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using Ryujinx.Audio.Renderer.Dsp.State;
using Ryujinx.Audio.Renderer.Parameter;
using Ryujinx.Audio.Renderer.Parameter.Effect;
using Ryujinx.Audio.Renderer.Server.Effect;
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace Ryujinx.Audio.Renderer.Dsp.Command
{
public class LimiterCommandVersion2 : ICommand
{
public bool Enabled { get; set; }
public int NodeId { get; }
public CommandType CommandType => CommandType.LimiterVersion2;
public uint EstimatedProcessingTime { get; set; }
public LimiterParameter Parameter => _parameter;
public Memory<LimiterState> State { get; }
public Memory<EffectResultState> ResultState { get; }
public ulong WorkBuffer { get; }
public ushort[] OutputBufferIndices { get; }
public ushort[] InputBufferIndices { get; }
public bool IsEffectEnabled { get; }
private LimiterParameter _parameter;
public LimiterCommandVersion2(
uint bufferOffset,
LimiterParameter parameter,
Memory<LimiterState> state,
Memory<EffectResultState> resultState,
bool isEnabled,
ulong workBuffer,
int nodeId)
{
Enabled = true;
NodeId = nodeId;
_parameter = parameter;
State = state;
ResultState = resultState;
WorkBuffer = workBuffer;
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 LimiterState state = ref State.Span[0];
if (IsEffectEnabled)
{
if (Parameter.Status == UsageState.Invalid)
{
state = new LimiterState(ref _parameter, WorkBuffer);
}
else if (Parameter.Status == UsageState.New)
{
LimiterState.UpdateParameter(ref _parameter);
}
}
ProcessLimiter(context, ref state);
}
private unsafe void ProcessLimiter(CommandList context, ref LimiterState state)
{
Debug.Assert(Parameter.IsChannelCountValid());
if (IsEffectEnabled && Parameter.IsChannelCountValid())
{
if (!ResultState.IsEmpty && Parameter.StatisticsReset)
{
ref LimiterStatistics statistics = ref MemoryMarshal.Cast<byte, LimiterStatistics>(ResultState.Span[0].SpecificData)[0];
statistics.Reset();
}
Span<IntPtr> inputBuffers = stackalloc IntPtr[Parameter.ChannelCount];
Span<IntPtr> outputBuffers = stackalloc IntPtr[Parameter.ChannelCount];
for (int i = 0; i < Parameter.ChannelCount; i++)
{
inputBuffers[i] = context.GetBufferPointer(InputBufferIndices[i]);
outputBuffers[i] = context.GetBufferPointer(OutputBufferIndices[i]);
}
for (int channelIndex = 0; channelIndex < Parameter.ChannelCount; channelIndex++)
{
for (int sampleIndex = 0; sampleIndex < context.SampleCount; sampleIndex++)
{
float rawInputSample = *((float*)inputBuffers[channelIndex] + sampleIndex);
float inputSample = (rawInputSample / short.MaxValue) * Parameter.InputGain;
float sampleInputMax = Math.Abs(inputSample);
float inputCoefficient = Parameter.ReleaseCoefficient;
if (sampleInputMax > state.DetectorAverage[channelIndex].Read())
{
inputCoefficient = Parameter.AttackCoefficient;
}
float detectorValue = state.DetectorAverage[channelIndex].Update(sampleInputMax, inputCoefficient);
float attenuation = 1.0f;
if (detectorValue > Parameter.Threshold)
{
attenuation = Parameter.Threshold / detectorValue;
}
float outputCoefficient = Parameter.ReleaseCoefficient;
if (state.CompressionGainAverage[channelIndex].Read() > attenuation)
{
outputCoefficient = Parameter.AttackCoefficient;
}
float compressionGain = state.CompressionGainAverage[channelIndex].Update(attenuation, outputCoefficient);
ref float delayedSample = ref state.DelayedSampleBuffer[channelIndex * Parameter.DelayBufferSampleCountMax + state.DelayedSampleBufferPosition[channelIndex]];
float outputSample = delayedSample * compressionGain * Parameter.OutputGain;
*((float*)outputBuffers[channelIndex] + sampleIndex) = outputSample * short.MaxValue;
delayedSample = inputSample;
state.DelayedSampleBufferPosition[channelIndex]++;
while (state.DelayedSampleBufferPosition[channelIndex] >= Parameter.DelayBufferSampleCountMin)
{
state.DelayedSampleBufferPosition[channelIndex] -= Parameter.DelayBufferSampleCountMin;
}
if (!ResultState.IsEmpty)
{
ref LimiterStatistics statistics = ref MemoryMarshal.Cast<byte, LimiterStatistics>(ResultState.Span[0].SpecificData)[0];
statistics.InputMax[channelIndex] = Math.Max(statistics.InputMax[channelIndex], sampleInputMax);
statistics.CompressionGainMin[channelIndex] = Math.Min(statistics.CompressionGainMin[channelIndex], compressionGain);
}
}
}
}
else
{
for (int i = 0; i < Parameter.ChannelCount; i++)
{
if (InputBufferIndices[i] != OutputBufferIndices[i])
{
context.CopyBuffer(OutputBufferIndices[i], InputBufferIndices[i]);
}
}
}
}
}
}
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