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avfilter: fix highshelf zdf coefficients

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This commit is contained in:
Paul B Mahol 2023-08-07 11:55:13 +02:00
parent e35dfe864d
commit d295b6b693
2 changed files with 2 additions and 2 deletions
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2
libavfilter/adynamicequalizer_template.c
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@ -238,7 +238,7 @@ static int fn(filter_channels)(AVFilterContext *ctx, void *arg, int jobnr, int n
break; break;
case 2: case 2:
k = itqfactor; k = itqfactor;
g = fg / SQRT(gain); g = fg * SQRT(gain);
fa[0] = ONE / (ONE + g * (g + k)); fa[0] = ONE / (ONE + g * (g + k));
fa[1] = g * fa[0]; fa[1] = g * fa[0];

2
libavfilter/af_biquads.c
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@ -722,7 +722,7 @@ static void convert_dir2zdf(BiquadsContext *s, int sample_rate)
case treble: case treble:
case highshelf: case highshelf:
A = ff_exp10(s->gain / 40.); A = ff_exp10(s->gain / 40.);
g = tan(M_PI * s->frequency / sample_rate) / sqrt(A); g = tan(M_PI * s->frequency / sample_rate) * sqrt(A);
k = 1. / Q; k = 1. / Q;
a[0] = 1. / (1. + g * (g + k)); a[0] = 1. / (1. + g * (g + k));
a[1] = g * a[0]; a[1] = g * a[0];