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libADLMIDI

libADLMIDI is a free Software MIDI synthesizer library with OPL3 emulation

Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation:

https://bisqwit.iki.fi/source/adlmidi.html

Semaphore-CI:
AppVeyor CI:
Travis CI:

Differences with original tool

Reverb code has been removed.
Doesn't contains platform specific code. Library can be used with various purposes include making of a custom music decoders for a media players and usage with a games.
Supports custom non-hardcoded WOPL banks and ability to build without of embedded banks

Tested on platforms

Linux GCC 4.8, 4.9, 5.4 / CLang
Mac OS X CLang (Xcode 7.x)
Windows MinGW 4.9.x, 5.2
Android NDK 12b/13
DJGPP GCC 7.2 cross compiler from Linux to MS-DOS 32-bit
OpenBSD
Haiku
Emscripten

Key features

OPL3 emulation with four-operator mode support
FM patches from a number of known PC games, copied from files typical to AIL = Miles Sound System / DMX / HMI = Human Machine Interfaces / Creative IBK.
Stereo sound
Number of simulated OPL3 chips can be specified as 1-100 (maximum channels 1800!)
Pan (binary panning, i.e. left/right side on/off)
Pitch-bender with adjustable range
Vibrato that responds to RPN/NRPN parameters
Sustain (a.k.a. Pedal hold) and Sostenuto enable/disable
MIDI and RMI file support
Real-Time MIDI API support
loopStart / loopEnd tag support (Final Fantasy VII)
111-th controller based loop start (RPG-Maker)
Use automatic arpeggio with chords to relieve channel pressure
Support for multiple concurrent MIDI synthesizers (per-track device/port select FF 09 message), can be used to overcome 16 channel limit
Support for playing Id-software Music File format (IMF)
Support for custom banks of WOPL format
Partial support for GS and XG standards (having more instruments than in one 128:128 GM set and ability to use multiple channels for percussion purposes, and a support for some GS/XG exclusive controllers)
CC74 "Brightness" affects a modulator scale (to simulate frequency cut-off on WT synths)
Portamento support (CC5, CC37, and CC65)
SysEx support that supports some generic, GS, and XG features
Full-panning stereo option (works for emulators only)

How to build

To build libADLMIDI you need to use CMake:

mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make
sudo make install

Notes

To compile for DOS via DJGPP on Linux, use cmake/djgpp/djgpp-cmake.sh script which a wrapper over CMake to pass DJGPP's stuff required for build

License

The library is licensed under in it's parts LGPL 2.1+, GPL v2+, GPL v3+, and MIT.

Nuked OPL3 emulators are licensed under LGPL v2.1+.
DosBox OPL3 emulator is licensed under GPL v2+.
Chip interfaces are licensed under LGPL v2.1+.
File Reader class and MIDI Sequencer is licensed under MIT.
WOPL reader and writer module is licensed under MIT.
Other parts of library are licensed under GPLv3+.

Available CMake options

Library options

CMAKE_INSTALL_PREFIX - destination directory where libADLMIDI will be installed. On Linux it is /usr/local/ by default.
CMAKE_BUILD_TYPE - Build types: Debug or Release. Also MinSizeRel or RelWithDebInfo.
libADLMIDI_STATIC - (ON/OFF, default ON) Build static library
libADLMIDI_SHARED - (ON/OFF, default OFF) Build shared library
WITH_UNIT_TESTS - (ON/OFF, default OFF) Enable unit testing
WITH_MIDI_SEQUENCER - (ON/OFF, default ON) Build with embedded MIDI sequencer. Disable this if you want use library in real-time MIDI drivers or plugins.)
WITH_EMBEDDED_BANKS - (ON/OFF, default ON) Enable or disable embedded banks (Original ADLMIDI and older versions of libADLMIDI are had embedded-only banks with no ability to load custom banks in runtime).
WITH_HQ_RESAMPLER - (ON/OFF, default OFF) Build with support for high quality resampling (requires zita-resampler to be installed)
WITH_MUS_SUPPORT - (ON/OFF, default ON) Build with support for DMX MUS files)
WITH_XMI_SUPPORT - (ON/OFF, default ON) Build with support for AIL XMI files)
USE_DOSBOX_EMULATOR - (ON/OFF, default ON) Enable support for DosBox 0.74 emulator. (Well-accurate and fast)
USE_NUKED_EMULATOR - (ON/OFF, default ON) Enable support for Nuked OPL3 emulator. (Very-accurate, needs more CPU power)
USE_OPAL_EMULATOR - (ON/OFF, default ON) Enable support for Opal emulator by Reality (Taken from RAD v2 release package). (Inaccurate)
USE_JAVA_EMULATOR - (ON/OFF, default ON) Enable support for JavaOPL emulator (Taken from GZDoom). (Semi-accurate)

Utils and extras

WITH_GENADLDATA - (ON/OFF, default OFF) Build and execute the utility which will rebuild the embedded banks database (which is an adldata.cpp file).
WITH_GENADLDATA_COMMENTS - (ON/OFF, default OFF) Enable comments in generated ADLDATA cache file
GENADLDATA_CUSTOM_BANKLIST - (Path) Set the absolute path to the custom INI file that declares a list of embedded banks. If not specified, the banks.ini at the repository root will be used.
WITH_MIDIPLAY - (ON/OFF, default OFF) Build demo MIDI player (Requires SDL2 and also pthread on Windows with MinGW)
MIDIPLAY_WAVE_ONLY - (ON/OFF, default OFF) Build Demo MIDI player without support of real time playing. It will output into WAV only.
WITH_ADLMIDI2 - (ON/OFF, default OFF) Build Classic ADLMIDI MIDI player (Requires SDL2 on Linux and macOS, requires pthread on Windows with MinGW, SDL doesn't required on Windows).
WITH_VLC_PLUGIN - (ON/OFF, default OFF) Compile VLC plugin. For now, works on Linux and VLC. Support for other platforms comming soon!
WITH_WINMMDRV - (ON/OFF, default OFF) (Windows platform only) Compile the WinMM MIDI driver to use libOPNMIDI as a system MIDI device.
- WITH_WINMMDRV_PTHREADS - (ON/OFF, default ON) Link libwinpthreads statically (when using pthread-based builds).
- WITH_WINMMDRV_MINGWEX - (ON/OFF, default OFF) Link libmingwex statically (when using vanilla MinGW builds). Useful for targetting to pre-XP Windows versions.
WITH_OLD_UTILS - (ON/OFF, default OFF) Build old utilities to dump some bank formats, made by original creator of ADLMIDI
EXAMPLE_SDL2_AUDIO - (ON/OFF, default OFF) Build also a simple SDL2 demo MIDI player

You also can build library manually:

You need to make in the any IDE a library project and put into it next files (or include those files into subfolder of your exist project instead if you want to use it statically):

Useful macros

BWMIDI_DISABLE_XMI_SUPPORT - Disables XMI to MIDI converter
BWMIDI_DISABLE_MUS_SUPPORT - Disables MUS to MIDI converter
ADLMIDI_DISABLE_MIDI_SEQUENCER - Completely disables built-in MIDI sequencer.
ADLMIDI_DISABLE_DOSBOX_EMULATOR - Disables DosBox 0.74 OPL3 emulator.
ADLMIDI_DISABLE_NUKED_EMULATOR - Disables Nuked OPL3 emulator.
DISABLE_EMBEDDED_BANKS - Disables usage of embedded banks. Use it to use custom-only banks.

Public header (include)

adlmidi.h - Library Public API header, use it to control library

Internal code (src)

chips/* - Various OPL3 chip emulators and commonized interface over them
wopl/* - WOPL bank format library
adldata.hh - bank structures definition
adldata_db.h - Embedded banks database structures and containers definitions
adlmidi_private.hpp - header of internal private APIs
adlmidi_bankmap.h - MIDI bank hash table
adlmidi_bankmap.tcc - MIDI bank hash table (Implementation)
adlmidi_cvt.hpp - Instrument conversion template
adlmidi_ptr.hpp - Custom implementations of smart pointers for C++98
file_reader.hpp - Generic file and memory reader
adldata.cpp - Automatically generated database of FM banks from "fm_banks" directory via "gen_adldata" tool. Don't build it if you defined the DISABLE_EMBEDDED_BANKS macro!
adlmidi.cpp - code of library
adlmidi_load.cpp - Source of file loading and parsing processing
adlmidi_midiplay.cpp - MIDI event sequencer
adlmidi_opl3.cpp - OPL3 chips manager
adlmidi_private.cpp - some internal functions sources

MIDI Sequencer

To remove MIDI Sequencer, define ADLMIDI_DISABLE_MIDI_SEQUENCER macro and remove all those files

adlmidi_sequencer.cpp - MIDI Sequencer related source
cvt_mus2mid.hpp - MUS2MID converter source (define BWMIDI_DISABLE_MUS_SUPPORT macro to remove MUS support)
cvt_xmi2mid.hpp - XMI2MID converter source (define BWMIDI_DISABLE_XMI_SUPPORT macro to remove XMI support)
fraction.hpp - Fraction number handling (Used by Sequencer only)
midi_sequencer.h - MIDI Sequencer C bindings
midi_sequencer.hpp - MIDI Sequencer C++ declaration
midi_sequencer_impl.hpp - MIDI Sequencer C++ implementation (must be once included into one of CPP together with interfaces initializations)

Important: Please use DosBox emulator on mobile devices because it requires small CPU power. Nuked OPL synthesizer is very accurate (compared to real OPL3 chip), but it requires much more power device and is high probability your device will lag and playback will be choppy.

Tip 1: If you want to work with custom WOPL banks without using of embedded banks, you can create them by using OPL3 Bank Editor where also included some WOPL examples, or you are able to save any other bank as WOPL.

Tip 2: To compile libADLMIDI without embedded banks, define the DISABLE_EMBEDDED_BANKS macro and remove building of the adldata.cpp file in your project.

Example

In the utils/midiplay you will found an example project which uses this library. That example is a simple audio player based on SDL Audio usage.

To build that example you will need to have installed SDL2 library.

Working demos

Moondust MusPlay for Win32 and Win64 (also available for other platforms as part of Moondust Project) - a little music player which uses SDL Mixer X library (fork of the SDL Mixer 2.0) which has embedded libADLMIDI to play MIDI files independently from operating system's settings and drivers. <br>(source code of player can be find here and source code of SDL Mixer X here)
ADLMIDI Player for Android - a little MIDI-player for Android which uses libADLMIDI to play MIDI files and provides flexible GUI with ability to change bank, flags, number of emulated chips, etc.
ADLMIDI Player for DOS32 - a little MIDI-player built with DJGPP toolchain for DOS operating system for old computers to play music on the real OPL3 hardware. Archive contains two variants: adlmidi.exe is the main variant; adlmidi2.exe is the reincarnation of original ADLMIDI player by Joel Yliluoma made over modern libADLMIDI backend.

Todo

Check out for XG/GS standards to provide a support to use any channels as percussion and also check some of SysEx commands.
Add support of MIDI Format 2 files

Changelog

dev

Fixed the work on big endian processors
Fixed ARM64 build on some platforms
Improved support of the EA-MUS files (Thanks to dashodanger)
Fixed crash on attempt to change the volume of a blank note
Added an ability to supply the custom list of embedded banks using -DGENADLDATA_CUSTOM_BANKLIST=/path/to/ini/file.ini argument
Improved support of the CMF files: added support for previously missing transpose, depth control, and song marker controllers

1.5.1 2022-10-31

Added an ability to disable the automatical arpeggio
Added an ability to set the count of loops (how many times to play the song)
Added an ability to disable/enable playing of selected MIDI channels
Fixed memory damages and crashes while playing XMI files
Added bank-specific MT32 defaults (to don't confuse XMI playback between different games, works for AIL and IBK only, and for WOPL if set at the header)
Added the chip channels allocation mode option
Fixed the playback of multi-song XMI files
Added an ability to switch the XMI song on the fly

1.5.0.1 2020-10-11

Fixed an incorrect timer processing when using a real-time interface

1.5.0 2020-09-28

Drum note length expanding is now supported in real-time mode (Thanks to Jean Pierre Cimalando for a work!)
Channels manager has been improved (Thanks to Jean Pierre Cimalando for a work!)
Nuked OPL3 1.8 emulator got some optimizations ported from 1.7 where they are was applied previously (Thanks to Jean Pierre Cimalando for a work!)
Reworked rhythm-mode percussions system, WOPL banks with rhythm-mode percussions
Added Public Domain Opal OPL3 emulator made by Reality (a team who originally made the Reality Adlib Tracker) (Thanks to Jean Pierre Cimalando for a work!)
Added LGPL licensed JavaOPL3 emulator made by Robson Cozendey in Java and later rewritten into C++ for GZDoom (Thanks to Jean Pierre Cimalando for a work!)
Fully rewritten an embedded bank database format, embedded banks now supports a wider set (more than 127:127 instruments in one bank)
Improved accuracy of the DMX volume model, include the buggy AM interpretation
Improved accuracy of Apogee volume model, include the bug of AM instruments
Improved accuracy of the Win9X volume model
Removed C++ extras. C++-bounded instruments tester is useless since a real-time MIDI API can completely replace it
Added AIL volume model
Added Generic FM variant of Win9X volume model
Fixed an incorrect work of CC-121 (See https://github.com/Wohlstand/libADLMIDI/issues/227 for details)
Added HMI volume model (Thanks to Alexey Khokholov for help with research!)
Added frequency models, assigned to every volume model: AIL, HMI, DMX, Apogee, 9X, and the Generic formula

1.4.0 2018-10-01

Implemented a full support for Portamento! (Thanks to Jean Pierre Cimalando for a work!)
Added support for SysEx event handling! (Thanks to Jean Pierre Cimalando for a work!)
Added support for GS way of custom drum channels (through SysEx events)
Ignore some NRPN events and lsb bank number when using GS standard (after catching of GS Reset SysEx call)
Added support for CC66-Sostenuto controller (Pedal hold of currently-pressed notes only while CC64 holds also all next notes)
Added support for CC67-SoftPedal controller (SoftPedal lowers the volume of notes played)
Fixed correctness of CMF files playing
Fixed unnecessary overuse of chip channels by blank notes
Added API to disable specific MIDI tracks or play one of MIDI tracks solo
Added support for more complex loop (loopStart=XX, loopEnd=0). Where XX - count of loops, or 0 - infinite. Nested loops are supported without of any limits.
XMIDI now supports loops
Added working implementation of TMB's velocity offset
Added support for full-panning stereo option (Thanks to Christopher Snowhill for a work!)
Fixed inability to play high notes due physical tone frequency out of range on the OPL3 chip

1.3.3 2018-06-19

Fixed an inability to load another custom bank without of library re-initialization
Optimizing the MIDI banks management system for MultiBanks (Thanks to Jean Pierre Cimalando for a work!)
Fixed incorrect 4-op counter which is still catch 4-op instruments on 2-op banks
Fixed an incorrect processing of auto-flags
Fixed incorrect initial MIDI tempo when MIDI file doesn't includes the tempo event
Channel and Note Aftertouch features are now supported correctly! Aftertouch is the tremolo / vibrato, NOT A VOLUME!
Updated DosBox OPL3 emulator up to r4111 of official DosBox trunk (Thanks to Jean Pierre Cimalando for a work!)
The automatical choosing of 4 operator channels count has been improved (Thanks to Jean Pierre Cimalando for a work!)
Added optional HQ resampler for Nuked OPL3 emulators which does usage of Zita-Resampler library (Thanks to Jean Pierre Cimalando for a work!)

1.3.2 2018-04-24

Added ability to disable MUS and XMI converters
Added ability to disable embedded MIDI sequencer to use library as RealTime synthesizer only or use any custom MIDI sequencer plugins.
Fixed blank instruments fallback in multi-bank support. When using non-zero bank, if instrument is blank, then, instrument will be taken from a root (I.e. zero bank).
Added support for real-time switching the emulator
Added support for CC-120 - "All sound off" on the MIDI channel
Changed logic of CC-74 Brightness to affect sound only between 0 and 64 like real XG synthesizers. Ability to turn on a full-ranged brightness (to use full 0...127 range) is kept.
Added support for different output sample formats (PCM8, PCM8U, PCM16, PCM16U, PCM32, PCM32U, Float32, and Float64) (Thanks to Jean Pierre Cimalando for a work!)
Reworked MIDI channels management to avoid any memory reallocations while music processing for a hard real time. (Thanks to Jean Pierre Cimalando for a work!)

1.3.1 2017-12-16

Added Real-Time MIDI API (MIDI event functions and adl_generate() to generate PCM between of event rows) which allows you to implement plugin for media players or even a real time MIDI playing driver.
Fixed some bugs
Fixed initialization that allows to use adl_generate without passing of any files.
No more extra output buffer is used between of PCM output requests
Deep Tremolo and Vibrato now can be toggled without reopening of a MIDI file

1.3.0 2017-10-17

"gen_adldata" tool now supports WOPL banks format which supports a full set of libADLMIDI features
Added support for custom banks are loadable in runtime without rebuilding of "adldata.cpp" banks database
Smooth finalizing of song when loop is disabled (old ugly hack has been removed :wink:)
Added an ability to reset song position to begin (very helpful when song reaches the end)
Avoided possible crashes on attempt to fetch sample data without opening of MIDI file
Demo tool now can correctly record WAVs and now can correctly deal with CTRL+C termination
When loop is disabled, loop points will be ignored
Loop now is disabled by default
Reworked internal storage of MIDI events to easier pre-process them and retrieve any useful information before play them
Added ability to get seconds time position and song length
Added seekability support
Fixed IMF playing when passing file as path nor as memory block
Added ability to get time position of every loop point if presented
Added ability to change playing tempo by giving multiplier (how faster or slower than original)
Added support for meta-tags getting: title, copyright, track titles, and markers with time and ticks positions
Added hooks to increase advandate of The Library: MIDI-event, Note, and Debug-Message hooks!
Fixed the ability to merge two equal pseudo-4-operator voices as one voice without damaging the result!
Added auto-increasing of percussion note lengths when there are too short and playing an incorrect sound on various banks
Tri-state support for deep-tremolo/vibrato, scale modulators, and legacy adlib percussion mode. -1 means "auto", I.e. default and specified by bank.
Added new functions: adl_linkedLibraryVersion(), adl_errorInfo(), adl_tickEvents(), and adl_generate()
Error string is no more global, now every ADL_MIDIPlayer instance has own thread-safe error info that can be retreived by using adl_errorInfo() function. The adl_errorString() will return library initialization errors only;
Added С++ Extra public API which now includes instrument testing feature (which is required by classic ADLMIDI utility)
Multi-bank WOPL files now supported! Feel free to implement GS or XG - compatible bank
Added support for DJGPP compiler to build libADLMIDI for DOS to use hardware OPL3 chip
Added XG percussion bank channel handling support, XG MIDI files are using custom percussion channels are now playing fine!
Fixed damaged playback while loop music caused by state of controllers came from end of current melody
Added Brightness (CC74) controller which will affect modulator scale

1.2.1 2017-07-30

Minor fixes
Added 72'th bank by Sneakernets
Updated "gen_adldata" utility to use ini file

1.2.0 2017-02-15

Fixed 12'th bank where are drums and melodic sets are was swapped
Fxied logariphmic volumes flag which autoreseted to false on playing begin moment
Added TRUE support for MUS and XMI formats (added the conversion functions to make right MIDI data to play it)

1.1.1 2016-12-09

Added a changable volume ranges models (Automatic for some banks, Generic, CMF, DMX, Apogee and 9X)

1.1.0 2016-12-06

Added Nuked OPL3 emulator which is more accurate (but requires more CPU power, therefore kept ability to use DosBox OPL3 via macro)
Fixed warnings of CLang code model plugin
Fixed bend coefficient which makes hi-hats in DOOM banks be incorrectly

1.0.3 2016-08-06

Added handling of 111'th controller as "loopStart" (which used by RPG-Maker)
Fixed infinite loop caused by blank MIDI-files (add extra second of waiting if over 10000 0-waiting loops are been detected)
Fixed damaged playing of IMF files (cased by wrong implementation of getc() function where return type must be int, not unsigned char)

1.0.2 2016-03-16

Fixed infinite loop causes swapped loopEnd and loopStart (when loopEnd goes before loopStart)
Fixed sielent volume tracks (when initial voule is zero, tracks wouldn't be playd even after applying fading in volume events)
More accurate fine tuning for second voice for DMX-based banks (playback now is more like original DOOM than before!)
Library's Output data now in short format (no more need to do extra conversions to make 16-bit audio stream from every 16-bit sample stored into each 32-bit integer)

1.0.0 2015-10-10

First release of library