// TODO: improve performance
/// <summary>
/// Converts an instance of the <see cref="MidiEvent"/> to bytes array using the specified
/// minimum size of resulting array.
/// </summary>
/// <param name="midiEvent">MIDI event to convert.</param>
/// <param name="minSize">Minimum size of bytes array representing <paramref name="midiEvent"/>.</param>
/// <returns>Array of bytes representing <paramref name="midiEvent"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="midiEvent"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="minSize"/> is negative.</exception>
public byte[] Convert(MidiEvent midiEvent, int minSize)
{
ThrowIfArgument.IsNull(nameof(midiEvent), midiEvent);
ThrowIfArgument.IsNegative(nameof(minSize), minSize, "Min size is negative.");
_dataBytesStream.Seek(0, SeekOrigin.Begin);
var eventWriter = EventWriterFactory.GetWriter(midiEvent);
eventWriter.Write(midiEvent, _midiWriter, WritingSettings, true);
var buffer = _dataBytesStream.GetBuffer();
var dataSize = _dataBytesStream.Position;
var result = new byte[Math.Max(dataSize, minSize)];
Array.Copy(buffer, 0, result, 0, dataSize);
return(result);
}
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);
}
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 GetEventsToWrite())
{
var eventToWrite = midiEvent;
if (eventToWrite is UnknownMetaEvent && settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteUnknownMetaEvents))
{
continue;
}
//
if (settings.CompressionPolicy.HasFlag(CompressionPolicy.NoteOffAsSilentNoteOn))
{
var noteOffEvent = eventToWrite as NoteOffEvent;
if (noteOffEvent != null)
{
eventToWrite = new NoteOnEvent
{
DeltaTime = noteOffEvent.DeltaTime,
Channel = noteOffEvent.Channel,
NoteNumber = noteOffEvent.NoteNumber
}
}
;
}
//
if (settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteDefaultSetTempo) &&
TrySkipDefaultSetTempo(eventToWrite, ref skipSetTempo))
{
continue;
}
if (settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteDefaultKeySignature) &&
TrySkipDefaultKeySignature(eventToWrite, ref skipKeySignature))
{
continue;
}
if (settings.CompressionPolicy.HasFlag(CompressionPolicy.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.CompressionPolicy.HasFlag(CompressionPolicy.UseRunningStatus);
runningStatus = statusByte;
}
else
{
runningStatus = null;
}
//
eventHandler(eventWriter, eventToWrite, writeStatusByte);
}
}
