95 lines
3.3 KiB
C#
95 lines
3.3 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 PcmHelper
|
|
{
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static int GetCountToDecode(int startSampleOffset, int endSampleOffset, int offset, int count)
|
|
{
|
|
return Math.Min(count, endSampleOffset - startSampleOffset - offset);
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static ulong GetBufferOffset<T>(int startSampleOffset, int offset, int channelCount) where T : unmanaged
|
|
{
|
|
return (ulong)(Unsafe.SizeOf<T>() * channelCount * (startSampleOffset + offset));
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static int GetBufferSize<T>(int startSampleOffset, int endSampleOffset, int offset, int count) where T : unmanaged
|
|
{
|
|
return GetCountToDecode(startSampleOffset, endSampleOffset, offset, count) * Unsafe.SizeOf<T>();
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static int Decode(Span<short> output, ReadOnlySpan<short> input, int startSampleOffset, int endSampleOffset, int channelIndex, int channelCount)
|
|
{
|
|
if (input.IsEmpty || endSampleOffset < startSampleOffset)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int decodedCount = input.Length / channelCount;
|
|
|
|
for (int i = 0; i < decodedCount; i++)
|
|
{
|
|
output[i] = input[i * channelCount + channelIndex];
|
|
}
|
|
|
|
return decodedCount;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static int Decode(Span<short> output, ReadOnlySpan<float> input, int startSampleOffset, int endSampleOffset, int channelIndex, int channelCount)
|
|
{
|
|
if (input.IsEmpty || endSampleOffset < startSampleOffset)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int decodedCount = input.Length / channelCount;
|
|
|
|
for (int i = 0; i < decodedCount; i++)
|
|
{
|
|
output[i] = (short)(input[i * channelCount + channelIndex] * short.MaxValue);
|
|
}
|
|
|
|
return decodedCount;
|
|
}
|
|
|
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
|
public static short Saturate(float value)
|
|
{
|
|
if (value > short.MaxValue)
|
|
{
|
|
return short.MaxValue;
|
|
}
|
|
|
|
if (value < short.MinValue)
|
|
{
|
|
return short.MinValue;
|
|
}
|
|
|
|
return (short)value;
|
|
}
|
|
}
|
|
}
|