Better index step value scanning by checking with our expected set

epoch_index_backup
Tyler Goodlet 2023-01-02 15:06:07 -05:00
parent adeb969810
commit 7ec30efff4
1 changed files with 22 additions and 1 deletions

View File

@ -217,6 +217,9 @@ def render_baritems(
)
_sample_rates: set[float] = {1, 60}
class Viz(msgspec.Struct): # , frozen=True):
'''
(Data) "Visualization" compound type which wraps a real-time
@ -284,15 +287,33 @@ class Viz(msgspec.Struct): # , frozen=True):
reset: bool = False,
) -> float:
# attempt to dectect the best step size by scanning a sample of
# the source data.
if self._index_step is None:
index = self.shm.array[self.index_field]
isample = index[:16]
mxdiff = np.diff(isample).max()
mxdiff: None | float = None
for step in np.diff(isample):
if step in _sample_rates:
if (
mxdiff is not None
and step != mxdiff
):
raise ValueError(
f'Multiple step sizes detected? {mxdiff}, {step}'
)
mxdiff = step
self._index_step = max(mxdiff, 1)
if (
mxdiff < 1
or 1 < mxdiff < 60
):
# TODO: remove this once we're sure the above scan loop
# is rock solid.
breakpoint()
return self._index_step