nrf_dsp_melspectr.h

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/*
 * Copyright (c) 2026 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
#ifndef _NRF_DSP_TRANSFORM_MELSPECTROGRAM_H_
#define _NRF_DSP_TRANSFORM_MELSPECTROGRAM_H_
 
#include <nrf_edgeai/dsp/nrf_dsp_types.h>
#include "nrf_dsp_rfht.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct
{
    flt32_t* p_melspectrum;
 
    nrf_dsp_rfht_instance_t fht;
 
    uint16_t sample_rate;
 
    uint16_t current_fill;
 
    uint16_t freq_bands;
 
    uint16_t time_bands;
} nrf_dsp_melspectr_ctx_f32_t;
 
int8_t nrf_dsp_melspectr_make_f32(nrf_dsp_melspectr_ctx_f32_t* p_ctx, flt32_t* p_audio_input);
 
void nrf_dsp_melspectr_shift_f32(nrf_dsp_melspectr_ctx_f32_t* p_ctx, uint16_t shift);
 
#ifdef __cplusplus
}
#endif
 
#endif /* _NRF_DSP_TRANSFORM_MELSPECTROGRAM_H_ */