nrf_dsp_rfht.h

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/*
 * Copyright (c) 2026 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
#ifndef _NRF_DSP_TRANSFORM_REAL_FHT_H_
#define _NRF_DSP_TRANSFORM_REAL_FHT_H_
 
#include <nrf_edgeai/dsp/nrf_dsp_types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define NRF_DSP_FRACT_BITS_7  7
#define NRF_DSP_FRACT_BITS_15 15
 
typedef struct nrf_dsp_rfht_instance_s
{
    void* p_sin_table;
 
    void* p_tg_table;
 
    uint16_t* p_rev_bit_index;
 
    void* p_window;
 
    uint16_t window_size;
 
    uint16_t log_n;
} nrf_dsp_rfht_instance_t;
 
int8_t nrf_dsp_rfht_init(nrf_dsp_rfht_instance_t* p_inst,
                         const void*              p_sin_table,
                         const void*              p_tg_table,
                         const uint16_t*          p_rev_bit_index,
                         void*                    p_window,
                         const uint16_t           window_size,
                         const uint16_t           log_n);
 
void nrf_dsp_rfht_f32(const nrf_dsp_rfht_instance_t* p_inst);
 
uint16_t nrf_dsp_rfht_i16(const nrf_dsp_rfht_instance_t* p_inst);
 
uint16_t nrf_dsp_rfht_i8(const nrf_dsp_rfht_instance_t* p_inst);
 
#ifdef __cplusplus
}
#endif
 
#endif /* _NRF_DSP_TRANSFORM_REAL_FHT_H_ */