module PortMIDI

Overview

A wrapper around the non-stream-specific LibPortMIDI C bindings, plus some convenience functions for packing and unpacking PortMidi messages and to output midi device information.

Defined in:

port_midi/port_midi.cr

Constant Summary

VERSION = "0.1.0"

Class Method Summary

• .bytes(event : LibPortMIDI::Event) : StaticArray(UInt8, 4)

  Returns an array of the four bytes contained in a PortMidi event.

• .bytes(message : UInt32) : StaticArray(UInt8, 4)

  Returns an array of the four bytes contained in a PortMidi message.

• .count_devices : Int32

  Returns the number of attached MIDI input and output devices.

• .data1(message : UInt32) : UInt8

  Extracts the first data byte from a PortMidi message.

• .data2(message : UInt32) : UInt8

  Extracts the second data byte from a PortMidi message.

• .get_default_input_device_id : Int32

  Returns the default input device ID, as defined by PortMidi.

• .get_default_output_device_id : Int32

  Returns the default output device ID, as defined by PortMidi.

• .get_device_info(device_id : Int32) : DeviceInfo

  Returns a DeviceInfo for device device_id.

• .get_error_text(errnum : LibPortMIDI::PmError) : String

  Returns the error message that corresponds to errnum.

• .init

  Initializes the PortMidi system.

• .list_all_devices

  Lists all MIDI inputs and outputs, along with the port numbers that need to be passed to LibPortMIDI.

• .message(status, data1, data2) : UInt32

  Creates a PortMidi message from three MIDI bytes.

• .raise_error(err : LibPortMIDI::PmError, msg : String)

  Given err, creates and raises an instance of the corresponding Exception subclass with the given msg.

• .status(message : UInt32) : UInt8

  Extracts the status byte from a PortMidi message.

• .terminate

  Terminates PortMidi.

Class Method Detail