ryujinx/Ryujinx.Audio/Renderer/Dsp/FloatingPointHelper.cs
Mary f556c80d02
Haydn: Part 1 (#2007)
* 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
2021-02-26 01:11:56 +01:00

85 lines
2.5 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;
using System.Runtime.CompilerServices;
namespace Ryujinx.Audio.Renderer.Dsp
{
public static class FloatingPointHelper
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float MultiplyRoundDown(float a, float b)
{
return RoundDown(a * b);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float RoundDown(float a)
{
return MathF.Round(a, 0);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float RoundUp(float a)
{
return MathF.Round(a);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float MultiplyRoundUp(float a, float b)
{
return RoundUp(a * b);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float Pow10(float x)
{
// NOTE: Nintendo implementation uses Q15 and a LUT for this, we don't.
// As such, we support the same ranges as Nintendo to avoid unexpected behaviours.
if (x >= 0.0f)
{
return 1.0f;
}
else if (x <= -5.3f)
{
return 0.0f;
}
return MathF.Pow(10, x);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float DegreesToRadians(float degrees)
{
return degrees * MathF.PI / 180.0f;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float Cos(float value)
{
return MathF.Cos(DegreesToRadians(value));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float Sin(float value)
{
return MathF.Sin(DegreesToRadians(value));
}
}
}