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/* Copyright (c) 2013-2015, 2017 Stanislaw Halik <sthalik@misaki.pl>
* Copyright (c) 2015 Wim Vriend
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#include "compat/ndebug-guard.hpp"
#include "compat/util.hpp"
#include "ftnoir_protocol_ft.h"
#include "csv/csv.h"
#include "opentrack-library-path.h"
#include <cstddef>
#include <atomic>
#include <cmath>
#include <cstdlib>
#include <windows.h>
#include <intrin.h>
static int page_size()
{
SYSTEM_INFO system_info;
GetSystemInfo(&system_info);
return system_info.dwPageSize;
}
static_assert(sizeof(LONG) == 4u, "");
never_inline void store(float volatile& place, const float value)
{
union
{
float f32;
LONG i32 alignas(alignof(float));
} value_;
value_.f32 = value;
static_assert(sizeof(value_) == sizeof(float), "");
static_assert(offsetof(decltype(value_), f32) == offsetof(decltype(value_), i32), "");
(void)InterlockedExchange((LONG volatile*)&place, value_.i32);
}
template<typename t, typename u>
force_inline
std::enable_if_t<(std::is_integral_v<t>) && sizeof(t) == 4>
store(t volatile& place, u value)
{
(void)InterlockedExchange((LONG volatile*) &place, value);
}
force_inline std::int32_t load(std::int32_t volatile& place)
{
return InterlockedCompareExchange((volatile LONG*) &place, 0, 0);
}
freetrack::freetrack()
{
}
freetrack::~freetrack()
{
if (shm.success())
{
store(pMemData->data.DataID, 1);
store(pMemData->GameID2, -1);
}
dummyTrackIR.close();
}
void freetrack::pose(const double* headpose)
{
const float yaw = -degrees_to_rads(headpose[Yaw]);
const float roll = degrees_to_rads(headpose[Roll]);
const float tx = float(headpose[TX] * 10);
const float ty = float(headpose[TY] * 10);
const float tz = float(headpose[TZ] * 10);
// HACK: Falcon BMS makes a "bump" if pitch is over the value -sh 20170615
const bool is_crossing_90 = std::fabs(headpose[Pitch] - 90) < 1e-4;
const float pitch = -degrees_to_rads(is_crossing_90 ? 89.85 : headpose[Pitch]);
FTHeap volatile* ft = pMemData;
FTData volatile* data = &ft->data;
store(data->X, tx);
store(data->Y, ty);
store(data->Z, tz);
store(data->Yaw, yaw);
store(data->Pitch, pitch);
store(data->Roll, roll);
const std::int32_t id = load(ft->GameID);
store(data->DataID, 60 * 10 + (rand() % 64));
if (intGameID != id)
{
QString gamename;
union {
unsigned char table[8];
std::int32_t ints[2];
} t;
t.ints[0] = 0; t.ints[1] = 0;
(void)CSV::getGameData(id, t.table, gamename);
static_assert(sizeof(LONG) == 4, "");
static_assert(sizeof(int) == 4, "");
// memory mappings are page-aligned due to TLB
if ((std::intptr_t(pMemData) & page_size() - 1) != 0)
assert(!"proto/freetrack: memory mapping not page aligned");
// the data happens to be aligned by virtue of element ordering
// inside `FTHeap'. there's no deeper reason behind it.
static_assert((offsetof(FTHeap, table) & sizeof(int) - 1) == 0, "");
// no atomic access for `char'
for (unsigned k = 0; k < 2; k++)
store(pMemData->table_ints[k], t.ints[k]);
store(ft->GameID2, id);
intGameID = id;
QMutexLocker foo(&game_name_mutex);
connected_game = gamename;
}
}
float freetrack::degrees_to_rads(double degrees)
{
return float(degrees*M_PI/180);
}
void freetrack::start_dummy()
{
static const QString program = OPENTRACK_BASE_PATH + OPENTRACK_LIBRARY_PATH "TrackIR.exe";
dummyTrackIR.setProgram("\"" + program + "\"");
dummyTrackIR.start();
}
void freetrack::set_protocols(bool ft, bool npclient)
{
static const QString program_dir = OPENTRACK_BASE_PATH + OPENTRACK_LIBRARY_PATH;
// Registry settings (in HK_USER)
QSettings settings_ft("Freetrack", "FreetrackClient");
QSettings settings_npclient("NaturalPoint", "NATURALPOINT\\NPClient Location");
if (ft)
settings_ft.setValue("Path", program_dir);
else
settings_ft.setValue("Path", "");
if (npclient)
settings_npclient.setValue("Path", program_dir);
else
settings_npclient.setValue("Path", "");
}
module_status freetrack::initialize()
{
if (!shm.success())
return error(_("Can't load freetrack memory mapping"));
bool use_ft = false, use_npclient = false;
switch (s.intUsedInterface) {
default:
case 0:
use_ft = true;
use_npclient = true;
break;
case 1:
use_ft = true;
break;
case 2:
use_npclient = true;
break;
}
set_protocols(use_ft, use_npclient);
pMemData->data.CamWidth = 100;
pMemData->data.CamHeight = 250;
#if 1
store(pMemData->data.X1, float(100));
store(pMemData->data.Y1, float(200));
store(pMemData->data.X2, float(300));
store(pMemData->data.Y2, float(200));
store(pMemData->data.X3, float(300));
store(pMemData->data.Y3, float(100));
#endif
store(pMemData->GameID2, -1);
for (unsigned k = 0; k < 2; k++)
store(*(std::int32_t volatile*)&pMemData->table_ints[k], 0);
// more games need the dummy executable than previously thought
if (use_npclient)
start_dummy();
return status_ok();
}
OPENTRACK_DECLARE_PROTOCOL(freetrack, FTControls, freetrackDll)
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