106 lines
2.6 KiB
C#
106 lines
2.6 KiB
C#
using System;
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using System.Diagnostics;
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using BizHawk.Emulation.Common;
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namespace BizHawk.Emulation.Cores.Nintendo.Gameboy
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{
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public partial class Gameboy : IEmulator, IBoardInfo
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{
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public IEmulatorServiceProvider ServiceProvider { get; }
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public ControllerDefinition ControllerDefinition => GbController;
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public void FrameAdvance(IController controller, bool render, bool rendersound)
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{
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FrameAdvancePrep(controller);
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if (_syncSettings.EqualLengthFrames)
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{
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while (true)
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{
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// target number of samples to emit: length of 1 frame minus whatever overflow
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uint samplesEmitted = TICKSINFRAME - frameOverflow;
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Debug.Assert(samplesEmitted * 2 <= _soundbuff.Length);
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if (LibGambatte.gambatte_runfor(GambatteState, _soundbuff, ref samplesEmitted) > 0)
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{
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LibGambatte.gambatte_blitto(GambatteState, VideoBuffer, 160);
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}
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// account for actual number of samples emitted
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_cycleCount += samplesEmitted;
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frameOverflow += samplesEmitted;
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if (rendersound && !Muted)
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{
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ProcessSound((int)samplesEmitted);
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}
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if (frameOverflow >= TICKSINFRAME)
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{
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frameOverflow -= TICKSINFRAME;
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break;
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}
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}
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}
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else
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{
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// target number of samples to emit: always 59.7fps
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// runfor() always ends after creating a video frame, so sync-up is guaranteed
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// when the display has been off, some frames can be markedly shorter than expected
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uint samplesEmitted = TICKSINFRAME;
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if (LibGambatte.gambatte_runfor(GambatteState, _soundbuff, ref samplesEmitted) > 0)
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{
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LibGambatte.gambatte_blitto(GambatteState, VideoBuffer, 160);
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}
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_cycleCount += samplesEmitted;
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frameOverflow = 0;
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if (rendersound && !Muted)
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{
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ProcessSound((int)samplesEmitted);
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}
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}
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if (rendersound && !Muted)
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{
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ProcessSoundEnd();
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}
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FrameAdvancePost();
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}
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public int Frame { get; private set; }
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public string SystemId => "GB";
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public string BoardName { get; }
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public bool DeterministicEmulation { get; }
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public void ResetCounters()
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{
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Frame = 0;
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LagCount = 0;
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IsLagFrame = false;
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// reset frame counters is meant to "re-zero" emulation time wherever it was
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// so these should be reset as well
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_cycleCount = 0;
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frameOverflow = 0;
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}
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public CoreComm CoreComm { get; }
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public void Dispose()
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{
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if (GambatteState != IntPtr.Zero)
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{
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LibGambatte.gambatte_destroy(GambatteState);
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GambatteState = IntPtr.Zero;
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}
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DisposeSound();
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}
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}
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}
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