MCPE 0.8.1

An attempt to decompile MCPE 0.8.1 and to make it possible to run it on different platforms. Currently it should be possible to run it on linux and windows. The project is not affiliated with mojang or microsoft.

Building

Cloning the repo and extracting sounds

• Clone the repo with --recursive flag(or use git submodule init and git submodule update after cloning if you forgot to add it)
• Run python tools/get_sound_data.py <path/to/libminecraftpe.so> - it should generate pcm_data.c
• Move pcm_data.c to ./minecraftpe/impl/

Linux

Requires SDL1(libsdl1.2-dev and libsdl1.2debian), OpenAL(libopenal-dev and libopenal1), OpenGL(libgl1-mesa-dev), zlib (zlib1g and zlib1g-dev), curl (libcurl4 and libcurl4-openssl-dev). You must also have original 0.8.1 apk file to extract sounds(won't compile without them) and obtain assets(the compiled file will crash or not work properly without them).

• mkdir build
  cd build
  cmake .. -DJSONCPP_WITH_TESTS=OFF -DJSONCPP_WITH_POST_BUILD_UNITTEST=OFF
  make
  

• the output should be minecraftpe/build/minecraftpe08decomp

Android

Use https://github.com/oldminecraftcommunity/MCPE-0.8.1-Android

Other OSes

Currently the project should also support windows.

Windows version does not require OpenAL(it uses DirectSound instead). It should be possible to cross compile this project for windows by using something like

cmake .. -DJSONCPP_WITH_TESTS=OFF -DJSONCPP_WITH_POST_BUILD_UNITTEST=OFF -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_C_COMPILER=x86_64-w64-mingw32-gcc -DCMAKE_CXX_COMPILER=x86_64-w64-mingw32-g++ -DCMAKE_EXE_LINKER_FLAGS="${CMAKE_EXE_LINKER_FLAGS} -static" -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY -DSDL_LIBRARY=/usr/x86_64-w64-mingw32/lib/SDL.dll -DZLIB_LIBRARY=/usr/x86_64-w64-mingw32/lib/zlib1.dll -DCMAKE_FIND_ROOT_PATH=/usr/x86_64-w64-mingw32/

(def should be simplifed later)

Building on windows was not tested!

Running

• extract assets from real MCPE 0.8.1 apk into the folder you're running the executable from
• run compiled executable

Some additional info:

• JSON library that was probably used by Mojang: https://chromium.googlesource.com/external/jsoncpp/+/6921bf1feef6f1fb83935ae3943f07753488311d/jsoncpp
• RakNet: https://web.archive.org/web/20260101222408if_/http://www.raknet.com/raknet/downloads/RakNet_PC-4.036.zip (might be some other version, probably modifed by mojang in 0.1.x)
• GZIP stuff - zlib 1.2.3, based on https://zlib.net/zpipe.c
• https://github.com/nothings/stb/
• GLM - commit before https://github.com/g-truc/glm/commit/2b747cbbadfd3af39b443e88902f1c98bd231083 and -DGLM_FORCE_RADIANS <?>
• OpenAES - used for realms stuff