[FFmpeg-trac] #6194(undetermined:new): qdrw: fix decoding odd-sized 2bpp

[FFmpeg]

#6194: qdrw: fix decoding odd-sized 2bpp
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 https://trac.ffmpeg.org/raw-attachment/ticket/6173/2bit_777.pct

 {{{
 C:\>ffmpeg -i C:\2bit_777.pct out.bmp
 ffmpeg version 3.2.git Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 4.6.2 (GCC)
   configuration: --disable-pthreads --disable-ffprobe --enable-gpl
   libavutil      55. 47.100 / 55. 47.100
   libavcodec     57. 81.100 / 57. 81.100
   libavformat    57. 66.102 / 57. 66.102
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 74.100 /  6. 74.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 [qdraw @ 0237d8c0] Warning: not compiled with thread support, using thread
 emula
 tion
 Input #0, qdraw_pipe, from 'C:\2bit_777.pct':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: qdraw, pal8, 777x777, 25 tbr, 25 tbn, 25 tbc
 [qdraw @ 027199c0] Warning: not compiled with thread support, using thread
 emula
 tion
 [bmp @ 02377d00] Warning: not compiled with thread support, using thread
 emulati
 on
 Output #0, image2, to 'out.bmp':
   Metadata:
     encoder         : Lavf57.66.102
     Stream #0:0: Video: bmp, pal8, 777x777, q=2-31, 200 kb/s, 25 fps, 25
 tbn, 25
  tbc
     Metadata:
       encoder         : Lavc57.81.100 bmp
 Stream mapping:
   Stream #0:0 -> #0:0 (qdraw (native) -> bmp (native))
 Press [q] to stop, [?] for help
 Error while decoding stream #0:0: Invalid data found when processing input
 frame=    0 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=N/A
 video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing ove
 rhead: unknown
 Output file is empty, nothing was encoded (check -ss / -t / -frames
 parameters i
 f used)
 Conversion failed!
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/6194>
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