Ryujinx/Ryujinx.Audio/Renderer/Dsp/Command/DepopForMixBuffersCommand.cs

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using System;
using System.Diagnostics;
using System.Runtime.CompilerServices;
namespace Ryujinx.Audio.Renderer.Dsp.Command
{
public class DepopForMixBuffersCommand : ICommand
{
public bool Enabled { get; set; }
public int NodeId { get; }
public CommandType CommandType => CommandType.DepopForMixBuffers;
public ulong EstimatedProcessingTime { get; set; }
public uint MixBufferOffset { get; }
public uint MixBufferCount { get; }
public float Decay { get; }
public Memory<float> DepopBuffer { get; }
public DepopForMixBuffersCommand(Memory<float> depopBuffer, uint bufferOffset, uint mixBufferCount, int nodeId, uint sampleRate)
{
Enabled = true;
NodeId = nodeId;
MixBufferOffset = bufferOffset;
MixBufferCount = mixBufferCount;
DepopBuffer = depopBuffer;
if (sampleRate == 48000)
{
Decay = 0.962189f;
}
else // if (sampleRate == 32000)
{
Decay = 0.943695f;
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private unsafe float ProcessDepopMix(float* buffer, float depopValue, uint sampleCount)
{
if (depopValue < 0)
{
depopValue = -depopValue;
for (int i = 0; i < sampleCount; i++)
{
depopValue = FloatingPointHelper.MultiplyRoundDown(Decay, depopValue);
buffer[i] -= depopValue;
}
return -depopValue;
}
else
{
for (int i = 0; i < sampleCount; i++)
{
depopValue = FloatingPointHelper.MultiplyRoundDown(Decay, depopValue);
buffer[i] += depopValue;
}
return depopValue;
}
}
public void Process(CommandList context)
{
Span<float> depopBuffer = DepopBuffer.Span;
uint bufferCount = Math.Min(MixBufferOffset + MixBufferCount, context.BufferCount);
for (int i = (int)MixBufferOffset; i < bufferCount; i++)
{
float depopValue = depopBuffer[i];
if (depopValue != 0)
{
unsafe
{
float* buffer = (float*)context.GetBufferPointer(i);
depopBuffer[i] = ProcessDepopMix(buffer, depopValue, context.SampleCount);
}
}
}
}
}
}