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Drop phase measurement as they're kinda useless.

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This commit is contained in:
Themaister 2012-02-27 21:13:27 +01:00
parent a4b3fbcebe
commit 2fecfc7fca
1 changed files with 3 additions and 7 deletions
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10
audio/test/snr.c
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@ -37,7 +37,6 @@ struct snr_result
{ {
double snr; double snr;
double gain; double gain;
double phase;
}; };
static unsigned bitrange(unsigned len) static unsigned bitrange(unsigned len)
@ -154,10 +153,7 @@ static void calculate_snr(struct snr_result *res,
samples >>= 1; samples >>= 1;
calculate_fft(resamp, butterfly_buf, samples); calculate_fft(resamp, butterfly_buf, samples);
complex double phase = butterfly_buf[in_rate]; double signal = cabs(butterfly_buf[in_rate] * butterfly_buf[in_rate]);
res->phase = carg(phase);
double signal = cabs(phase * phase);
butterfly_buf[in_rate] = 0.0; butterfly_buf[in_rate] = 0.0;
double noise = 0.0; double noise = 0.0;
@ -261,8 +257,8 @@ int main(int argc, char *argv[])
struct snr_result res; struct snr_result res;
calculate_snr(&res, freq_list[i], output, butterfly_buf, fft_samples * 2); calculate_snr(&res, freq_list[i], output, butterfly_buf, fft_samples * 2);
printf("SNR @ %5u Hz: %6.2lf dB, Gain: %6.1lf dB, Phase: %6.4f rad\n", printf("SNR @ %5u Hz: %6.2lf dB, Gain: %6.1lf dB\n",
freq_list[i], res.snr, res.gain, res.phase); freq_list[i], res.snr, res.gain);
} }
resampler_free(re); resampler_free(re);