libsndfile usage

gistfile1.cpp

#include <cstdio>
#include <vector>

#include <sndfile.h>

using namespace std;

int main() {
    SF_INFO sfinfo;
    const int BUF_LEN = 2048;
    double buffer[BUF_LEN];

    SNDFILE* f = sf_open("/Users/udalov/c/ch24/PreEC/input/P/1.wav", SFM_READ, &sfinfo);

    int read;
    vector<double> data;
    while ((read = sf_read_double(f, buffer, BUF_LEN))) {
        for (int i = 0; i < read; i++) {
            data.push_back(buffer[i]);
        }
    }

    printf("Sample rate: %d\n", sfinfo.samplerate);
    printf("Samples: %lu\n", data.size());
    for (size_t i = 0; i < data.size(); i++) {
        printf("%.3lf\n", data[i]);
    }

    return 0;
}