Add rumble support

Limelight/Input/ControllerSupport.m

@@ -19,10 +19,12 @@
 #include "Limelight.h"
 
 @import GameController;
+@import AudioToolbox;
 
 @implementation ControllerSupport {
     NSLock *_controllerStreamLock;
     NSMutableDictionary *_controllers;
+    NSTimer *_rumbleTimer;
     
     OnScreenControls *_osc;
     
@@ -42,6 +44,38 @@
 #define UPDATE_BUTTON_FLAG(controller, x, y) \
 ((y) ? [self setButtonFlag:controller flags:x] : [self clearButtonFlag:controller flags:x])
 
+-(void) rumbleController: (Controller*)controller
+{
+    // Only vibrate if the amplitude is large enough
+    if (controller.lowFreqMotor > 0x5000 || controller.highFreqMotor > 0x5000) {
+        // If the gamepad is nil (on-screen controls) or it's attached to the device,
+        // then vibrate the device itself
+        if (controller.gamepad == nil || [controller.gamepad isAttachedToDevice]) {
+            AudioServicesPlayAlertSound(kSystemSoundID_Vibrate);
+        }
+    }
+}
+
+-(void) rumble:(unsigned short)controllerNumber lowFreqMotor:(unsigned short)lowFreqMotor highFreqMotor:(unsigned short)highFreqMotor
+{
+    Controller* controller = [_controllers objectForKey:[NSNumber numberWithInteger:controllerNumber]];
+    if (controller == nil && controllerNumber == 0 && _oscEnabled) {
+        // No physical controller, but we have on-screen controls
+        controller = _player0osc;
+    }
+    if (controller == nil) {
+        // No connected controller for this player
+        return;
+    }
+    
+    // Update the motor levels for the rumble timer to grab next iteration
+    controller.lowFreqMotor = lowFreqMotor;
+    controller.highFreqMotor = highFreqMotor;
+    
+    // Rumble now to ensure short vibrations aren't missed
+    [self rumbleController:controller];
+}
+
 -(void) updateLeftStick:(Controller*)controller x:(short)x y:(short)y
 {
     @synchronized(controller) {
@@ -412,6 +446,23 @@
     return mask;
 }
 
+-(void) rumbleTimer
+{
+    for (int i = 0; i < 4; i++) {
+        Controller* controller = [_controllers objectForKey:[NSNumber numberWithInteger:i]];
+        if (controller == nil && i == 0 && _oscEnabled) {
+            // No physical controller, but we have on-screen controls
+            controller = _player0osc;
+        }
+        if (controller == nil) {
+            // No connected controller for this player
+            continue;
+        }
+        
+        [self rumbleController:controller];
+    }
+}
+
 -(id) initWithConfig:(StreamConfiguration*)streamConfig
 {
     self = [super init];
@@ -433,6 +484,12 @@
     Gamepad_detectDevices();
 #endif
     
+    _rumbleTimer = [NSTimer scheduledTimerWithTimeInterval:0.20
+                                                    target:self
+                                                  selector:@selector(rumbleTimer)
+                                                  userInfo:nil
+                                                   repeats:YES];
+    
     Log(LOG_I, @"Number of supported controllers connected: %d", [ControllerSupport getGamepadCount]);
     Log(LOG_I, @"Multi-controller: %d", _multiController);
     
@@ -492,6 +549,8 @@
 
 -(void) cleanup
 {
+    [_rumbleTimer invalidate];
+    _rumbleTimer = nil;
     [[NSNotificationCenter defaultCenter] removeObserver:self.connectObserver];
     [[NSNotificationCenter defaultCenter] removeObserver:self.disconnectObserver];
     [_controllers removeAllObjects];