decodeAudioData-oversized-resample.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-offlineaudiocontext-interface/decodeAudioData-oversized-resample.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset="utf-8">

<title>

  decodeAudioData rejects when the resampled length would exceed AudioBuffer.length

</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/webaudio/resources/flac-builder.js"></script>

<body>

<script>

// Decoding into an OfflineAudioContext whose rate is far above the source rate

// must reject: the fully-resampled result is longer than an AudioBuffer can

// represent. The Web Audio spec defines no truncation for this case, so

// decodeAudioData must reject with EncodingError.

const SRC_RATE = 8000;

const DEST_RATE = 768000;

const BLOCK = 65535;

const NFRAMES = 683;  // Chosen so the upsampled length is not representable.

const sampleCount = NFRAMES * BLOCK;

promise_test(t => {

  const flac = buildFlac({

    sampleRate: SRC_RATE,

    blockSize: BLOCK,

    frameCount: NFRAMES,

    totalSamples: sampleCount,

    channels: 1,

});

  const ctx = new OfflineAudioContext(1, 128, DEST_RATE);

  return promise_rejects_dom(

    t, "EncodingError", ctx.decodeAudioData(flac),

    "decodeAudioData must reject when the resampled length exceeds AudioBuffer.length");

}, "decodeAudioData rejects when the resampled length exceeds AudioBuffer.length");

</script>

</body>