Ryujinx/Ryujinx.Audio.Renderer/Dsp/FixedPointHelper.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 System.Runtime.CompilerServices;
namespace Ryujinx.Audio.Renderer.Dsp
{
public static class FixedPointHelper
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int ToInt(long value, int qBits)
{
return (int)(value >> qBits);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float ToFloat(long value, int qBits)
{
return (float)value / (1 << qBits);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int ToFixed(float value, int qBits)
{
return (int)(value * (1 << qBits));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int RoundUpAndToInt(long value, int qBits)
{
int half = 1 << (qBits - 1);
return ToInt(value + half, qBits);
}
}
}