[FFmpeg-trac] #4669(avcodec:open): jpeg2000: fix decoding of precints 2

[FFmpeg]

#4669: jpeg2000: fix decoding of precints 2
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             Reporter:  ami_stuff   |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  j2k         |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |
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Comment (by ami_stuff):

 {{{
 C:\>kdu_compress.exe -i test.bmp -o prec3.jp2 Creversible=yes
 Cprecincts={128,128} Stiles={71,393}
 Note:
     The default rate control policy for colour images employs visual (CSF)
     weighting factors.  To minimize MSE instead, specify `-no_weights'.
 Note:
     If you want quality scalability, you should generate multiple layers
 with
     `-rate' or by using the "Clayers" option.

 Generated 33 tile-part(s) for a total of 33 tile(s).
 Code-stream bytes (excluding any file format) = 758,998 = 8.114903
 bits/pel.
 Layer bit-rates (possibly inexact if tiles are divided across tile-parts):
         8.114903
 Layer thresholds:
         0
 Processed using the multi-threaded environment, with
     8 parallel threads of execution
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/4669#comment:2>
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