Positional Audio support for Rocket League

Thanks to @mkrautz on Mumble IRC Chat for the compile fix (#2195) and for helping me about memory addresses (pModule).
This probably would not have been possible without his help.
Thanks also to @hacst: he tried to troubleshoot my compile problem.

plugins/rl/rl.cpp

@@ -0,0 +1,118 @@
+// Copyright 2016 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>.
+
+#include "../mumble_plugin_win32.h"
+
+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) {
+	for (int i=0;i<3;i++)
+		avatar_pos[i]=avatar_front[i]=avatar_top[i]=0.0f;
+
+        // char state;
+	bool ok;
+        // Create containers to stuff our raw data into, so we can convert it to Mumble's coordinate system
+	float pos_corrector[3];
+	float front_corrector[3];
+	float top_corrector[3];
+
+	/*
+		value is <     >
+	*/
+	// ok = peekProc((BYTE *) 0x<offset>, &state, 1); // Magical state value
+	// if (! ok)
+	//	return false;
+
+	// if (state == 0)
+	//  return true; // This results in all vectors beeing zero which tells Mumble to ignore them.
+
+        // Peekproc and assign game addresses to our containers, so we can retrieve positional data
+	ok = peekProc((BYTE *) pModule + 0x015E5EB0, &pos_corrector, 12) &&
+	     peekProc((BYTE *) pModule + 0x015E5EB0, &front_corrector, 12) &&
+	     peekProc((BYTE *) pModule + 0x015E5EB0, &top_corrector, 12);
+
+	if (! ok)
+		return false;
+
+        // X = pModule + 0x015E5EB8
+        // Y = pModule + 0x015E5EB4
+        // Z = pModule + 0x015E5EB0
+	avatar_pos[0] = pos_corrector[2];
+	avatar_pos[1] = pos_corrector[1];
+	avatar_pos[2] = pos_corrector[0];
+
+	for (int i=0;i<3;i++)
+		avatar_pos[i]/=32.0f; // Scale to meters
+
+	avatar_front[0] = front_corrector[2];
+	avatar_front[1] = front_corrector[1];
+	avatar_front[2] = front_corrector[0];
+
+	avatar_top[0] = top_corrector[2];
+	avatar_top[1] = top_corrector[1];
+	avatar_top[2] = top_corrector[0];
+
+	for (int i=0;i<3;i++) {
+		camera_pos[i] = avatar_pos[i];
+		camera_front[i] = avatar_front[i];
+		camera_top[i] = avatar_top[i];
+	}
+
+	return true;
+}
+
+static int trylock(const std::multimap<std::wstring, unsigned long long int> &pids) {
+
+	if (! initialize(pids, L"RocketLeague.exe"))
+		return false;
+
+	// Check if we can get meaningful data from it
+	float apos[3], afront[3], atop[3];
+	float cpos[3], cfront[3], ctop[3];
+	std::wstring sidentity;
+	std::string scontext;
+
+	if (fetch(apos, afront, atop, cpos, cfront, ctop, scontext, sidentity)) {
+		return true;
+	} else {
+		generic_unlock();
+		return false;
+	}
+}
+
+static const std::wstring longdesc() {
+	return std::wstring(L"Supports Rocket League version 1.0.10897.0 without identity nor context support yet.");
+}
+
+static std::wstring description(L"Rocket League (version 1.0.10897.0)");
+static std::wstring shortname(L"Rocket League");
+
+static int trylock1() {
+	return trylock(std::multimap<std::wstring, unsigned long long int>());
+}
+
+static MumblePlugin rlplug = {
+	MUMBLE_PLUGIN_MAGIC,
+	description,
+	shortname,
+	NULL,
+	NULL,
+	trylock1,
+	generic_unlock,
+	longdesc,
+	fetch
+};
+
+static MumblePlugin2 rlplug2 = {
+	MUMBLE_PLUGIN_MAGIC_2,
+	MUMBLE_PLUGIN_VERSION,
+	trylock
+};
+
+extern "C" __declspec(dllexport) MumblePlugin *getMumblePlugin() {
+	return &rlplug;
+}
+
+extern "C" __declspec(dllexport) MumblePlugin2 *getMumblePlugin2() {
+	return &rlplug2;
+}

plugins/rl/rl.pro

@@ -0,0 +1,6 @@
+include(../plugins.pri)
+
+TARGET		= rl
+SOURCES		= rl.cpp
+LIBS		+= -luser32
+