f556c80d02
* Haydn: Part 1 Based on my reverse of audio 11.0.0. As always, core implementation under LGPLv3 for the same reasons as for Amadeus. This place the bases of a more flexible audio system while making audout & audin accurate. This have the following improvements: - Complete reimplementation of audout and audin. - Audin currently only have a dummy backend. - Dramatically reduce CPU usage by up to 50% in common cases (SoundIO and OpenAL). - Audio Renderer now can output to 5.1 devices when supported. - Audio Renderer init its backend on demand instead of keeping two up all the time. - All backends implementation are now in their own project. - Ryujinx.Audio.Renderer was renamed Ryujinx.Audio and was refactored because of this. As a note, games having issues with OpenAL haven't improved and will not because of OpenAL design (stopping when buffers finish playing causing possible audio "pops" when buffers are very small). * Update for latest hexkyz's edits on Switchbrew * audren: Rollback channel configuration changes * Address gdkchan's comments * Fix typo in OpenAL backend driver * Address last comments * Fix a nit * Address gdkchan's comments
95 lines
2.7 KiB
C#
95 lines
2.7 KiB
C#
//
|
|
// 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 System;
|
|
|
|
namespace Ryujinx.Audio.Renderer.Dsp.Effect
|
|
{
|
|
public class DelayLine : IDelayLine
|
|
{
|
|
private float[] _workBuffer;
|
|
private uint _sampleRate;
|
|
private uint _currentSampleIndex;
|
|
private uint _lastSampleIndex;
|
|
|
|
public uint CurrentSampleCount { get; private set; }
|
|
public uint SampleCountMax { get; private set; }
|
|
|
|
public DelayLine(uint sampleRate, float delayTimeMax)
|
|
{
|
|
_sampleRate = sampleRate;
|
|
SampleCountMax = IDelayLine.GetSampleCount(_sampleRate, delayTimeMax);
|
|
_workBuffer = new float[SampleCountMax];
|
|
|
|
SetDelay(delayTimeMax);
|
|
}
|
|
|
|
private void ConfigureDelay(uint targetSampleCount)
|
|
{
|
|
CurrentSampleCount = Math.Min(SampleCountMax, targetSampleCount);
|
|
_currentSampleIndex = 0;
|
|
|
|
if (CurrentSampleCount == 0)
|
|
{
|
|
_lastSampleIndex = 0;
|
|
}
|
|
else
|
|
{
|
|
_lastSampleIndex = CurrentSampleCount - 1;
|
|
}
|
|
}
|
|
|
|
public void SetDelay(float delayTime)
|
|
{
|
|
ConfigureDelay(IDelayLine.GetSampleCount(_sampleRate, delayTime));
|
|
}
|
|
|
|
public float Read()
|
|
{
|
|
return _workBuffer[_currentSampleIndex];
|
|
}
|
|
|
|
public float Update(float value)
|
|
{
|
|
float output = Read();
|
|
|
|
_workBuffer[_currentSampleIndex++] = value;
|
|
|
|
if (_currentSampleIndex >= _lastSampleIndex)
|
|
{
|
|
_currentSampleIndex = 0;
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
public float TapUnsafe(uint sampleIndex, int offset)
|
|
{
|
|
return IDelayLine.Tap(_workBuffer, (int)_currentSampleIndex, (int)sampleIndex + offset, (int)CurrentSampleCount);
|
|
}
|
|
|
|
public float Tap(uint sampleIndex)
|
|
{
|
|
if (sampleIndex >= CurrentSampleCount)
|
|
{
|
|
sampleIndex = CurrentSampleCount - 1;
|
|
}
|
|
|
|
return TapUnsafe(sampleIndex, -1);
|
|
}
|
|
}
|
|
}
|