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#ifndef _MQ_H
#define _MQ_H
#include <fftw3.h>
#include <math.h>
typedef double sample;
typedef struct Peak
{
float amplitude;
float frequency;
float phase;
int bin;
struct Peak* next;
struct Peak* prev;
} Peak;
typedef struct PeakList
{
struct PeakList* next;
struct PeakList* prev;
struct Peak* peak;
} PeakList;
typedef struct MQParameters
{
int frame_size;
int max_peaks;
int num_bins;
sample peak_threshold;
sample fundamental;
sample matching_interval;
sample* fft_in;
fftw_complex* fft_out;
fftw_plan fft_plan;
PeakList* prev_peaks;
} MQParameters;
int init_mq(MQParameters* params);
void reset_mq(MQParameters* params);
int destroy_mq(MQParameters* params);
void delete_peak_list(PeakList* peak_list);
PeakList* sort_peaks_by_frequency(PeakList* peak_list, int num_peaks);
PeakList* find_peaks(int signal_size, sample* signal, MQParameters* params);
PeakList* track_peaks(PeakList* peak_list, MQParameters* params);
#endif
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