[webkit-changes] [WebKit/WebKit] f40757: [iOS] Remote playback of autoplaying & muted video...

[Jer Noble]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: f407579f73e56aa92f28abd35fc292933eb0ed27
      https://github.com/WebKit/WebKit/commit/f407579f73e56aa92f28abd35fc292933eb0ed27
  Author: Jer Noble <jer.noble at apple.com>
  Date:   2022-09-26 (Mon, 26 Sep 2022)

  Changed paths:
    M Source/WebCore/html/HTMLMediaElement.cpp

  Log Message:
  -----------
  [iOS] Remote playback of autoplaying & muted videos stops when device is locked
https://bugs.webkit.org/show_bug.cgi?id=245238
<rdar://98685762>

Reviewed by Eric Carlson.

Modify `canProduceAudio()` to take volume state into account, and only take mute state into
account for non-GStreamer ports.

Then, use `canProduceAudio()` to calculate the IsPlayingAudio state to report upward to the
Document's mediaState.

This results in the Document (and UIProcess) reporting that the page is performing audible
playback, and keeps the WebContent/GPU processes from suspending when in app background state.

* Source/WebCore/html/HTMLMediaElement.cpp:
(WebCore::HTMLMediaElement::mediaType const):
(WebCore::HTMLMediaElement::canProduceAudio const):
(WebCore::HTMLMediaElement::mediaState const):

Canonical link: https://commits.webkit.org/254887@main