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Diffstat (limited to 'testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/simple-input-output.https.html')
-rw-r--r-- | testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/simple-input-output.https.html | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/simple-input-output.https.html b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/simple-input-output.https.html new file mode 100644 index 0000000000..7b9e7f0ac3 --- /dev/null +++ b/testing/web-platform/tests/webaudio/the-audio-api/the-audioworklet-interface/simple-input-output.https.html @@ -0,0 +1,90 @@ +<!DOCTYPE html> +<html> + <head> + <title>Test Simple AudioWorklet I/O</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> + // Arbitrary sample rate + const sampleRate = 48000; + + // The offset to be applied by the worklet to its inputs. + const offset = 1; + + // Location of the worklet's code + const filePath = 'processors/add-offset.js'; + + let audit = Audit.createTaskRunner(); + + // Context to be used for the tests. + let context; + + audit.define('Initialize worklet', (task, should) => { + // Two channels for testing. Channel 0 is the output of the + // AudioWorklet. Channel 1 is the oscillator so we can compare + // the outputs. + context = new OfflineAudioContext( + {numberOfChannels: 2, length: sampleRate, sampleRate: sampleRate}); + + // Load up the code for the worklet. + should( + context.audioWorklet.addModule(filePath), + 'Creation of AudioWorklet') + .beResolved() + .then(() => task.done()); + }); + + audit.define( + {label: 'test', description: 'Simple AudioWorklet I/O'}, + (task, should) => { + let merger = new ChannelMergerNode( + context, {numberOfChannels: context.destination.channelCount}); + merger.connect(context.destination); + + let src = new OscillatorNode(context); + + let worklet = new AudioWorkletNode( + context, 'add-offset-processor', + {processorOptions: {offset: offset}}); + + src.connect(worklet).connect(merger, 0, 0); + src.connect(merger, 0, 1); + + // Start and stop the source. The stop time is fairly arbitrary, + // but use a render quantum boundary for simplicity. + const stopFrame = RENDER_QUANTUM_FRAMES; + src.start(0); + src.stop(stopFrame / context.sampleRate); + + context.startRendering() + .then(buffer => { + let ch0 = buffer.getChannelData(0); + let ch1 = buffer.getChannelData(1); + + let shifted = ch1.slice(0, stopFrame).map(x => x + offset); + + // The initial part of the output should be the oscillator + // shifted by |offset|. + should( + ch0.slice(0, stopFrame), + `AudioWorklet output[0:${stopFrame - 1}]`) + .beCloseToArray(shifted, {absoluteThreshold: 0}); + + // Output should be constant after the source has stopped. + should( + ch0.slice(stopFrame), + `AudioWorklet output[${stopFrame}:]`) + .beConstantValueOf(offset); + }) + .then(() => task.done()); + }); + + audit.run(); + </script> + </body> +</html> |