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Code Issues Releases Activity

avfilter/af_afftdn: remove excessive operations

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This commit is contained in:
Paul B Mahol
2022-03-15 19:08:43 +01:00
parent ffff5bb740
commit 77d20a0f74
1 changed files with 4 additions and 5 deletions
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9
libavfilter/af_afftdn.c
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@@ -363,7 +363,7 @@ static void process_frame(AVFilterContext *ctx,
int n = 0, i1; int n = 0, i1;
for (int i = 0; i < s->fft_length2; i++) { for (int i = 0; i < s->fft_length2; i++) {
double new_gain, mag, mag_abs_var, new_mag_abs_var; double sqr_new_gain, new_gain, mag, mag_abs_var, new_mag_abs_var;
mag = fft_data[i].re * fft_data[i].re + fft_data[i].im * fft_data[i].im; mag = fft_data[i].re * fft_data[i].re + fft_data[i].im * fft_data[i].im;
if (mag > sample_floor) if (mag > sample_floor)
@@ -373,10 +373,9 @@ static void process_frame(AVFilterContext *ctx,
mag_abs_var = mag / abs_var[i]; mag_abs_var = mag / abs_var[i];
new_mag_abs_var = ratio * prior[i] + rratio * fmax(mag_abs_var - 1.0, 0.0); 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_mag_abs_var / (1.0 + new_mag_abs_var);
new_gain *= (new_gain + M_PI_4 / fmax(mag_abs_var, 1.0E-6)); sqr_new_gain = new_gain * new_gain;
prior[i] = mag_abs_var * new_gain; prior[i] = mag_abs_var * sqr_new_gain;
dnch->clean_data[i] = mag * new_gain; dnch->clean_data[i] = mag * sqr_new_gain;
new_gain = sqrt(new_gain);
gain[i] = new_gain; gain[i] = new_gain;
} }