[Webkit-unassigned] [Bug 218228] New: [MSE] Infinite loop in sample eviction when duration is NaN

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=218228

            Bug ID: 218228
           Summary: [MSE] Infinite loop in sample eviction when duration
                    is NaN
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pnormand at igalia.com

When playing live streams the MediaSource DOM duration attribute has no meaning and would thus be set as +inf. When seeks are triggered to positions prior to the current playback position the SourceBuffer might attempt to free some space in order to keep the amount of memory used under control. It proceeds in 2 steps:

1. Attempt to free space represented by buffered range from media start up until current playback position - 30 seconds.
2. If step 1 didn't free enough memory, attempt to release memory represented by buffered ranges starting from current playback position + 30 seconds until media duration.

Step 2 here is not taking into account the case where MediaSource.duration is actually invalid, and thus enters an infinite loop.

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