74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
|
|
||
|
|
#ifndef OPENAV_DSP_DBMETER_H
|
||
|
|
#define OPENAV_DSP_DBMETER_H
|
||
|
|
|
||
|
|
|
||
|
|
#include <math.h>
|
||
|
|
#include <cmath>
|
||
|
|
#include <cstdlib>
|
||
|
|
|
||
|
|
float fabsf(float dummy0);
|
||
|
|
float log10f(float dummy0);
|
||
|
|
|
||
|
|
class DBMeter
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
DBMeter(int rate)
|
||
|
|
{
|
||
|
|
fSamplingFreq = rate;
|
||
|
|
fConst0 = (96.f / float(min(192000, max(1, fSamplingFreq))));
|
||
|
|
|
||
|
|
fRec0[0] = -96.f;
|
||
|
|
fRec0[1] = -96.f;
|
||
|
|
fRec1[0] = -96.f;
|
||
|
|
fRec1[1] = -96.f;
|
||
|
|
}
|
||
|
|
|
||
|
|
int getNumInputs() { return 2;}
|
||
|
|
int getNumOutputs(){ return 2;}
|
||
|
|
|
||
|
|
// call this to get the current dB value, range = -96 -> +10
|
||
|
|
float getLeftDB()
|
||
|
|
{
|
||
|
|
return fvbargraph0;
|
||
|
|
}
|
||
|
|
float getRightDB()
|
||
|
|
{
|
||
|
|
return fvbargraph1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void process(int count, float** inputs, float** outputs)
|
||
|
|
{
|
||
|
|
float* input0 = inputs[0];
|
||
|
|
float* input1 = inputs[1];
|
||
|
|
float* output0 = outputs[0];
|
||
|
|
float* output1 = outputs[1];
|
||
|
|
for (int i = 0; (i < count); i = (i + 1))
|
||
|
|
{
|
||
|
|
float fTemp0 = float(input0[i]);
|
||
|
|
fRec0[0] = max((fRec0[1] - fConst0), min(10.f, (20.f * log10f(max(1.58489e-05f, fabsf(fTemp0))))));
|
||
|
|
fvbargraph0 = fRec0[0];
|
||
|
|
output0[i] = float(fTemp0);
|
||
|
|
|
||
|
|
float fTemp1 = float(input1[i]);
|
||
|
|
fRec1[0] = max((fRec1[1] - fConst0), min(10.f, (20.f * log10f(max(1.58489e-05f, fabsf(fTemp1))))));
|
||
|
|
fvbargraph1 = fRec1[0];
|
||
|
|
output1[i] = float(fTemp1);
|
||
|
|
|
||
|
|
fRec0[1] = fRec0[0];
|
||
|
|
fRec1[1] = fRec1[0];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
float fRec0[2];
|
||
|
|
float fRec1[2];
|
||
|
|
int fSamplingFreq;
|
||
|
|
float fConst0;
|
||
|
|
float fvbargraph0;
|
||
|
|
float fvbargraph1;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // OPENAV_DSP_DBMETER_H
|
||
|
|
|