Add a generic sigproc binner unit#157
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Hoist the bin-boundary arithmetic out of BinnedAggregateTransformer into a
reusable, backend-agnostic BinSchedule (ezmsg.sigproc.util.binning) so that
every consumer that needs fixed-duration binning lands on the same grid by
sharing one schedule rather than re-deriving the formula.
- BinSchedule owns fs, samples-per-bin, output gain/offset, the global bin
index, and the carried sample count; it touches no array data. Consumers
layer their own data carry (raw samples here; a scalar partial-sum for an
event counter) on top of the shared boundaries.
- BinnedAggregateTransformer now delegates all boundary/gain/offset math to
BinSchedule.advance() and only slices+aggregates at the returned cut points.
- Integer mode now truncates (int) instead of round() so the sample-locked
grid matches Window's int(window_dur*fs) for any rate, not just when the
fractional part is < 0.5.
- test_bin_schedule.py pins fractional=True against a faithful port of
EventRate's accumulator algorithm and fractional=False against Window's
grid, across chunkings and at fs in {30000, 30012, 30030}. The 30030 case
(spb=600.6) is where truncation vs rounding diverges.
This converts the previous "agreement with EventRate by construction, untested"
into shared code with a regression test, and sets up EventRate (ezmsg-event) to
delegate to the same primitive.
test_concat_along_ch drove its coroutine via asyncio.get_event_loop() .run_until_complete(), which raises "no current event loop" on Python 3.10+ once any earlier test in the suite has called asyncio.run() (which clears the loop policy). It passed in isolation but failed after, e.g., test_binned_aggregate's asyncio.run()-based test. Use asyncio.run(), which is self-contained and order-independent.
Extract BinSchedule: shared bin-boundary primitive
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Add a generic sigproc binner that other units can use to bin in the same way. Different binning was causing the root of the mismatch SBP vs SPK pathway timestamps.