[Bug 23554] New: Coded frame processing step 14 is very hard to parse

https://www.w3.org/Bugs/Public/show_bug.cgi?id=23554

            Bug ID: 23554
           Summary: Coded frame processing step 14 is very hard to parse
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: minor
          Priority: P2
         Component: Media Source Extensions
          Assignee: adrianba@microsoft.com
          Reporter: watsonm@netflix.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-media@w3.org

"If last decode timestamp for track buffer is unset and there is a coded frame
in track buffer with a presentation timestamp less than or equal to
presentation timestamp and presentation timestamp is less than this coded
frame's presentation timestamp plus its frame duration, then run the following
steps:"

I suggest defining the "presentation interval" of a frame somewhere and
replacing the above with:

"If last decode timestamp for track buffer is unset and presentation timestamp
falls within the presentation interval of a coed frame in track buffer, then
run the following steps:"

"Presentation interval" would be defined as follows:

"The presentation interval of a frame is the time interval from the
presentation time of the frame to the presentation time of the frame plus its
frame duration."

We might want to define it as the open range which includes the start value but
not the end value (i.e. [ p, p + d ) for p = presentation time, d = frame
duration).

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Received on Thursday, 17 October 2013 20:19:10 UTC