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#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <limits.h>
#include <unistd.h>
#include <XPLMPlugin.h>
#include <XPLMDisplay.h>
#include <XPLMDataAccess.h>
#include <XPLMCamera.h>
#include <XPLMProcessing.h>
#include "ftnoir_tracker_base/ftnoir_tracker_types.h"
// using Wine name to ease things
#define WINE_SHM_NAME "facetracknoir-wine-shm"
#define WINE_MTX_NAME "facetracknoir-wine-mtx"
typedef struct PortableLockedShm {
void* mem;
int fd, size;
} PortableLockedShm;
typedef struct WineSHM {
double data[6];
int gameid, gameid2;
unsigned char table[8];
bool stop;
} WineSHM;
static PortableLockedShm* lck_posix = NULL;
static WineSHM* shm_posix = NULL;
static void *view_x, *view_y, *view_z, *view_heading, *view_pitch;
static float offset_x, offset_y, offset_z;
PortableLockedShm* PortableLockedShm_init(const char *shmName, const char *mutexName, int mapSize)
{
PortableLockedShm* self = malloc(sizeof(PortableLockedShm));
char shm_filename[NAME_MAX];
shm_filename[0] = '/';
strncpy(shm_filename+1, shmName, NAME_MAX-2);
shm_filename[NAME_MAX-1] = '\0';
sprintf(shm_filename + strlen(shm_filename), "%ld\n", (long) getuid());
//(void) shm_unlink(shm_filename);
self->fd = shm_open(shm_filename, O_RDWR | O_CREAT, 0600);
if (ftruncate(self->fd, mapSize) == 0)
self->mem = mmap(NULL, mapSize, PROT_READ|PROT_WRITE, MAP_SHARED, self->fd, (off_t)0);
else
self->mem = (void*) -1;
return self;
}
void PortableLockedShm_free(PortableLockedShm* self)
{
//(void) shm_unlink(shm_filename);
(void) munmap(self->mem, self->size);
(void) close(self->fd);
free(self);
}
void PortableLockedShm_lock(PortableLockedShm* self)
{
flock(self->fd, LOCK_SH);
}
void PortableLockedShm_unlock(PortableLockedShm* self)
{
flock(self->fd, LOCK_UN);
}
static void reinit_offset() {
offset_x = XPLMGetDataf(view_x);
offset_y = XPLMGetDataf(view_y);
offset_z = XPLMGetDataf(view_z);
}
int write_head_position(
XPLMDrawingPhase inPhase,
int inIsBefore,
void * inRefcon)
{
if (lck_posix != NULL && shm_posix != NULL) {
PortableLockedShm_lock(lck_posix);
XPLMSetDataf(view_x, shm_posix->data[TX] * 1e-2 + offset_x);
XPLMSetDataf(view_y, shm_posix->data[TY] * 1e-2 + offset_y);
XPLMSetDataf(view_z, shm_posix->data[TZ] * 1e-2 + offset_z);
XPLMSetDataf(view_heading, shm_posix->data[RX]);
XPLMSetDataf(view_pitch, shm_posix->data[RY]);
PortableLockedShm_unlock(lck_posix);
}
return 1;
}
PLUGIN_API int XPluginStart ( char * outName, char * outSignature, char * outDescription ) {
view_x = XPLMFindDataRef("sim/aircraft/view/acf_peX");
view_y = XPLMFindDataRef("sim/aircraft/view/acf_peY");
view_z = XPLMFindDataRef("sim/aircraft/view/acf_peZ");
view_heading = XPLMFindDataRef("sim/graphics/view/pilots_head_psi");
view_pitch = XPLMFindDataRef("sim/graphics/view/pilots_head_the");
if (view_x && view_y && view_z && view_heading && view_pitch) {
lck_posix = PortableLockedShm_init(WINE_SHM_NAME, WINE_MTX_NAME, sizeof(WineSHM));
if (lck_posix->mem == (void*)-1) {
fprintf(stderr, "FTNOIR failed to init SHM #1!\n");
return 0;
}
if (lck_posix->mem == NULL) {
fprintf(stderr, "FTNOIR failed to init SHM #2!\n");
return 0;
}
shm_posix = (WineSHM*) lck_posix->mem;
memset(shm_posix, 0, sizeof(WineSHM));
strcpy(outName, "FaceTrackNoIR");
strcpy(outSignature, "FaceTrackNoIR - FreeTrack lives!");
strcpy(outDescription, "Face tracking view control");
fprintf(stderr, "FTNOIR init complete\n");
return 1;
}
return 0;
}
#if 0
static int camera_callback(XPLMCameraPosition_t* outCameraPosition, int inIsLosingControl, void* inRefCon) {
if (!inIsLosingControl && XPLMGetCycleNumber() > 0) {
//XPLMReadCameraPosition(outCameraPosition);
PortableLockedShm_lock(lck_posix);
outCameraPosition->heading = shm_posix->rx * 57.295781;
outCameraPosition->pitch = shm_posix->ry * 57.295781;
outCameraPosition->roll = shm_posix->rz * 57.295781;
outCameraPosition->x = XPLMGetDataf(view_x);
outCameraPosition->y = XPLMGetDataf(view_y);
outCameraPosition->z = XPLMGetDataf(view_z);
PortableLockedShm_unlock(lck_posix);
return 1;
}
return 0;
}
static float flight_loop (
float inElapsedSinceLastCall,
float inElapsedTimeSinceLastFlightLoop,
int inCounter,
void * inRefcon)
{
XPLMControlCamera(xplm_ControlCameraForever, camera_callback, NULL);
// don't want it called anymore
return 0;
}
#endif
PLUGIN_API void XPluginStop ( void ) {
#if 0
// crashes due to race
if (lck_posix)
PortableLockedShm_free(lck_posix);
lck_posix = NULL;
shm_posix = NULL;
#endif
}
PLUGIN_API void XPluginEnable ( void ) {
reinit_offset();
XPLMRegisterDrawCallback(write_head_position, xplm_Phase_LastScene, 1, NULL);
#if 0
XPLMRegisterFlightLoopCallback(flight_loop, -1, NULL);
#endif
}
PLUGIN_API void XPluginDisable ( void ) {
XPLMUnregisterDrawCallback(write_head_position, xplm_Phase_LastScene, 1, NULL);
XPLMSetDataf(view_x, offset_x);
XPLMSetDataf(view_y, offset_y);
XPLMSetDataf(view_z, offset_z);
#if 0
XPLMUnregisterFlightLoopCallback(flight_loop, NULL);
if (XPLMIsCameraBeingControlled(NULL))
XPLMDontControlCamera();
#endif
}
PLUGIN_API void XPluginReceiveMessage(
XPLMPluginID inFromWho,
int inMessage,
void * inParam)
{
if (inMessage == XPLM_MSG_AIRPORT_LOADED)
reinit_offset();
}
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