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using Ryujinx.Audio.Renderer.Common;
using Ryujinx.Audio.Renderer.Dsp.State;
using Ryujinx.Audio.Renderer.Parameter;
using System;
namespace Ryujinx.Audio.Renderer.Dsp.Command
{
public class MultiTapBiquadFilterAndMixCommand : ICommand
{
public bool Enabled { get; set; }
public int NodeId { get; }
public CommandType CommandType => CommandType.MultiTapBiquadFilterAndMix;
public uint EstimatedProcessingTime { get; set; }
public ushort InputBufferIndex { get; }
public ushort OutputBufferIndex { get; }
private BiquadFilterParameter _parameter0;
private BiquadFilterParameter _parameter1;
public Memory<BiquadFilterState> BiquadFilterState0 { get; }
public Memory<BiquadFilterState> BiquadFilterState1 { get; }
public Memory<BiquadFilterState> PreviousBiquadFilterState0 { get; }
public Memory<BiquadFilterState> PreviousBiquadFilterState1 { get; }
public Memory<VoiceUpdateState> State { get; }
public int LastSampleIndex { get; }
public float Volume0 { get; }
public float Volume1 { get; }
public bool NeedInitialization0 { get; }
public bool NeedInitialization1 { get; }
public bool HasVolumeRamp { get; }
public bool IsFirstMixBuffer { get; }
public MultiTapBiquadFilterAndMixCommand(
float volume0,
float volume1,
uint inputBufferIndex,
uint outputBufferIndex,
int lastSampleIndex,
Memory<VoiceUpdateState> state,
ref BiquadFilterParameter filter0,
ref BiquadFilterParameter filter1,
Memory<BiquadFilterState> biquadFilterState0,
Memory<BiquadFilterState> biquadFilterState1,
Memory<BiquadFilterState> previousBiquadFilterState0,
Memory<BiquadFilterState> previousBiquadFilterState1,
bool needInitialization0,
bool needInitialization1,
bool hasVolumeRamp,
bool isFirstMixBuffer,
int nodeId)
{
Enabled = true;
NodeId = nodeId;
InputBufferIndex = (ushort)inputBufferIndex;
OutputBufferIndex = (ushort)outputBufferIndex;
_parameter0 = filter0;
_parameter1 = filter1;
BiquadFilterState0 = biquadFilterState0;
BiquadFilterState1 = biquadFilterState1;
PreviousBiquadFilterState0 = previousBiquadFilterState0;
PreviousBiquadFilterState1 = previousBiquadFilterState1;
State = state;
LastSampleIndex = lastSampleIndex;
Volume0 = volume0;
Volume1 = volume1;
NeedInitialization0 = needInitialization0;
NeedInitialization1 = needInitialization1;
HasVolumeRamp = hasVolumeRamp;
IsFirstMixBuffer = isFirstMixBuffer;
}
private void UpdateState(Memory<BiquadFilterState> state, Memory<BiquadFilterState> previousState, bool needInitialization)
{
if (needInitialization)
{
// If there is no previous state, initialize to zero.
state.Span[0] = new BiquadFilterState();
}
else if (IsFirstMixBuffer)
{
// This is the first buffer, set previous state to current state.
previousState.Span[0] = state.Span[0];
}
else
{
// Rewind the current state by copying back the previous state.
state.Span[0] = previousState.Span[0];
}
}
public void Process(CommandList context)
{
ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
UpdateState(BiquadFilterState0, PreviousBiquadFilterState0, NeedInitialization0);
UpdateState(BiquadFilterState1, PreviousBiquadFilterState1, NeedInitialization1);
if (HasVolumeRamp)
{
float volume = Volume0;
float ramp = (Volume1 - Volume0) / (int)context.SampleCount;
State.Span[0].LastSamples[LastSampleIndex] = BiquadFilterHelper.ProcessDoubleBiquadFilterAndMixRamp(
ref _parameter0,
ref _parameter1,
ref BiquadFilterState0.Span[0],
ref BiquadFilterState1.Span[0],
outputBuffer,
inputBuffer,
context.SampleCount,
volume,
ramp);
}
else
{
BiquadFilterHelper.ProcessDoubleBiquadFilterAndMix(
ref _parameter0,
ref _parameter1,
ref BiquadFilterState0.Span[0],
ref BiquadFilterState1.Span[0],
outputBuffer,
inputBuffer,
context.SampleCount,
Volume1);
}
}
}
}
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