初始化内容

third/rtmidi/tests/midiout.cpp

@@ -0,0 +1,170 @@
+//*****************************************//
+//  midiout.cpp
+//  by Gary Scavone, 2003-2004.
+//
+//  Simple program to test MIDI output.
+//
+//*****************************************//
+
+#include <iostream>
+#include <cstdlib>
+#include "RtMidi.h"
+
+// Platform-dependent sleep routines.
+#if defined(_WIN32)
+  #include <windows.h>
+  #define SLEEP( milliseconds ) Sleep( (DWORD) milliseconds ) 
+#else // Unix variants
+  #include <unistd.h>
+  #define SLEEP( milliseconds ) usleep( (unsigned long) (milliseconds * 1000.0) )
+#endif
+
+// 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( RtMidiOut *rtmidi );
+
+RtMidi::Api chooseMidiApi();
+
+int main( void )
+{
+  RtMidiOut *midiout = 0;
+  std::vector<unsigned char> message;
+
+  // RtMidiOut constructor
+  try {
+    midiout = new RtMidiOut(chooseMidiApi());
+  }
+  catch ( RtMidiError &error ) {
+    error.printMessage();
+    exit( EXIT_FAILURE );
+  }
+
+  // Call function to select port.
+  try {
+    if ( chooseMidiPort( midiout ) == false ) goto cleanup;
+  }
+  catch ( RtMidiError &error ) {
+    error.printMessage();
+    goto cleanup;
+  }
+
+  // Send out a series of MIDI messages.
+
+  // Program change: 192, 5
+  message.push_back( 192 );
+  message.push_back( 5 );
+  midiout->sendMessage( &message );
+
+  SLEEP( 500 );
+
+  message[0] = 0xF1;
+  message[1] = 60;
+  midiout->sendMessage( &message );
+
+  // Control Change: 176, 7, 100 (volume)
+  message[0] = 176;
+  message[1] = 7;
+  message.push_back( 100 );
+  midiout->sendMessage( &message );
+
+  // Note On: 144, 64, 90
+  message[0] = 144;
+  message[1] = 64;
+  message[2] = 90;
+  midiout->sendMessage( &message );
+
+  SLEEP( 500 );
+
+  // Note Off: 128, 64, 40
+  message[0] = 128;
+  message[1] = 64;
+  message[2] = 40;
+  midiout->sendMessage( &message );
+
+  SLEEP( 500 );
+
+  // Control Change: 176, 7, 40
+  message[0] = 176;
+  message[1] = 7;
+  message[2] = 40;
+  midiout->sendMessage( &message );
+
+  SLEEP( 500 );
+
+  // Sysex: 240, 67, 4, 3, 2, 247
+  message[0] = 240;
+  message[1] = 67;
+  message[2] = 4;
+  message.push_back( 3 );
+  message.push_back( 2 );
+  message.push_back( 247 );
+  midiout->sendMessage( &message );
+
+  // Clean up
+ cleanup:
+  delete midiout;
+
+  return 0;
+}
+
+bool chooseMidiPort( RtMidiOut *rtmidi )
+{
+  std::cout << "\nWould you like to open a virtual output 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 output 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 << "  Output port #" << i << ": " << portName << '\n';
+    }
+
+    do {
+      std::cout << "\nChoose a port number: ";
+      std::cin >> i;
+    } while ( i >= nPorts );
+  }
+
+  std::cout << "\n";
+  rtmidi->openPort( i );
+
+  return true;
+}
+
+RtMidi::Api chooseMidiApi()
+{
+  std::vector< RtMidi::Api > apis;
+  RtMidi::getCompiledApi(apis);
+
+  if (apis.size() <= 1)
+    return RtMidi::Api::UNSPECIFIED;
+
+  std::cout << "\nAPIs\n  API #0: unspecified / default\n";
+  for (size_t n = 0; n < apis.size(); n++)
+    std::cout << "  API #" << apis[n] << ": " << RtMidi::getApiDisplayName(apis[n]) << "\n";
+
+  std::cout << "\nChoose an API number: ";
+  unsigned int i;
+  std::cin >> i;
+
+  std::string dummy;
+  std::getline(std::cin, dummy);  // used to clear out stdin
+
+  return static_cast<RtMidi::Api>(i);
+}