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// Pretty Good Oscillator
//
// pretty_good_oscillator
//
// Pretty Good Oscillator
//
//
//
// Inputs: 1
// Outputs: 1
// Constants: 0
#include "ts.h"
ts_parameter_t const ts_pretty_good_oscillator_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 0, .params_size = 0 };
uint_t ts_pretty_good_oscillator_offset( ts_constant_t const *c )
{
( void )c;
return ( 0 );
}
int ts_pretty_good_oscillator(
fp_t * const *y, uint_t y_n,
fp_t const * const *x, uint_t x_n,
uint_t n, ts_constant_t const *c
)
{
TS_PROLOGUE( ts_pretty_good_oscillator_p );
(void)c;
fp_t ema14 = x[0][0];
fp_t ema30 = x[0][0];
fp_t ema90 = x[0][0];
fp_t a14 = 15.0 / (19.0 * 14);
fp_t a30 = 15.0 / (19.0 * 30);
fp_t a90 = 15.0 / (19.0 * 90);
for( uint_t i = 0; i < n; ++i )
{
if( i > 0 )
{
ema14 = ema14 + a14 * (x[0][i] - ema14);
ema30 = ema30 + a30 * (x[0][i] - ema30);
ema90 = ema90 + a90 * (x[0][i] - ema90);
}
fp_t arr[3] = {ema14, ema30, ema90};
for( uint_t a = 0; a < 2; ++a )
for( uint_t b = a + 1; b < 3; ++b )
if( arr[a] > arr[b] ) { fp_t t = arr[a]; arr[a] = arr[b]; arr[b] = t; }
fp_t median = arr[1];
if( median == 0 )
y[0][i] = 0;
else
y[0][i] = (x[0][i] / median - 1.0);
}
return 0;
}
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