Drumstick 介绍
Drumstick 是一个ALSA的音序器 （MIDI 接口）的C++封装库
示例代码：
#include <QApplication>
#include <drumstick.h>
int main(int argc, char **argv) {
QApplication app(argc, argv, false);
// create a client object on the heap
drumstick::MidiClient *client = new drumstick::MidiClient;
client->open();
client->setClientName( "MyClient" );
// create the port
drumstick::MidiPort *port = client->createPort();
port->setPortName( "MyPort" );
port->setCapability( SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ );
port->setPortType( SND_SEQ_PORT_TYPE_MIDI_GENERIC );
// subscribe the port to some other client:port
port->subscribeTo( "20:0" ); // or "name:port", like in "KMidimon:0"
// create an event object on the stack, to send a note on message
drumstick::NoteOnEvent ev( 0, 66, 100 ); // (channel, note number, velocity)
ev.setSource( port->getPortId() );
ev.setSubscribers(); // deliver to all the connected ports
ev.setDirect(); // not scheduled, deliver immediately
client->output( &ev ); // or outputDirect() if you prefer not buffered
client->drainOutput(); // flush the buffer
// close and clean
client->close();
delete client;
return 0;
}