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Rewind - don't allocate a buffer until necessary, and only do so if rewind is enabled for that core

This commit is contained in:
adelikat 2013-08-24 15:01:50 +00:00
parent 96405ad7de
commit 1400c84fdd
1 changed files with 29 additions and 17 deletions
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46
BizHawk.MultiClient/Rewind.cs
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@ -8,7 +8,7 @@ namespace BizHawk.MultiClient
{
public partial class MainForm
{
private StreamBlobDatabase RewindBuf = new StreamBlobDatabase(Global.Config.Rewind_OnDisk, Global.Config.Rewind_BufferSize * (long)1024 * (long)1024);
private StreamBlobDatabase RewindBuf;// = new StreamBlobDatabase(Global.Config.Rewind_OnDisk, Global.Config.Rewind_BufferSize * (long)1024 * (long)1024);
private RewindThreader RewindThread;
private byte[] LastState;
@ -18,7 +18,7 @@ namespace BizHawk.MultiClient
public float Rewind_FullnessRatio { get { return RewindBuf.FullnessRatio; } }
public int Rewind_Count { get { return RewindBuf.Count; } }
public long Rewind_Size { get { return RewindBuf.Size; } }
public long Rewind_Size { get { return RewindBuf.Size; } }
/// <summary>
/// Manages a ring buffer of storage which can continually chow its own tail to keep growing forward.
/// Probably only useful for the rewind buffer, so I didnt put it in another file
@ -391,15 +391,15 @@ namespace BizHawk.MultiClient
void SetRewindParams(bool enabled, int frequency)
{
if (RewindActive != enabled)
{
Global.OSD.AddMessage("Rewind " + (enabled ? "Enabled" : "Disabled"));
}
if (RewindActive != enabled)
{
Global.OSD.AddMessage("Rewind " + (enabled ? "Enabled" : "Disabled"));
}
if (RewindFrequency != frequency && enabled)
{
Global.OSD.AddMessage("Rewind frequency set to " + frequency);
}
if (RewindFrequency != frequency && enabled)
{
Global.OSD.AddMessage("Rewind frequency set to " + frequency);
}
RewindActive = enabled;
RewindFrequency = frequency;
@ -410,29 +410,41 @@ namespace BizHawk.MultiClient
public void DoRewindSettings()
{
long cap = Global.Config.Rewind_BufferSize * (long)1024 * (long)1024;
RewindBuf = new StreamBlobDatabase(Global.Config.Rewind_OnDisk, cap);
if (RewindThread != null)
RewindThread.Dispose();
RewindThread = new RewindThreader(this, Global.Config.Rewind_IsThreaded);
// This is the first frame. Capture the state, and put it in LastState for future deltas to be compared against.
LastState = Global.Emulator.SaveStateBinary();
int state_size = 0;
if (LastState.Length >= Global.Config.Rewind_LargeStateSize)
{
SetRewindParams(Global.Config.RewindEnabledLarge, Global.Config.RewindFrequencyLarge);
state_size = 3;
}
else if (LastState.Length >= Global.Config.Rewind_MediumStateSize)
{
SetRewindParams(Global.Config.RewindEnabledMedium, Global.Config.RewindFrequencyMedium);
state_size = 2;
}
else
{
SetRewindParams(Global.Config.RewindEnabledSmall, Global.Config.RewindFrequencySmall);
state_size = 1;
}
bool rewind_enabled = false;
if (state_size == 1) rewind_enabled = Global.Config.RewindEnabledSmall;
if (state_size == 2) rewind_enabled = Global.Config.RewindEnabledMedium;
if (state_size == 3) rewind_enabled = Global.Config.RewindEnabledLarge;
RewindDeltaEnable = Global.Config.Rewind_UseDelta;
if (rewind_enabled)
{
long cap = Global.Config.Rewind_BufferSize * (long)1024 * (long)1024;
RewindBuf = new StreamBlobDatabase(Global.Config.Rewind_OnDisk, cap);
if (RewindThread != null)
RewindThread.Dispose();
RewindThread = new RewindThreader(this, Global.Config.Rewind_IsThreaded);
}
}
void CaptureRewindStateNonDelta(byte[] CurrentState)
@ -581,7 +593,7 @@ namespace BizHawk.MultiClient
public void ResetRewindBuffer()
{
RewindBuf.Clear();
if (RewindBuf != null) { RewindBuf.Clear(); }
RewindImpossible = false;
LastState = null;
}