[Webkit-unassigned] [Bug 226867] New: [MSE] When currentTime is a large value, it takes time to process SourceBufferPrivate::evictCodedFrames().

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=226867

            Bug ID: 226867
           Summary: [MSE] When currentTime is a large value, it takes time
                    to process SourceBufferPrivate::evictCodedFrames().
           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: toshio.ogasawara at access-company.com

SourceBufferPrivate::evictCodedFrames() loops to evict frames in a unit of 30 seconds from MediaTime::zeroTime() to "currentTime - thirtySeconds".
In the case of that currentTime is very large (eg. 180,000,000), evictCodedFrames() loops huge times to complete the eviction process. (in the example, it loops 6,000,000 times.)
To make matters worse, the looping process is executed even if there is no MediaSample to be evicted in a track buffer.
That is a point which should be improved.

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