[FFmpeg-trac] #4842(avcodec:closed): wrong mask in dxv

[FFmpeg]

#4842: wrong mask in dxv
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             Reporter:               |                    Owner:
  projectsymphony                    |                   Status:  closed
                 Type:  defect       |                Component:  avcodec
             Priority:  normal       |               Resolution:  invalid
              Version:  git-master   |               Blocked By:
             Keywords:  dxv          |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
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Comment (by projectsymphony):

 Thanks for the sample. I was able to confirm that the sample is valid and
 it comes from the very first version of the codec (which supported only a
 single decoding mode, hence the absence of the else in the binary).

 The check could be either removed entirely, or it could be set to test the
 encoder version exclusively. I think would prefer the latter so here is
 attached a patch that does that.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4842#comment:6>
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