/**
* Reads program change commands.
* +--+--+--+--+--+
* |Bn|00|xx|Cn|yy| where n=channel, xx=bank, yy=preset
* +--+--+--+--+--+
* @param info an Info value object.
* @param val the data.
* @param bank the selected bank, initialised on exit.
* @param preset the selected preset, initialised on exit.
* @return true if frame complete, otherwise false.
*/
bool GSysPC::read(Info& info, int* bank, int* preset) {
bool ret = false;
if(info.serial->available() == 0) return ret; // Available?
int val = info.serial->read(); // The data
if(isControlChange(info.channel, val)) info.index = 0; // Start frame on CC
if(info.index >= BUFSIZE || // Frame started?
info.index == UNDEFINED) return ret;
info.buffer[info.index++] = val; // Store
if(info.index == CMDSIZE) { // Frame complete?
info.index = UNDEFINED; // Reset index
volatile byte* b = &info.buffer[0]; // Buffer pointer
if(b[1] == BANK_SELECT &&
isProgramChange(info.channel, b[3])) { // CC#0 and PC?
*bank = b[2]; // Assign bank
*preset = b[4]; // Assign preset
ret = true; // Finished
}
}
return ret;
} // read()
String MidiMessage::getDescription() const
{
if (isNoteOn()) return "Note on " + MidiMessage::getMidiNoteName (getNoteNumber(), true, true, 3) + " Velocity " + String (getVelocity()) + " Channel " + String (getChannel());
if (isNoteOff()) return "Note off " + MidiMessage::getMidiNoteName (getNoteNumber(), true, true, 3) + " Velocity " + String (getVelocity()) + " Channel " + String (getChannel());
if (isProgramChange()) return "Program change " + String (getProgramChangeNumber()) + " Channel " + String (getChannel());
if (isPitchWheel()) return "Pitch wheel " + String (getPitchWheelValue()) + " Channel " + String (getChannel());
if (isAftertouch()) return "Aftertouch " + MidiMessage::getMidiNoteName (getNoteNumber(), true, true, 3) + ": " + String (getAfterTouchValue()) + " Channel " + String (getChannel());
if (isChannelPressure()) return "Channel pressure " + String (getChannelPressureValue()) + " Channel " + String (getChannel());
if (isAllNotesOff()) return "All notes off Channel " + String (getChannel());
if (isAllSoundOff()) return "All sound off Channel " + String (getChannel());
if (isMetaEvent()) return "Meta event";
if (isController())
{
String name (MidiMessage::getControllerName (getControllerNumber()));
if (name.isEmpty())
name = String (getControllerNumber());
return "Controller " + name + ": " + String (getControllerValue()) + " Channel " + String (getChannel());
}
return String::toHexString (getRawData(), getRawDataSize());
}
int MidiMessage::getProgramChangeNumber() const noexcept
{
jassert (isProgramChange());
return getRawData()[1];
}
void MidiPlayer::run()
{
// Workaround to fix errors with the Microsoft GS Wavetable Synth on
// Windows 10 - see http://stackoverflow.com/a/32553208/586978
#ifdef _WIN32
CoInitializeEx(nullptr, COINIT_MULTITHREADED);
BOOST_SCOPE_EXIT(this_) {
CoUninitialize();
} BOOST_SCOPE_EXIT_END
#endif
boost::signals2::scoped_connection connection(
mySettingsManager.subscribeToChanges([&]() {
auto settings = mySettingsManager.getReadHandle();
myMetronomeEnabled = settings->get(Settings::MetronomeEnabled);
}));
setIsPlaying(true);
MidiFile::LoadOptions options;
options.myEnableMetronome = true;
options.myRecordPositionChanges = true;
// Load MIDI settings.
int api;
int port;
{
auto settings = mySettingsManager.getReadHandle();
myMetronomeEnabled = settings->get(Settings::MetronomeEnabled);
api = settings->get(Settings::MidiApi);
port = settings->get(Settings::MidiPort);
options.myMetronomePreset = settings->get(Settings::MetronomePreset) +
Midi::MIDI_PERCUSSION_PRESET_OFFSET;
options.myStrongAccentVel =
settings->get(Settings::MetronomeStrongAccent);
options.myWeakAccentVel = settings->get(Settings::MetronomeWeakAccent);
options.myVibratoStrength = settings->get(Settings::MidiVibratoLevel);
options.myWideVibratoStrength =
settings->get(Settings::MidiWideVibratoLevel);
}
MidiFile file;
file.load(myScore, options);
const int ticks_per_beat = file.getTicksPerBeat();
// Merge the MIDI evvents for each track.
MidiEventList events;
for (MidiEventList &track : file.getTracks())
{
track.convertToAbsoluteTicks();
events.concat(track);
}
// TODO - since each track is already sorted, an n-way merge should be faster.
std::stable_sort(events.begin(), events.end());
events.convertToDeltaTicks();
// Initialize RtMidi and set the port.
MidiOutputDevice device;
if (!device.initialize(api, port))
{
emit error(tr("Error initializing MIDI output device."));
return;
}
bool started = false;
int beat_duration = Midi::BEAT_DURATION_120_BPM;
const SystemLocation start_location(myStartLocation.getSystemIndex(),
myStartLocation.getPositionIndex());
SystemLocation current_location = start_location;
for (auto event = events.begin(); event != events.end(); ++event)
{
if (!isPlaying())
break;
if (event->isTempoChange())
beat_duration = event->getTempo();
// Skip events before the start location, except for events such as
// instrument changes. Tempo changes are tracked above.
if (!started)
{
if (event->getLocation() < start_location)
{
if (event->isProgramChange())
device.sendMessage(event->getData());
continue;
}
else
{
performCountIn(device, event->getLocation(), beat_duration);
started = true;
}
}
const int delta = event->getTicks();
assert(delta >= 0);
const int duration_us = boost::rational_cast<int>(
boost::rational<int>(delta, ticks_per_beat) * beat_duration);
usleep(duration_us * (100.0 / myPlaybackSpeed));
// Don't play metronome events if the metronome is disabled.
if (event->isNoteOnOff() && event->getChannel() == METRONOME_CHANNEL &&
!myMetronomeEnabled)
{
continue;
}
device.sendMessage(event->getData());
// Notify listeners of the current playback position.
if (event->getLocation() != current_location)
{
const SystemLocation &new_location = event->getLocation();
// Don't move backwards unless a repeat occurred.
if (new_location < current_location && !event->isPositionChange())
continue;
if (new_location.getSystem() != current_location.getSystem())
emit playbackSystemChanged(new_location.getSystem());
emit playbackPositionChanged(new_location.getPosition());
current_location = new_location;
}
}
}
