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<!doctype html>
<html>
<head>
<meta charset=utf-8>
<title>Missing scheme information box in protected sample entry</title>
<link rel="help" href="https://w3c.github.io/encrypted-media/">
<!-- Web Platform Test Harness scripts -->
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<!-- Content metadata -->
<script src=/encrypted-media/content/content-metadata.js></script>
</head>
<body>
<div id='log'></div>
<div id='audio'>
<audio id="audioelement" width="200px"></video>
</div>
</body>
<script>
const contentItem = content['mp4-av-multikey'];
const audio = document.getElementById('audioelement');
// Test that a non conforming mp4 protected sample entry triggers the append
// error algorithm.
// https://w3c.github.io/media-source/#sourcebuffer-segment-parser-loop
// 2. If the [[input buffer]] contains bytes that violate the SourceBuffer
// byte stream format specification, then run the append error algorithm and
// abort this algorithm.
promise_test(async t => {
audio.watcher = new EventWatcher(t, audio, ['error']);
const response = await fetch(contentItem.audio.path);
assert_true(response.ok, 'response.ok');
const audioMedia = new Uint8Array(await response.arrayBuffer());
const source = new MediaSource();
source.watcher = new EventWatcher(t, source, ['sourceopen']);
audio.src = URL.createObjectURL(source);
await source.watcher.wait_for('sourceopen');
const mediaType = contentItem.audio.type;
assert_implements_optional(MediaSource.isTypeSupported(mediaType),
`${mediaType} supported`);
const buffer = source.addSourceBuffer(mediaType);
buffer.watcher = new EventWatcher(t, buffer, ['error', 'updateend']);
// ISO/IEC 14496-12:2015(E)
// 8.12.1 Protection Scheme Information Box
// 8.12.1.1 Definition
// "At least one protection scheme information box must occur in a protected
// sample entry."
//
// Change the 'sinf' box type to 'sin ' so that there is no protection
// scheme information box in the protected sample entry.
// 4-byte offset for the `type` field after `size` and 3 bytes to index the
// last character of the type.
audioMedia[contentItem.audio.sinfStart + 4 + 3] = ' '.charCodeAt();
buffer.appendBuffer(audioMedia);
await Promise.all([
buffer.watcher.wait_for(['error', 'updateend']),
audio.watcher.wait_for('error'),
]);
}, 'missing-sinf');
</script>
</html>
|
