| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| |
| <!-- |
| Create an oscillator of each type and verify that the type is set correctly. |
| --> |
| <html> |
| <head> |
| <script src="resources/compatibility.js"></script> |
| <script type="text/javascript" src="resources/audio-testing.js"></script> |
| <script type="text/javascript" src="../resources/js-test.js"></script> |
| </head> |
| |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| |
| <script> |
| description("Basic test of setting Oscillator node types."); |
| |
| var sampleRate = 44100; |
| var renderLengthSeconds = 0.25; |
| |
| var oscTypes = ["sine", "square", "sawtooth", "triangle", "custom"]; |
| |
| function runTest() |
| { |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| window.jsTestIsAsync = true; |
| |
| // Create offline audio context. |
| var context = new OfflineAudioContext(2, sampleRate * renderLengthSeconds, sampleRate); |
| var osc = context.createOscillator(); |
| |
| // Set each possible oscillator type (except CUSTOM) and verify that the type is correct. |
| // Here we're setting the type using WebIDL enum values which are strings. |
| for (var k = 0; k < oscTypes.length - 1; ++k) { |
| osc.type = oscTypes[k]; |
| Should("osc.type = '" + oscTypes[k] + "'", osc.type).beEqualTo(oscTypes[k]); |
| } |
| |
| // Verify that setting a custom type directly does not set the custom type. This test has to be |
| // done before using setPeriodicWave. |
| |
| Should("osc.type = 'custom'", function () { |
| osc.type = "custom"; |
| }).throw('InvalidStateError'); |
| |
| // Now set a custom oscillator |
| var coeffA = new Float32Array([0, 1, 0.5]); |
| var coeffB = new Float32Array([0, 0, 0]); |
| var wave = context.createPeriodicWave(coeffA, coeffB); |
| |
| Should("osc.setPeriodicWave(wave)", function () { |
| osc.setPeriodicWave(wave); |
| }).notThrow(); |
| Should("osc.type", osc.type).beEqualTo("custom"); |
| |
| // Check that numerical values are no longer supported |
| var oldType = osc.type; |
| osc.type = 0; |
| Should("osc.type = 0", osc.type).notBeEqualTo(0); |
| Should("osc.type", osc.type).beEqualTo(oldType); |
| |
| finishJSTest(); |
| } |
| |
| runTest(); |
| successfullyParsed = true; |
| |
| </script> |
| |
| |
| </body> |
| </html> |
