test_delayNode.html (3475B)
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <title>Test DelayNode</title> 5 <script 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 var gTest = { 14 length: 4096, 15 numberOfChannels: 1, 16 createGraph(context) { 17 var delay = new DelayNode(context); 18 ok(delay.delayTime, "The audioparam member must exist"); 19 is(delay.delayTime.value, 0, "Correct initial value"); 20 is(delay.delayTime.defaultValue, 0, "Correct default value"); 21 delay.delayTime.value = 0.5; 22 is(delay.delayTime.value, 0.5, "Correct initial value"); 23 is(delay.delayTime.defaultValue, 0, "Correct default value"); 24 25 delay = new DelayNode(context, { delayTime: 0.5 }); 26 ok(delay.delayTime, "The audioparam member must exist"); 27 is(delay.delayTime.value, 0.5, "Correct initial value"); 28 is(delay.delayTime.defaultValue, 0, "Correct default value"); 29 30 var buffer = context.createBuffer(1, 2048, context.sampleRate); 31 for (var i = 0; i < 2048; ++i) { 32 buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); 33 } 34 35 var source = context.createBufferSource(); 36 37 delay = context.createDelay(); 38 39 source.buffer = buffer; 40 41 source.connect(delay); 42 43 ok(delay.delayTime, "The audioparam member must exist"); 44 is(delay.delayTime.value, 0, "Correct initial value"); 45 is(delay.delayTime.defaultValue, 0, "Correct default value"); 46 delay.delayTime.value = 0.5; 47 is(delay.delayTime.value, 0.5, "Correct initial value"); 48 is(delay.delayTime.defaultValue, 0, "Correct default value"); 49 is(delay.channelCount, 2, "delay node has 2 input channels by default"); 50 is(delay.channelCountMode, "max", "Correct channelCountMode for the delay node"); 51 is(delay.channelInterpretation, "speakers", "Correct channelCountInterpretation for the delay node"); 52 53 expectException(function() { 54 context.createDelay(0); 55 }, DOMException.NOT_SUPPORTED_ERR); 56 expectException(function() { 57 context.createDelay(180); 58 }, DOMException.NOT_SUPPORTED_ERR); 59 expectTypeError(function() { 60 context.createDelay(NaN); 61 }, DOMException.NOT_SUPPORTED_ERR); 62 expectException(function() { 63 context.createDelay(-1); 64 }, DOMException.NOT_SUPPORTED_ERR); 65 66 expectException(function() { 67 new DelayNode(context, { maxDelayTime: 0 }); 68 }, DOMException.NOT_SUPPORTED_ERR); 69 expectException(function() { 70 new DelayNode(context, { maxDelayTime: 180 }); 71 }, DOMException.NOT_SUPPORTED_ERR); 72 expectTypeError(function() { 73 new DelayNode(context, { maxDelayTime: NaN }); 74 }, DOMException.NOT_SUPPORTED_ERR); 75 expectException(function() { 76 new DelayNode(context, { maxDelayTime: -1 }); 77 }, DOMException.NOT_SUPPORTED_ERR); 78 79 context.createDelay(1); // should not throw 80 81 // Delay the source stream by 2048 frames 82 delay.delayTime.value = 2048 / context.sampleRate; 83 84 source.start(0); 85 return delay; 86 }, 87 createExpectedBuffers(context) { 88 var expectedBuffer = context.createBuffer(1, 2048 * 2, context.sampleRate); 89 for (var i = 2048; i < 2048 * 2; ++i) { 90 expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i - 2048) / context.sampleRate); 91 } 92 return expectedBuffer; 93 }, 94 }; 95 96 runTest(); 97 98 </script> 99 </pre> 100 </body> 101 </html>