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//*****************************************//
// cmidiin.cpp
// by Gary Scavone, 2003-2004.
//
// Simple program to test MIDI input and
// use of a user callback function.
//
//*****************************************//
#include <iostream>
#include <cstdlib>
#include "RtMidi.h"
void usage( void ) {
// Error function in case of incorrect command-line
// argument specifications.
std::cout << "\nuseage: cmidiin <port>\n";
std::cout << " where port = the device to use (default = 0).\n\n";
exit( 0 );
}
void mycallback( double deltatime, std::vector< unsigned char > *message, void *userData )
{
unsigned int nBytes = message->size();
for ( unsigned int i=0; i<nBytes; i++ )
std::cout << "Byte " << i << " = " << (int)message->at(i) << ", ";
if ( nBytes > 0 )
std::cout << "stamp = " << deltatime << std::endl;
}
// This function should be embedded in a try/catch block in case of
// an exception. It offers the user a choice of MIDI ports to open.
// It returns false if there are no ports available.
bool chooseMidiPort( RtMidiIn *rtmidi );
int main( int argc, char *argv[] )
{
RtMidiIn *midiin = 0;
// Minimal command-line check.
if ( argc > 2 ) usage();
try {
// RtMidiIn constructor
midiin = new RtMidiIn();
// Call function to select port.
if ( chooseMidiPort( midiin ) == false ) goto cleanup;
// Set our callback function. This should be done immediately after
// opening the port to avoid having incoming messages written to the
// queue instead of sent to the callback function.
midiin->setCallback( &mycallback );
// Don't ignore sysex, timing, or active sensing messages.
midiin->ignoreTypes( false, false, false );
std::cout << "\nReading MIDI input ... press <enter> to quit.\n";
char input;
std::cin.get(input);
} catch ( RtError &error ) {
error.printMessage();
}
cleanup:
delete midiin;
return 0;
}
bool chooseMidiPort( RtMidiIn *rtmidi )
{
std::cout << "\nWould you like to open a virtual input port? [y/N] ";
std::string keyHit;
std::getline( std::cin, keyHit );
if ( keyHit == "y" ) {
rtmidi->openVirtualPort();
return true;
}
std::string portName;
unsigned int i = 0, nPorts = rtmidi->getPortCount();
if ( nPorts == 0 ) {
std::cout << "No input ports available!" << std::endl;
return false;
}
if ( nPorts == 1 ) {
std::cout << "\nOpening " << rtmidi->getPortName() << std::endl;
}
else {
for ( i=0; i<nPorts; i++ ) {
portName = rtmidi->getPortName(i);
std::cout << " Input port #" << i << ": " << portName << '\n';
}
do {
std::cout << "\nChoose a port number: ";
std::cin >> i;
} while ( i >= nPorts );
}
std::getline( std::cin, keyHit ); // used to clear out stdin
rtmidi->openPort( i );
return true;
}
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