#include "byte_math.h"

// The shape of a "spike"
uint8_t w_arr[91] = {1,   2,   4,   7,   11,  17,  24,  33,  44,  56,  70,  85,
                     101, 117, 134, 151, 167, 183, 197, 210, 222, 232, 240, 247,
                     251, 254, 255, 255, 253, 250, 246, 240, 234, 227, 219, 211,
                     202, 194, 185, 176, 167, 158, 149, 140, 132, 123, 116, 108,
                     101, 94,  87,  81,  75,  69,  64,  59,  54,  50,  46,  42,
                     39,  35,  32,  30,  27,  25,  22,  20,  18,  17,  15,  14,
                     12,  11,  10,  9,   8,   7,   6,   6,   5,   4,   4,   3,
                     3,   3,   2,   2,   2,   1,   1};

uint8_t sintable[256] = {
    128, 131, 134, 137, 140, 143, 146, 149, 152, 155, 158, 162, 165, 167, 170,
    173, 176, 179, 182, 185, 188, 190, 193, 196, 198, 201, 203, 206, 208, 211,
    213, 215, 218, 220, 222, 224, 226, 228, 230, 232, 234, 235, 237, 238, 240,
    241, 243, 244, 245, 246, 248, 249, 250, 250, 251, 252, 253, 253, 254, 254,
    254, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 253, 253, 252, 251,
    250, 250, 249, 248, 246, 245, 244, 243, 241, 240, 238, 237, 235, 234, 232,
    230, 228, 226, 224, 222, 220, 218, 215, 213, 211, 208, 206, 203, 201, 198,
    196, 193, 190, 188, 185, 182, 179, 176, 173, 170, 167, 165, 162, 158, 155,
    152, 149, 146, 143, 140, 137, 134, 131, 128, 124, 121, 118, 115, 112, 109,
    106, 103, 100, 97,  93,  90,  88,  85,  82,  79,  76,  73,  70,  67,  65,
    62,  59,  57,  54,  52,  49,  47,  44,  42,  40,  37,  35,  33,  31,  29,
    27,  25,  23,  21,  20,  18,  17,  15,  14,  12,  11,  10,  9,   7,   6,
    5,   5,   4,   3,   2,   2,   1,   1,   1,   0,   0,   0,   0,   0,   0,
    0,   1,   1,   1,   2,   2,   3,   4,   5,   5,   6,   7,   9,   10,  11,
    12,  14,  15,  17,  18,  20,  21,  23,  25,  27,  29,  31,  33,  35,  37,
    40,  42,  44,  47,  49,  52,  54,  57,  59,  62,  65,  67,  70,  73,  76,
    79,  82,  85,  88,  90,  93,  97,  100, 103, 106, 109, 112, 115, 118, 121,
    124,
};

uint8_t calc_w(uint8_t n)
{
  if (n < 164) {
    return 0;
  }

  return w_arr[n - 164];
}