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avfilter/af_afftdn: rename some variables to less cryptic name

This commit is contained in:
Paul B Mahol 2022-03-13 13:08:23 +01:00
parent b578324b1d
commit 9e279c8c2d
1 changed files with 10 additions and 11 deletions
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21
libavfilter/af_afftdn.c
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@ -326,23 +326,22 @@ static void process_frame(AudioFFTDeNoiseContext *s, DeNoiseChannel *dnch,
double *band_excit = dnch->band_excit;
double *band_amt = dnch->band_amt;
double *gain = dnch->gain;
double d1, d2, d3;
int n = 0, i1;
for (int i = 0; i < s->fft_length2; i++) {
double new_gain;
double new_gain, mag, mag_abs_var, new_mag_abs_var;
d1 = fft_data[i].re * fft_data[i].re + fft_data[i].im * fft_data[i].im;
if (d1 > sample_floor)
mag = fft_data[i].re * fft_data[i].re + fft_data[i].im * fft_data[i].im;
if (mag > sample_floor)
n = i;
dnch->noisy_data[i] = d1;
d2 = d1 / abs_var[i];
d3 = ratio * prior[i] + rratio * fmax(d2 - 1.0, 0.0);
new_gain = d3 / (1.0 + d3);
new_gain *= (new_gain + M_PI_4 / fmax(d2, 1.0E-6));
prior[i] = d2 * new_gain;
dnch->clean_data[i] = d1 * new_gain;
dnch->noisy_data[i] = mag;
mag_abs_var = mag / abs_var[i];
new_mag_abs_var = ratio * prior[i] + rratio * fmax(mag_abs_var - 1.0, 0.0);
new_gain = new_mag_abs_var / (1.0 + new_mag_abs_var);
new_gain *= (new_gain + M_PI_4 / fmax(mag_abs_var, 1.0E-6));
prior[i] = mag_abs_var * new_gain;
dnch->clean_data[i] = mag * new_gain;
new_gain = sqrt(new_gain);
gain[i] = new_gain;
}