1771069 - Intermittent /webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html | All data processed correctly - assert_array_approx_equals: comparing expected and rendered buffers (channel 0) lengths diffe

Status: RESOLVED FIXED

(Core :: Web Audio, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: mlaza [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=379210289&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/f9XQ14s-R-StzsUQWSwp1g/runs/0/artifacts/public/logs/live_backing.log

---

[task 2022-05-25T00:45:56.657Z] 00:45:56     INFO - TEST-PASS | /webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html | Channel 0 processed some data 
[task 2022-05-25T00:45:56.657Z] 00:45:56     INFO - TEST-UNEXPECTED-FAIL | /webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html | All data processed correctly - assert_array_approx_equals: comparing expected and rendered buffers (channel 0) lengths differ, expected 44098 got 43715
[task 2022-05-25T00:45:56.657Z] 00:45:56     INFO - runTests/<@http://web-platform.test:8000/webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html:110:34
[task 2022-05-25T00:45:56.657Z] 00:45:56     INFO - Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2590:25
[task 2022-05-25T00:45:56.657Z] 00:45:56     INFO - test@http://web-platform.test:8000/resources/testharness.js:628:30
[task 2022-05-25T00:45:56.657Z] 00:45:56     INFO - runTests@http://web-platform.test:8000/webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html:109:10
[task 2022-05-25T00:45:56.658Z] 00:45:56     INFO - bufferLoadCompleted@http://web-platform.test:8000/webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html:44:14
[task 2022-05-25T00:45:56.658Z] 00:45:56     INFO - Test.prototype.step@http://web-platform.test:8000/resources/testharness.js:2590:25
[task 2022-05-25T00:45:56.658Z] 00:45:56     INFO - Test.prototype.step_func/<@http://web-platform.test:8000/resources/testharness.js:2637:35
[task 2022-05-25T00:45:56.658Z] 00:45:56     INFO - decodeSuccessCallback@http://web-platform.test:8000/webaudio/js/buffer-loader.js:31:14
[task 2022-05-25T00:45:56.802Z] 00:45:56     INFO - TEST-OK | /webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/mediaElementAudioSourceToScriptProcessorTest.html | took 1597ms

Comment 1

[Andreea Pavel [:apavel]]

Hi Paul, can this be a regression of bug 1743834?

Comment 2

[Paul Adenot (:padenot)]

Most probably bug 1767549 that I landed just a few hours before the one you mention.

Comment 3

[Andreea Pavel [:apavel]]

Thank you for checking.

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1767549

Comment 5

[Intermittent Failures Robot]

19 failures in 2624 pushes (0.007 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-central: 10
• autoland: 6
• try: 3

Platform and build breakdown:

• android-em-7-0-x86_64-shippable-lite-qr: 6
  • opt: 6
• macosx1015-64-qr: 4
  • debug: 1
  • opt: 3
• android-em-7-0-x86_64-lite-qr: 2
  • opt: 2
• macosx1015-64-shippable-qr: 4
  • opt: 4
• android-em-7-0-x86_64-qr: 1
  • opt: 1
• linux1804-64-shippable-qr: 1
  • opt: 1
• windows10-32-2004-shippable-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1771069&startday=2022-05-23&endday=2022-05-29&tree=all

Comment 6

[Karl Tomlinson (:karlt)]

Attachment: Bug 1771069 wait for context.state == running so AudioContext will capture start of Audio element playback r?padenot

https://webaudio.github.io/web-audio-api/#MediaElementAudioSourceNode

The HTMLMediaElement MUST behave in an identical fashion after the
MediaElementAudioSourceNode has been created, except that the rendered audio
will no longer be heard directly, but instead will be heard as a consequence
of the MediaElementAudioSourceNode being connected through the routing
graph. Thus pausing, seeking, volume, src attribute changes, and other
aspects of the HTMLMediaElement MUST behave as they normally would if not
used with a MediaElementAudioSourceNode.

https://webaudio.github.io/web-audio-api/#dom-audiocontext-audiocontext

Sending a control message to start processing means executing the following
steps:

1. Attempt to acquire system resources. In case of failure, abort the
   following steps.
2. Set the [[rendering thread state]] to running on the AudioContext.

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/7f91228378fe
wait for context.state == running so AudioContext will capture start of Audio element playback r=padenot

Comment 8

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/34293 for changes under testing/web-platform/tests

Comment 9

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/7f91228378fe

Comment 10

[Intermittent Failures Robot]

8 failures in 2917 pushes (0.003 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 3
• autoland: 3
• mozilla-central: 2

Platform and build breakdown:

• macosx1015-64-shippable-qr: 4
  • opt: 4
• macosx1015-64-qr: 2
  • opt: 2
• linux1804-64-qr: 1
  • debug: 1
• linux1804-64-tsan-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1771069&startday=2022-05-30&endday=2022-06-05&tree=all

Comment 11

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/releases/mozilla-beta/rev/a7a9eba5b4fb