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// Midpoint
//
// midpoint
//
// Midpoint over rolling window
//
// (highest_high + lowest_low) / 2
//
// Inputs: 1
// Outputs: 1
// Constants: 1
#include "ts.h"
typedef struct {
uint_t k;
} ts_midpoint_params_t;
ts_parameter_t const ts_midpoint_p = { .n_inputs = 1, .n_outputs = 1, .n_constants = 1, .params_size = sizeof(ts_midpoint_params_t) };
uint_t ts_midpoint_offset( ts_constant_t const *c )
{
( void )c;
return ( c ? ((ts_midpoint_params_t *)c)->k - 1 : 0 );
}
int ts_midpoint(
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_midpoint_p );
if ( !c ) return -1;
uint_t k = ((ts_midpoint_params_t *)c)->k;
if (k == 0 || n < k) return -1;
for( uint_t i = k - 1; i < n; ++i )
{
fp_t max_val = x[0][i];
fp_t min_val = x[0][i];
for( uint_t j = 1; j < k; ++j )
{
fp_t val = x[0][i - j];
if( val > max_val ) max_val = val;
if( val < min_val ) min_val = val;
}
y[0][i] = ( max_val + min_val ) / 2;
}
return 0;
}
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