xtos_bandpass_process

Runs the band-pass baseline’s high-pass and low-pass stages in sequence.

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Declaration

#include <xtos/signal.h>

int xtos_bandpass_process(struct xtos_bandpass_filter *filter,
                          const double *input,
                          double *output,
                          size_t count);

Parameters

Parameter	Type	Description
filter	struct xtos_bandpass_filter *	Non-NULL state; do not share the same state concurrently.
input	const double *	Non-NULL input with at least count entries; it may equal output exactly.
output	double *	Non-NULL output with at least count entries; do not use partially overlapping arrays.
count	size_t	Number of elements; zero is allowed.

Return value

Returns 0 on success and -1 for invalid arguments; success updates both stage states.

Errors

errno	Condition
EINVAL	filter, input, or output is NULL.

Notes

The implementation calls two non-allocating process stages; it does not check input NaN/Inf.
Exact in-place processing is supported; do not reinitialize for every analysis window when filtering a continuous signal.

Example

Source

This reference describes headers and implementation at OpenXTOS commit dd313955ad57542bcd2af8827157d1bbd0cf5e83.