| This is a very basic test to make sure testRunner.setAudioResult() works correctly. |
| It generates a 2 seconds long stereo result @44.1KHz |
| The left channel will be a 880Hz tone, while the right will be 440Hz. |
| <script src="../resources/js-test.js"></script> |
| <script type="text/javascript" src="resources/audio-testing.js"></script> |
| <div id="description"></div> |
| description("Tests basic audio test infrastructure: specifically testRunner.setAudioResult()"); |
| var sampleRate = 44100.0; |
| function generateSinWave(audioBuffer) { |
| var n = audioBuffer.length; |
| var channelL = audioBuffer.getChannelData(0); |
| var channelR = audioBuffer.getChannelData(1); |
| var sampleRate = audioBuffer.sampleRate; |
| for (var i = 0; i < n; ++i) { |
| channelL[i] = Math.sin(880.0 * 2.0*Math.PI * i / sampleRate); |
| channelR[i] = Math.sin(440.0 * 2.0*Math.PI * i / sampleRate); |
| var context = new webkitAudioContext(); |
| var audioBuffer = context.createBuffer(2, lengthInSeconds * sampleRate, sampleRate); |
| generateSinWave(audioBuffer); |
| var audioData = createAudioData(audioBuffer); |
| testRunner.setAudioResult(audioData); |