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higuoxing/plotwave.ipynb

Last active June 5, 2021 15:00
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plotwave.ipynb
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wavegen.cc
#include <complex>
#include <vector>
#include <string>
#include <fstream>
#include <algorithm>
#include <iostream>
constexpr double PI = 3.1415926535897;
template <typename T>
class wave_table_t {
public:
wave_table_t(const std::string &wave_type, size_t len, const T ampl)
: _wave_table(len) {
if (wave_type == "SINE") {
static T tau = 2 * PI;
static const std::complex<T> J(0, 1);
for (size_t I = 0; I < len; ++I) {
_wave_table[I] = ampl * std::exp(J * static_cast<T>(tau * I / len));
}
_power_dbfs = static_cast<T>(20 * std::log10(ampl));
}
}
void dump_to_file(const std::string &filename) const {
std::ofstream ofile(filename.c_str(), std::ofstream::binary);
ofile.write((char *)&_wave_table[0], _wave_table.size() * sizeof(std::complex<T>));
ofile.close();
}
private:
T _power_dbfs;
std::vector<std::complex<T>> _wave_table;
};
int main() {
wave_table_t<float> wt("SINE", 1024, 1.0);
wt.dump_to_file("/tmp/mysine.data");
}
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