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ryujinx-final/Ryujinx.Audio.Renderer/Utils/SpanIOHelper.cs
Mary a389dd59bd
Amadeus: Final Act (#1481)
* Amadeus: Final Act

This is my requiem, I present to you Amadeus, a complete reimplementation of the Audio Renderer!

This reimplementation is based on my reversing of every version of the audio system module that I carried for the past 10 months.
This supports every revision (at the time of writing REV1 to REV8 included) and all features proposed by the Audio Renderer on real hardware.

Because this component could be used outside an emulation context, and to avoid possible "inspirations" not crediting the project, I decided to license the Ryujinx.Audio.Renderer project under LGPLv3.

- FE3H voices in videos and chapter intro are not present.
- Games that use two audio renderer **at the same time** are probably going to have issues right now **until we rewrite the audio output interface** (Crash Team Racing is the only known game to use two renderer at the same time).

- Persona 5 Scrambler now goes ingame but audio is garbage. This is caused by the fact that the game engine is syncing audio and video in a really aggressive way. This will disappears the day this game run at full speed.

* Make timing more precise when sleeping on Windows

Improve precision to a 1ms resolution on Windows NT based OS.
This is used to avoid having totally erratic timings and unify all
Windows users to the same resolution.

NOTE: This is only active when emulation is running.
2020-08-17 22:49:37 -03:00

188 lines
7.5 KiB
C#

//
// Copyright (c) 2019-2020 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.Diagnostics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Audio.Renderer.Utils
{
/// <summary>
/// Helper for IO operations on <see cref="Span{T}"/> and <see cref="Memory{T}"/>.
/// </summary>
public static class SpanIOHelper
{
/// <summary>
/// Write the given data to the given backing <see cref="Memory{T}"/> and move cursor after the written data.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="backingMemory">The backing <see cref="Memory{T}"/> to store the data.</param>
/// <param name="data">The data to write to the backing <see cref="Memory{T}"/>.</param>
public static void Write<T>(ref Memory<byte> backingMemory, ref T data) where T : unmanaged
{
int size = Unsafe.SizeOf<T>();
if (size > backingMemory.Length)
{
throw new ArgumentOutOfRangeException();
}
MemoryMarshal.Write<T>(backingMemory.Span.Slice(0, size), ref data);
backingMemory = backingMemory.Slice(size);
}
/// <summary>
/// Write the given data to the given backing <see cref="Span{T}"/> and move cursor after the written data.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="backingMemory">The backing <see cref="Span{T}"/> to store the data.</param>
/// <param name="data">The data to write to the backing <see cref="Span{T}"/>.</param>
public static void Write<T>(ref Span<byte> backingMemory, ref T data) where T : unmanaged
{
int size = Unsafe.SizeOf<T>();
if (size > backingMemory.Length)
{
throw new ArgumentOutOfRangeException();
}
MemoryMarshal.Write<T>(backingMemory.Slice(0, size), ref data);
backingMemory = backingMemory.Slice(size);
}
/// <summary>
/// Get a <see cref="Span{T}"/> out of a <paramref name="backingMemory"/> and move cursor after T size.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="backingMemory">The backing <see cref="Memory{T}"/> to get a <see cref="Span{T}"/> from.</param>
/// <returns>A <see cref="Span{T}"/> from backing <see cref="Memory{T}"/>.</returns>
public static Span<T> GetWriteRef<T>(ref Memory<byte> backingMemory) where T : unmanaged
{
int size = Unsafe.SizeOf<T>();
if (size > backingMemory.Length)
{
throw new ArgumentOutOfRangeException();
}
Span<T> result = MemoryMarshal.Cast<byte, T>(backingMemory.Span.Slice(0, size));
backingMemory = backingMemory.Slice(size);
return result;
}
/// <summary>
/// Get a <see cref="Span{T}"/> out of a backingMemory and move cursor after T size.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="backingMemory">The backing <see cref="Span{T}"/> to get a <see cref="Span{T}"/> from.</param>
/// <returns>A <see cref="Span{T}"/> from backing <see cref="Span{T}"/>.</returns>
public static Span<T> GetWriteRef<T>(ref Span<byte> backingMemory) where T : unmanaged
{
int size = Unsafe.SizeOf<T>();
if (size > backingMemory.Length)
{
throw new ArgumentOutOfRangeException();
}
Span<T> result = MemoryMarshal.Cast<byte, T>(backingMemory.Slice(0, size));
backingMemory = backingMemory.Slice(size);
return result;
}
/// <summary>
/// Read data from the given backing <see cref="ReadOnlyMemory{T}"/> and move cursor after the read data.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="backingMemory">The backing <see cref="ReadOnlyMemory{T}"/> to read data from.</param>
/// <returns>Return the read data.</returns>
public static T Read<T>(ref ReadOnlyMemory<byte> backingMemory) where T : unmanaged
{
int size = Unsafe.SizeOf<T>();
if (size > backingMemory.Length)
{
throw new ArgumentOutOfRangeException();
}
T result = MemoryMarshal.Read<T>(backingMemory.Span.Slice(0, size));
backingMemory = backingMemory.Slice(size);
return result;
}
/// <summary>
/// Read data from the given backing <see cref="ReadOnlySpan{T}"/> and move cursor after the read data.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="backingMemory">The backing <see cref="ReadOnlySpan{T}"/> to read data from.</param>
/// <returns>Return the read data.</returns>
public static T Read<T>(ref ReadOnlySpan<byte> backingMemory) where T : unmanaged
{
int size = Unsafe.SizeOf<T>();
if (size > backingMemory.Length)
{
throw new ArgumentOutOfRangeException();
}
T result = MemoryMarshal.Read<T>(backingMemory.Slice(0, size));
backingMemory = backingMemory.Slice(size);
return result;
}
/// <summary>
/// Extract a <see cref="Memory{T}"/> at the given index.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="memory">The <see cref="Memory{T}"/> to extract the data from.</param>
/// <param name="id">The id in the provided memory.</param>
/// <param name="count">The max allowed count. (for bound checking of the id in debug mode)</param>
/// <returns>a <see cref="Memory{T}"/> at the given id.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Memory<T> GetMemory<T>(Memory<T> memory, int id, uint count) where T : unmanaged
{
Debug.Assert(id >= 0 && id < count);
return memory.Slice(id, 1);
}
/// <summary>
/// Extract a ref T at the given index.
/// </summary>
/// <typeparam name="T">The data type.</typeparam>
/// <param name="memory">The <see cref="Memory{T}"/> to extract the data from.</param>
/// <param name="id">The id in the provided memory.</param>
/// <param name="count">The max allowed count. (for bound checking of the id in debug mode)</param>
/// <returns>a ref T at the given id.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ref T GetFromMemory<T>(Memory<T> memory, int id, uint count) where T : unmanaged
{
return ref GetMemory(memory, id, count).Span[0];
}
}
}