<!DOCTYPE HTML> <html> <head> <title>Test DelayNode</title> <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> </head> <body> <pre id="test"> <script src="webaudio.js" type="text/javascript"></script> <script class="testbody" type="text/javascript"> var gTest = { length: 4096, numberOfChannels: 1, createGraph: function(context) { var buffer = context.createBuffer(1, 2048, context.sampleRate); for (var i = 0; i < 2048; ++i) { buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate); } var source = context.createBufferSource(); var delay = context.createDelay(); source.buffer = buffer; source.connect(delay); ok(delay.delayTime, "The audioparam member must exist"); is(delay.delayTime.value, 0, "Correct initial value"); is(delay.delayTime.defaultValue, 0, "Correct default value"); delay.delayTime.value = 0.5; is(delay.delayTime.value, 0.5, "Correct initial value"); is(delay.delayTime.defaultValue, 0, "Correct default value"); is(delay.channelCount, 2, "delay node has 2 input channels by default"); is(delay.channelCountMode, "max", "Correct channelCountMode for the delay node"); is(delay.channelInterpretation, "speakers", "Correct channelCountInterpretation for the delay node"); expectException(function() { context.createDelay(0); }, DOMException.NOT_SUPPORTED_ERR); expectException(function() { context.createDelay(180); }, DOMException.NOT_SUPPORTED_ERR); expectTypeError(function() { context.createDelay(NaN); }, DOMException.NOT_SUPPORTED_ERR); expectException(function() { context.createDelay(-1); }, DOMException.NOT_SUPPORTED_ERR); context.createDelay(1); // should not throw // Delay the source stream by 2048 frames delay.delayTime.value = 2048 / context.sampleRate; source.start(0); return delay; }, createExpectedBuffers: function(context) { var expectedBuffer = context.createBuffer(1, 2048 * 2, context.sampleRate); for (var i = 2048; i < 2048 * 2; ++i) { expectedBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i - 2048) / context.sampleRate); } return expectedBuffer; }, }; runTest(); </script> </pre> </body> </html>