mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/af_dynaudnorm: use M_PI
The ad-hoc pi constant has a ludicrous number of digits that offer no value whatsoever. M_PI is more consistent and readable across the codebase. Reviewed-by: Paul B Mahol <onemda@gmail.com> Reviewed-by: Nicolas George <george@nsup.org> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
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@ -227,8 +227,6 @@ static int cqueue_pop(cqueue *q)
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return 0;
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return 0;
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}
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}
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static const double s_pi = 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679;
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static void init_gaussian_filter(DynamicAudioNormalizerContext *s)
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static void init_gaussian_filter(DynamicAudioNormalizerContext *s)
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{
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{
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double total_weight = 0.0;
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double total_weight = 0.0;
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@ -238,7 +236,7 @@ static void init_gaussian_filter(DynamicAudioNormalizerContext *s)
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// Pre-compute constants
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// Pre-compute constants
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const int offset = s->filter_size / 2;
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const int offset = s->filter_size / 2;
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const double c1 = 1.0 / (sigma * sqrt(2.0 * s_pi));
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const double c1 = 1.0 / (sigma * sqrt(2.0 * M_PI));
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const double c2 = 2.0 * pow(sigma, 2.0);
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const double c2 = 2.0 * pow(sigma, 2.0);
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// Compute weights
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// Compute weights
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