[webkit-changes] [WebKit/WebKit] 0218f0: [GStreamer] Constant CPU usage on autoplaying vide...

[Philippe Normand]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 0218f0f88a9ca5670d3e9eea1c95903ef8152a68
      https://github.com/WebKit/WebKit/commit/0218f0f88a9ca5670d3e9eea1c95903ef8152a68
  Author: Philippe Normand <philn at igalia.com>
  Date:   2023-05-12 (Fri, 12 May 2023)

  Changed paths:
    M Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp
    M Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h
    M Tools/Scripts/webkitpy/port/glib.py

  Log Message:
  -----------
  [GStreamer] Constant CPU usage on autoplaying videos, even when out of viewport
https://bugs.webkit.org/show_bug.cgi?id=256123

Reviewed by Xabier Rodriguez-Calvar.

The GStreamer player now implements the `MediaPlayerPrivate::setVisibleInViewport()` by pausing
invisible autoplaying muted non-mediastream video players. Playback is resumed to previous state
when they become visible again. Metadata loading on invisible players is still allowed.

* Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp:
(WebCore::MediaPlayerPrivateGStreamer::load):
(WebCore::MediaPlayerPrivateGStreamer::changePipelineState):
(WebCore::MediaPlayerPrivateGStreamer::updateStates):
(WebCore::MediaPlayerPrivateGStreamer::triggerRepaint):
(WebCore::MediaPlayerPrivateGStreamer::setVisibleInViewport):
(WebCore::MediaPlayerPrivateGStreamer::paint):
* Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.h:

Canonical link: https://commits.webkit.org/264017@main