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using Ryujinx.Audio.Renderer.Dsp.Effect;
using Ryujinx.Audio.Renderer.Dsp.State;
using Ryujinx.Audio.Renderer.Parameter.Effect;
using Ryujinx.Audio.Renderer.Server.Effect;
using System;
using System.Diagnostics;
namespace Ryujinx.Audio.Renderer.Dsp.Command
{
public class CompressorCommand : ICommand
{
private const int FixedPointPrecision = 15;
public bool Enabled { get; set; }
public int NodeId { get; }
public CommandType CommandType => CommandType.Compressor;
public uint EstimatedProcessingTime { get; set; }
public CompressorParameter Parameter => _parameter;
public Memory<CompressorState> State { get; }
public ushort[] OutputBufferIndices { get; }
public ushort[] InputBufferIndices { get; }
public bool IsEffectEnabled { get; }
private CompressorParameter _parameter;
public CompressorCommand(uint bufferOffset, CompressorParameter parameter, Memory<CompressorState> state, bool isEnabled, int nodeId)
{
Enabled = true;
NodeId = nodeId;
_parameter = parameter;
State = state;
IsEffectEnabled = isEnabled;
InputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
OutputBufferIndices = new ushort[Constants.VoiceChannelCountMax];
for (int i = 0; i < _parameter.ChannelCount; i++)
{
InputBufferIndices[i] = (ushort)(bufferOffset + _parameter.Input[i]);
OutputBufferIndices[i] = (ushort)(bufferOffset + _parameter.Output[i]);
}
}
public void Process(CommandList context)
{
ref CompressorState state = ref State.Span[0];
if (IsEffectEnabled)
{
if (_parameter.Status == UsageState.Invalid)
{
state = new CompressorState(ref _parameter);
}
else if (_parameter.Status == UsageState.New)
{
state.UpdateParameter(ref _parameter);
}
}
ProcessCompressor(context, ref state);
}
private unsafe void ProcessCompressor(CommandList context, ref CompressorState state)
{
Debug.Assert(_parameter.IsChannelCountValid());
if (IsEffectEnabled && _parameter.IsChannelCountValid())
{
Span<IntPtr> inputBuffers = stackalloc IntPtr[Parameter.ChannelCount];
Span<IntPtr> outputBuffers = stackalloc IntPtr[Parameter.ChannelCount];
Span<float> channelInput = stackalloc float[Parameter.ChannelCount];
ExponentialMovingAverage inputMovingAverage = state.InputMovingAverage;
float unknown4 = state.Unknown4;
ExponentialMovingAverage compressionGainAverage = state.CompressionGainAverage;
float previousCompressionEmaAlpha = state.PreviousCompressionEmaAlpha;
for (int i = 0; i < _parameter.ChannelCount; i++)
{
inputBuffers[i] = context.GetBufferPointer(InputBufferIndices[i]);
outputBuffers[i] = context.GetBufferPointer(OutputBufferIndices[i]);
}
for (int sampleIndex = 0; sampleIndex < context.SampleCount; sampleIndex++)
{
for (int channelIndex = 0; channelIndex < _parameter.ChannelCount; channelIndex++)
{
channelInput[channelIndex] = *((float*)inputBuffers[channelIndex] + sampleIndex);
}
float newMean = inputMovingAverage.Update(FloatingPointHelper.MeanSquare(channelInput), _parameter.InputGain);
float y = FloatingPointHelper.Log10(newMean) * 10.0f;
float z = 1.0f;
bool unknown10OutOfRange = y >= state.Unknown10;
if (newMean < 1.0e-10f)
{
y = -100.0f;
unknown10OutOfRange = state.Unknown10 <= -100.0f;
}
if (unknown10OutOfRange)
{
float tmpGain;
if (y >= state.Unknown14)
{
tmpGain = ((1.0f / Parameter.Ratio) - 1.0f) * (y - Parameter.Threshold);
}
else
{
tmpGain = (y - state.Unknown10) * ((y - state.Unknown10) * -state.CompressorGainReduction);
}
z = FloatingPointHelper.DecibelToLinear(tmpGain);
}
float unknown4New = z;
float compressionEmaAlpha;
if ((unknown4 - z) <= 0.08f)
{
compressionEmaAlpha = Parameter.ReleaseCoefficient;
if ((unknown4 - z) >= -0.08f)
{
if (MathF.Abs(compressionGainAverage.Read() - z) >= 0.001f)
{
unknown4New = unknown4;
}
compressionEmaAlpha = previousCompressionEmaAlpha;
}
}
else
{
compressionEmaAlpha = Parameter.AttackCoefficient;
}
float compressionGain = compressionGainAverage.Update(z, compressionEmaAlpha);
for (int channelIndex = 0; channelIndex < Parameter.ChannelCount; channelIndex++)
{
*((float*)outputBuffers[channelIndex] + sampleIndex) = channelInput[channelIndex] * compressionGain * state.OutputGain;
}
unknown4 = unknown4New;
previousCompressionEmaAlpha = compressionEmaAlpha;
}
state.InputMovingAverage = inputMovingAverage;
state.Unknown4 = unknown4;
state.CompressionGainAverage = compressionGainAverage;
state.PreviousCompressionEmaAlpha = previousCompressionEmaAlpha;
}
else
{
for (int i = 0; i < Parameter.ChannelCount; i++)
{
if (InputBufferIndices[i] != OutputBufferIndices[i])
{
context.CopyBuffer(OutputBufferIndices[i], InputBufferIndices[i]);
}
}
}
}
}
}
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