[Webkit-unassigned] [Bug 221413] Safari does not execute JavaScript code to play another audio item when playing backgrounded FairPlay content

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221413

Brad Isbell <brad at audiopump.co> changed:

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--- Comment #4 from Brad Isbell <brad at audiopump.co> ---
Created attachment 458973

  --> https://bugs.webkit.org/attachment.cgi?id=458973&action=review

Demonstrates the bug in iOS Safari

This bug is still an issue, and is also a problem for regular audio files without DRM.

Attached is a page with some script demonstrating the issue.

Observations:

 - The `ended` event does fire and its handlers do run, even when the screen is off.
 - Upon replacing the `src` of the `<audio>` element, it cannot be played via script when the screen is off.
 - The `paused` property value is `false`, `currentTime` is `0` zero.  Audio playback does not occur.
 - The only way to resume playback is to unlock phone, and use a UI element to call `.play()` on the audio element.

This prevents web apps from playing from a playlist of media.  It also seems to be a regression, as this method used to work.  This method is also documented here:  https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/ControllingMediaWithJavaScript/ControllingMediaWithJavaScript.html#//apple_ref/doc/uid/TP40009523-CH3-SW5

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