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TSR Berry 2023-04-08 01:22:00 +02:00 • committed by Mary
parent cd124bda58
commit cee7121058
3466 changed files with 55 additions and 55 deletions
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src/Ryujinx.Audio/Renderer/Dsp/State/DelayState.cs Normal file
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using Ryujinx.Audio.Renderer.Dsp.Effect;
using Ryujinx.Audio.Renderer.Parameter.Effect;
using System.Runtime.CompilerServices;
namespace Ryujinx.Audio.Renderer.Dsp.State
{
public class DelayState
{
public DelayLine[] DelayLines { get; }
public float[] LowPassZ { get; set; }
public float FeedbackGain { get; private set; }
public float DelayFeedbackBaseGain { get; private set; }
public float DelayFeedbackCrossGain { get; private set; }
public float LowPassFeedbackGain { get; private set; }
public float LowPassBaseGain { get; private set; }
private const int FixedPointPrecision = 14;
public DelayState(ref DelayParameter parameter, ulong workBuffer)
{
DelayLines = new DelayLine[parameter.ChannelCount];
LowPassZ = new float[parameter.ChannelCount];
uint sampleRate = (uint)FixedPointHelper.ToInt(parameter.SampleRate, FixedPointPrecision) / 1000;
for (int i = 0; i < DelayLines.Length; i++)
{
DelayLines[i] = new DelayLine(sampleRate, parameter.DelayTimeMax);
DelayLines[i].SetDelay(parameter.DelayTime);
}
UpdateParameter(ref parameter);
}
public void UpdateParameter(ref DelayParameter parameter)
{
FeedbackGain = FixedPointHelper.ToFloat(parameter.FeedbackGain, FixedPointPrecision) * 0.98f;
float channelSpread = FixedPointHelper.ToFloat(parameter.ChannelSpread, FixedPointPrecision);
DelayFeedbackBaseGain = (1.0f - channelSpread) * FeedbackGain;
if (parameter.ChannelCount == 4 || parameter.ChannelCount == 6)
{
DelayFeedbackCrossGain = channelSpread * 0.5f * FeedbackGain;
}
else
{
DelayFeedbackCrossGain = channelSpread * FeedbackGain;
}
LowPassFeedbackGain = 0.95f * FixedPointHelper.ToFloat(parameter.LowPassAmount, FixedPointPrecision);
LowPassBaseGain = 1.0f - LowPassFeedbackGain;
}
public void UpdateLowPassFilter(ref float tempRawRef, uint channelCount)
{
for (int i = 0; i < channelCount; i++)
{
float lowPassResult = LowPassFeedbackGain * LowPassZ[i] + Unsafe.Add(ref tempRawRef, i) * LowPassBaseGain;
LowPassZ[i] = lowPassResult;
DelayLines[i].Update(lowPassResult);
}
}
}
}