Real-time radio tracking for FH6.

This project builds a version.dll proxy that runs inside the game process. It watches radio bank file activity, maps read offsets back to FSB5 samples, correlates those samples with RadioInfo_EN.xml, and emits now-playing telemetry through a named pipe.

The game does not expose a now-playing API. The hook reconstructs the active track from file reads against FMOD .bank files.

The DLL can be universally used by any external listener, such as the Python scrobbler for Last.fm integration. You could also use the DLL for overlays, logging, or other creative uses.

The current method does NOT trigger the anti-cheat, anti-tamper or any suspicious activity as it only observes file reads and does not modify game code or memory. The hooks are narrow and efficient, and the telemetry is emitted asynchronously through a named pipe.

1. The proxy DLL is loaded by the game as version.dll, which follows up by loading the original dll from the game directory named version_original.dll.
2. UserImplementations.cpp starts a background thread.
3. The thread installs Detours hooks for:
   • CreateFileW
   • ReadFile
   • CloseHandle
4. The thread parses media\Audio\RadioInfo_EN.xml into a track metadata table.
5. CreateFileW detects radio track bank files as the game opens them.
6. ReadFile observes read offsets for tracked bank handles.
7. AudioDiagnostics.cpp parses each FSB5 bank and records byte ranges for each sample.
8. RadioTracker.cpp filters startup preload noise, detects station switches, and opens a short read window.
9. When a read offset lands inside a known track range, the DLL emits PLAY, PING, and STOP events through \\.\pipe\molotov.

The hooks are deliberately narrow. They only track radio .bank files and queue telemetry out of the hook path so the game thread is not blocked by pipe I/O.

The DLL writes line-based messages to the named pipe:

PLAY|Artist - Track [Station]
PING|Artist - Track [Station]
STOP|music_inactive|last=Artist - Track [Station]

Important message types are FILE, READ, STATION, FMOD, and TICK.

UserFiles/UserImplementations.cpp

Entry point for the project. It creates the background thread, opens the named pipe lazily, provides logging helpers, loads RadioInfo_EN.xml, initializes the tracking modules, and keeps the periodic diagnostics loop running.

UserFiles/AudioDiagnostics.h

Shared audio-tracking declarations. It defines TrackInfo, which stores the parsed XML metadata used by the bank parser and radio tracker, and declares the public audio diagnostics functions.

UserFiles/AudioDiagnostics.cpp

Installs and owns the Windows API hooks. It tracks opened radio bank handles, converts wide paths to UTF-8, parses FSB5 sample tables from .bank files, maps sample byte ranges to TrackInfo, detects track reads during an armed read window, and emits PLAY, PING, and STOP telemetry.

UserFiles/RadioTracker.h

Public interface for the radio station tracker. It exposes initialization, queued bank-path processing, and the periodic tick.

UserFiles/RadioTracker.cpp

Filters bank-open events into station state. It ignores startup preload noise, tracks which station banks have been seen, extracts station prefixes such as HZ6_R3_, debounces station changes, and arms read windows in AudioDiagnostics.cpp.

UserFiles/FmodEngine.h

Small interface used by RadioTracker.cpp for station readiness and heartbeat reporting.

UserFiles/FmodEngine.cpp

Tracks station readiness and emits lightweight FMOD-phase telemetry. The previous experimental FMOD detour path has been removed; current track detection is handled by the file-read hooks in AudioDiagnostics.cpp.

UserFiles/StringUtils.h

Tools to follow the Do Not Repeat Yourself (DRY) principle for string conversions and formatting.

UserFiles/tinyxml2.h and UserFiles/tinyxml2.cpp

Vendored TinyXML2 parser used to read RadioInfo_EN.xml.

Only target Release|x64 for building.

The project expects Microsoft Detours headers and libraries under:

Detours-src\include
Detours-src\lib.X64

Use the build_detours_x64.bat script to build Detours if you don't have it already.

GitHub Actions downloads the Microsoft Detours and builds it automatically for release builds. Local builds still need Detours-src in the project folder.`.

Typical build command:

msbuild version.sln /p:Configuration=Release /p:Platform=x64 /m

(or press "rebuild version" in Visual Studio with the same configuration)

The output DLL is written to:

x64\Release\version.dll

• The named pipe is \\.\pipe\molotov.
• The XML metadata path must be media\Audio\RadioInfo_EN.xml, relative to the game executable directory.
• Startup radio-bank preload is noisy, so station detection waits for preload progress or the preload timeout before arming normal read windows.
• Track detection is based on observed file reads, not direct FMOD event callbacks.

Please note that I am not affiliated with Microsoft, Turn 10 Studios, Playground Games, Xbox Games Studio, CBS Corporation or Last.fm. This is an unofficial fan-made mod created as a hobby project, I am not funded or asked to make this.