public MidiEvent Read(MidiReader reader, ReadingSettings settings, byte currentStatusByte)
{
var statusByte = reader.ReadByte();
var size = reader.ReadVlqNumber();
//
MetaEvent metaEvent;
switch (statusByte)
{
case EventStatusBytes.Meta.Lyric:
metaEvent = new LyricEvent();
break;
case EventStatusBytes.Meta.SetTempo:
metaEvent = new SetTempoEvent();
break;
case EventStatusBytes.Meta.Text:
metaEvent = new TextEvent();
break;
case EventStatusBytes.Meta.SequenceTrackName:
metaEvent = new SequenceTrackNameEvent();
break;
case EventStatusBytes.Meta.PortPrefix:
metaEvent = new PortPrefixEvent();
break;
case EventStatusBytes.Meta.TimeSignature:
metaEvent = new TimeSignatureEvent();
break;
case EventStatusBytes.Meta.SequencerSpecific:
metaEvent = new SequencerSpecificEvent();
break;
case EventStatusBytes.Meta.KeySignature:
metaEvent = new KeySignatureEvent();
break;
case EventStatusBytes.Meta.Marker:
metaEvent = new MarkerEvent();
break;
case EventStatusBytes.Meta.ChannelPrefix:
metaEvent = new ChannelPrefixEvent();
break;
case EventStatusBytes.Meta.InstrumentName:
metaEvent = new InstrumentNameEvent();
break;
case EventStatusBytes.Meta.CopyrightNotice:
metaEvent = new CopyrightNoticeEvent();
break;
case EventStatusBytes.Meta.SmpteOffset:
metaEvent = new SmpteOffsetEvent();
break;
case EventStatusBytes.Meta.DeviceName:
metaEvent = new DeviceNameEvent();
break;
case EventStatusBytes.Meta.CuePoint:
metaEvent = new CuePointEvent();
break;
case EventStatusBytes.Meta.ProgramName:
metaEvent = new ProgramNameEvent();
break;
case EventStatusBytes.Meta.SequenceNumber:
metaEvent = new SequenceNumberEvent();
break;
case EventStatusBytes.Meta.EndOfTrack:
metaEvent = new EndOfTrackEvent();
break;
default:
{
Type eventType = null;
metaEvent = settings.CustomMetaEventTypes?.TryGetType(statusByte, out eventType) == true && IsMetaEventType(eventType)
? (MetaEvent)Activator.CreateInstance(eventType)
: new UnknownMetaEvent(statusByte);
}
break;
}
//
var readerPosition = reader.Position;
metaEvent.Read(reader, settings, size);
var bytesRead = reader.Position - readerPosition;
var bytesUnread = size - bytesRead;
if (bytesUnread > 0)
{
reader.Position += bytesUnread;
}
return(metaEvent);
}
private void ProcessEvents(WritingSettings settings, Action <IEventWriter, MidiEvent, bool> eventHandler)
{
byte?runningStatus = null;
var skipSetTempo = true;
var skipKeySignature = true;
var skipTimeSignature = true;
foreach (var midiEvent in Events)
{
var eventToWrite = midiEvent;
if (eventToWrite is SystemCommonEvent || eventToWrite is SystemRealTimeEvent)
{
continue;
}
if (eventToWrite.EventType == MidiEventType.UnknownMeta && settings.DeleteUnknownMetaEvents)
{
continue;
}
//
if (settings.NoteOffAsSilentNoteOn)
{
var noteOffEvent = eventToWrite as NoteOffEvent;
if (noteOffEvent != null)
{
eventToWrite = new NoteOnEvent
{
DeltaTime = noteOffEvent.DeltaTime,
Channel = noteOffEvent.Channel,
NoteNumber = noteOffEvent.NoteNumber
}
}
;
}
//
if (settings.DeleteDefaultSetTempo && TrySkipDefaultSetTempo(eventToWrite, ref skipSetTempo))
{
continue;
}
if (settings.DeleteDefaultKeySignature && TrySkipDefaultKeySignature(eventToWrite, ref skipKeySignature))
{
continue;
}
if (settings.DeleteDefaultTimeSignature && TrySkipDefaultTimeSignature(eventToWrite, ref skipTimeSignature))
{
continue;
}
//
IEventWriter eventWriter = EventWriterFactory.GetWriter(eventToWrite);
var writeStatusByte = true;
if (eventToWrite is ChannelEvent)
{
var statusByte = eventWriter.GetStatusByte(eventToWrite);
writeStatusByte = runningStatus != statusByte || !settings.UseRunningStatus;
runningStatus = statusByte;
}
else
{
runningStatus = null;
}
//
eventHandler(eventWriter, eventToWrite, writeStatusByte);
}
var endOfTrackEvent = new EndOfTrackEvent();
var endOfTrackEventWriter = EventWriterFactory.GetWriter(endOfTrackEvent);
eventHandler(endOfTrackEventWriter, endOfTrackEvent, true);
}