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using System;
using System.Runtime.InteropServices;
using CpuAddress = System.UInt64;
using DspAddress = System.UInt64;
namespace Ryujinx.Audio.Renderer.Server.MemoryPool
{
/// <summary>
/// Server state for a memory pool.
/// </summary>
[StructLayout(LayoutKind.Sequential, Size = 0x20, Pack = Alignment)]
public struct MemoryPoolState
{
public const int Alignment = 0x10;
/// <summary>
/// The location of the <see cref="MemoryPoolState"/>.
/// </summary>
public enum LocationType : uint
{
/// <summary>
/// <see cref="MemoryPoolState"/> located on the CPU side for user use.
/// </summary>
Cpu,
/// <summary>
/// <see cref="MemoryPoolState"/> located on the DSP side for system use.
/// </summary>
Dsp,
}
/// <summary>
/// The CPU address associated to the <see cref="MemoryPoolState"/>.
/// </summary>
public CpuAddress CpuAddress;
/// <summary>
/// The DSP address associated to the <see cref="MemoryPoolState"/>.
/// </summary>
public DspAddress DspAddress;
/// <summary>
/// The size associated to the <see cref="MemoryPoolState"/>.
/// </summary>
public ulong Size;
/// <summary>
/// The <see cref="LocationType"/> associated to the <see cref="MemoryPoolState"/>.
/// </summary>
public LocationType Location;
/// <summary>
/// Set to true if the <see cref="MemoryPoolState"/> is used.
/// </summary>
[MarshalAs(UnmanagedType.I1)]
public bool IsUsed;
public static unsafe MemoryPoolState* Null => (MemoryPoolState*)IntPtr.Zero.ToPointer();
/// <summary>
/// Create a new <see cref="MemoryPoolState"/> with the given <see cref="LocationType"/>.
/// </summary>
/// <param name="location">The location type to use.</param>
/// <returns>A new <see cref="MemoryPoolState"/> with the given <see cref="LocationType"/>.</returns>
public static MemoryPoolState Create(LocationType location)
{
return new MemoryPoolState
{
CpuAddress = 0,
DspAddress = 0,
Size = 0,
Location = location,
};
}
/// <summary>
/// Set the <see cref="CpuAddress"/> and size of the <see cref="MemoryPoolState"/>.
/// </summary>
/// <param name="cpuAddress">The <see cref="CpuAddress"/>.</param>
/// <param name="size">The size.</param>
public void SetCpuAddress(CpuAddress cpuAddress, ulong size)
{
CpuAddress = cpuAddress;
Size = size;
}
/// <summary>
/// Check if the given <see cref="CpuAddress"/> and size is contains in the <see cref="MemoryPoolState"/>.
/// </summary>
/// <param name="targetCpuAddress">The <see cref="CpuAddress"/>.</param>
/// <param name="size">The size.</param>
/// <returns>True if the <see cref="CpuAddress"/> is contained inside the <see cref="MemoryPoolState"/>.</returns>
public readonly bool Contains(CpuAddress targetCpuAddress, ulong size)
{
if (CpuAddress <= targetCpuAddress && size + targetCpuAddress <= Size + CpuAddress)
{
return true;
}
return false;
}
/// <summary>
/// Translate the given CPU address to a DSP address.
/// </summary>
/// <param name="targetCpuAddress">The <see cref="CpuAddress"/>.</param>
/// <param name="size">The size.</param>
/// <returns>the target DSP address.</returns>
public readonly DspAddress Translate(CpuAddress targetCpuAddress, ulong size)
{
if (Contains(targetCpuAddress, size) && IsMapped())
{
ulong offset = targetCpuAddress - CpuAddress;
return DspAddress + offset;
}
return 0;
}
/// <summary>
/// Is the <see cref="MemoryPoolState"/> mapped on the DSP?
/// </summary>
/// <returns>Returns true if the <see cref="MemoryPoolState"/> is mapped on the DSP.</returns>
public readonly bool IsMapped()
{
return DspAddress != 0;
}
}
}
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