Log linear spacing

log_linear.cpp

#include <iostream>
#include <iterator>
#include <algorithm>
#include <vector>
#include <cmath>

std::vector<float> make_log_linear(size_t n,
                                   int linear,
                                   int subbin) {
    std::vector<float> result;

    float inc = std::ldexp(1.0f, linear - subbin);

    float val = 0.0f;

    size_t i = 0;
    size_t subbins = 1 << subbin;

    while(i < n) {
        for(int j = 0; j < subbins; j++) {
            result.push_back(val);
            val += inc;
            i++;
        }
        inc *= 2.0f;
    }
    return result;
}


int main() {
    std::vector<float> result = make_log_linear(16, 4, 2);
    std::ostream_iterator<float> os(std::cout, ", ");
    std::copy(result.begin(), result.end(), os);
    std::cout << std::endl;
}

$ g++ log_linear.cpp
$ ./a.out
$ 0, 4, 8, 12, 16, 24, 32, 40, 48, 64, 80, 96, 112, 144, 176, 208,