kopia lustrzana https://github.com/mobilinkd/NucleoTNC
62 wiersze
1.2 KiB
C++
62 wiersze
1.2 KiB
C++
#ifndef MOBILINKD__AGC_H_
|
|
#define MOBILINKD__AGC_H_
|
|
|
|
#include <cmath>
|
|
|
|
namespace mobilinkd { namespace libafsk {
|
|
|
|
template <typename T>
|
|
struct BaseAGC {
|
|
|
|
typedef T float_type;
|
|
float_type attack_;
|
|
float_type decay_;
|
|
float_type reference_;
|
|
float_type max_gain_;
|
|
bool has_max_gain_;
|
|
|
|
float_type gain_;
|
|
|
|
BaseAGC(float_type attack, float_type decay, float_type reference = 1.0)
|
|
: attack_(attack), decay_(decay), reference_(reference)
|
|
, max_gain_(0.0), has_max_gain_(false), gain_(1.0)
|
|
{}
|
|
|
|
BaseAGC(float_type decay, float_type attack, float_type reference, float_type max_gain)
|
|
: attack_(attack), decay_(decay), reference_(reference)
|
|
, max_gain_(max_gain), has_max_gain_(true), gain_(1.0)
|
|
{}
|
|
|
|
float_type operator()(float_type value) {
|
|
|
|
float_type output = value * gain_;
|
|
float_type tmp = fabs(output) - reference_;
|
|
float_type rate = decay_;
|
|
|
|
if (fabs(tmp) > gain_) {
|
|
rate = attack_;
|
|
}
|
|
|
|
gain_ -= tmp * rate;
|
|
|
|
if (gain_ < 0.0f) {
|
|
gain_ = .000001f;
|
|
}
|
|
|
|
if (has_max_gain_ and (gain_ > max_gain_)) {
|
|
gain_ = max_gain_;
|
|
}
|
|
|
|
return output;
|
|
}
|
|
};
|
|
|
|
typedef BaseAGC<double> AGC;
|
|
typedef BaseAGC<float> FastAGC;
|
|
|
|
}} // mobilinkd::libafsk
|
|
|
|
#endif // MOBILINKD__AGC_H_
|
|
|
|
|