![]() ![]() The RtMidiIn class uses an internal callback function or thread to receive incoming MIDI messages from a port or device. Unsigned int nPorts = midiout->getPortCount() Unsigned int nPorts = midiin->getPortCount() ![]() The following example outlines how this can be done. The RtMidiError::printMessage() function.Ī client generally must query the available MIDI ports before deciding which to use. MessagesĪssociated with caught exceptions can be displayed with, for example, Not automatically displayed in RtMidi unless the preprocessorĭefinition _RTMIDI_DEBUG_ is defined during compilation. A client error callbackįunction can be specified (via the RtMidi::setErrorCallback function) There are a number of cases within RtMidi where warning messages mayīe displayed but an exception is not thrown. Many RtMidi methods can "throw" an RtMidiError, most typically if aĭriver error occurs or an invalid function argument is specified. Simple but it does allow errors to be "caught" by RtMidiError::Type. RtMidi uses a C exception handler called RtMidiError, which isĭeclared and defined in RtMidi.h. Further, it is necessary that all class methods that can throw a C exception be called within a try/catch block. However, all uses of RtMidi must begin with construction and must end with class destruction. Obviously, this example doesn't demonstrate any of the real functionality of RtMidi. ![]() The following code example demonstrates default object construction and destruction: The RtMidi classes have been designed to work with "hot pluggable" or virtual (software) MIDI devices, making it possible to connect to MIDI devices that may not have been present when the classes were instantiated. A warning message may also be reported if no MIDI devices are found during instantiation. An RtMidiError can be thrown during instantiation in some circumstances. RtMidi uses C exceptions to report errors, necessitating try/catch blocks around many member functions. Each default constructor attempts to establish any necessary "connections" with the underlying MIDI system. RtMidi is an abstract base class, which itself cannot be instantiated. The first thing that must be done when using RtMidi is to create an instance of the RtMidiIn or RtMidiOut subclasses. Latest Release (30 March 2014): Version 2.1.0 The Windows Kernel Streaming support was removed because it was uncompilable and incomplete. Thus, all references to RtError should be renamed to RtMidiError and the RtError.h file should be deleted. The RtError class was renamed RtMidiError and embedded directly in RtMidi.h. \section whatsnew What's New (Version 2.1)Ī minor API change was made. MIDI data is passed to the user as raw bytes using an std::vector. Input messages are timestamped with delta times in seconds (via a \c double floating point type). RtMidi does not provide timing functionality (i.e., output messages are sent immediately). Each class instance supports only a single MIDI connection. MIDI input and output functionality are separated into two classes, RtMidiIn and RtMidiOut. Where applicable, multiple API support can be compiled and a particular API specified when creating an RtAudio instance. Only one header and one source file for easy inclusion in programming projects Simple, common API across all supported platforms It was designed with the following goals: RtMidi significantly simplifies the process of interacting with computer MIDI hardware and software. ![]() RtMidi is a set of C classes (RtMidiIn, RtMidiOut and API-specific classes) that provides a common API (Application Programming Interface) for realtime MIDI input/output across Linux (ALSA
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