public void Play(double durationMS, double frequency, float volume)
{
started = GetUnixTime();
duration = durationMS;
if (debugMode)
{
new Beep((int)frequency, (int)duration, volume).Play();
}
else
{
OpenVRHelper.PlayNote(controller, (float)durationMS / 1000F, (float)frequency, volume);
}
}
static void Run(Settings settings)
{
if (!OpenVRHelper.InitHMD() && !settings.Debug)
{
return;
}
Console.WriteLine("Found {0} devices", OpenVRHelper.DeviceCount());
string inputFile = settings.InputFile;
if (!File.Exists(inputFile))
{
Console.WriteLine("Input file {0} doesn't exist!", inputFile);
return;
}
MidiFile midi = new MidiFile(inputFile, false);
Console.WriteLine("Found {0} devices", OpenVRHelper.DeviceCount());
Player[] players = new Player[OpenVRHelper.DeviceCount()];
for (int i = 0; i < players.Count(); i++)
{
players[i] = new Player(i, settings.Tolerance, settings.Debug);
}
//these will bet set correctly before any notes are played
double bpm = 120;
double ticksPerQuarter = 1;
double msPerQuarter = 1;
int divison = midi.DeltaTicksPerQuarterNote;
int[] trackEventIndex = new int[midi.Events.Count()];
long currentTick = 0;
Stopwatch sw = Stopwatch.StartNew();
int tracksStopped = 0;
//based on https://github.com/ipatix/serialmidi/blob/master/serialmidi/Program.cs
//and https://gitlab.com/Pilatomic/SteamControllerSinger/blob/master/main.cpp
while (true)
{
for (int trackNum = 0; trackNum < midi.Events.Count(); trackNum++)
{
var track = midi.Events[trackNum];
if (trackEventIndex[trackNum] >= track.Count())
{
continue;
}
while (currentTick >= track[trackEventIndex[trackNum]].AbsoluteTime)
{
var ev = track[trackEventIndex[trackNum]];
if (ev.CommandCode == MidiCommandCode.NoteOn)
{
NoteOnEvent note = (NoteOnEvent)ev;
if (note.OffEvent == null)
{
Console.WriteLine("Note {0} doesn't have an off event, skipping.", note.NoteName);
}
else
{
//calculate note duration
double duration = note.NoteLength * msPerQuarter;
//calculate frequency from the note number
//https://pages.mtu.edu/~suits/NoteFreqCalcs.html
double frequency = (440F * Math.Pow(2, (note.NoteNumber - 69) / 12F));
for (int i = 0; i < players.Count(); i++)
{
if (players[i].IsBusy())
{
if (i == players.Count() - 1)
{
Console.WriteLine("Note {0} can't be played because both controllers are busy. Consider changing this part of the song or increasing tolerance time (-t).", note.NoteName);
}
continue;
}
Console.WriteLine("Controller {0}: note {1} ({2:0.##} Hz) for {3:0.##} ms", i, note.NoteName, frequency, duration);
players[i].Play(duration, frequency, settings.Volume);
break;
}
}
}
if (ev.CommandCode == MidiCommandCode.MetaEvent)
{
MetaEvent meta = (MetaEvent)ev;
if (meta.MetaEventType == MetaEventType.SetTempo)
{
TempoEvent tempoEvent = (TempoEvent)meta;
bpm = tempoEvent.Tempo;
if (settings.Debug)
{
Console.WriteLine("New tempo: " + bpm + " BPM");
}
//https://stackoverflow.com/questions/2038313/converting-midi-ticks-to-actual-playback-seconds
ticksPerQuarter = (60 * Stopwatch.Frequency) / (bpm * divison);
msPerQuarter = (60000F / (bpm * divison));
}
}
trackEventIndex[trackNum]++;
if (trackEventIndex[trackNum] == track.Count)
{
tracksStopped++;
if (settings.Debug)
{
Console.WriteLine("Stopped track {0}/{1}", tracksStopped, midi.Events.Count());
}
break;
}
}
}
if (tracksStopped == midi.Events.Count())
{
break;
}
currentTick++;
//just skip cycles for now
while (sw.ElapsedTicks < ticksPerQuarter)
{
;
}
sw.Restart();
}
sw.Stop();
Console.WriteLine("Stopped");
OpenVRHelper.Shutdown();
}