1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/***********************************************************************************
* * FTTypes FTTypes contains the specific type definitions for the *
* * FreeTrack protocol. *
* * It was loosely translated from FTTypes.pas *
* * which was created by the FreeTrack-team. *
* * *
* * Wim Vriend (Developing) *
* * Ron Hendriks (Testing and Research) *
* * *
* * Homepage <http://facetracknoir.sourceforge.net/home/default.htm> *
* * *
* * This program is distributed in the hope that it will be useful, but *
* * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
* * or FITNESS FOR A PARTICULAR PURPOSE. *
* * *
* * *
* * The FreeTrackClient sources were translated from the original Delphi sources *
* * created by the FreeTrack developers. *
*/
#define NP_AXIS_MAX 16383
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <windows.h>
//#include <tchar.h>
#include "ftnoir_protocol_ft/fttypes.h"
#define FT_EXPORT(t) extern "C" __declspec(dllexport) t __stdcall
//
// Functions to create/open the file-mapping
// and to destroy it again.
//
static float scale2AnalogLimits( float x, float min_x, float max_x );
static float getDegreesFromRads ( float rads );
FT_EXPORT(bool) FTCreateMapping(void);
#if 0
static FILE *debug_stream = fopen("c:\\FreeTrackClient.log", "a");
#define dbg_report(...) if (debug_stream) { fprintf(debug_stream, __VA_ARGS__); fflush(debug_stream); }
#else
#define dbg_report(...)
#endif
//
// Handles to 'handle' the memory mapping
//
static HANDLE hFTMemMap = 0;
static FTMemMap *pMemData = 0;
static HANDLE hFTMutex = 0;
static const char* dllVersion = "1.0.0.0";
static const char* dllProvider = "FreeTrack";
//
// DllMain gets called, when the DLL is (un)loaded or a process attaches.
//
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
switch (fdwReason) {
case DLL_PROCESS_ATTACH:
#ifdef WIN64
dbg_report("\n= WIN64 =========================================================================================\n");
#else
dbg_report("\n= WIN32 =========================================================================================\n");
#endif
dbg_report("DllMain: (0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
dbg_report("DllMain: Attach request\n");
DisableThreadLibraryCalls(hinstDLL);
break;
case DLL_PROCESS_DETACH:
dbg_report("DllMain: Detach\n");
dbg_report("DllMain: (0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
dbg_report("==========================================================================================\n");
break;
}
return TRUE;
}
/******************************************************************
* FTGetData (FreeTrackClient.1)
*/
#pragma comment(linker, "/export:FTGetData@4=FTGetData")
FT_EXPORT(bool) FTGetData(PFreetrackData data)
{
// dbg_report("NP_GetData called.");
if (FTCreateMapping() == false) return false;
if (hFTMutex && WaitForSingleObject(hFTMutex, 5) == WAIT_OBJECT_0) {
if (pMemData) {
//
// Limit the range of DataID
//
if (pMemData->data.DataID > 1000) {
pMemData->data.DataID = 0;
}
data->DataID = pMemData->data.DataID;
}
ReleaseMutex(hFTMutex);
}
return true;
}
/******************************************************************
* FTReportName (FreeTrackClient.2)
*/
#pragma comment(linker, "/export:FTReportName@4=FTReportName")
//
// For some mysterious reason, the previously existing function FTReportID has been changed to FTReportName, but with an integer as argument.
// The Delphi-code from the FreeTrack repo suggest a char * as argument, so it cost me an afternoon to figure it out (and keep ArmA2 from crashing).
// Thanks guys!
//
FT_EXPORT(void) FTReportName( int name )
{
dbg_report("FTReportName request (ID = %d).\n", name);
}
/******************************************************************
* FTGetDllVersion (FreeTrackClient.3)
*/
#pragma comment(linker, "/export:FTGetDllVersion@0=FTGetDllVersion")
FT_EXPORT(const char*) FTGetDllVersion(void)
{
dbg_report("FTGetDllVersion request.\n");
return dllVersion;
}
/******************************************************************
* FTProvider (FreeTrackClient.4)
*/
#pragma comment(linker, "/export:FTProvider@0=FTProvider")
FT_EXPORT(const char*) FTProvider(void)
{
dbg_report("FTProvider request.\n");
return dllProvider;
}
//
// Create a memory-mapping to the Freetrack data.
// It contains the tracking data, a handle to the main-window and the program-name of the Game!
//
//
FT_EXPORT(bool) FTCreateMapping(void)
{
//
// Memory-mapping already exists!
//
if ( pMemData != NULL ) {
return true;
}
dbg_report("FTCreateMapping request (pMemData == NULL).\n");
//
// A FileMapping is used to create 'shared memory' between the FTClient and the FTServer.
//
// Try to create a FileMapping to the Shared Memory. This is done to check if it's already there (what
// may mean the face-tracker program is already running).
//
// If one already exists: close it and open the file-mapping to the existing one.
//
hFTMemMap = CreateFileMappingA( INVALID_HANDLE_VALUE , 00 , PAGE_READWRITE , 0 ,
sizeof( FTMemMap ),
(LPCSTR) FT_MM_DATA );
if (hFTMemMap == NULL)
{
pMemData = NULL;
return false;
}
pMemData = (FTMemMap *) MapViewOfFile(hFTMemMap, FILE_MAP_WRITE, 0, 0, sizeof( FTMemMap ) );
hFTMutex = CreateMutexA(NULL, false, FREETRACK_MUTEX);
return true;
}
//
// Destory the FileMapping to the shared memory
//
FT_EXPORT(void) FTDestroyMapping(void)
{
if ( pMemData != NULL ) {
UnmapViewOfFile ( pMemData );
}
CloseHandle( hFTMutex );
CloseHandle( hFTMemMap );
pMemData = 0;
hFTMemMap = 0;
}
//
// 4 convenience
//
static float getDegreesFromRads ( float rads ) {
return (rads * 57.295781f);
}
//
// Scale the measured value to the TIR values
//
static float scale2AnalogLimits( float x, float min_x, float max_x ) {
double y;
double local_x;
local_x = x;
if (local_x > max_x) {
local_x = max_x;
}
if (local_x < min_x) {
local_x = min_x;
}
y = ( NP_AXIS_MAX * local_x ) / max_x;
return (float) y;
}
|
