test/lpf.h

   1 #define MAIN(x) lpf##x
   2 #include "test.h"
   3 #include "a/lpf.h"
   4 #include <time.h>
   5
   6 #define RAND_MAX_ 2147483647
   7 static unsigned long rand_seed = 1;
   8 static void srand_(unsigned long seed)
   9 {
  10     rand_seed = seed;
  11 }
  12 static long rand_(void)
  13 {
  14     rand_seed = (rand_seed * 1103515245 + 12345) % 2147483648;
  15     return a_cast_s(long, rand_seed);
  16 }
  17
  18 int main(int argc, char *argv[]) // NOLINT(misc-definitions-in-headers)
  19 {
  20     main_init(argc, argv, 1);
  21     a_lpf ctx = A_LPF_INIT(A_LPF_GEN(10, 0.01));
  22     a_lpf_init(&ctx, a_lpf_gen(10, A_FLOAT_C(0.01)));
  23     srand_(a_cast_s(unsigned long, time(A_NULL)));
  24     for (unsigned int i = 0; i < 100; ++i)
  25     {
  26         a_float noise = (a_float_c(rand_()) / a_float_c(RAND_MAX_) - A_FLOAT_C(0.5));
  27         a_float x = A_FLOAT_PI / 25 * a_float_c(i);
  28         a_float x0 = a_float_sin(x);
  29         a_float x1 = x0 + A_FLOAT_C(0.2) * noise;
  30         a_float x2 = a_lpf_iter(&ctx, x1);
  31         debug(A_FLOAT_PRI("+", "f,") A_FLOAT_PRI("+", "f,") A_FLOAT_PRI("+", "f,") A_FLOAT_PRI("+", "f\n"), x, x0, x1, x2);
  32     }
  33     a_lpf_zero(&ctx);
  34 #if defined(__cplusplus) && (__cplusplus > 201100L)
  35     A_ASSERT_BUILD(std::is_pod<a_lpf>::value);
  36 #endif /* __cplusplus */
  37     return 0;
  38 }