Sine Table

sine_table.c

#include <math.h>

#define PI 3.14159265358979323846

int sinetable(double **table, double frequency, int sample_rate) {
  int i = 0;
  double phase = 0;
  double cycles_per_frame = frequency / sample_rate;
  int frames_per_cycle = (int) (1 / cycles_per_frame);
  double phase_increment = cycles_per_frame * 2 * PI;
  
  if ((*table = malloc(sizeof(double) * frames_per_cycle) == NULL)
    return -1;

  for (i = 0; i < frames_per_cycle; ++i) {
    (*table)[i] = sin(phase);
    phase += phase_increment;
  }
  
 return frames_per_cycle; 
}