Portsmf is "Port Standard MIDI File", a cross-platform, C++ library for reading and writing Standard MIDI Files.

License information: free and open source, see license.txt for details

Building: PortSMF has no dependencies and uses the CMake build system. To build it, run:

$ cmake -DCMAKE_INSTALL_PREFIX=/where/you/want/to/install/to -S . -B build
$ cmake --build build --parallel number-of-cpu-cores
$ cmake --install build

Features:

• input and output of Standard MIDI Files
• data structures, classes, etc. for representing music data in memory
  • sequence structure consisting of multiple tracks
  • track structure consisting of multiple events
  • events contain note and control data
  • extensible attribute-value property lists
  • tempo track and time signature representation
• input and output of a text-based representation: Allegro files
• extensive editing operations on sequences and tracks
• conversion to/from binary buffers for archiving, undo/redo, etc.