[Webkit-unassigned] [Bug 138425] New: webkitwebsrc gstreamer element can stale

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138425

            Bug ID: 138425
           Summary: webkitwebsrc gstreamer element can stale
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: xclaesse at gmail.com

When hlsdemux downloads next fragments, it will change source's state from PAUSE to READY, then change its uri, and change state back from READY to PAUSE. That state change is catched in WebKitWebSourceGStreamer::webKitWebSrcChangeState(). That sequence of events can happen:

1) pause->ready state change, priv->stopID is set to an idle cb ID that will call webKitWebSrcStop in main thread.
2) ready->pause state change, priv->startID is set to an idle cb ID that will call webKitWebSrcStart in main thread.
3) the main thread runs webKitWebSrcStop() that calls removeTimeoutSources() which remove priv->startID source.
And now webKitWebSrcStart will never be called, so it won't download anything.

So that happens when webkitwebsrc's state transition pause->ready->pause quickly.

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