2025 Refactor of XMI2MID.EXE by Markus Hein / Kimio Ito

Table-of-Contents

• Build
• Usage
• Notes
  • 2025
  • 2023
  • 2015
    • Links
  • 1994
    • Links

Build

Use the Command Prompt for Visual Studio 2022 to run build.cmd included in this repository.

build.cmd

Usage

Supply the path to the XMI file as the first argument.

xmi2mid.exe "C:\Path\To\XMI\Input.xmi" "C:\Path\To\XMI\Output.mid"

Notes

2025

Even though it worked flawlessly, I was never happy with the 2023 version of xmiConverter(). With the help of Grok3 and ChatGPT 4.1 (Preview) I was able to safely reduce the code:

• 🔧 Modern C++ Swagger: Packed with constexpr, auto, and lambdas for code that’s crisp and clean. The old 2023 version leaned on verbose C++ with manual bit-twiddling—now it’s smooth like a freshly tuned synth. 🎹
• 🏗️ Modular Core: The new xmiConverter function handles the heavy lifting, leaving main to deal with file I/O. Back in 2023, everything was jammed into one massive main function—talk about a mess! 🧹
• 🎵 Streamlined Event Handling: Note-off events now rock a sharp NoteOffEvent struct, cutting the cruft from 2023’s clunky NOEVENTS array. Same killer MIDI output, less code. 🎼
• ⏱️ Delta Time Done Right: Helper lambdas (read_varlen, write_varlen) make delta time math a breeze, unlike 2023’s wordy bit-shifting dance. Precision meets elegance! 🕺
• 📜 Tidy Constants: constexpr arrays like midiHeader keep things organized and fast at compile time. The 2023 version had static arrays tweaked at runtime—not bad, but not this slick. ✨
• 💻 Readable Code FTW: Modern syntax and clear logic mean you can actually follow what’s happening. The 2023 code was functional but felt like deciphering ancient runes. 📜
• 🧠 Bloat Begone: Slashed unnecessary overhead for a lighter footprint. The 2023 version was a heavyweight with extra checks and allocations—now we’re nimble! 🏃
• 🔍 Bit-Level Brilliance: Bit manipulations are abstracted into helper functions, making 2023’s explicit bit-twiddling look like a relic. Same accuracy, way clearer. ⚙️
• 📏 Compact and Mighty: Less code, same flawless MIDI output. The 2023 version was a chunky beast—2025 is a ninja, small but deadly. 🥷
• 📂 Flexible Input Handling: xmiConverter takes a std::vector<uint8_t>, letting the CLI handle file reads. The 2023 version did it all itself, but 2025’s ready for bigger stages. 🎤
• 📏 Compact and Mighty: Less code, same flawless MIDI output.

2023

I needed an XMI converter for my 7th Guest Game Engine Re-Creation project, and decided to isolate the converter for others to freely use!

2015

Links

• 2015 Refactor for Visual Studio 2013 by Kimio Ito

1994

Creator	Released	Platform
Markus Hein	1994-02-04	DOS

Links

• Original XMI2MID for DOS from VGMPF