| <!DOCTYPE html> |
| <html> |
| <head> |
| <script src="resources/audio-testing.js"></script> |
| <script src="resources/audiobuffersource-testing-legacy.js"></script> |
| <script src="../resources/js-test.js"></script> |
| </head> |
| <body> |
| <script> |
| description("Tests AudioBufferSourceNode starts immediately if the `when` value passed to start() is in the past."); |
| jsTestIsAsync = true; |
| |
| const numberOfFrames = 256; |
| const sourceBufferSize = numberOfFrames / 2; |
| const sampleRate = 44100.; |
| |
| let context = new OfflineAudioContext(1, numberOfFrames, sampleRate); |
| let source = null; |
| |
| function createSourceNode() |
| { |
| if (source) { |
| source.disconnect(); |
| source.stop(); |
| } |
| source = context.createBufferSource(); |
| source.buffer = createTestBuffer(context, numberOfFrames / 2); |
| source.loop = true; |
| source.connect(context.destination); |
| source.start(0, 0, sourceBufferSize / sampleRate); |
| } |
| |
| function convertToRegularJSArray(data, offset, count) |
| { |
| let array = new Array(); |
| let outputIndex = 0; |
| for (let i = offset; i < offset + count; ++i) |
| array[outputIndex++] = data[i]; |
| return array; |
| } |
| |
| context.suspend(sourceBufferSize / sampleRate).then(() => { |
| createSourceNode(); |
| context.resume(); |
| }); |
| createSourceNode(); |
| context.startRendering().then((renderBuffer) => { |
| let renderedData = renderBuffer.getChannelData(0); |
| let expectedData = source.buffer.getChannelData(0); |
| let success = true; |
| for (var i = 0; i < expectedData.length; ++i) { |
| if (expectedData[i] != renderedData[i]) { |
| var s = "First half: expected: " + convertToRegularJSArray(expectedData, 0, sourceBufferSize) + " actual: " + convertToRegularJSArray(renderedData, 0, sourceBufferSize); |
| testFailed(s); |
| success = false; |
| break; |
| } |
| } |
| if (success) |
| testPassed("First half of the rendered data is identical to the source buffer"); |
| |
| success = true; |
| for (var i = 0; i < expectedData.length; ++i) { |
| if (expectedData[i] != renderedData[sourceBufferSize + i]) { |
| var s = "Second half: expected: " + convertToRegularJSArray(expectedData, 0, sourceBufferSize) + " actual: " + convertToRegularJSArray(renderedData, sourceBufferSize, sourceBufferSize); |
| testFailed(s); |
| success = false; |
| break; |
| } |
| } |
| if (success) |
| testPassed("Second half of the rendered data is identical to the source buffer as well"); |
| |
| finishJSTest(); |
| }); |
| </script> |
| </body> |
| </html> |
