[Webkit-unassigned] [Bug 177920] Autoplay muted videos still stop playback of other streaming apps in the background

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177920

--- Comment #3 from Jer Noble <jer.noble at apple.com> ---
The underlying cause seems to be the order in which HTMLMediaElement ivars are constructed. The MediaElementSession is created before m_isPlayingToWirelessTarget is initialized to false (so therefore, is sometimes true), and when it checks whether the element canProduceAudio(), that check will sometimes return true (because m_isPlayingToWirelessTarget is true).

TL,DR: other audio is being interrupted because the PlatformMediaSessionManager thinks the media element is AirPlaying.

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