Bug 1566389 - Test that various mp3 files have exactly the correct duration. r=jya

Depends on D91773 Differential Revision: https://phabricator.services.mozilla.com/D91774
2020-10-05 13:12:35 +00:00 · 2020-10-05 13:12:35 +00:00 · efda27b066
--- a/dom/media/webaudio/test/half-a-second-48000.mp3
+++ b/dom/media/webaudio/test/half-a-second-48000.mp3
--- a/dom/media/webaudio/test/half-a-second-8000.mp3
+++ b/dom/media/webaudio/test/half-a-second-8000.mp3
--- a/dom/media/webaudio/test/mochitest.ini
+++ b/dom/media/webaudio/test/mochitest.ini
@ -31,6 +31,8 @@ support-files =
  ting-48k-1ch.wav
  ting-48k-2ch.wav
  sine-440-10s.opus
+  half-a-second-8000.mp3
+  half-a-second-48000.mp3
  webaudio.js
  ../../webrtc/tests/mochitests/mediaStreamPlayback.js
  ../../webrtc/tests/mochitests/head.js
@ -137,6 +139,7 @@ skip-if = !asan && toolkit != android
 [test_decodeAudioError.html]
 [test_decodeMultichannel.html]
 [test_decodeOpusTail.html]
+[test_decoderDelay.html]
 [test_delayNode.html]
 [test_delayNodeAtMax.html]
 [test_delayNodeChannelChanges.html]
--- a/dom/media/webaudio/test/test_decoderDelay.html
+++ b/dom/media/webaudio/test/test_decoderDelay.html
@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test that decoder delay is handled</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+var tests = [
+  "half-a-second-8000.mp3",
+  "half-a-second-48000.mp3",
+];
+
+async function doit(t) {
+  var count = 0;
+  var context = new OfflineAudioContext(1, 128, 48000);
+  tests.forEach(async testfile => {
+    var response = await fetch(testfile);
+    var buffer = await response.arrayBuffer();
+    var decoded = await context.decodeAudioData(buffer);
+    is(decoded.duration, 0.5, "The file is half a second.");
+    if (++count == tests.length) {
+      SimpleTest.finish();
+    }
+  });
+}
+
+doit();
+
+</script>
+</pre>
+</body>
+</html>