| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| Test AudioWorkletNode's automatic pull feature |
| </title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/webaudio/resources/audit.js"></script> |
| <script src="/webaudio/resources/audit-util.js"></script> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| const audit = Audit.createTaskRunner(); |
| |
| // Arbitrary sample rate. Anything should work. |
| const sampleRate = 48000; |
| const renderLength = RENDER_QUANTUM_FRAMES * 2; |
| const channelCount = 1; |
| const filePath = 'processors/zero-output-processor.js'; |
| |
| const sourceOffset = 0.5; |
| |
| // Connect a constant source node to the zero-output AudioWorkletNode. |
| // Then verify if it captures the data correctly. |
| audit.define('setup-worklet', (task, should) => { |
| const context = |
| new OfflineAudioContext(channelCount, renderLength, sampleRate); |
| |
| context.audioWorklet.addModule(filePath).then(() => { |
| let testSource = |
| new ConstantSourceNode(context, { offset: sourceOffset }); |
| let zeroOutputWorkletNode = |
| new AudioWorkletNode(context, 'zero-output-processor', { |
| numberOfInputs: 1, |
| numberOfOutputs: 0, |
| processorOptions: { |
| bufferLength: renderLength, |
| channeCount: channelCount |
| } |
| }); |
| |
| // Start the source and stop at the first render quantum. |
| testSource.connect(zeroOutputWorkletNode); |
| testSource.start(); |
| testSource.stop(RENDER_QUANTUM_FRAMES/sampleRate); |
| |
| zeroOutputWorkletNode.port.onmessage = (event) => { |
| // The |capturedBuffer| can be multichannel. Iterate through it. |
| for (let i = 0; i < event.data.capturedBuffer.length; ++i) { |
| let buffer = event.data.capturedBuffer[i]; |
| // Split the captured buffer in half for the easier test. |
| should(buffer.subarray(0, RENDER_QUANTUM_FRAMES), |
| 'The first half of the captured buffer') |
| .beConstantValueOf(sourceOffset); |
| should(buffer.subarray(RENDER_QUANTUM_FRAMES, renderLength), |
| 'The second half of the captured buffer') |
| .beConstantValueOf(0); |
| } |
| task.done(); |
| }; |
| |
| // Starts the rendering, but we don't need the rendered buffer from |
| // the context. |
| context.startRendering(); |
| }); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
| |
