/// <summary>
/// Checks if the specified <see cref="NoteOnEvent"/> corresponds to the specified
/// <see cref="NoteOffEvent"/>.
/// </summary>
/// <remarks>
/// Note On event corresponds to Note Off one if it has the same note's number and channel,
/// i.e. those events make up a note.
/// </remarks>
/// <param name="noteOnEvent"><see cref="NoteOnEvent"/> to check <see cref="NoteOffEvent"/> for.</param>
/// <param name="noteOffEvent"><see cref="NoteOffEvent"/> to check <see cref="NoteOnEvent"/> for.</param>
/// <returns>true if <paramref name="noteOnEvent"/> corresponds to <paramref name="noteOffEvent"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="noteOnEvent"/> is null. -or-
/// <paramref name="noteOffEvent"/> is null.</exception>
public static bool IsNoteOnCorrespondToNoteOff(NoteOnEvent noteOnEvent, NoteOffEvent noteOffEvent)
{
ThrowIfArgument.IsNull(nameof(noteOnEvent), noteOnEvent);
ThrowIfArgument.IsNull(nameof(noteOffEvent), noteOffEvent);
return(noteOnEvent.Channel == noteOffEvent.Channel &&
noteOnEvent.NoteNumber == noteOffEvent.NoteNumber);
}
/// <summary>
/// Reads an event from the reader's underlying stream.
/// </summary>
/// <param name="reader">Reader to read an event.</param>
/// <param name="settings">Settings according to which an event must be read.</param>
/// <param name="channelEventStatusByte">Current channel event status byte used as running status.</param>
/// <returns>Instance of the <see cref="MidiEvent"/> representing a MIDI event.</returns>
/// <exception cref="ObjectDisposedException">Method was called after the writer's underlying stream
/// was disposed.</exception>
/// <exception cref="IOException">An I/O error occurred on the writer's underlying stream.</exception>
/// <exception cref="UnexpectedRunningStatusException">Unexpected running status is encountered.</exception>
/// <exception cref="UnknownChannelEventException">Reader has encountered an unknown channel event.</exception>
/// <exception cref="NotEnoughBytesException">Not enough bytes to read an event.</exception>
/// <exception cref="InvalidChannelEventParameterValueException">Value of a channel event's parameter just
/// read is invalid.</exception>
private MidiEvent ReadEvent(MidiReader reader, ReadingSettings settings, ref byte?channelEventStatusByte)
{
var deltaTime = reader.ReadVlqLongNumber();
if (deltaTime < 0)
{
deltaTime = 0;
}
//
var statusByte = reader.ReadByte();
if (statusByte <= SevenBitNumber.MaxValue)
{
if (channelEventStatusByte == null)
{
throw new UnexpectedRunningStatusException();
}
statusByte = channelEventStatusByte.Value;
reader.Position--;
}
//
var eventReader = EventReaderFactory.GetReader(statusByte);
var midiEvent = eventReader.Read(reader, settings, statusByte);
//
if (settings.SilentNoteOnPolicy == SilentNoteOnPolicy.NoteOff)
{
var noteOnEvent = midiEvent as NoteOnEvent;
if (noteOnEvent?.Velocity == 0)
{
midiEvent = new NoteOffEvent
{
DeltaTime = noteOnEvent.DeltaTime,
Channel = noteOnEvent.Channel,
NoteNumber = noteOnEvent.NoteNumber
};
}
}
//
if (midiEvent is ChannelEvent)
{
channelEventStatusByte = statusByte;
}
//
midiEvent.DeltaTime = deltaTime;
return(midiEvent);
}
/// <summary>
/// Gets octave of the note presented by an instance of <see cref="NoteOffEvent"/>.
/// </summary>
/// <param name="noteOffEvent">Note Off event to get note octave of.</param>
/// <returns>Note octave of the <paramref name="noteOffEvent"/> event.</returns>
/// <remarks>
/// Octave number will be returned in scientific pitch notation which means
/// that 4 will be returned for 60 note number.
/// </remarks>
/// <exception cref="ArgumentNullException"><paramref name="noteOffEvent"/> is null.</exception>
public static int GetNoteOctave(this NoteOffEvent noteOffEvent)
{
if (noteOffEvent == null)
{
throw new ArgumentNullException(nameof(noteOffEvent));
}
return(GetNoteOctave(noteOffEvent.NoteNumber));
}
/// <summary>
/// Sets the note number of the <see cref="NoteOffEvent"/> with the specified note name and octave.
/// </summary>
/// <param name="noteOffEvent">Note Off event to set the note number of.</param>
/// <param name="noteName">Name of the note.</param>
/// <param name="octave">Number of the octave.</param>
/// <remarks>
/// Octave number is specified in scientific pitch notation which means that 4 must be
/// passed to get the number of the middle C.
/// </remarks>
/// <exception cref="ArgumentNullException"><paramref name="noteOffEvent"/> is null.</exception>
/// <exception cref="InvalidEnumArgumentException"><paramref name="noteName"/> specified an
/// invalid value.</exception>
/// <exception cref="ArgumentException">Note number is out of range for the specified note
/// name and octave.</exception>
public static void SetNoteNumber(this NoteOffEvent noteOffEvent, NoteName noteName, int octave)
{
if (noteOffEvent == null)
{
throw new ArgumentNullException(nameof(noteOffEvent));
}
noteOffEvent.NoteNumber = GetNoteNumber(noteName, octave);
}
// Token: 0x06003234 RID: 12852 RVA: 0x001470DC File Offset: 0x001452DC
private void ProcessEvents(WritingSettings settings, Action <IEventWriter, MidiEvent, bool> eventHandler)
{
byte?b = null;
bool flag = true;
bool flag2 = true;
bool flag3 = true;
foreach (MidiEvent midiEvent in this.Events.Concat(new EndOfTrackEvent[]
{
new EndOfTrackEvent()
}))
{
if (!(midiEvent is UnknownMetaEvent) || !settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteUnknownMetaEvents))
{
if (settings.CompressionPolicy.HasFlag(CompressionPolicy.NoteOffAsSilentNoteOn))
{
NoteOffEvent noteOffEvent = midiEvent as NoteOffEvent;
if (noteOffEvent != null)
{
midiEvent = new NoteOnEvent
{
DeltaTime = noteOffEvent.DeltaTime,
Channel = noteOffEvent.Channel,
NoteNumber = noteOffEvent.NoteNumber
};
}
}
if ((!settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteDefaultSetTempo) || !TrackChunk.TrySkipDefaultSetTempo(midiEvent, ref flag)) && (!settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteDefaultKeySignature) || !TrackChunk.TrySkipDefaultKeySignature(midiEvent, ref flag2)) && (!settings.CompressionPolicy.HasFlag(CompressionPolicy.DeleteDefaultTimeSignature) || !TrackChunk.TrySkipDefaultTimeSignature(midiEvent, ref flag3)))
{
IEventWriter writer = EventWriterFactory.GetWriter(midiEvent);
bool arg;
if (midiEvent is ChannelEvent)
{
byte statusByte = writer.GetStatusByte(midiEvent);
byte?b2 = b;
int? num = (b2 != null) ? new int?((int)b2.GetValueOrDefault()) : null;
int num2 = (int)statusByte;
arg = (!(num.GetValueOrDefault() == num2 & num != null) || !settings.CompressionPolicy.HasFlag(CompressionPolicy.UseRunningStatus));
b = new byte?(statusByte);
}
else
{
b = null;
arg = true;
}
eventHandler(writer, midiEvent, arg);
}
}
}
}
// Token: 0x06003233 RID: 12851 RVA: 0x00146EB4 File Offset: 0x001450B4
private MidiEvent ReadEvent(MidiReader reader, ReadingSettings settings, ref byte?channelEventStatusByte)
{
long num = reader.ReadVlqLongNumber();
if (num < 0L)
{
num = 0L;
}
this.absTime += num;
byte b = reader.ReadByte();
if (b <= SevenBitNumber.MaxValue)
{
if (channelEventStatusByte == null)
{
throw new UnexpectedRunningStatusException();
}
b = channelEventStatusByte.Value;
long position = reader.Position;
reader.Position = position - 1L;
}
MidiEvent midiEvent = EventReaderFactory.GetReader(b).Read(reader, settings, b);
if (settings.SilentNoteOnPolicy == SilentNoteOnPolicy.NoteOff)
{
NoteOnEvent noteOnEvent = midiEvent as NoteOnEvent;
SevenBitNumber?sevenBitNumber = (noteOnEvent != null) ? new SevenBitNumber?(noteOnEvent.Velocity) : null;
int? num2 = (sevenBitNumber != null) ? new int?((int)sevenBitNumber.GetValueOrDefault()) : null;
if (num2.GetValueOrDefault() == 0 & num2 != null)
{
midiEvent = new NoteOffEvent
{
DeltaTime = noteOnEvent.DeltaTime,
Channel = noteOnEvent.Channel,
NoteNumber = noteOnEvent.NoteNumber
};
}
}
if (midiEvent is ChannelEvent)
{
channelEventStatusByte = new byte?(b);
}
midiEvent.DeltaTime = num;
midiEvent.AbsoluteTime = this.absTime;
if (midiEvent is NoteOnEvent)
{
this.onEvents.Add(this.Events.Count);
}
else if (midiEvent is NoteOffEvent)
{
for (int i = 0; i < this.onEvents.Count; i++)
{
NoteOnEvent noteOnEvent2 = this.Events[this.onEvents[i]] as NoteOnEvent;
if (noteOnEvent2.Channel == ((NoteOffEvent)midiEvent).Channel && noteOnEvent2.NoteNumber == ((NoteOffEvent)midiEvent).NoteNumber)
{
((NoteOnEvent)this.Events[this.onEvents[i]]).OffEvent = (NoteOffEvent)midiEvent;
this.onEvents.RemoveAt(i);
return(null);
}
}
}
return(midiEvent);
}
