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Use SIMD acceleration for audio upsampler (#4410)

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* Use SIMD acceleration for audio upsampler filter kernel for a moderate speedup

* Address formatting. Implement AVX2 fast path for high quality resampling in ResamplerHelper

* now really, are we really getting the benefit of inlining 50+ line methods?

* adding unit tests for resampler + upsampler. The upsampler ones fail for some reason

* Fixing upsampler test. Apparently this algo only works at specific ratios

---------

Co-authored-by: Logan Stromberg <lostromb@microsoft.com>
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Logan Stromberg 2023-02-21 02:44:57 -08:00 • committed by GitHub
parent fc43aecbbd
commit edfd4d70c0
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4 changed files with 279 additions and 84 deletions
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23
Ryujinx.Audio/Renderer/Dsp/UpsamplerHelper.cs
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@ -2,6 +2,7 @@ using Ryujinx.Audio.Renderer.Server.Upsampler;
using Ryujinx.Common.Memory;
using System;
using System.Diagnostics;
using System.Numerics;
using System.Runtime.CompilerServices;
namespace Ryujinx.Audio.Renderer.Dsp
@ -70,16 +71,32 @@ namespace Ryujinx.Audio.Renderer.Dsp
return;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
float DoFilterBank(ref UpsamplerBufferState state, in Array20<float> bank)
{
float result = 0.0f;
Debug.Assert(state.History.Length == HistoryLength);
Debug.Assert(bank.Length == FilterBankLength);
for (int j = 0; j < FilterBankLength; j++)
int curIdx = 0;
if (Vector.IsHardwareAccelerated)
{
result += bank[j] * state.History[j];
// Do SIMD-accelerated block operations where possible.
// Only about a 2x speedup since filter bank length is short
int stopIdx = FilterBankLength - (FilterBankLength % Vector<float>.Count);
while (curIdx < stopIdx)
{
result += Vector.Dot(
new Vector<float>(bank.AsSpan().Slice(curIdx, Vector<float>.Count)),
new Vector<float>(state.History.AsSpan().Slice(curIdx, Vector<float>.Count)));
curIdx += Vector<float>.Count;
}
}
while (curIdx < FilterBankLength)
{
result += bank[curIdx] * state.History[curIdx];
curIdx++;
}
return result;