static void Main(string[] args)
{
try
{
if (args.Length != 1)
{
Console.WriteLine("Usage: MidiDumper File.mid");
return;
}
var midiData = ByteBuffer.FromBuffer(File.ReadAllBytes(args[0]));
var midi = new MidiFile();
midi.Load(midiData);
Console.WriteLine("Division: {0}", midi.Division);
Console.WriteLine("TrackFormat: {0}", midi.TrackFormat);
Console.WriteLine("TimingStandard: {0}", midi.TimingStandard);
Console.WriteLine("Tracks: {0}", midi.Tracks.Length);
Console.WriteLine();
for (int i = 0; i < midi.Tracks.Length; i++)
{
var midiTrack = midi.Tracks[i];
Console.WriteLine("Track {0} ({1} Events)", i, midiTrack.MidiEvents.Length);
ulong absoluteTime = 0;
for (int j = 0; j < midiTrack.MidiEvents.Length; j++)
{
var midiEvent = midiTrack.MidiEvents[j];
Console.WriteLine(" [{0}] Delta[{1}] Chl[{2}] Cmd[{3}] Data1[{4}] Data2[{5}]", absoluteTime,
midiEvent.DeltaTime, midiEvent.Channel, midiEvent.Command, midiEvent.Data1, midiEvent.Data2);
absoluteTime += (ulong) midiEvent.DeltaTime;
}
}
}
catch (Exception e)
{
Console.WriteLine("Failed: {0}", e);
}
}
private void LoadMidiFile(MidiFile midiFile)
{
_tempoChanges = new FastList<MidiFileSequencerTempoChange>();
//Converts midi to sample based format for easy sequencing
float bpm = 120.0f;
//Combine all tracks into 1 track that is organized from lowest to highest absolute time
if (midiFile.Tracks.Length > 1 || midiFile.Tracks[0].EndTime == 0)
midiFile.CombineTracks();
//Convert delta time to sample time
_synthData = new SynthEvent[midiFile.Tracks[0].MidiEvents.Length];
_division = midiFile.Division;
_eventIndex = 0;
CurrentTime = 0;
CurrentTempo = (int)bpm;
//Calculate sample based time using double counter and round down to nearest integer sample.
var absDelta = 0.0;
var absTick = 0;
var absTime = 0.0;
for (int x = 0; x < midiFile.Tracks[0].MidiEvents.Length; x++)
{
var mEvent = midiFile.Tracks[0].MidiEvents[x];
_synthData[x] = new SynthEvent(mEvent);
absTick += mEvent.DeltaTime;
absTime += mEvent.DeltaTime * (60000.0 / (bpm * midiFile.Division));
absDelta += Synth.SampleRate * mEvent.DeltaTime * (60.0 / (bpm * midiFile.Division));
_synthData[x].Delta = (int)(absDelta);
//Update tempo
if (IsTempoMessage(mEvent.Command, mEvent.Data1))
{
var meta = (MetaNumberEvent)mEvent;
bpm = MidiHelper.MicroSecondsPerMinute / meta.Value;
_tempoChanges.Add(new MidiFileSequencerTempoChange(bpm, absTick, (int)(absTime)));
}
}
EndTime = _synthData[_synthData.Length - 1].Delta;
}
public void LoadMidiBytes(byte[] data)
{
if (State != SynthPlayerState.Stopped) return;
var input = ByteBuffer.FromBuffer(data);
try
{
Logger.Info("Loading midi from bytes");
var midi = new MidiFile();
midi.Load(input);
Sequencer.LoadMidi(midi);
IsMidiLoaded = true;
OnMidiLoaded();
Logger.Info("Midi successfully loaded");
if (IsReady) OnReadyForPlay();
FirePositionChanged(0);
}
catch (Exception e)
{
Logger.Error("Could not load midi from bytes " + e);
IsMidiLoaded = false;
Sequencer.UnloadMidi();
OnMidiLoadFailed();
}
}
public bool LoadMidi(MidiFile midiFile)
{
if (IsPlaying) return false;
LoadMidiFile(midiFile);
return true;
}