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