bbl2csv

This is a cli frontend for blackbox-log inspired by the original blackbox_decode.

Feature comparison

	blackbox_decode	bbl2csv
Log format v1	✔️	❌
Recent Betaflight logs	❌	✔️
Raw output	✔️	❌
Write output to stdout	✔️	❌
GPS data	merged, separate, or gpx	separate
Current meter simulation	✔️	❌
IMU simulation	✔️	❌
Change output units	✔️	❌
Filter output fields	❌	✔️
Parallel log parsing	❌	✔️

Benchmarks

As of 2b28331, with this log:

$ exa -lbs size --no-time --no-permissions --no-user LOG00001.BFL
6.6Mi LOG00001.BFL

$ hyperfine -w 10 -L bin ./bbl2csv,blackbox_decode '{bin} LOG00001.BFL'
Benchmark #1: ./bbl2csv LOG00001.BFL
  Time (mean ± σ):     598.2 ms ±  13.6 ms    [User: 542.6 ms, System: 46.6 ms]
  Range (min … max):   574.4 ms … 622.6 ms    10 runs

Benchmark #2: blackbox_decode LOG00001.BFL
  Time (mean ± σ):      1.072 s ±  0.013 s    [User: 1.019 s, System: 0.044 s]
  Range (min … max):    1.056 s …  1.098 s    10 runs

Summary
  './bbl2csv LOG00001.BFL' ran
    1.79 ± 0.05 times faster than 'blackbox_decode LOG00001.BFL'

LOG00001.BFL contains only one log. Files with multiple logs will see even larger improvements since logs are decoded in parallel using rayon.