nrf_dsp_window_flatten.h

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/*
 * Copyright (c) 2026 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
#ifndef _NRF_DSP_UTILS_WINDOW_FLATTEN_H_
#define _NRF_DSP_UTILS_WINDOW_FLATTEN_H_
 
#include <nrf_edgeai/dsp/nrf_dsp_types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct nrf_dsp_window_flatten_s {
        union {
                int8_t  *i8;
                int16_t *i16;
                int32_t *i32;
                flt32_t *f32;
                void    *generic;
        } p_window;
 
        uint16_t max_samples_num;
 
        uint16_t current_sample;
 
        uint16_t uniq_features_num;
 
        uint16_t uniq_features_collected;
} nrf_dsp_window_flatten_t;
 
int8_t nrf_dsp_window_flatten_init(nrf_dsp_window_flatten_t *p_ctx,
                                   void                     *p_window,
                                   const uint16_t            max_samples_num,
                                   const size_t              uniq_features_num);
 
uint16_t nrf_dsp_window_flatten_feed_f32(nrf_dsp_window_flatten_t *p_ctx,
                                         const flt32_t            *p_input,
                                         uint16_t                  num);
 
uint16_t nrf_dsp_window_flatten_feed_i8(nrf_dsp_window_flatten_t *p_ctx,
                                        const int8_t             *p_input,
                                        uint16_t                  num);
 
uint16_t nrf_dsp_window_flatten_feed_i16(nrf_dsp_window_flatten_t *p_ctx,
                                         const int16_t            *p_input,
                                         uint16_t                  num);
 
uint16_t nrf_dsp_window_flatten_feed_bymask_f32(nrf_dsp_window_flatten_t *p_ctx,
                                                const flt32_t            *p_input,
                                                uint16_t                  num,
                                                const uint8_t            *p_usage_mask);
 
uint16_t nrf_dsp_window_flatten_feed_bymask_i8(nrf_dsp_window_flatten_t *p_ctx,
                                               const int8_t             *p_input,
                                               uint16_t                  num,
                                               const uint8_t            *p_usage_mask);
 
uint16_t nrf_dsp_window_flatten_feed_bymask_i16(nrf_dsp_window_flatten_t *p_ctx,
                                                const int16_t            *p_input,
                                                uint16_t                  num,
                                                const uint8_t            *p_usage_mask);
#ifdef __cplusplus
}
#endif
 
#endif /* _NRF_DSP_UTILS_WINDOW_FLATTEN_H_ */