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using Ryujinx.Common.Logging;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
namespace Ryujinx.Common.SystemInterop
{
/// <summary>
/// Handle Windows Multimedia timer resolution.
/// </summary>
[SupportedOSPlatform("windows")]
public partial class WindowsMultimediaTimerResolution : IDisposable
{
[StructLayout(LayoutKind.Sequential)]
public struct TimeCaps
{
public uint wPeriodMin;
public uint wPeriodMax;
}
[LibraryImport("winmm.dll", EntryPoint = "timeGetDevCaps", SetLastError = true)]
private static partial uint TimeGetDevCaps(ref TimeCaps timeCaps, uint sizeTimeCaps);
[LibraryImport("winmm.dll", EntryPoint = "timeBeginPeriod")]
private static partial uint TimeBeginPeriod(uint uMilliseconds);
[LibraryImport("winmm.dll", EntryPoint = "timeEndPeriod")]
private static partial uint TimeEndPeriod(uint uMilliseconds);
private uint _targetResolutionInMilliseconds;
private bool _isActive;
/// <summary>
/// Create a new <see cref="WindowsMultimediaTimerResolution"/> and activate the given resolution.
/// </summary>
/// <param name="targetResolutionInMilliseconds"></param>
public WindowsMultimediaTimerResolution(uint targetResolutionInMilliseconds)
{
_targetResolutionInMilliseconds = targetResolutionInMilliseconds;
EnsureResolutionSupport();
Activate();
}
private void EnsureResolutionSupport()
{
TimeCaps timeCaps = default;
uint result = TimeGetDevCaps(ref timeCaps, (uint)Unsafe.SizeOf<TimeCaps>());
if (result != 0)
{
Logger.Notice.Print(LogClass.Application, $"timeGetDevCaps failed with result: {result}");
}
else
{
uint supportedTargetResolutionInMilliseconds = Math.Min(Math.Max(timeCaps.wPeriodMin, _targetResolutionInMilliseconds), timeCaps.wPeriodMax);
if (supportedTargetResolutionInMilliseconds != _targetResolutionInMilliseconds)
{
Logger.Notice.Print(LogClass.Application, $"Target resolution isn't supported by OS, using closest resolution: {supportedTargetResolutionInMilliseconds}ms");
_targetResolutionInMilliseconds = supportedTargetResolutionInMilliseconds;
}
}
}
private void Activate()
{
uint result = TimeBeginPeriod(_targetResolutionInMilliseconds);
if (result != 0)
{
Logger.Notice.Print(LogClass.Application, $"timeBeginPeriod failed with result: {result}");
}
else
{
_isActive = true;
}
}
private void Disable()
{
if (_isActive)
{
uint result = TimeEndPeriod(_targetResolutionInMilliseconds);
if (result != 0)
{
Logger.Notice.Print(LogClass.Application, $"timeEndPeriod failed with result: {result}");
}
else
{
_isActive = false;
}
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
Disable();
}
}
}
}
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