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Run-length encoded replay data #446

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olofson opened this issue Mar 24, 2017 · 0 comments

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enhancement refactor

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olofson commented Mar 24, 2017

There are some issues with the current replay input log format:

Only 8 bits per game logic frame (that's only enough for direction + two buttons with full detection)
Continuously consumes one byte per game logic frame
Still not huge files, but it'll get worse with 100 Hz game logic.

Suggested encoding

Raw data: 32 bits per logic frame
8 bit encoding units
Values 0..127 are delays
- Insert extra delays to handle long periods with no changes
When the MSB is set, the remaining bits hold new data, and tell where it belongs;
- bits 6..4 is the nibble offset
- bits 3..0 hold the data

olofson added enhancement refactor labels

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