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_ */