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mame: start savestates

This commit is contained in:
feos 2020-02-25 00:41:22 +03:00
parent 9274545eb5
commit 7b7f92ea3e
1 changed files with 66 additions and 2 deletions
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68
BizHawk.Emulation.Cores/Arcades/MAME/MAME.cs
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@ -8,6 +8,7 @@ using System.Dynamic;
using BizHawk.Common;
using BizHawk.Emulation.Common;
using System.IO;
namespace BizHawk.Emulation.Cores.Arcades.MAME
{
@ -16,10 +17,10 @@ namespace BizHawk.Emulation.Cores.Arcades.MAME
author: "MAMEDev",
isPorted: true,
isReleased: false,
portedVersion: "0.217",
portedVersion: "0.218",
portedUrl: "https://github.com/mamedev/mame.git",
singleInstance: false)]
public partial class MAME : IEmulator, IVideoProvider, ISoundProvider, ISettable<object, MAME.SyncSettings>
public partial class MAME : IEmulator, IVideoProvider, ISoundProvider, ISettable<object, MAME.SyncSettings>, IStatable
{
public MAME(CoreComm comm, string dir, string file, object syncSettings, out string gamename)
{
@ -116,6 +117,8 @@ namespace BizHawk.Emulation.Cores.Arcades.MAME
private SortedDictionary<string, string> _fieldsPorts = new SortedDictionary<string, string>();
private IController _controller = NullController.Instance;
private IMemoryDomains _memoryDomains;
private byte[] _mameSaveBuffer;
private byte[] _hawkSaveBuffer;
private int _systemBusAddressShift = 0;
private bool _memAccess = false;
private int[] _frameBuffer = new int[0];
@ -173,6 +176,63 @@ namespace BizHawk.Emulation.Cores.Arcades.MAME
#endregion
#region IStatable
public void SaveStateBinary(BinaryWriter writer)
{
IntPtr ptr = LibMAME.mame_lua_get_string("return manager:machine():buffer_save()", out var lengthInBytes);
if (ptr == IntPtr.Zero)
{
Console.WriteLine("LibMAME ERROR: audio buffer pointer is null");
return;
}
Marshal.Copy(ptr, _mameSaveBuffer, 0, lengthInBytes);
if (!LibMAME.mame_lua_free_string(ptr))
{
Console.WriteLine("LibMAME ERROR: audio buffer wasn't freed");
}
writer.Write(_mameSaveBuffer.Length);
writer.Write(_mameSaveBuffer);
writer.Write(Frame);
}
public void LoadStateBinary(BinaryReader reader)
{
int length = reader.ReadInt32();
if (length != _mameSaveBuffer.Length)
{
throw new InvalidOperationException("Savestate buffer size mismatch!");
}
reader.Read(_mameSaveBuffer, 0, _mameSaveBuffer.Length);
Frame = reader.ReadInt32();
LibMAME.mame_lua_execute($"manager:machine():buffer_load({ _mameSaveBuffer })");
}
public byte[] SaveStateBinary()
{
MemoryStream ms = new MemoryStream(_hawkSaveBuffer);
BinaryWriter bw = new BinaryWriter(ms);
SaveStateBinary(bw);
bw.Flush();
if (ms.Position != _hawkSaveBuffer.Length)
{
throw new InvalidOperationException();
}
ms.Close();
return _hawkSaveBuffer;
}
#endregion
#region ISettable
public object GetSettings() => null;
@ -628,6 +688,10 @@ namespace BizHawk.Emulation.Cores.Arcades.MAME
UpdateGameName();
InitMemoryDomains();
IntPtr ptr = LibMAME.mame_lua_get_string("return manager:machine():buffer_save()", out var lengthInBytes);
_mameSaveBuffer = new byte[lengthInBytes];
_hawkSaveBuffer = new byte[lengthInBytes + 4 + 4];
_mameStartupComplete.Set();
}