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