63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
#include <cstdlib>
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#include <cstring>
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#include <cstdio>
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#include <cmath>
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#include "common/wave.h"
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#include "ft8/pack.h"
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#include "ft8/encode.h"
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#include "ft8/pack_v2.h"
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#include "ft8/encode_v2.h"
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#include "ft8/ldpc.h"
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#include "fft/kiss_fftr.h"
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void usage() {
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printf("Decode a 15-second WAV file.\n");
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}
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float hann_i(int i, int N) {
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float x = sinf((float)M_PI * i / (N - 1));
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return x*x;
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}
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int main(int argc, char **argv) {
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// Expect one command-line argument
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if (argc < 2) {
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usage();
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return -1;
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}
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const char *wav_path = argv[1];
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int sample_rate = 12000;
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int num_samples = 15 * sample_rate;
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float signal[num_samples];
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int rc = load_wav(signal, num_samples, sample_rate, wav_path);
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if (rc < 0) {
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return -1;
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}
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//return 0;
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const int nfft = 2 * (int)(sample_rate / 6.25); // 2 bins per FSK tone
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size_t fft_work_size;
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kiss_fftr_alloc(nfft, 0, 0, &fft_work_size);
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printf("N_FFT = %d\n", nfft);
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printf("FFT work area = %lu\n", fft_work_size);
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void *fft_work = malloc(fft_work_size);
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kiss_fftr_cfg fft_cfg = kiss_fftr_alloc(nfft, 0, fft_work, &fft_work_size);
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kiss_fft_scalar timedata[nfft];
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kiss_fft_cpx freqdata[nfft/2 + 1];
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kiss_fftr(fft_cfg, timedata, freqdata);
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return 0;
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} |