Ryujinx/Ryujinx.Audio.Renderer/Dsp/Effect/DecayDelay.cs

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//
// Copyright (c) 2019-2021 Ryujinx
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
namespace Ryujinx.Audio.Renderer.Dsp.Effect
{
public class DecayDelay : IDelayLine
{
private readonly IDelayLine _delayLine;
public uint CurrentSampleCount => _delayLine.CurrentSampleCount;
public uint SampleCountMax => _delayLine.SampleCountMax;
private float _decayRate;
public DecayDelay(IDelayLine delayLine)
{
_decayRate = 0.0f;
_delayLine = delayLine;
}
public void SetDecayRate(float decayRate)
{
_decayRate = decayRate;
}
public float Update(float value)
{
float delayLineValue = _delayLine.Read();
float processedValue = value - (_decayRate * delayLineValue);
return _delayLine.Update(processedValue) + processedValue * _decayRate;
}
public void SetDelay(float delayTime)
{
_delayLine.SetDelay(delayTime);
}
public float Read()
{
return _delayLine.Read();
}
public float TapUnsafe(uint sampleIndex, int offset)
{
return _delayLine.TapUnsafe(sampleIndex, offset);
}
public float Tap(uint sampleIndex)
{
return _delayLine.Tap(sampleIndex);
}
}
}