#pragma once
#include "ggml-backend.h"
#include <vector>

struct whisper_mel {
    int n_len;
    int n_len_org;
    int n_mel;

    std::vector<float> data;
};

struct whisper_filters {
    int32_t n_mel;
    int32_t n_fft;

    std::vector<float> data;
};

template <typename T>
struct whisper_span {
    T * data;
    int len;
};

struct whisper_mel_calc {
    virtual ~whisper_mel_calc();
    virtual whisper_mel calculate(whisper_span<const float> samples, int n_threads) const = 0;
    static whisper_span<const float> hann_window();
};

// returns a new pointer which needs to be freed with delete
whisper_mel_calc * whisper_mel_calc_create(ggml_backend_t backend, const whisper_filters & filters);