public MidiNoteMessage(uint channel, EMidiCommand command, uint note, uint velocity)
: base(command, channel)
{
switch (command)
{
case EMidiCommand.NoteOn:
action = (velocity == 0) ? EMidiNoteAction.Off : EMidiNoteAction.On;
break;
case EMidiCommand.NoteOff:
action = EMidiNoteAction.Off;
break;
case EMidiCommand.KeyAfterTouch:
action = EMidiNoteAction.VelChange;
break;
}
this.note = note;
this.velocity = velocity;
}
private MidiMessage[] GetMessages()
{
if (messages == null)
{
var msgList = new List <MidiMessage>();
for (int b = 0; b < data.Length; b++)
{
MidiMessage result = null;
uint rawCommand = data[b];
uint channel = (rawCommand & 0x0f) + 1;
EMidiCommand command = (EMidiCommand)(rawCommand & 0xF0);
if (command != EMidiCommand.SystemMessageMask)
{
// Common message
switch (command)
{
case EMidiCommand.NoteOff:
case EMidiCommand.NoteOn:
case EMidiCommand.KeyAfterTouch:
result = new MidiNoteMessage(channel, command, data[++b], data[++b]);
break;
case EMidiCommand.ControlChange:
result = new MidiControlChangeMessage(channel, data[++b], data[++b]);
break;
case EMidiCommand.PatchChange:
result = new MidiPatchChangeMessage(channel, data[++b]);
break;
case EMidiCommand.ChannelAfterTouch:
result = new MidiChannelAfterTouchMessage(channel, data[++b]);
break;
case EMidiCommand.PitchWheelChange:
result = new MidiPitchChangeMessage(channel, data[++b] + ((uint)data[++b] << 7));
break;
default:
throw new InvalidOperationException("Unsupported message in sequence: " + command);
}
}
else if (rawCommand == (uint)EMidiCommand.SystemExclusive)
{
var sysexBody = new List <byte>();
sysexBody.Add((byte)EMidiCommand.SystemExclusive);
byte bodyByte = 0;
while ((bodyByte = data[++b]) != (uint)EMidiCommand.EndOfSystemExclusive)
{
sysexBody.Add(bodyByte);
}
sysexBody.Add((byte)EMidiCommand.EndOfSystemExclusive);
result = new MidiSysexMessage(sysexBody.ToArray());
}
else
{
// System message
throw new InvalidOperationException("Only sysex and common messages supported in sequence");
}
msgList.Add(result);
}
messages = msgList.ToArray();
}
return(messages);
}
public MidiCommonMessage(EMidiCommand command, uint channel) :
base(command, channel)
{
}
private int ParseBuffer(byte[] data, int offset, int length, out MidiMessage message)
{
message = null;
int messageLength = 0;
if (length == 0)
{
// Should not happen
return(0);
}
uint rawCommand = data[offset];
uint channel = (rawCommand & 0x0f) + 1;
EMidiCommand command = (EMidiCommand)(rawCommand & 0xF0);
if (command == EMidiCommand.SystemMessageMask)
{
// System message
channel = 0;
command = (EMidiCommand)rawCommand;
messageLength = 1;
switch (command)
{
case EMidiCommand.TimingClock:
message = new TimingClockMessage();
break;
case EMidiCommand.StartSequence:
message = new StartSequenceMessage();
break;
case EMidiCommand.ContinueSequence:
message = new ContinueSequenceMessage();
break;
case EMidiCommand.StopSequence:
message = new StopSequenceMessage();
break;
case EMidiCommand.ActiveSensing:
message = new ActiveSensingMessage();
break;
case EMidiCommand.SystemExclusive:
messageLength = ParseSysex(data, offset, length, ref message);
break;
}
}
else
{
uint p1 = (length >= 2) ? data[offset + 1] : 0u;
uint p2 = (length >= 3) ? data[offset + 2] : 0u;
// Common message
switch (command)
{
case EMidiCommand.NoteOff:
case EMidiCommand.NoteOn:
case EMidiCommand.KeyAfterTouch:
message = new MidiNoteMessage(channel, command, p1, p2);
messageLength = 3;
break;
case EMidiCommand.ControlChange:
message = new MidiControlChangeMessage(channel, p1, p2);
messageLength = 3;
break;
case EMidiCommand.PatchChange:
message = new MidiPatchChangeMessage(channel, p1);
messageLength = 2;
break;
case EMidiCommand.ChannelAfterTouch:
message = new MidiChannelAfterTouchMessage(channel, p1);
messageLength = 2;
break;
case EMidiCommand.PitchWheelChange:
message = new MidiPitchChangeMessage(channel, p1 + (p2 << 7));
messageLength = 3;
break;
}
// Indicate truncated message in reply
if (length < messageLength)
{
messageLength = -1;
}
}
return(messageLength);
}
// Parse a midi message from a midi input MIM_DATA message
private static MidiMessage ParseShortMessage(uint message)
{
MidiMessage result = null;
uint rawCommand = message & 0xff;
uint channel = (rawCommand & 0x0f) + 1;
EMidiCommand command = (EMidiCommand)(rawCommand & 0xF0);
if (command == EMidiCommand.SystemMessageMask)
{
// System message
channel = 0;
command = (EMidiCommand)rawCommand;
switch (command)
{
case EMidiCommand.TimingClock:
result = new TimingClockMessage();
break;
case EMidiCommand.StartSequence:
result = new StartSequenceMessage();
break;
case EMidiCommand.ContinueSequence:
result = new ContinueSequenceMessage();
break;
case EMidiCommand.StopSequence:
result = new StopSequenceMessage();
break;
case EMidiCommand.ActiveSensing:
result = new ActiveSensingMessage();
break;
}
}
else
{
uint p1 = (message >> 8) & 0xff;
uint p2 = (message >> 16) & 0xff;
// Common message
switch (command)
{
case EMidiCommand.NoteOff:
case EMidiCommand.NoteOn:
case EMidiCommand.KeyAfterTouch:
result = new MidiNoteMessage(channel, command, p1, p2);
break;
case EMidiCommand.ControlChange:
result = new MidiControlChangeMessage(channel, p1, p2);
break;
case EMidiCommand.PatchChange:
result = new MidiPatchChangeMessage(channel, p1);
break;
case EMidiCommand.ChannelAfterTouch:
result = new MidiChannelAfterTouchMessage(channel, p1);
break;
case EMidiCommand.PitchWheelChange:
result = new MidiPitchChangeMessage(channel, p1 + (p2 << 7));
break;
}
}
return(result);
}
// Parse a midi message from a midi file
private static MidiMessage ParseMidiMessage(MidiFileFormatReader mffr, uint runningStatus)
{
MidiMessage result = null;
uint rawCommand;
uint p1 = 0;
bool alreadyReadP1 = false;
// Read the command
rawCommand = mffr.ReadUInt8();
if ((rawCommand & 0x80) == 0x80)
{
// New running status
runningStatus = rawCommand;
}
else
{
// What we just read is actually p1 of a common message
alreadyReadP1 = true;
p1 = rawCommand;
rawCommand = runningStatus;
}
// Get channel
uint channel = (rawCommand & 0x0f) + 1;
EMidiCommand command = (EMidiCommand)(rawCommand & 0xF0);
if (command == EMidiCommand.SystemMessageMask)
{
// System message
channel = 0;
command = (EMidiCommand)rawCommand;
switch (command)
{
// System messages - Exclusive
case EMidiCommand.SystemExclusive:
{
// Determine length of body + end-of-exclusive
uint length = mffr.ReadVarLengthQuantity();
byte[] sysexBody = new byte[length + 1];
// Read body
sysexBody[0] = (byte)EMidiCommand.SystemExclusive;
for (uint b = 0; b < length; b++)
{
sysexBody[b + 1] = mffr.ReadUInt8();
}
// Verify end-of-exclusive
if (sysexBody[length] != (byte)EMidiCommand.EndOfSystemExclusive)
{
throw new FormatException("Sysex of length " + length + " ending with " + sysexBody[length] + " instead of F7");
}
result = new MidiSysexMessage(sysexBody);
break;
}
// System messages - Common
case EMidiCommand.SongPosition:
case EMidiCommand.SongSelect:
case EMidiCommand.TuneRequest:
// System messages - Real time
case EMidiCommand.TimingClock:
case EMidiCommand.StartSequence:
case EMidiCommand.ContinueSequence:
case EMidiCommand.StopSequence:
case EMidiCommand.ActiveSensing:
throw new FormatException(string.Format("Found event type {0} - not supported!", command));
// Meta event
case EMidiCommand.MetaEvent:
result = ParseMidiMetaMessage(mffr);
break;
}
}
else
{
if (!alreadyReadP1)
{
p1 = mffr.ReadUInt8();
}
// Channel message
switch (command)
{
case EMidiCommand.NoteOff:
case EMidiCommand.NoteOn:
case EMidiCommand.KeyAfterTouch:
result = new MidiNoteMessage(channel, command, p1, mffr.ReadUInt8());
break;
case EMidiCommand.ControlChange:
result = new MidiControlChangeMessage(channel, p1, mffr.ReadUInt8());
break;
case EMidiCommand.PatchChange:
result = new MidiPatchChangeMessage(channel, p1);
break;
case EMidiCommand.ChannelAfterTouch:
result = new MidiChannelAfterTouchMessage(channel, p1);
break;
case EMidiCommand.PitchWheelChange:
result = new MidiPitchChangeMessage(channel, p1 + ((uint)mffr.ReadUInt8() << 7));
break;
}
}
result.RunningStatus = runningStatus;
return(result);
}
// Build a serializable midi message from an actual midi message
protected SerMidiMessage(MidiMessage midiMessage)
{
this.command = midiMessage.Command;
this.channel = midiMessage.Channel;
}
