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// Copyright 2007-2021 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#ifndef QT_NO_DEBUG
# include <stdio.h>
# include <stdlib.h>
#endif
#include <windows.h>
#include <math.h>
#include "../mumble_plugin.h"
static std::wstring wsPluginName;
static std::wstring wsDescription;
struct LinkedMem {
UINT32 uiVersion;
DWORD dwcount;
float fAvatarPosition[3];
float fAvatarFront[3];
float fAvatarTop[3];
wchar_t name[256];
float fCameraPosition[3];
float fCameraFront[3];
float fCameraTop[3];
wchar_t identity[256];
UINT32 context_len;
unsigned char context[256];
wchar_t description[2048];
};
static void about(void *h) {
::MessageBox(reinterpret_cast< HWND >(h), L"Reads audio position information from linked game",
L"Mumble Link Plugin", MB_OK);
}
static HANDLE hMapObject = nullptr;
static LinkedMem *lm = nullptr;
static DWORD last_count = 0;
static DWORD last_tick = 0;
static void unlock() {
lm->dwcount = last_count = 0;
lm->uiVersion = 0;
lm->name[0] = 0;
wsPluginName.assign(L"Link");
wsDescription.clear();
}
static int trylock() {
if ((lm->uiVersion == 1) || (lm->uiVersion == 2)) {
if (lm->dwcount != last_count) {
last_count = lm->dwcount;
last_tick = GetTickCount();
errno_t err = 0;
wchar_t buff[2048];
if (lm->name[0]) {
err = wcscpy_s(buff, 256, lm->name);
if (!err)
wsPluginName.assign(buff);
}
if (!err && lm->description[0]) {
err = wcscpy_s(buff, 2048, lm->description);
if (!err)
wsDescription.assign(buff);
}
if (err) {
wsPluginName.assign(L"Link");
wsDescription.clear();
return false;
}
return true;
}
}
return false;
}
static int fetch(float *avatar_pos, float *avatar_front, float *avatar_top, float *camera_pos, float *camera_front,
float *camera_top, std::string &context, std::wstring &identity) {
if (lm->dwcount != last_count) {
last_count = lm->dwcount;
last_tick = GetTickCount();
} else if ((GetTickCount() - last_tick) > 5000)
return false;
if ((lm->uiVersion != 1) && (lm->uiVersion != 2))
return false;
for (int i = 0; i < 3; ++i) {
avatar_pos[i] = lm->fAvatarPosition[i];
avatar_front[i] = lm->fAvatarFront[i];
avatar_top[i] = lm->fAvatarTop[i];
}
if (lm->uiVersion == 2) {
for (int i = 0; i < 3; ++i) {
camera_pos[i] = lm->fCameraPosition[i];
camera_front[i] = lm->fCameraFront[i];
camera_top[i] = lm->fCameraTop[i];
}
if (lm->context_len > 255)
lm->context_len = 255;
lm->identity[255] = 0;
context.assign(reinterpret_cast< const char * >(lm->context), lm->context_len);
identity.assign(lm->identity);
} else {
for (int i = 0; i < 3; ++i) {
camera_pos[i] = lm->fAvatarPosition[i];
camera_front[i] = lm->fAvatarFront[i];
camera_top[i] = lm->fAvatarTop[i];
}
context.clear();
identity.clear();
}
return true;
}
static const std::wstring getdesc() {
return wsDescription;
}
BOOL WINAPI DllMain(HINSTANCE, DWORD fdwReason, LPVOID) {
bool bCreated = false;
switch (fdwReason) {
case DLL_PROCESS_ATTACH:
wsPluginName.assign(L"Link");
hMapObject = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, L"MumbleLink");
if (!hMapObject) {
hMapObject = CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, PAGE_READWRITE, 0, sizeof(LinkedMem),
L"MumbleLink");
bCreated = true;
if (!hMapObject)
return false;
}
lm = static_cast< LinkedMem * >(MapViewOfFile(hMapObject, FILE_MAP_ALL_ACCESS, 0, 0, 0));
if (!lm) {
CloseHandle(hMapObject);
hMapObject = nullptr;
return false;
}
if (bCreated)
memset(lm, 0, sizeof(LinkedMem));
break;
case DLL_PROCESS_DETACH:
if (lm) {
UnmapViewOfFile(lm);
lm = nullptr;
}
if (hMapObject) {
CloseHandle(hMapObject);
hMapObject = nullptr;
}
break;
}
return true;
}
static std::wstring description(L"Link v1.2.0");
static MumblePlugin linkplug = {
MUMBLE_PLUGIN_MAGIC, description, wsPluginName, about, nullptr, trylock, unlock, getdesc, fetch
};
extern "C" MUMBLE_PLUGIN_EXPORT MumblePlugin *getMumblePlugin() {
return &linkplug;
}
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