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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /streams/transferable/audioworklet.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<meta charset="utf-8">
<title>Transferring streams to an AudioWorkletProcessor</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
async function createProcessorPort(t) {
const context = new AudioContext();
t.add_cleanup(() => context.close());
await context.audioWorklet.addModule('resources/audioworklet-stream-processor.js');
return new AudioWorkletNode(context, 'stream-processor').port;
}
async function transfer(t, kind, stream) {
const port = await createProcessorPort(t);
const response = new Promise(resolve => port.onmessage = e => resolve(e.data));
port.postMessage({ kind, stream }, [stream]);
assert_true(kind === 'transform' ? stream.readable.locked : stream.locked, 'the original stream is locked');
const data = await response;
assert_equals(data.error, undefined, 'no error in the worklet');
return data.result;
}
promise_test(async t => {
const stream = new ReadableStream({
start(controller) {
controller.enqueue('chunk to the worklet');
}
});
assert_equals(await transfer(t, 'readable', stream), 'chunk to the worklet');
}, 'A ReadableStream can be transferred to an AudioWorkletProcessor');
promise_test(async t => {
const chunks = [];
let closed;
const sinkClosed = new Promise(resolve => closed = resolve);
const stream = new WritableStream({
write(chunk) {
chunks.push(chunk);
},
close() {
closed();
}
});
assert_equals(await transfer(t, 'writable', stream), 'written');
await sinkClosed;
assert_array_equals(chunks, ['chunk from the worklet']);
}, 'A WritableStream can be transferred to an AudioWorkletProcessor');
promise_test(async t => {
assert_equals(await transfer(t, 'transform', new TransformStream()), 'chunk through the worklet');
}, 'A TransformStream can be transferred to an AudioWorkletProcessor');
</script>