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ryujinx-final/Ryujinx.Audio.Renderer/Dsp/Command/MixRampCommand.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/>.
//
using Ryujinx.Audio.Renderer.Common;
using System;
namespace Ryujinx.Audio.Renderer.Dsp.Command
{
public class MixRampCommand : ICommand
{
public bool Enabled { get; set; }
public int NodeId { get; }
public CommandType CommandType => CommandType.MixRamp;
public ulong EstimatedProcessingTime { get; set; }
public ushort InputBufferIndex { get; }
public ushort OutputBufferIndex { get; }
public float Volume0 { get; }
public float Volume1 { get; }
public Memory<VoiceUpdateState> State { get; }
public int LastSampleIndex { get; }
public MixRampCommand(float volume0, float volume1, uint inputBufferIndex, uint outputBufferIndex, int lastSampleIndex, Memory<VoiceUpdateState> state, int nodeId)
{
Enabled = true;
NodeId = nodeId;
InputBufferIndex = (ushort)inputBufferIndex;
OutputBufferIndex = (ushort)outputBufferIndex;
Volume0 = volume0;
Volume1 = volume1;
State = state;
LastSampleIndex = lastSampleIndex;
}
private float ProcessMixRamp(Span<float> outputBuffer, ReadOnlySpan<float> inputBuffer, int sampleCount)
{
float ramp = (Volume1 - Volume0) / sampleCount;
float volume = Volume0;
float state = 0;
for (int i = 0; i < sampleCount; i++)
{
state = FloatingPointHelper.MultiplyRoundUp(inputBuffer[i], volume);
outputBuffer[i] += state;
volume += ramp;
}
return state;
}
public void Process(CommandList context)
{
ReadOnlySpan<float> inputBuffer = context.GetBuffer(InputBufferIndex);
Span<float> outputBuffer = context.GetBuffer(OutputBufferIndex);
State.Span[0].LastSamples[LastSampleIndex] = ProcessMixRamp(outputBuffer, inputBuffer, (int)context.SampleCount);
}
}
}