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[Win] Faster WinMM GetCapabilities() and GetState()

Browse source 
joyGetDevCaps() is an extremely slow call that allocates memory.
WinMMJoystick is now caching its results for a significant speedup in
Joystick.GetCapabilities() and GetState().

The cache is updated whenever a joystick device is removed. WIP to
handle device added notifications.
This commit is contained in:
thefiddler 2014-01-30 10:18:11 +01:00
parent eeaa3276f1
commit 71d6da80de
1 changed files with 209 additions and 106 deletions
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315
Source/OpenTK/Platform/Windows/WinMMJoystick.cs
View file

@ -27,12 +27,12 @@
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using OpenTK.Input;
using System.Security;
using Microsoft.Win32;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using Microsoft.Win32;
using OpenTK.Input;
namespace OpenTK.Platform.Windows
{
@ -43,6 +43,9 @@ namespace OpenTK.Platform.Windows
List<JoystickDevice> sticks = new List<JoystickDevice>();
IList<JoystickDevice> sticks_readonly;
readonly Dictionary<int, int> index_to_stick =
new Dictionary<int, int>();
// Todo: Read the joystick name from the registry.
//static readonly string RegistryJoyConfig = @"Joystick%dConfiguration";
//static readonly string RegistryJoyName = @"Joystick%dOEMName";
@ -62,11 +65,7 @@ namespace OpenTK.Platform.Windows
int number = 0;
while (number < UnsafeNativeMethods.joyGetNumDevs())
{
JoystickDevice<WinMMJoyDetails> stick = OpenJoystick(number++);
if (stick != null)
{
sticks.Add(stick);
}
OpenJoystick(number++);
}
}
@ -80,56 +79,67 @@ namespace OpenTK.Platform.Windows
JoyCaps caps;
JoystickError result = UnsafeNativeMethods.joyGetDevCaps(number, out caps, JoyCaps.SizeInBytes);
if (result != JoystickError.NoError)
return null;
int num_axes = caps.NumAxes;
if ((caps.Capabilities & JoystCapsFlags.HasPov) != 0)
num_axes += 2;
stick = new JoystickDevice<WinMMJoyDetails>(number, num_axes, caps.NumButtons);
stick.Details = new WinMMJoyDetails(num_axes);
// Make sure to reverse the vertical axes, so that +1 points up and -1 points down.
int axis = 0;
if (axis < caps.NumAxes)
{ stick.Details.Min[axis] = caps.XMin; stick.Details.Max[axis] = caps.XMax; axis++; }
if (axis < caps.NumAxes)
{ stick.Details.Min[axis] = caps.YMax; stick.Details.Max[axis] = caps.YMin; axis++; }
if (axis < caps.NumAxes)
{ stick.Details.Min[axis] = caps.ZMax; stick.Details.Max[axis] = caps.ZMin; axis++; }
if (axis < caps.NumAxes)
{ stick.Details.Min[axis] = caps.RMin; stick.Details.Max[axis] = caps.RMax; axis++; }
if (axis < caps.NumAxes)
{ stick.Details.Min[axis] = caps.UMin; stick.Details.Max[axis] = caps.UMax; axis++; }
if (axis < caps.NumAxes)
{ stick.Details.Min[axis] = caps.VMax; stick.Details.Max[axis] = caps.VMin; axis++; }
if ((caps.Capabilities & JoystCapsFlags.HasPov) != 0)
if (result == JoystickError.NoError)
{
stick.Details.PovType = PovType.Exists;
if ((caps.Capabilities & JoystCapsFlags.HasPov4Dir) != 0)
stick.Details.PovType |= PovType.Discrete;
if ((caps.Capabilities & JoystCapsFlags.HasPovContinuous) != 0)
stick.Details.PovType |= PovType.Continuous;
if (caps.NumAxes > JoystickState.MaxAxes)
{
Debug.Print("[Input] Device has {0} axes, which is higher than OpenTK maximum {1}. Please report a bug at http://www.opentk.com",
caps.NumAxes, JoystickState.MaxAxes);
caps.NumAxes = JoystickState.MaxAxes;
}
if (caps.NumAxes > JoystickState.MaxButtons)
{
Debug.Print("[Input] Device has {0} buttons, which is higher than OpenTK maximum {1}. Please report a bug at http://www.opentk.com",
caps.NumButtons, JoystickState.MaxButtons);
caps.NumButtons = JoystickState.MaxButtons;
}
JoystickCapabilities joycaps = new JoystickCapabilities(
caps.NumAxes, caps.NumButtons, true);
int num_axes = caps.NumAxes;
if ((caps.Capabilities & JoystCapsFlags.HasPov) != 0)
num_axes += 2;
stick = new JoystickDevice<WinMMJoyDetails>(number, num_axes, caps.NumButtons);
stick.Details = new WinMMJoyDetails(joycaps);
// Make sure to reverse the vertical axes, so that +1 points up and -1 points down.
for (int axis = 0; axis < caps.NumAxes; axis++)
{
stick.Details.Min[axis] = caps.GetMin(axis);
stick.Details.Max[axis] = caps.GetMax(axis);
}
if ((caps.Capabilities & JoystCapsFlags.HasPov) != 0)
{
stick.Details.PovType = PovType.Exists;
if ((caps.Capabilities & JoystCapsFlags.HasPov4Dir) != 0)
stick.Details.PovType |= PovType.Discrete;
if ((caps.Capabilities & JoystCapsFlags.HasPovContinuous) != 0)
stick.Details.PovType |= PovType.Continuous;
}
// Todo: Implement joystick name detection for WinMM.
stick.Description = String.Format("Joystick/Joystick #{0} ({1} axes, {2} buttons)", number, stick.Axis.Count, stick.Button.Count);
// Todo: Try to get the device name from the registry. Oh joy!
//string key_path = String.Format("{0}\\{1}\\{2}", RegistryJoyConfig, caps.RegKey, RegstryJoyCurrent);
//RegistryKey key = Registry.LocalMachine.OpenSubKey(key_path, false);
//if (key == null)
// key = Registry.CurrentUser.OpenSubKey(key_path, false);
//if (key == null)
// stick.Description = String.Format("USB Joystick {0} ({1} axes, {2} buttons)", number, stick.Axis.Count, stick.Button.Count);
//else
//{
// key.Close();
//}
Debug.Print("Found joystick on device number {0}", number);
index_to_stick.Add(index_to_stick.Count, sticks.Count);
sticks.Add(stick);
}
#warning "Implement joystick name detection for WinMM."
stick.Description = String.Format("Joystick/Joystick #{0} ({1} axes, {2} buttons)", number, stick.Axis.Count, stick.Button.Count);
// Todo: Try to get the device name from the registry. Oh joy!
//string key_path = String.Format("{0}\\{1}\\{2}", RegistryJoyConfig, caps.RegKey, RegstryJoyCurrent);
//RegistryKey key = Registry.LocalMachine.OpenSubKey(key_path, false);
//if (key == null)
// key = Registry.CurrentUser.OpenSubKey(key_path, false);
//if (key == null)
// stick.Description = String.Format("USB Joystick {0} ({1} axes, {2} buttons)", number, stick.Axis.Count, stick.Button.Count);
//else
//{
// key.Close();
//}
if (stick != null)
Debug.Print("Found joystick on device number {0}", number);
return stick;
}
@ -141,11 +151,26 @@ namespace OpenTK.Platform.Windows
// impossible to reconnect a disconnected user.
UnsafeNativeMethods.joyConfigChanged(0);
Debug.Print("[Win] WinMM joystick {0} unplugged", index);
JoystickDevice<WinMMJoyDetails> stick =
sticks[index] as JoystickDevice<WinMMJoyDetails>;
if (stick != null)
{
index_to_stick.Remove(index);
}
}
bool IsValid(int index)
{
return index >= 0 && index < UnsafeNativeMethods.joyGetNumDevs();
if (index_to_stick.ContainsKey(index))
{
return true;
}
else if (index >= 0 && index < UnsafeNativeMethods.joyGetNumDevs())
{
return OpenJoystick(index) != null;
}
return false;
}
static short CalculateOffset(int pos, int min, int max)
@ -260,75 +285,86 @@ namespace OpenTK.Platform.Windows
#region IJoystickDriver2 Members
public JoystickCapabilities GetCapabilities(int index)
public JoystickCapabilities GetCapabilities(int player_index)
{
if (IsValid(index))
if (IsValid(player_index))
{
JoyCaps mmcaps;
JoystickError result = UnsafeNativeMethods.joyGetDevCaps(index, out mmcaps, JoyCaps.SizeInBytes);
if (result == JoystickError.NoError)
{
JoystickCapabilities caps = new JoystickCapabilities(
mmcaps.NumAxes, mmcaps.NumButtons, true);
//if ((caps.Capabilities & JoystCapsFlags.HasPov) != 0)
// gpcaps.DPadCount++;
return caps;
}
else if (result == JoystickError.Unplugged)
{
UnplugJoystick(index);
}
}
else
{
Debug.Print("[Win] Invalid WinMM joystick device {0}", index);
JoystickDevice<WinMMJoyDetails> stick =
sticks[index_to_stick[player_index]] as JoystickDevice<WinMMJoyDetails>;
return stick.Details.Capabilities;
}
return new JoystickCapabilities();
}
public JoystickState GetState(int index)
public JoystickState GetState(int player_index)
{
JoystickState state = new JoystickState();
if (IsValid(index))
if (IsValid(player_index))
{
JoyInfoEx info = new JoyInfoEx();
info.Size = JoyInfoEx.SizeInBytes;
info.Flags = JoystickFlags.All;
int index = index_to_stick[player_index];
JoystickDevice<WinMMJoyDetails> stick =
sticks[index] as JoystickDevice<WinMMJoyDetails>;
JoystickError result = UnsafeNativeMethods.joyGetPosEx(index, ref info);
if (result == JoystickError.NoError)
// For joysticks with fewer than three axes or four buttons, we must
// use joyGetPos; otherwise, joyGetPosEx. This is not just a cosmetic
// difference, simple devices will return incorrect results if we use
// joyGetPosEx on them.
if (stick.Details.Capabilities.AxisCount <= 3 || stick.Details.Capabilities.ButtonCount <= 4)
{
JoyCaps caps;
result = UnsafeNativeMethods.joyGetDevCaps(index, out caps, JoyCaps.SizeInBytes);
// Use joyGetPos
JoyInfo info = new JoyInfo();
JoystickError result = UnsafeNativeMethods.joyGetPos(index, ref info);
if (result == JoystickError.NoError)
{
state.SetAxis(JoystickAxis.Axis0, CalculateOffset(info.XPos, caps.XMin, caps.XMax));
state.SetAxis(JoystickAxis.Axis1, CalculateOffset(info.YPos, caps.YMin, caps.YMax));
state.SetAxis(JoystickAxis.Axis2, CalculateOffset(info.ZPos, caps.ZMin, caps.ZMax));
state.SetAxis(JoystickAxis.Axis3, CalculateOffset(info.RPos, caps.RMin, caps.RMax));
state.SetAxis(JoystickAxis.Axis4, CalculateOffset(info.UPos, caps.UMin, caps.UMax));
state.SetAxis(JoystickAxis.Axis5, CalculateOffset(info.VPos, caps.VMin, caps.VMax));
for (int i = 0; i < stick.Details.Capabilities.AxisCount; i++)
{
state.SetAxis(JoystickAxis.Axis0 + i, CalculateOffset(info.GetAxis(i), stick.Details.Min[i], stick.Details.Max[i]));
}
for (int i = 0; i < 16; i++)
for (int i = 0; i < stick.Details.Capabilities.ButtonCount; i++)
{
state.SetButton(JoystickButton.Button0 + i, (info.Buttons & 1 << i) != 0);
}
state.SetIsConnected(true);
}
else if (result == JoystickError.Unplugged)
{
UnplugJoystick(index);
}
}
if (result == JoystickError.Unplugged)
else
{
UnplugJoystick(index);
// Use joyGetPosEx
JoyInfoEx info = new JoyInfoEx();
info.Size = JoyInfoEx.SizeInBytes;
info.Flags = JoystickFlags.All;
JoystickError result = UnsafeNativeMethods.joyGetPosEx(index, ref info);
if (result == JoystickError.NoError)
{
for (int i = 0; i < stick.Details.Capabilities.AxisCount; i++)
{
state.SetAxis(JoystickAxis.Axis0 + i, CalculateOffset(info.GetAxis(i), stick.Details.Min[i], stick.Details.Max[i]));
}
for (int i = 0; i < stick.Details.Capabilities.ButtonCount; i++)
{
state.SetButton(JoystickButton.Button0 + i, (info.Buttons & 1 << i) != 0);
}
state.SetIsConnected(true);
}
else if (result == JoystickError.Unplugged)
{
UnplugJoystick(index);
}
}
}
else
{
Debug.Print("[Win] Invalid WinMM joystick device {0}", index);
}
return state;
}
@ -420,6 +456,7 @@ namespace OpenTK.Platform.Windows
Backward = 18000,
Left = 27000
}
struct JoyCaps
{
public ushort Mid;
@ -456,6 +493,53 @@ namespace OpenTK.Platform.Windows
{
SizeInBytes = Marshal.SizeOf(default(JoyCaps));
}
public int GetMin(int i)
{
switch (i)
{
case 0: return XMin;
case 1: return YMin;
case 2: return ZMin;
case 3: return RMin;
case 4: return UMin;
case 5: return VMin;
default: return 0;
}
}
public int GetMax(int i)
{
switch (i)
{
case 0: return XMax;
case 1: return YMax;
case 2: return ZMax;
case 3: return RMax;
case 4: return UMax;
case 5: return VMax;
default: return 0;
}
}
}
struct JoyInfo
{
public int XPos;
public int YPos;
public int ZPos;
public uint Buttons;
public int GetAxis(int i)
{
switch (i)
{
case 0: return XPos;
case 1: return YPos;
case 2: return ZPos;
default: return 0;
}
}
}
struct JoyInfoEx
@ -472,8 +556,10 @@ namespace OpenTK.Platform.Windows
public uint Buttons;
public uint ButtonNumber;
public int Pov;
#pragma warning disable 0169
uint Reserved1;
uint Reserved2;
#pragma warning restore 0169
public static readonly int SizeInBytes;
@ -481,6 +567,20 @@ namespace OpenTK.Platform.Windows
{
SizeInBytes = Marshal.SizeOf(default(JoyInfoEx));
}
public int GetAxis(int i)
{
switch (i)
{
case 0: return XPos;
case 1: return YPos;
case 2: return ZPos;
case 3: return RPos;
case 4: return UPos;
case 5: return VPos;
default: return 0;
}
}
}
static class UnsafeNativeMethods
@ -488,6 +588,8 @@ namespace OpenTK.Platform.Windows
[DllImport("Winmm.dll"), SuppressUnmanagedCodeSecurity]
public static extern JoystickError joyGetDevCaps(int uJoyID, out JoyCaps pjc, int cbjc);
[DllImport("Winmm.dll"), SuppressUnmanagedCodeSecurity]
public static extern JoystickError joyGetPos(int uJoyID, ref JoyInfo pji);
[DllImport("Winmm.dll"), SuppressUnmanagedCodeSecurity]
public static extern JoystickError joyGetPosEx(int uJoyID, ref JoyInfoEx pji);
[DllImport("Winmm.dll"), SuppressUnmanagedCodeSecurity]
public static extern int joyGetNumDevs();
@ -514,14 +616,15 @@ namespace OpenTK.Platform.Windows
struct WinMMJoyDetails
{
public readonly float[] Min, Max; // Minimum and maximum offset of each axis.
public readonly int[] Min, Max; // Minimum and maximum offset of each axis.
public PovType PovType;
public JoystickCapabilities Capabilities;
public WinMMJoyDetails(int num_axes)
public WinMMJoyDetails(JoystickCapabilities caps)
: this()
{
Min = new float[num_axes];
Max = new float[num_axes];
PovType = PovType.None;
Min = new int[caps.AxisCount];
Max = new int[caps.AxisCount];
}
public float CalculateOffset(float pos, int axis)