| <!doctype html> |
| <html> |
| <head> |
| <title>Test Start Grain with Delayed Buffer Setting </title> |
| <script src="resources/compatibility.js"></script> |
| <script src="resources/audio-testing.js"></script> |
| <script src="../resources/js-test.js"></script> |
| </head> |
| |
| <body> |
| <script> |
| description("Test setting the source buffer after starting the grain"); |
| |
| var context; |
| var source; |
| var buffer; |
| var renderedData; |
| |
| var sampleRate = 44100; |
| |
| var testDurationSec = 1; |
| var testDurationSamples = testDurationSec * sampleRate; |
| var startTime = 0.9 * testDurationSec; |
| |
| function runTest() { |
| window.jsTestIsAsync = true; |
| |
| context = new OfflineAudioContext(1, testDurationSamples, sampleRate); |
| context.oncomplete = checkResult; |
| |
| buffer = createConstantBuffer(context, testDurationSamples, 1); |
| source = context.createBufferSource(); |
| source.connect(context.destination); |
| |
| // Start the source BEFORE we set the buffer. The grain offset and duration aren't |
| // important, as long as we specify some offset. |
| source.start(startTime, .1); |
| source.buffer = buffer; |
| |
| // Render it! |
| context.startRendering(); |
| } |
| |
| function checkResult(event) { |
| var success = false; |
| |
| renderedData = event.renderedBuffer.getChannelData(0); |
| |
| // Check that the rendered data is not all zeroes. Any non-zero data means the test |
| // passed. |
| var startFrame = Math.round(startTime * sampleRate); |
| for (k = 0; k < renderedData.length; ++k) { |
| if (renderedData[k]) { |
| success = true; |
| break; |
| } |
| } |
| |
| if (success) |
| testPassed("Buffer was played."); |
| else |
| testFailed("Buffer was not played."); |
| |
| finishJSTest(); |
| } |
| |
| runTest(); |
| successfullyParsed = true; |
| </script> |
| </body> |
| </html> |
