| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| <html> |
| <head> |
| <script src="../resources/js-test.js"></script> |
| <script src="resources/compatibility.js"></script> |
| <script src="resources/audio-testing.js"></script> |
| </head> |
| |
| <body> |
| <div id="description"></div> |
| <div id="console"></div> |
| |
| <script> |
| description("Test AnalyserNode getFloatTimeDomainData"); |
| |
| var sampleRate = 44100; |
| // Render length and FFT length. Hence this must be a power of two. |
| var sampleFrameLength = 2048; |
| |
| var src; |
| var analyser; |
| var renderedData; |
| |
| function checkResult() { |
| var fftSize = analyser.fftSize; |
| renderedData = new Float32Array(fftSize); |
| analyser.getFloatTimeDomainData(renderedData); |
| |
| var trueData = src.buffer.getChannelData(0); |
| var success = true; |
| |
| // Verify that the received time domain data is exactly equal to the actual time domain |
| // data. This is true only because the render length and FFT size are the same. |
| for (k = 0; k < fftSize; ++k) { |
| if (trueData[k] != renderedData[k]) { |
| testFailed("Data mismatch at index " + k |
| + ". Expected " + trueData[k] |
| + " but got " + renderedData[k] |
| + "."); |
| success = false; |
| break; |
| } |
| } |
| |
| if (success) { |
| testPassed("Received expected float time domain data."); |
| } else { |
| testFailed("Received float time domain data did not match expected result."); |
| } |
| |
| finishJSTest(); |
| } |
| |
| function runTests() { |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| window.jsTestIsAsync = true; |
| |
| context = new OfflineAudioContext(1, sampleFrameLength, sampleRate); |
| |
| // Use a simple linear ramp as the source. |
| src = context.createBufferSource(); |
| src.buffer = createLinearRampBuffer(context, sampleFrameLength); |
| |
| analyser = context.createAnalyser(); |
| analyser.fftSize = sampleFrameLength; |
| |
| src.connect(analyser); |
| analyser.connect(context.destination); |
| src.start(); |
| |
| context.oncomplete = checkResult; |
| context.startRendering(); |
| } |
| |
| runTests(); |
| successfullyParsed = true; |
| </script> |
| </body> |
| </html> |
