Immature, but initial iCade support for one player.

Classes/ControlPadEventDelegate.h

@@ -0,0 +1,39 @@
+//
+//  ControlPadEventDelegate.h
+//  SNES4iOS
+//
+//  Created by Shawn Allen on 9/28/12.
+//
+//
+
+#import <Foundation/Foundation.h>
+
+typedef enum ControlPadState {
+    ControlPadStateNone = 0x000,
+    ControlPadStateUp = 0x001,
+    ControlPadStateRight = 0x002,
+    ControlPadStateDown = 0x004,
+    ControlPadStateLeft = 0x008,
+
+    ControlPadStateUpRight = ControlPadStateUp | ControlPadStateRight,
+    ControlPadStateDownRight = ControlPadStateDown | ControlPadStateRight,
+    ControlPadStateUpLeft = ControlPadStateUp | ControlPadStateLeft,
+    ControlPadStateDownLeft = ControlPadStateDown | ControlPadStateLeft,
+
+    ControlPadStateButtonA = 0x010,
+    ControlPadStateButtonB = 0x020,
+    ControlPadStateButtonC = 0x040,
+    ControlPadStateButtonD = 0x080,
+    ControlPadStateButtonE = 0x100,
+    ControlPadStateButtonF = 0x200,
+    ControlPadStateButtonG = 0x400,
+    ControlPadStateButtonH = 0x800,
+
+} ControlPadState;
+
+@protocol ControlPadEventDelegate <NSObject>
+
+@required
+- (void)padChangedState:(ControlPadState)changedState pressed:(BOOL)pressed;
+
+@end

Classes/ControlPadManager.h

@@ -8,12 +8,13 @@
 
 #import <Foundation/Foundation.h>
 #import <GameKit/GameKit.h>
+#import "ControlPadEventDelegate.h"
 
 #define MAX_CONTROL_PADS 4
 
 extern unsigned long padStatusForPadNumber(int which);
 
-@interface ControlPadManager : NSObject <GKSessionDelegate> {
+@interface ControlPadManager : NSObject <GKSessionDelegate, ControlPadEventDelegate> {
 	GKSession *gkSession;
 
 	NSMutableArray *controlPadPeerIDs;

Classes/ControlPadManager.m

@@ -131,6 +131,88 @@ - (void) denyPendingConnection
 	self.pendingConnectionPeerID = nil;
 }
 
+#pragma mark -
+#pragma mark ControlPadEventDelegate
+
+enum  { GP2X_UP=0x1,       GP2X_LEFT=0x4,       GP2X_DOWN=0x10,  GP2X_RIGHT=0x40,
+	GP2X_START=1<<8,   GP2X_SELECT=1<<9,    GP2X_L=1<<10,    GP2X_R=1<<11,
+	GP2X_A=1<<12,      GP2X_B=1<<13,        GP2X_X=1<<14,    GP2X_Y=1<<15,
+	GP2X_VOL_UP=1<<23, GP2X_VOL_DOWN=1<<22, GP2X_PUSH=1<<27 };
+
+- (void)padChangedState:(ControlPadState)changedState pressed:(BOOL)pressed;
+{
+    static unsigned long padState = 0;
+
+    unsigned long stateInGP2XValue = 0;
+
+    /*
+     A        SELECT
+     B        LEFT SHOULDER
+     C        START
+     D        RIGHT SHOULDER
+     E        Y
+     F        A
+     G        B
+     H        X
+     */
+
+    switch (changedState) {
+        case ControlPadStateNone:
+            stateInGP2XValue = 0;
+            break;
+        case ControlPadStateUp:
+            stateInGP2XValue = GP2X_UP;
+            break;
+        case ControlPadStateDown:
+            stateInGP2XValue = GP2X_DOWN;
+            break;
+        case ControlPadStateLeft:
+            stateInGP2XValue = GP2X_LEFT;
+            break;
+        case ControlPadStateRight:
+            stateInGP2XValue = GP2X_RIGHT;
+            break;
+        case ControlPadStateButtonA:
+            stateInGP2XValue = GP2X_SELECT;
+            break;
+        case ControlPadStateButtonB:
+            stateInGP2XValue = GP2X_L;
+            break;
+        case ControlPadStateButtonC:
+            stateInGP2XValue = GP2X_START;
+            break;
+        case ControlPadStateButtonD:
+            stateInGP2XValue = GP2X_R;
+            break;
+        case ControlPadStateButtonE:
+            stateInGP2XValue = GP2X_Y;
+            break;
+        case ControlPadStateButtonF:
+            stateInGP2XValue = GP2X_A;
+            break;
+        case ControlPadStateButtonG:
+            stateInGP2XValue = GP2X_B;
+            break;
+        case ControlPadStateButtonH:
+            stateInGP2XValue = GP2X_X;
+            break;
+        case ControlPadStateDownLeft:
+        case ControlPadStateDownRight:
+        case ControlPadStateUpLeft:
+        case ControlPadStateUpRight:
+        default:
+            NSLog(@"%s Compound pad movement sent, but was unhandled.", __PRETTY_FUNCTION__);
+            break;
+    }
+
+    if (pressed)
+        padState |= stateInGP2XValue;
+    else
+        padState ^= stateInGP2XValue;
+
+    [self convertData:[NSData dataWithBytes:&padState length:sizeof(padState)] padNumber:0];
+}
+
 #pragma mark -
 #pragma mark GKSession Delegate methods
 - (void)session:(GKSession *)session peer:(NSString *)peerID didChangeState:(GKPeerConnectionState)state {

Classes/SNES4iOSAppDelegate.h

@@ -10,6 +10,7 @@
 #import "SNESControllerAppDelegate.h"
 #import "SNESControllerViewController.h"
 
+@class iCadeViewController;
 @class EmulationViewController;
 @class RomSelectionViewController;
 @class RomDetailViewController;
@@ -46,6 +47,7 @@
 @property (nonatomic, strong) ControlPadManager *controlPadManager;
 
 @property (nonatomic, strong) EmulationViewController *emulationViewController;
+@property (nonatomic, strong) iCadeViewController *iCadeViewController;
 @property (nonatomic, strong) WebBrowserViewController *webViewController;
 @property (nonatomic, strong) UINavigationController *webNavController;
 @property (strong, nonatomic) UITabBarController *tabBarController;

Classes/SNES4iOSAppDelegate.m

@@ -26,7 +26,7 @@ @implementation SNES4iOSAppDelegate
 @synthesize window, splitViewController, romSelectionViewController, romDetailViewController, settingsViewController;
 @synthesize controlPadConnectViewController, controlPadManager;
 @synthesize romDirectoryPath, saveDirectoryPath, snapshotDirectoryPath;
-@synthesize emulationViewController, webViewController, webNavController;
+@synthesize emulationViewController, iCadeViewController, webViewController, webNavController;
 @synthesize tabBarController;
 @synthesize snesControllerAppDelegate, snesControllerViewController;
 @synthesize sramDirectoryPath;
@@ -69,6 +69,11 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
 	// Make the main emulator view controller
 	emulationViewController = [[EmulationViewController alloc] init];
 	emulationViewController.view.hidden = YES;
+
+    // Construct and attach the iCade view controller into the emulation view controller's view hierarchy
+    [self setICadeViewController:[[iCadeViewController alloc] init]];
+    [[[self emulationViewController] view] addSubview:[[self iCadeViewController] view]];
+    [[self iCadeViewController] setDelegate:[self controlPadManager]];
 
 	// Make the web browser view controller
 	webViewController = [[WebBrowserViewController alloc] initWithNibName:@"WebBrowserViewController" bundle:nil];

Classes/iCadeViewController.h

@@ -0,0 +1,17 @@
+//
+//  iCadeViewController.h
+//  SNES4iOS
+//
+//  Created by Shawn Allen on 9/28/12.
+//
+//
+
+#import <UIKit/UIKit.h>
+#import "iCadeReaderView.h"
+#import "ControlPadEventDelegate.h"
+
+@interface iCadeViewController : UIViewController<iCadeEventDelegate>
+
+@property (nonatomic, weak) IBOutlet id<ControlPadEventDelegate> delegate;
+
+@end

Classes/iCadeViewController.m

@@ -0,0 +1,95 @@
+//
+//  iCadeViewController.m
+//  SNES4iOS
+//
+//  Created by Shawn Allen on 9/28/12.
+//
+//
+
+#import "iCadeViewController.h"
+
+@interface iCadeViewController ()
+
+- (void)setState:(BOOL)state forButton:(iCadeState)button;
+
+@end
+
+@implementation iCadeViewController
+
+#pragma mark -
+#pragma mark Class extension
+
+- (void)setState:(BOOL)state forButton:(iCadeState)button;
+{
+    ControlPadState padButton = ControlPadStateNone;
+
+    switch (button) {
+        case iCadeButtonA:
+            padButton = ControlPadStateButtonA;
+            break;
+        case iCadeButtonB:
+            padButton = ControlPadStateButtonB;
+            break;
+        case iCadeButtonC:
+            padButton = ControlPadStateButtonC;
+            break;
+        case iCadeButtonD:
+            padButton = ControlPadStateButtonD;
+            break;
+        case iCadeButtonE:
+            padButton = ControlPadStateButtonE;
+            break;
+        case iCadeButtonF:
+            padButton = ControlPadStateButtonF;
+            break;
+        case iCadeButtonG:
+            padButton = ControlPadStateButtonG;
+            break;
+        case iCadeButtonH:
+            padButton = ControlPadStateButtonH;
+            break;
+        case iCadeJoystickUp:
+            padButton = ControlPadStateUp;
+            break;
+        case iCadeJoystickRight:
+            padButton = ControlPadStateRight;
+            break;
+        case iCadeJoystickDown:
+            padButton = ControlPadStateDown;
+            break;
+        case iCadeJoystickLeft:
+            padButton = ControlPadStateLeft;
+            break;
+        default:
+            break;
+    }
+
+    [[self delegate] padChangedState:padButton pressed:state];
+}
+
+#pragma mark -
+#pragma mark UIViewController
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    iCadeReaderView *control = [[iCadeReaderView alloc] initWithFrame:CGRectZero];
+    [[self view] addSubview:control];
+    [control setActive:YES];
+    [control setDelegate:self];
+}
+
+#pragma mark -
+#pragma mark iCadeEventDelegate
+
+- (void)buttonDown:(iCadeState)button;
+{
+    [self setState:YES forButton:button];
+}
+
+- (void)buttonUp:(iCadeState)button;
+{
+    [self setState:NO forButton:button];
+}
+
+@end

SNES4iOS.xcodeproj/project.pbxproj

@@ -14,6 +14,8 @@
 		2804200B108E984D000629CD /* RomSelectionViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 28042008108E984D000629CD /* RomSelectionViewController.m */; settings = {COMPILER_FLAGS = "-fno-objc-arc"; }; };
 		2804200C108E984D000629CD /* RomDetailViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 2804200A108E984D000629CD /* RomDetailViewController.m */; settings = {COMPILER_FLAGS = "-fno-objc-arc"; }; };
 		2892E4100DC94CBA00A64D0F /* CoreGraphics.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 2892E40F0DC94CBA00A64D0F /* CoreGraphics.framework */; };
+		520D7C3E1618A9C4009306B7 /* iCadeReaderView.m in Sources */ = {isa = PBXBuildFile; fileRef = 520D7C3C1618A9C4009306B7 /* iCadeReaderView.m */; };
+		520D7C441618AA10009306B7 /* iCadeViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 520D7C431618AA10009306B7 /* iCadeViewController.m */; };
 		6C3CE6EB135BCD0400D61F53 /* IOSurface.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6C3CE6EA135BCD0400D61F53 /* IOSurface.framework */; };
 		6CD00F45135FED04003E789A /* libpocketsnes.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 6CD00F44135FED04003E789A /* libpocketsnes.a */; };
 		6CD00F60135FEE9C003E789A /* AudioToolbox.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6CD00F5F135FEE9C003E789A /* AudioToolbox.framework */; };
@@ -99,6 +101,12 @@
 		2892E40F0DC94CBA00A64D0F /* CoreGraphics.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreGraphics.framework; path = System/Library/Frameworks/CoreGraphics.framework; sourceTree = SDKROOT; };
 		28A0AAE50D9B0CCF005BE974 /* SNES4iOS_Prefix.pch */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SNES4iOS_Prefix.pch; sourceTree = "<group>"; };
 		29B97316FDCFA39411CA2CEA /* main.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
+		520D7C3B1618A9C4009306B7 /* iCadeReaderView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = iCadeReaderView.h; sourceTree = "<group>"; };
+		520D7C3C1618A9C4009306B7 /* iCadeReaderView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = iCadeReaderView.m; sourceTree = "<group>"; };
+		520D7C3D1618A9C4009306B7 /* iCadeState.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = iCadeState.h; sourceTree = "<group>"; };
+		520D7C411618AA10009306B7 /* ControlPadEventDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ControlPadEventDelegate.h; sourceTree = "<group>"; };
+		520D7C421618AA10009306B7 /* iCadeViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = iCadeViewController.h; sourceTree = "<group>"; };
+		520D7C431618AA10009306B7 /* iCadeViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = iCadeViewController.m; sourceTree = "<group>"; };
 		6C3CE6EA135BCD0400D61F53 /* IOSurface.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = IOSurface.framework; path = System/Library/PrivateFrameworks/IOSurface.framework; sourceTree = SDKROOT; };
 		6CD00F44135FED04003E789A /* libpocketsnes.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; name = libpocketsnes.a; path = src/snes4iphone_src/libpocketsnes.a; sourceTree = "<group>"; };
 		6CD00F5F135FEE9C003E789A /* AudioToolbox.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = AudioToolbox.framework; path = System/Library/Frameworks/AudioToolbox.framework; sourceTree = SDKROOT; };
@@ -222,6 +230,9 @@
 		080E96DDFE201D6D7F000001 /* Classes */ = {
 			isa = PBXGroup;
 			children = (
+				520D7C411618AA10009306B7 /* ControlPadEventDelegate.h */,
+				520D7C421618AA10009306B7 /* iCadeViewController.h */,
+				520D7C431618AA10009306B7 /* iCadeViewController.m */,
 				1D3623240D0F684500981E51 /* SNES4iOSAppDelegate.h */,
 				1D3623250D0F684500981E51 /* SNES4iOSAppDelegate.m */,
 				28042007108E984D000629CD /* RomSelectionViewController.h */,
@@ -264,6 +275,7 @@
 				080E96DDFE201D6D7F000001 /* Classes */,
 				CE43A4CC119DFEF70007E399 /* Resources */,
 				29B97315FDCFA39411CA2CEA /* Other Sources */,
+				520D7C401618A9F1009306B7 /* External Libraries */,
 				29B97323FDCFA39411CA2CEA /* Frameworks */,
 				19C28FACFE9D520D11CA2CBB /* Products */,
 			);
@@ -301,6 +313,24 @@
 			name = Frameworks;
 			sourceTree = "<group>";
 		};
+		520D7C3A1618A9C4009306B7 /* iCade */ = {
+			isa = PBXGroup;
+			children = (
+				520D7C3B1618A9C4009306B7 /* iCadeReaderView.h */,
+				520D7C3C1618A9C4009306B7 /* iCadeReaderView.m */,
+				520D7C3D1618A9C4009306B7 /* iCadeState.h */,
+			);
+			path = iCade;
+			sourceTree = "<group>";
+		};
+		520D7C401618A9F1009306B7 /* External Libraries */ = {
+			isa = PBXGroup;
+			children = (
+				520D7C3A1618A9C4009306B7 /* iCade */,
+			);
+			name = "External Libraries";
+			sourceTree = "<group>";
+		};
 		BF7B7A0C14A64BEE00014E61 /* SNES Controller */ = {
 			isa = PBXGroup;
 			children = (
@@ -544,6 +574,8 @@
 				BF7B7A0914A64BEA00014E61 /* SessionController.m in Sources */,
 				BF7B7A0A14A64BEA00014E61 /* SNESControllerAppDelegate.m in Sources */,
 				BF7B7A0B14A64BEA00014E61 /* SNESControllerViewController.m in Sources */,
+				520D7C3E1618A9C4009306B7 /* iCadeReaderView.m in Sources */,
+				520D7C441618AA10009306B7 /* iCadeViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};