nrf_dsp_scale_zscore.h

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/*
 * Copyright (c) 2026 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
#ifndef _NRF_DSP_SUPPORT_SCALE_ZSCORE_H_
#define _NRF_DSP_SUPPORT_SCALE_ZSCORE_H_
 
#include <nrf_edgeai/dsp/nrf_dsp_types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
void nrf_dsp_scale_zscore_f32(const flt32_t* p_input,
                              uint16_t       num,
                              const flt32_t  mean,
                              const flt32_t  stddev,
                              flt32_t*       p_output);
 
void nrf_dsp_scale_zscore_i8(const int8_t* p_input,
                             uint16_t      num,
                             const int8_t  mean,
                             const int8_t  stddev,
                             int8_t*       p_output);
 
void nrf_dsp_scale_zscore_i16(const int16_t* p_input,
                              uint16_t       num,
                              const int16_t  mean,
                              const int16_t  stddev,
                              int16_t*       p_output);
 
#define nrf_dsp_scale_zscore_int_q(var, qfactor, mean, stddev) \
    (((int32_t)(var - mean) * qfactor) / stddev)
 
#define nrf_dsp_scale_zscore_float(var, mean, stddev) ((flt32_t)(var - mean) / stddev)
 
#define nrf_dsp_scale_zscore_float_q(var, qfactor, mean, stddev) (((var - mean) * qfactor) / stddev)
 
#ifdef __cplusplus
}
#endif
 
#endif /* _NRF_DSP_SUPPORT_SCALE_ZSCORE_H_ */