smt.h
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00001 /*********************************************************************************************************************** 00002 * 00003 * Sensible UI Inc. 00004 * (c) Copyright 2010-2011 Sensible UI, Inc. 00005 * ALL RIGHTS RESERVED. 00006 * 00007 *********************************************************************************************************************/ 00019 #ifdef __cplusplus 00020 extern "C" { 00021 #endif 00022 00023 #ifndef _SMT_H_ 00024 #define _SMT_H_ 00025 00026 #ifdef WIN32 00027 //#include "stdafx.h" 00028 #include <stdio.h> 00029 #include <tchar.h> 00030 //#include <afxwin.h> 00031 #include <windows.h> 00032 //#include "forcelib.h" 00033 #endif 00034 00035 #include <stdio.h> 00036 #include <string.h> 00037 #include <assert.h> 00038 #include <math.h> 00039 //#include "smt.h" 00040 00041 // Default values 00042 #define DEFAULT_NCOL_SENSOR 640 // Sensor size 00043 #define DEFAULT_NROW_SENSOR 480 00044 //#define DEFAULT_NCOL_PROC 128//16//128 Size of multi-touch data processing 00045 //#define DEFAULT_NROW_PROC 96//16//96 00046 #define DEFAULT_NCOL_PROC 320//16//128 Size of multi-touch data processing 00047 #define DEFAULT_NROW_PROC 240//16//96 00048 00049 // Maximum allowed values 00050 #define MAX_COORD 100 //! Determine range of resultant xy touch position (0~MAX_COORD) 00051 #define MAXCOL 640 //! Sensor & data processing size 00052 #define MAXROW 480 00053 #define MAXFILTERSIZE 10 // Size of spatial filters 00054 #define MAXTOUCH 100 00055 #define MAX_EVENT 100 00056 00057 // Flow control of multi-touch algorithm 00058 extern int mt_do_smoothing; 00059 extern int mt_do_highpass; 00060 extern int mt_do_smoothing2; 00061 00062 // Run-time values 00063 extern int mt_ncol_sensor; // Sensor size 00064 extern int mt_nrow_sensor; 00065 extern int mt_ncol_proc; // Data size 00066 extern int mt_nrow_proc; 00067 00068 // Run-time processing results 00069 extern int mt_sensor_data[MAXCOL*MAXROW]; 00070 extern int mt_sensor_data_temp[MAXCOL*MAXROW]; 00071 extern int mt_resized[MAXCOL*MAXROW]; 00072 extern int mt_offset[MAXCOL*MAXROW]; 00073 extern int mt_diff[MAXCOL*MAXROW]; 00074 extern int mt_smoothing[MAXCOL*MAXROW]; 00075 extern int mt_highpass[MAXCOL*MAXROW]; 00076 extern int mt_highpass_smoothing[MAXCOL*MAXROW]; 00077 extern float mt_amplification[MAXCOL*MAXROW]; 00078 extern int mt_BW[MAXCOL*MAXROW]; 00079 extern int mt_LABEL[MAXCOL*MAXROW]; // Labeling result 00080 00081 // Multi-touch processing results 00082 extern int mt_nevent; // number of touch events 00083 extern int mt_noldevent; // number of previous events 00084 extern int mt_ntouch; // number of valid touches 00085 extern int mt_nlabel; // number of blobs 00086 extern int mt_noldtouch; // number of previous valid touches 00087 00088 // Algorithm parameters 00089 extern int mt_masksize; // For edge detection 00090 extern int mt_masksize1; // For average filtering 00091 extern float mt_min_amplification_range; // For amplification 00092 extern float mt_max_amplification_range; 00093 extern int mt_npower; 00094 00095 extern int mt_max_sensor; // Maximum value of sensor data (currently 0~255) 00096 00097 extern int mt_bwthreshold1; // For thresholding 00098 extern int mt_bwthreshold2; 00099 00100 00101 extern int mt_th_min_area, mt_th_max_area; 00102 extern float mt_th_dist2; 00103 00104 extern int mt_nevent; // number of events for current time 00105 extern int mt_angle; // angle of line connecting two touch points 00106 extern float mt_scale; // length of line connecting two touch points 00107 extern int mt_oldangle; 00108 extern float mt_oldscale; 00109 00110 extern float mt_xmin_n, mt_xmax_n, mt_ymin_n, mt_ymax_n; // Normalization parameters (TSP coordinates -> [0, 1]) 00111 00112 extern int mt_id_ex; // Global incremental ID to guarantee compatability with TUIO 00113 00114 #ifdef WIN32 00115 extern float mt_time_resize; 00116 extern float mt_time_diff; 00117 extern float mt_time_smoothing; 00118 extern float mt_time_highpass; 00119 extern float mt_time_smoothing2; 00120 extern float mt_time_amplificadtion; 00121 extern float mt_time_bw; 00122 extern float mt_time_labeling; 00123 extern float mt_time_runsmt; 00124 #endif 00125 00126 typedef struct tagTOUCHBLOB { 00127 int id; 00128 int id_ex; 00129 int raw_area; 00130 float area; 00131 float x; 00132 float y; 00133 float raw_x; 00134 float raw_y; 00135 float dist2; 00136 int flag_move; 00137 int sum_signal; 00138 float pressure; 00139 } TOUCHBLOB; 00140 00141 00142 typedef struct tagTOUCHEVENT { 00143 int event; 00144 float x; 00145 float y; 00146 float dx; 00147 float dy; 00148 int num_touch; 00149 int info; 00150 00151 TOUCHBLOB touch[1]; 00152 } TOUCHEVENT; 00153 00154 TOUCHBLOB BLOBS[MAXTOUCH], TOUCH[MAXTOUCH], OLD_TOUCH[MAXTOUCH]; 00155 TOUCHEVENT EVENTLIST[MAX_EVENT]; 00156 TOUCHEVENT EVENTLIST_OLD[MAX_EVENT]; 00157 00158 // Defined Touch Events 00159 #define SWIPE_LEFT 1 00160 #define SWIPE_RIGHT 2 00161 #define SWIPE_UP 3 00162 #define SWIPE_DOWN 4 00163 typedef enum 00164 { 00165 E_NOEVENT, 00166 E_FINGER_DOWN, 00167 E_FINGER_UP, 00168 E_FINGER_MOVE, 00169 E_FINGER_DRAG, 00170 E_TOUCH_START, 00171 E_TAP, 00172 E_RIGHT_TAP, 00173 E_DOUBLE_TAP, 00174 E_FINGER_HOLD, 00175 E_TOUCH_END, 00176 E_ROTATE, 00177 E_SCALE, 00178 E_FLICK, // TODO: FLICK could be deleted because it's similar to Swipe. 00179 E_NFINGER_MOVE, 00180 E_NFINGER_SWIPE, 00181 E_NFINGER_TAP 00182 } TOUCH_EVENTS; 00183 00184 00185 typedef enum 00186 { 00187 TSTATE_IDLE, 00188 TSTATE_DOUBLE_TAP, 00189 TSTATE_UP, 00190 TSTATE_INITPRESS, 00191 TSTATE_MULTITOUCH, 00192 TSTATE_DOWN, 00193 TSTATE_DRAG, 00194 TSTATE_HOLD 00195 } TOUCH_STATES; 00196 00197 00198 00199 //============================================================================= 00200 // Calibration 00201 //============================================================================= 00202 extern float mt_calibration_params[6]; 00203 00204 //============================================================================= 00205 // Function declarations 00206 //============================================================================= 00207 // Multi-touch data processing 00208 void initsmt(void); 00209 void setoffset(void); 00210 void runsmt(void); 00211 void preprocessing(void); 00212 void cclabel(void); 00213 void blobprops(void); 00214 void identtouch(void); 00215 void tracktouch(void); 00216 void gonext(void); 00217 void runsmtwin32(int *x, int *y, int ntouch); 00218 00219 // Event and gesture functions 00220 void gesture_recognition(void); 00221 int flick(void); 00222 int rotate(void); 00223 int scale(void); 00224 void state_machine(void); 00225 void initeventlist(void); 00226 void notifyevent(int eventid, TOUCHBLOB * touch, TOUCHEVENT * tevent, int event_index, float x, float y , float dx, float dy, int num_touch, int info); 00227 00228 // SMT Utilities 00229 void initblob(TOUCHBLOB * b); 00230 void copyblob(TOUCHBLOB * src, TOUCHBLOB * dest); 00231 void addtouch(int x, int y); 00232 void event_to_string(char * s, int e); 00233 void savesnapshot(void); 00234 void copyeventlist(TOUCHEVENT * src, TOUCHEVENT * dst, int n); 00235 void computecaliparams(float * x, float * y, float * xd, float * yd, float * cali); // x[3], y[3], xd[3], yd[3], cali[6] 00236 float computecalipos(float x, float y, float a, float b, float c); 00237 00238 // Common utilities 00239 float linearscale(float x, float min_x, float max_x, float min_y, float max_y); 00240 int iminarray(int * x, int n); 00241 int imaxarray(int * x, int n); 00242 float fminarray(float * x, int n); 00243 float fmaxarray(float * y, int n); 00244 float favgarray(int * x, int n); 00245 int computedist2(int x1, int y1, int x2, int y2); 00246 void meanfilter(int * Iy, int * Ix, int numrow, int numcol, int n); 00247 void meanfilter_threshold(int * Iy, int * Ix, int numrow, int numcol, int n, int apply_filter_threshold); 00248 unsigned int uimin(unsigned int x, unsigned int y); 00249 unsigned int uimax(unsigned int x, unsigned int y); 00250 void imresizenearest(int * x, int nrowx, int ncolx, int * y, int nrowy, int ncoly); 00251 void imresizebilinear(int * x, int nrowx, int ncolx, int * y, int nrowy, int ncoly); 00252 void imresizebicubic(int * x, int nrowx, int ncolx, int * y, int nrowy, int ncoly); 00253 float interpcc(float v1, float v2, float v3, float v4, float d); 00254 int ilimit(int x, int l, int u); 00255 float flimit(float x, float l, float u); 00256 float ucmse(unsigned char * x, unsigned char * y, int n); 00257 float fpower(float a, int b); 00258 void icopyarray(int * src, int * dst, int nlength); 00259 void savearray(FILE * fp, const char * filename, int *x, int n); 00260 unsigned char ucminarray(unsigned char * x, int n); 00261 signed char scminarray(signed char * x, int n); 00262 unsigned char ucmaxarray(unsigned char * y, int n); 00263 void cwise2rwise(int* src, int* dst, int row, int col); 00264 void rwise2cwise(int* src, int* dst, int row, int col); 00265 void backgroundfiltering(unsigned char* src, unsigned char *dst, int row, int col); 00266 00267 #endif 00268 00269 #ifdef __cplusplus 00270 } 00271 #endif
