | |
| 90 context.createBuffer(32, 2048, 48000); // no exception | |
| 91 // Null length | |
| 92 expectException(function() { | |
| 93 context.createBuffer(2, 0, 48000); | |
| 94 }, DOMException.INDEX_SIZE_ERR); | |
| 95 // Null number of channels | |
| 96 expectException(function() { | |
| 97 context.createBuffer(0, 2048, 48000); | |
| 98 }, DOMException.INDEX_SIZE_ERR); | |
| 99 SimpleTest.finish(); | |
| 100 }); | |
| 101 | |
| 102 </script> | |
| 103 </pre> | |
| 104 </body> | |
| 105 </html> |
