internal static MidiFileData ReadMidiFile(string filePath)
{
var data = new MidiFileData();
var reader = FileReaderFactory.CreateReader(filePath);
data.Header = reader.ReadNextChunk() as MThdChunk;
var tracks = new List <MTrkChunk>();
for (int i = 0; i < data.Header.NumberOfTracks; i++)
{
try
{
var track = reader.ReadNextChunk() as MTrkChunk;
if (track != null)
{
tracks.Add(track);
}
else
{
Console.WriteLine(String.Format("Track '{0}' was not read successfully.", i + 1));
}
}
catch (Exception e)
{
reader.SkipCurrentChunk();
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Failed to read track: " + (i + 1));
Console.WriteLine(e);
Console.ForegroundColor = ConsoleColor.Gray;
}
}
data.Tracks = tracks;
return(data);
}
private static MidiOutPortBase ProcessStreaming(int outPortId, MidiFileData fileData,
IEnumerable <MidiFileEvent> notes, MidiOutPortCaps caps)
{
var outPort = new MidiOutStreamPort();
outPort.Open(outPortId);
outPort.BufferManager.Initialize(10, 1024);
outPort.TimeDivision = fileData.Header.TimeDivision;
// TODO: extract Tempo from meta messages from the file.
// 120 bpm (uSec/QuarterNote).
outPort.Tempo = 500000;
Console.WriteLine(String.Format("Midi Out Stream Port '{0}' is now open.", caps.Name));
MidiMessageOutStreamWriter writer = null;
MidiBufferStream buffer = null;
MidiFileEvent lastNote = null;
foreach (var note in notes)
{
if (writer == null)
{
// brute force buffer aqcuirement.
// when callbacks are implemented this will be more elegant.
do
{
buffer = outPort.BufferManager.RetrieveBuffer();
if (buffer != null)
{
break;
}
Thread.Sleep(50);
} while (buffer == null);
writer = new MidiMessageOutStreamWriter(buffer);
}
if (writer.CanWrite(note.Message))
{
if (lastNote != null)
{
// fixup delta time artifically...
writer.Write(note.Message, (int)(note.AbsoluteTime - lastNote.AbsoluteTime));
}
else
{
writer.Write(note.Message, (int)note.DeltaTime);
}
}
else
{
outPort.LongData(buffer);
writer = null;
Console.WriteLine("Buffer sent...");
if (!outPort.HasStatus(MidiPortStatus.Started))
{
outPort.Restart();
}
}
lastNote = note;
}
return(outPort);
}
