[Webkit-unassigned] [Bug 178819] New: [MSE][GStreamer] Fix hang on clearing/destroying AppendPipeline

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=178819

            Bug ID: 178819
           Summary: [MSE][GStreamer] Fix hang on clearing/destroying
                    AppendPipeline
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: eocanha at igalia.com

A deadlock may occur when UI thread tries to clear pipeline in AppendPipeline::clearPlayerPrivate() while parser thread tries to change pipeline state to pause holding the stream lock in AppendPipeline::connectDemuxerSrcPadToAppsinkFromAnyThread().

This issue has been fixed downstream in https://github.com/WebPlatformForEmbedded/WPEWebKit/pull/392

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