b-viguier / phprtmidi

Php library for realtime MIDI input/output, thanks to RtMidi and FFI.

PhpRtMidi

Php library for realtime MIDI input/output, thanks to RtMidi and FFI.

Requirements

• Php >=7.4 (for FFI support)
• RtMidi v6 library compiled on your system.

Installation

composer require bviguier/php-rtmidi

On MacOS, you can install RtMidi globally thanks to brew.

brew install rtmidi

⚠️ In Linux, package registries often provide librtmidi.so.4 which is the version 3! To compile it manualy:

• Download and extract http://www.music.mcgill.ca/~gary/rtmidi/release/rtmidi-4.0.0.tar.gz
• ./configure
• make && make install
• Be sure that the library is available in you LD_LIBRARY_PATH or to provide the full path to PhpRtMidi.

Features

• Send midi messages (including system exclusive)
• Receive midi messages (including system exclusive)
• Create virtual input or output

Usage

If the RtMidi is not globally available on your system, you have to provide its path. By default, PhpRtMidi try to load the library by its standard name, but the name may depend on your OS or your build. You can also use LIB_RTMIDI_PATH environment variable to provide the path to the library.

This library doesn't match exactly original RtMidi interfaces, but try to expose a straightforward developer experience.

$browser = new \bviguier\RtMidi\MidiBrowser();

$input = $browser->openInput('My Input');
$output = $browser->openOutput('My Output');

echo "Midi thru enabled, use Ctr-C to exit…\n";
while (true) {
    if ($msg = $input->pullMessage()) {
        $output->send($msg);
    }
    usleep(100);
}

Check examples directory to have a better overview of its usage.