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Changed softfloat call in audio

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Dimitris Panokostas 2020-06-29 08:22:10 +02:00
parent 558bc5a2e4
commit d4c7c83a2c
1 changed files with 1 additions and 3 deletions
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4
src/audio.cpp
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@ -1078,8 +1078,6 @@ static int sound_prefs_changed(void)
return 0;
}
double softfloat_tan(double v);
/* This computes the 1st order low-pass filter term b0.
* The a1 term is 1.0 - b0. The center frequency marks the -3 dB point. */
#ifndef M_PI
@ -1095,7 +1093,7 @@ static float rc_calculate_a0(int sample_rate, int cutoff_freq)
/* Compensate for the bilinear transformation. This allows us to specify the
* stop frequency more exactly, but the filter becomes less steep further
* from stopband. */
omega = softfloat_tan(omega / 2.0) * 2.0;
omega = tan(omega / 2.0) * 2.0;
const float out = 1.0 / (1.0 + 1.0 / omega);
return out;
}