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Iscle 2022-09-25 00:46:32 +02:00
parent e46f205779
commit b20e30759a
2 changed files with 50 additions and 5 deletions
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53
src/cpp/viper/utils/MinPhaseIIRCoeffs.cpp
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@ -105,10 +105,10 @@ MinPhaseIIRCoeffs::~MinPhaseIIRCoeffs() {
delete this->coeffs; delete this->coeffs;
} }
void MinPhaseIIRCoeffs::Find_F1_F2(double param_2, double param_3, double *parma_4, double *param_5) { void MinPhaseIIRCoeffs::Find_F1_F2(double param_2, double param_3, double *param_4, double *param_5) {
double x = pow(2.0, param_3 / 2.0); double x = pow(2.0, param_3 / 2.0);
*param_5 = param_2 / x; *param_5 = param_2 / x;
*parma_4 = param_2 * x; *param_4 = param_2 * x;
} }
float *MinPhaseIIRCoeffs::GetCoefficients() { float *MinPhaseIIRCoeffs::GetCoefficients() {
@ -159,7 +159,52 @@ int MinPhaseIIRCoeffs::UpdateCoeffs(uint32_t freqs, int samplingRate) {
this->samplingRate = samplingRate; this->samplingRate = samplingRate;
delete this->coeffs; delete this->coeffs;
this->coeffs = new float[freqs * 5]; this->coeffs = new float[freqs * 4]();
return 0; const float *coeffsArray;
double tmp;
switch (freqs) {
case 10:
coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_10;
tmp = 3.0 / 3.0;
break;
case 15:
coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_15;
tmp = 2.0 / 3.0;
break;
case 25:
coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_25;
tmp = 1.0 / 3.0;
break;
case 31:
coeffsArray = MIN_PHASE_IIR_COEFFS_FREQ_31;
tmp = 1.0 / 3.0;
break;
}
for (uint32_t i = 0; i < freqs; i++) {
double ret1;
double ret2;
this->Find_F1_F2(coeffsArray[i], tmp, &ret1, &ret2);
double x = (2.0 * M_PI * (double) coeffsArray[i]) / (double) this->samplingRate;
double y = (2.0 * M_PI * ret2) / (double) this->samplingRate;
double cosX = cos(x);
double cosY = cos(y);
double sinY = sin(y);
double a = cosX * cosY;
double b = pow(cosX, 2.0) / 2.0;
double c = pow(sinY, 2.0);
if (this->SolveRoot(((b - a) + 0.5) - c, c + (((b + pow(cosY, 2.0)) - a) - 0.5), ((pow(cosX, 2.0) / 8.0 - cosX * cosY / 4.0) + 0.125) - c / 4.0, &ret1) == 0) {
this->coeffs[4 * i] = (float) (ret1 * 2.0);
this->coeffs[4 * i + 1] = (float) (0.5 - ret1);
this->coeffs[4 * i + 2] = (float) ((ret1 + 0.5) * cosX);
}
}
return 1;
} }

2
src/cpp/viper/utils/MinPhaseIIRCoeffs.h
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@ -7,7 +7,7 @@ public:
MinPhaseIIRCoeffs(); MinPhaseIIRCoeffs();
~MinPhaseIIRCoeffs(); ~MinPhaseIIRCoeffs();
void Find_F1_F2(double param_2, double param_3, double *parma_4, double *param_5); void Find_F1_F2(double param_2, double param_3, double *param_4, double *param_5);
float *GetCoefficients(); float *GetCoefficients();
float GetIndexFrequency(uint32_t param_1); float GetIndexFrequency(uint32_t param_1);
int SolveRoot(double param_2, double param_3, double param_4, double *param_5); int SolveRoot(double param_2, double param_3, double param_4, double *param_5);