147 lines
3.1 KiB
C++
147 lines
3.1 KiB
C++
//*****************************************//
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// midiout.cpp
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// by Gary Scavone, 2003-2004.
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//
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// Simple program to test MIDI output.
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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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// Platform-dependent sleep routines.
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#if defined(WIN32)
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#include <windows.h>
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#define SLEEP( milliseconds ) Sleep( (DWORD) milliseconds )
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#else // Unix variants
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#include <unistd.h>
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#define SLEEP( milliseconds ) usleep( (unsigned long) (milliseconds * 1000.0) )
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#endif
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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( RtMidiOut *rtmidi );
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int main( void )
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{
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RtMidiOut *midiout = 0;
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std::vector<unsigned char> message;
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// RtMidiOut constructor
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try {
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midiout = new RtMidiOut();
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}
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catch ( RtMidiError &error ) {
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error.printMessage();
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exit( EXIT_FAILURE );
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}
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// Call function to select port.
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try {
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if ( chooseMidiPort( midiout ) == false ) goto cleanup;
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}
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catch ( RtMidiError &error ) {
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error.printMessage();
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goto cleanup;
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}
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// Send out a series of MIDI messages.
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// Program change: 192, 5
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message.push_back( 192 );
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message.push_back( 5 );
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midiout->sendMessage( &message );
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SLEEP( 500 );
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message[0] = 0xF1;
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message[1] = 60;
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midiout->sendMessage( &message );
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// Control Change: 176, 7, 100 (volume)
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message[0] = 176;
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message[1] = 7;
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message.push_back( 100 );
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midiout->sendMessage( &message );
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// Note On: 144, 64, 90
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message[0] = 144;
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message[1] = 64;
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message[2] = 90;
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midiout->sendMessage( &message );
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SLEEP( 500 );
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// Note Off: 128, 64, 40
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message[0] = 128;
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message[1] = 64;
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message[2] = 40;
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midiout->sendMessage( &message );
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SLEEP( 500 );
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// Control Change: 176, 7, 40
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message[0] = 176;
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message[1] = 7;
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message[2] = 40;
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midiout->sendMessage( &message );
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SLEEP( 500 );
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// Sysex: 240, 67, 4, 3, 2, 247
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message[0] = 240;
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message[1] = 67;
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message[2] = 4;
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message.push_back( 3 );
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message.push_back( 2 );
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message.push_back( 247 );
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midiout->sendMessage( &message );
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// Clean up
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cleanup:
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delete midiout;
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return 0;
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}
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bool chooseMidiPort( RtMidiOut *rtmidi )
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{
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std::cout << "\nWould you like to open a virtual output 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 output 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 << " Output 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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}
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std::cout << "\n";
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rtmidi->openPort( i );
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return true;
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}
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