Commit Graph

5 Commits

Author SHA1 Message Date
f3d03a1b87 Update comments and fix some bugs
- use MASKED_DOTS since it does not have a simple relationship to the
- try disabling transposition distances for Damerau-Levenshtein, this
  may give better quality

- introduce separate notion of MASKED_DOTS which is the number of
  (coloured) pixels we can extract from MASKED_BITS.  For HGR this is
  not the same.
- fix bug in _fix_array_neighbours that was not fixing headers for HGR
- don't cache everything in byte_pair_differences, it's effectively
  unbounded.  Using 1M for LRU size seems to work just as well in
  practise, without leaking memory.
- fix bug in _diff_weights when comparing content, we want to evaluate
  the effect of storing content byte in each offset separately, not
- add a consistency check function (not currently wired up) to assert
  that headers/footers are in sync across columns
- HGR should have 16 body bits, this was causing headers not to
  propagate correctly to/from neighbouring column
- add test case for this bug

- Use 8 random bits consistently, using 16 in some places may have
  introduced bias
- ignore palette bit when comparing 0x00 and 0x7f in sanity check
2019-07-11 23:40:00 +01:00
b2c00784b0 Minor code cleanups 2019-06-21 22:08:22 +01:00
7d041a6a84 Store video frames in {basename}/{mode}/{palette}/ directory to
disambiguate different values (for palettes in particular)
2019-06-20 21:15:52 +01:00
ca817999f6 Parametrize the RGB palette to encode with, and support both NTSC and
IIGS palettes.

Move the palette diff_matrix generation into since
that is the only place it is used.

Demand-load the edit distance matrices when transcoding.
2019-06-15 21:02:00 +01:00
549752e112 Rename FrameSequencer to FrameGrabber and break out into separate file.
Add a test case that the bmp2dhr output of input filenames containing
'.'  are handled correctly.

Break out video.Mode into video_mode.VideoMode to resolve circular
2019-06-14 21:59:39 +01:00