olaf_ep_extractor.h

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// Olaf: Overly Lightweight Acoustic Fingerprinting
// Copyright (C) 2019-2025  Joren Six
 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
 
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

 
#ifndef OLAF_EP_EXTRACTOR_H
#define OLAF_EP_EXTRACTOR_H
 
    #include "olaf_config.h"
      
    struct eventpoint {
        int frequencyBin; 
        int timeIndex; 
        float magnitude; 
        int usages; 
    };
 
    
    struct extracted_event_points{
        struct eventpoint * eventPoints; 
        int eventPointIndex; 
    };
    
    typedef struct Olaf_EP_Extractor Olaf_EP_Extractor;

    Olaf_EP_Extractor * olaf_ep_extractor_new(Olaf_Config * config);

    void olaf_ep_extractor_print_ep(struct eventpoint);

    struct extracted_event_points * olaf_ep_extractor_extract(Olaf_EP_Extractor * olaf_ep_extractor, float* fft_magnitudes, int audioBlockIndex);

    float * olaf_ep_extractor_mags(Olaf_EP_Extractor * olaf_ep_extractor);
 
    void olaf_ep_extractor_destroy(Olaf_EP_Extractor * olaf_ep_extractor );
 
 
#endif // OLAF_EP_EXTRACTOR_H