ShuriZma
/
BizHawk
mirror of https://github.com/TASEmulators/BizHawk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Emulation.Common - Get rid of unused Equalizer class

This commit is contained in:
adelikat 2017-04-26 08:48:10 -05:00
parent ec545ae3a0
commit 85ceed3b38
2 changed files with 0 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
BizHawk.Emulation.Common/BizHawk.Emulation.Common.csproj
View File

@ -146,7 +146,6 @@
<Compile Include="ServiceInjector.cs" />
<Compile Include="Sound\Utilities\BlipBuffer.cs" />
<Compile Include="Sound\Utilities\DCFilter.cs" />
<Compile Include="Sound\Utilities\Equalizer.cs" />
<Compile Include="Sound\Utilities\ISynchronizingAudioBuffer.cs" />
<Compile Include="Sound\Utilities\Metaspu.cs" />
<Compile Include="Sound\Utilities\SpeexResampler.cs" />

98
BizHawk.Emulation.Common/Sound/Utilities/Equalizer.cs
View File

@ -1,98 +0,0 @@
// C# port of C-based 3-band equalizer (C) Neil C / Etanza Systems / 2006
using System;
namespace BizHawk.Emulation.Common
{
public sealed class Equalizer
{
private double lowFilter;
private double lowFilterPole0;
private double lowFilterPole1;
private double lowFilterPole2;
private double lowFilterPole3;
private double highFilter;
private double highFilterPole0;
private double highFilterPole1;
private double highFilterPole2;
private double highFilterPole3;
private double sampleDataMinus1;
private double sampleDataMinus2;
private double sampleDataMinus3;
private double lowGain;
private double midGain;
private double highGain;
private const double sampleRate = 44100.0;
private const double verySmallAmount = 1.0 / 4294967295.0;
private double lowfreq;
public double LowFreqCutoff
{
get { return lowfreq; }
set
{
lowfreq = value;
lowFilter = 2 * Math.Sin(Math.PI * (lowfreq / sampleRate));
}
}
private double highfreq;
public double HighFreqCutoff
{
get { return highfreq; }
set
{
highfreq = value;
highFilter = 2 * Math.Sin(Math.PI * (highfreq / sampleRate));
}
}
public Equalizer(double lowFreq = 880, double highFreq = 5000)
{
lowGain = 1.3;
midGain = 0.9;
highGain = 1.3;
LowFreqCutoff = lowFreq;
HighFreqCutoff = highFreq;
}
public short EqualizeSample(short sample)
{
lowFilterPole0 += (lowFilter * (sample - lowFilterPole0)) + verySmallAmount;
lowFilterPole1 += lowFilter * (lowFilterPole0 - lowFilterPole1);
lowFilterPole2 += lowFilter * (lowFilterPole1 - lowFilterPole2);
lowFilterPole3 += lowFilter * (lowFilterPole2 - lowFilterPole3);
double l = lowFilterPole3;
highFilterPole0 += (highFilter * (sample - highFilterPole0)) + verySmallAmount;
highFilterPole1 += highFilter * (highFilterPole0 - highFilterPole1);
highFilterPole2 += highFilter * (highFilterPole1 - highFilterPole2);
highFilterPole3 += highFilter * (highFilterPole2 - highFilterPole3);
double h = sampleDataMinus3 - highFilterPole3;
double m = sample - (h + l);
l *= lowGain;
m *= midGain;
h *= highGain;
sampleDataMinus3 = sampleDataMinus2;
sampleDataMinus2 = sampleDataMinus1;
sampleDataMinus1 = sample;
return (short)(l + m + h);
}
public void Equalize(short[] samples)
{
for (int i = 0; i < samples.Length; i++)
{
samples[i] = EqualizeSample(samples[i]);
}
}
}
}