Add support for game controllers

Limelight.xcodeproj/project.pbxproj

@@ -11,6 +11,7 @@
 		98A03B4D19F352EB00861ACA /* liblimelight-common.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 98A03B4A19F3514B00861ACA /* liblimelight-common.a */; };
 		98A03B5019F3598400861ACA /* VideoDecoderRenderer.m in Sources */ = {isa = PBXBuildFile; fileRef = 98A03B4F19F3598400861ACA /* VideoDecoderRenderer.m */; };
 		98A03B5119F35AAC00861ACA /* libcrypto.a in Frameworks */ = {isa = PBXBuildFile; fileRef = FBCC0E9819EF9703009729EB /* libcrypto.a */; };
+		98B175B419F5DAFC00DA2AED /* ControllerSupport.m in Sources */ = {isa = PBXBuildFile; fileRef = 98B175B319F5DAFC00DA2AED /* ControllerSupport.m */; };
 		FB290CF219B2C406004C83CF /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FB290CF119B2C406004C83CF /* Foundation.framework */; };
 		FB290CF419B2C406004C83CF /* CoreGraphics.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FB290CF319B2C406004C83CF /* CoreGraphics.framework */; };
 		FB290CF619B2C406004C83CF /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = FB290CF519B2C406004C83CF /* UIKit.framework */; };
@@ -85,6 +86,8 @@
 		98A03B4519F3514B00861ACA /* limelight-common.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = "limelight-common.xcodeproj"; path = "limelight-common-c/limelight-common.xcodeproj"; sourceTree = "<group>"; };
 		98A03B4E19F3598400861ACA /* VideoDecoderRenderer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = VideoDecoderRenderer.h; path = Limelight/VideoDecoderRenderer.h; sourceTree = SOURCE_ROOT; };
 		98A03B4F19F3598400861ACA /* VideoDecoderRenderer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = VideoDecoderRenderer.m; path = Limelight/VideoDecoderRenderer.m; sourceTree = SOURCE_ROOT; };
+		98B175B219F5DAFC00DA2AED /* ControllerSupport.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ControllerSupport.h; sourceTree = "<group>"; };
+		98B175B319F5DAFC00DA2AED /* ControllerSupport.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = ControllerSupport.m; sourceTree = "<group>"; };
 		FB290CEE19B2C406004C83CF /* Limelight.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Limelight.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		FB290CF119B2C406004C83CF /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = System/Library/Frameworks/Foundation.framework; sourceTree = SDKROOT; };
 		FB290CF319B2C406004C83CF /* CoreGraphics.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreGraphics.framework; path = System/Library/Frameworks/CoreGraphics.framework; sourceTree = SDKROOT; };
@@ -337,6 +340,8 @@
 				FB8945EE19F5C3CD00339C8A /* Utils.m */,
 				FB8945F019F5C76C00339C8A /* StreamConfiguration.h */,
 				FB8945F119F5C76C00339C8A /* StreamConfiguration.m */,
+				98B175B219F5DAFC00DA2AED /* ControllerSupport.h */,
+				98B175B319F5DAFC00DA2AED /* ControllerSupport.m */,
 			);
 			path = Limelight;
 			sourceTree = "<group>";
@@ -705,6 +710,7 @@
 				FB290D0419B2C406004C83CF /* AppDelegate.m in Sources */,
 				FBAB29F619EDE0F800929691 /* Computer.m in Sources */,
 				FB290D3A19B2C6E3004C83CF /* StreamFrameViewController.m in Sources */,
+				98B175B419F5DAFC00DA2AED /* ControllerSupport.m in Sources */,
 				FB290D0019B2C406004C83CF /* main.m in Sources */,
 				FB8945F219F5C76C00339C8A /* StreamConfiguration.m in Sources */,
 				FB290D3919B2C6E3004C83CF /* MainFrameViewController.m in Sources */,

Limelight/ControllerSupport.h

@@ -0,0 +1,20 @@
+//
+//  ControllerSupport.h
+//  Limelight
+//
+//  Created by Cameron Gutman on 10/20/14.
+//  Copyright (c) 2014 Limelight Stream. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface ControllerSupport : NSObject
+
+-(id) init;
+
+-(void) cleanup;
+
+@property (nonatomic, strong) id connectObserver;
+@property (nonatomic, strong) id disconnectObserver;
+
+@end

Limelight/ControllerSupport.m

@@ -0,0 +1,121 @@
+//
+//  ControllerSupport.m
+//  Limelight
+//
+//  Created by Cameron Gutman on 10/20/14.
+//  Copyright (c) 2014 Limelight Stream. All rights reserved.
+//
+
+#import "ControllerSupport.h"
+#include "Limelight.h"
+
+@import GameController;
+
+@implementation ControllerSupport
+
+// UPDATE_BUTTON(flag, pressed)
+#define UPDATE_BUTTON(x, y) (buttonFlags = \
+    (y) ? (buttonFlags | (x)) : (buttonFlags & ~(x)))
+
+static NSLock *controllerStreamLock;
+
++(void) registerControllerCallbacks
+{
+    for (int i = 0; i < [[GCController controllers] count]; i++) {
+        GCController *controller = [GCController controllers][i];
+        
+        if (controller != NULL) {
+            NSLog(@"Controller connected!");
+            if (controller.extendedGamepad != NULL) {
+                controller.extendedGamepad.valueChangedHandler = ^(GCExtendedGamepad *gamepad, GCControllerElement *element) {
+                    short buttonFlags;
+                    short leftStickX, leftStickY;
+                    short rightStickX, rightStickY;
+                    char leftTrigger, rightTrigger;
+                    
+                    UPDATE_BUTTON(A_FLAG, gamepad.buttonA.pressed);
+                    UPDATE_BUTTON(B_FLAG, gamepad.buttonB.pressed);
+                    UPDATE_BUTTON(X_FLAG, gamepad.buttonX.pressed);
+                    UPDATE_BUTTON(Y_FLAG, gamepad.buttonY.pressed);
+                    
+                    UPDATE_BUTTON(UP_FLAG, gamepad.dpad.up.pressed);
+                    UPDATE_BUTTON(DOWN_FLAG, gamepad.dpad.down.pressed);
+                    UPDATE_BUTTON(LEFT_FLAG, gamepad.dpad.left.pressed);
+                    UPDATE_BUTTON(RIGHT_FLAG, gamepad.dpad.right.pressed);
+                    
+                    UPDATE_BUTTON(LB_FLAG, gamepad.leftShoulder.pressed);
+                    UPDATE_BUTTON(RB_FLAG, gamepad.rightShoulder.pressed);
+                    
+                    leftStickX = gamepad.leftThumbstick.xAxis.value * 0x7FFE;
+                    leftStickY = gamepad.leftThumbstick.yAxis.value * 0x7FFE;
+                    
+                    rightStickX = gamepad.rightThumbstick.xAxis.value * 0x7FFE;
+                    rightStickY = gamepad.rightThumbstick.yAxis.value * 0x7FFE;
+                    
+                    leftTrigger = gamepad.leftTrigger.value * 0xFF;
+                    rightTrigger = gamepad.rightTrigger.value * 0xFF;
+                    
+                    // We call LiSendControllerEvent while holding a lock to prevent
+                    // multiple simultaneous calls since this function isn't thread safe.
+                    [controllerStreamLock lock];
+                    LiSendControllerEvent(buttonFlags, leftTrigger, rightTrigger,
+                                          leftStickX, leftStickY, rightStickX, rightStickY);
+                    [controllerStreamLock unlock];
+                };
+            }
+            else if (controller.gamepad != NULL) {
+                controller.gamepad.valueChangedHandler = ^(GCGamepad *gamepad, GCControllerElement *element) {
+                    short buttonFlags;
+                    
+                    UPDATE_BUTTON(A_FLAG, gamepad.buttonA.pressed);
+                    UPDATE_BUTTON(B_FLAG, gamepad.buttonB.pressed);
+                    UPDATE_BUTTON(X_FLAG, gamepad.buttonX.pressed);
+                    UPDATE_BUTTON(Y_FLAG, gamepad.buttonY.pressed);
+                    
+                    UPDATE_BUTTON(UP_FLAG, gamepad.dpad.up.pressed);
+                    UPDATE_BUTTON(DOWN_FLAG, gamepad.dpad.down.pressed);
+                    UPDATE_BUTTON(LEFT_FLAG, gamepad.dpad.left.pressed);
+                    UPDATE_BUTTON(RIGHT_FLAG, gamepad.dpad.right.pressed);
+                    
+                    UPDATE_BUTTON(LB_FLAG, gamepad.leftShoulder.pressed);
+                    UPDATE_BUTTON(RB_FLAG, gamepad.rightShoulder.pressed);
+                    
+                    // We call LiSendControllerEvent while holding a lock to prevent
+                    // multiple simultaneous calls since this function isn't thread safe.
+                    [controllerStreamLock lock];
+                    LiSendControllerEvent(buttonFlags, 0, 0, 0, 0, 0, 0);
+                    [controllerStreamLock unlock];
+                };
+            }
+        }
+    }
+
+}
+
+-(id) init
+{
+    self = [super init];
+    
+    if (controllerStreamLock == NULL) {
+        controllerStreamLock = [[NSLock alloc] init];
+    }
+    
+    self.connectObserver = [[NSNotificationCenter defaultCenter] addObserverForName:GCControllerDidConnectNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
+        [ControllerSupport registerControllerCallbacks];
+    }];
+    self.disconnectObserver = [[NSNotificationCenter defaultCenter] addObserverForName:GCControllerDidDisconnectNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *note) {
+        NSLog(@"Controller disconnected!");
+    }];
+    
+    [ControllerSupport registerControllerCallbacks];
+    
+    return self;
+}
+
+-(void) cleanup
+{
+    [[NSNotificationCenter defaultCenter] removeObserver:self.connectObserver];
+    [[NSNotificationCenter defaultCenter] removeObserver:self.disconnectObserver];
+}
+
+@end

Limelight/StreamFrameViewController.m

@@ -11,12 +11,15 @@
 #import "Connection.h"
 #import "VideoDecoderRenderer.h"
 #import "StreamManager.h"
+#import "ControllerSupport.h"
 
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
-@implementation StreamFrameViewController
+@implementation StreamFrameViewController {
+    ControllerSupport *_controllerSupport;
+}
 
 - (void)viewDidLoad
 {
@@ -24,6 +27,8 @@
 
     [UIApplication sharedApplication].idleTimerDisabled = YES;
     
+    _controllerSupport = [[ControllerSupport alloc] init];
+    
     StreamManager* streamMan = [[StreamManager alloc] initWithHost:[MainFrameViewController getHost] renderView:self.view];
     NSOperationQueue* opQueue = [[NSOperationQueue alloc] init];
     [opQueue addOperation:streamMan];