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Diffstat (limited to 'testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/audioworkletnode-disconnected-input.https.html')
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diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/audioworkletnode-disconnected-input.https.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/audioworkletnode-disconnected-input.https.html new file mode 100644 index 0000000000..c58502af01 --- /dev/null +++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/audioworkletnode-disconnected-input.https.html @@ -0,0 +1,100 @@ +<!DOCTYPE html> +<html> + <head> + <title> + Test AudioWorkletNode's Disconnected Input Array Length + </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"> + let audit = Audit.createTaskRunner(); + + // Arbitrary numbers used to align the test with render quantum boundary. + // The sample rate is a power of two to eliminate roundoff in computing + // the suspend time needed for the test. + let sampleRate = 16384; + let renderLength = 8 * RENDER_QUANTUM_FRAMES; + let context; + + let filePath = 'processors/input-length-processor.js'; + + let testChannelValues = [1, 2, 3]; + + // Creates a 3-channel buffer and play with BufferSourceNode. The source + // goes through a bypass AudioWorkletNode (gain value of 1). + audit.define( + { + label: 'test', + description: + 'Input array length should be zero for disconnected input' + }, + (task, should) => { + context = new OfflineAudioContext({ + numberOfChannels: 1, + length: renderLength, + sampleRate: sampleRate + }); + + context.audioWorklet.addModule(filePath).then(() => { + let sourceNode = new ConstantSourceNode(context); + let workletNode = + new AudioWorkletNode(context, 'input-length-processor'); + + workletNode.connect(context.destination); + + // Connect the source now. + let connectFrame = RENDER_QUANTUM_FRAMES; + + context.suspend(connectFrame / sampleRate) + .then(() => { + sourceNode.connect(workletNode); + }) + .then(() => context.resume()); + ; + + // Then disconnect the source after a few renders + let disconnectFrame = 3 * RENDER_QUANTUM_FRAMES; + context.suspend(disconnectFrame / sampleRate) + .then(() => { + sourceNode.disconnect(workletNode); + }) + .then(() => context.resume()); + + sourceNode.start(); + context.startRendering() + .then(resultBuffer => { + let data = resultBuffer.getChannelData(0); + + should( + data.slice(0, connectFrame), + 'Before connecting the source: Input array length') + .beConstantValueOf(0); + + // Find where the output is no longer 0. + let nonZeroIndex = data.findIndex(x => x > 0); + should(nonZeroIndex, 'First non-zero output') + .beEqualTo(connectFrame); + + should( + data.slice( + nonZeroIndex, + nonZeroIndex + (disconnectFrame - connectFrame)), + 'While source is connected: Input array length') + .beConstantValueOf(RENDER_QUANTUM_FRAMES); + should( + data.slice(disconnectFrame), + 'After disconnecting the source: Input array length') + .beConstantValueOf(0); + }) + .then(() => task.done()); + }); + }); + + audit.run(); + </script> + </body> +</html> |