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This commit is contained in:
Themaister 2012-02-27 21:34:31 +01:00
parent 2fecfc7fca
commit c975145914
1 changed files with 10 additions and 34 deletions
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44
audio/test/snr.c
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@ -185,36 +185,11 @@ int main(int argc, char *argv[])
return 1;
}
static const unsigned freq_list[] = {
30, 50,
100, 150,
200, 250,
300, 350,
400, 450,
500, 550,
600, 650,
700, 800,
900, 1000,
1100, 1200,
1300, 1500,
1600, 1700,
1800, 1900,
2000, 2100,
2200, 2300,
2500, 3000,
3500, 4000,
4500, 5000,
5500, 6000,
6500, 7000,
7500, 8000,
9000, 9500,
10000, 11000,
12000, 13000,
14000, 15000,
16000, 17000,
18000, 19000,
20000, 21000,
22000,
static const float freq_list[] = {
0.001, 0.002, 0.003, 0.004, 0.005, 0.008,
0.010, 0.015, 0.020, 0.025, 0.030, 0.035, 0.040, 0.045, 0.050,
0.10, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45,
0.46, 0.47, 0.48, 0.49, 0.495,
};
unsigned samples = in_rate * 2;
@ -230,9 +205,10 @@ int main(int argc, char *argv[])
test_fft();
for (unsigned i = 0; i < sizeof(freq_list) / sizeof(freq_list[0]) && freq_list[i] < 0.5f * in_rate; i++)
for (unsigned i = 0; i < sizeof(freq_list) / sizeof(freq_list[0]); i++)
{
double omega = 2.0 * M_PI * freq_list[i] / in_rate;
unsigned freq = freq_list[i] * in_rate;
double omega = 2.0 * M_PI * freq / in_rate;
double sample_offset;
resampler_preinit(re, omega, &sample_offset);
gen_signal(input, omega, sample_offset, samples);
@ -255,9 +231,9 @@ int main(int argc, char *argv[])
}
struct snr_result res;
calculate_snr(&res, freq_list[i], output, butterfly_buf, fft_samples * 2);
calculate_snr(&res, freq, output, butterfly_buf, fft_samples * 2);
printf("SNR @ %5u Hz: %6.2lf dB, Gain: %6.1lf dB\n",
printf("SNR @ w = %5.3f : %6.2lf dB, Gain: %6.1lf dB\n",
freq_list[i], res.snr, res.gain);
}