median.h

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#ifndef MEDIAN_TYPED_H
#define MEDIAN_TYPED_H
 
#include <esp_err.h>
#include <stdint.h>
 
// Integer-based median filter using 32-bit samples
typedef struct {
  int window_size; // must be odd
  int idx;         // circular buffer index
  int count;       // num of elements in the array
  int32_t *buffer; // raw int32_t samples
  int *sorted_idx; // sorted indices into buffer
} median_filter_int_t;
 
// Float-based median filter
typedef struct {
  int window_size; // must be odd
  int idx;         // circular buffer index
  int count;       // num of elements in the array
  float *buffer;   // raw float samples
  int *sorted_idx; // sorted indices into buffer
} median_filter_float_t;

esp_err_t median_init_int(median_filter_int_t *f, int32_t *buffer,
                          int *sorted_idx, int size);

esp_err_t median_init_float(median_filter_float_t *f, float *buffer,
                            int *sorted_idx, int size);

int32_t median_filter_int(median_filter_int_t *f, int32_t new_sample);

float median_filter_float(median_filter_float_t *f, float new_sample);
 
 
#endif // MEDIAN_TYPED_H