implement SonarPen

libs/libSonarPen/include/WTSonarPenDriver.h

@@ -0,0 +1,60 @@
+//
+//  WTSonarPenDriver.h
+//
+//  Created by Water Lou on 8/7/14.
+//  Copyright (c) 2014 First Water Tech Ltd. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import <AVFoundation/AVFoundation.h>
+
+extern NSString *const _Nonnull WTSonarPenDriverStateChangedNotification;
+
+typedef NS_ENUM(NSInteger, WTAudioPenDriverState) {
+    WTSonarPenDriverStateInit = 0,              // wait for pen attach
+    WTSonarPenDriverStateCalibrating = 1,       // calc min value (when audio source just switched
+    WTSonarPenDriverStateRunning = 2,           // running
+    WTSonarPenDriverStateCalibratingMax = 3,    // calibrating max value
+    WTSonarPenDriverStateNotSonarPen = 4,       // headphone plugged but no a sonarpen, audio sound disabled
+    WTSonarPenDriverStateWaitingForPermission = 5,  // starting, wait for user permission for microphone
+    WTSonarPenDriverStateNoMicrophonePermission = 6,    // no started, no microphone permission
+};
+
+@class WTSonarPenDriver;
+
+@protocol WTSonarPenDriverDelegate<NSObject>
+@optional
+- (void)sonarPenButtonPressed:(WTSonarPenDriver* _Nonnull)driver;
+@end
+
+
+
+@interface WTSonarPenDriver : NSObject
+
+- (instancetype _Nonnull)init NS_UNAVAILABLE;   // please call initWithApplication instead
+- (instancetype _Nonnull) initWithApplication: (UIApplication * _Nullable)application NS_DESIGNATED_INITIALIZER;
+
+- (void) start;
+- (void) stop;
+
+- (BOOL) isPenDown;  // is pen touched
+- (CGFloat) pressure;    // current pressure
+- (BOOL) isPenAttached;
+- (WTAudioPenDriverState) state; // pen drive state
+
+/// If button on the pen is pressed
+- (BOOL) isButtonDown;
+
+// set to YES, the driver will use current pressure as idle state value
+// developer can set this to YES will no touch is detected, and NO with touch
+@property (nonatomic) BOOL calibratingIdleValue;
+@property (nonatomic) BOOL shouldCheckPenOnStart;   // detect pen when plug
+
+@property (nonatomic, weak, nullable) id <WTSonarPenDriverDelegate> delegate;
+
+//- (void)startFullCalibration;
+
+@end
+
+BOOL isHeadphoneplugged(AVAudioSessionRouteDescription * _Nonnull route);
+

libs/libSonarPen/include/WTSonarPenTouchesHandler.h

@@ -0,0 +1,28 @@
+//
+//  WTSonarPenTouchesHandler.h
+//
+//  Created by Water Lou on 3/7/15.
+//  Copyright (c) 2015 First Water Tech Ltd. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface WTSonarPenTouchesHandler : NSObject
+
+- (void)handleTouches:(UIEvent * _Nullable)event
+                 view:(UIView * _Nonnull)view
+              penDown:(BOOL)penDownStatus;
+
+// check if pen is down
+- (BOOL)isPenDown;
+// check if touch with large size touch
+- (BOOL)isPalmTouchedBySize;
+
+// get pen location if pen is down
+- (CGPoint)penLocation;
+// touch object that detect as pen
+@property(readonly, nullable) UITouch *penTouch;
+
+- (NSInteger)numberOfTouches;
+
+@end