/// <summary>
/// Dump the Midi content as a human readable text file
/// </summary>
/// <param name="sequence">The sequence to be dumped.</param>
/// <param name="outputFilePath">text file to store dump to</param>
public static void DumpMidi(this Sequence sequence, string outputFilePath)
{
int trackno = 1;
using (var outfile = new StreamWriter(outputFilePath, false)) {
// write header
string midiTypeName = MidiHelper.GetMidiFormatString(sequence.MidiFileType);
outfile.WriteLine("Midi Type: {0} = {1}", sequence.MidiFileType, midiTypeName);
float divisionType = sequence.DivisionType;
string divisionTypeString = "";
if (divisionType == Sequence.PPQ)
{
divisionTypeString = "PPQ";
}
else if (divisionType == Sequence.SMPTE_24)
{
divisionTypeString = "SMPTE_24";
}
else if (divisionType == Sequence.SMPTE_25)
{
divisionTypeString = "SMPTE_25";
}
else if (divisionType == Sequence.SMPTE_30)
{
divisionTypeString = "SMPTE_30";
}
else if (divisionType == Sequence.SMPTE_30DROP)
{
divisionTypeString = "SMPTE_30DROP";
}
outfile.WriteLine("Division Type: {0} = {1}", divisionTypeString, divisionType);
outfile.WriteLine("Resolution: {0}", sequence.Resolution);
outfile.WriteLine("Tracks: {0}", sequence.Tracks.Count);
outfile.WriteLine("Time: {0} ticks", sequence.GetTickLength());
outfile.WriteLine();
foreach (var track in sequence.Tracks)
{
outfile.WriteLine("Track {0}", trackno);
foreach (var ev in track.Events)
{
long tick = ev.Tick;
int beat = (int)tick / sequence.Resolution;
int tickRemainder = (int)tick % sequence.Resolution;
MidiMessage msg = ev.Message;
outfile.WriteLine("{0:0000}:{1:000} {2}", beat, tickRemainder, msg);
}
trackno++;
}
}
}
/// <summary>
/// Return the string representation of this object
/// </summary>
/// <returns>the string representation of this object</returns>
public override string ToString()
{
// GetMetaStrings: { type name, length, value string }
object[] meta = this.GetMetaStrings();
string metaStrings = string.Format("{0,-22} '{2}' ({1} bytes)", meta[0], meta[1], meta[2]);
int messageType = GetMetaMessageType();
string typeName = MidiHelper.GetMetaString(messageType);
byte[] messageData = GetMetaMessageData();
string hex = MidiHelper.ByteArrayToString(messageData, ",");
//return string.Format("{0} [{1}:{2}: {3}]", metaStrings, messageType, typeName, hex);
return(string.Format("{0}", metaStrings));
}
/// <summary>
/// Return the string representation of this object
/// </summary>
/// <returns>the string representation of this object</returns>
public override string ToString()
{
// Event, Note, Value, Patch, Text, Channel
object[] meta = this.GetShortStrings(false);
string metaStrings = string.Format("{0,-22} {1,-8} {2,-8} {3,-22} {4,-8} {5,-8}", meta[0], meta[1], meta[2], meta[3], meta[4], meta[5]);
int command = GetCommand();
string commandName = MidiHelper.GetEventTypeString((MidiHelper.MidiEventType)command);
int channel = GetChannel();
byte[] messageData = GetMessage();
string hex = MidiHelper.ByteArrayToString(messageData, ",");
//return string.Format("{0} [{1}:{2}: {3}]", metaStrings, command, commandName, hex);
return(string.Format("{0}", metaStrings));
}
/// <summary>
/// Return the string representation of this object
/// </summary>
/// <returns>the string representation of this object</returns>
public override string ToString()
{
string hex = MidiHelper.ByteArrayToString(data, ",");
return(string.Format("Sysex: [{0}]", hex));
}
/// <summary>Converts the MIDI sequence into a new one with the desired format.</summary>
/// <param name="sequence">The sequence to be converted.</param>
/// <param name="format">The format to which we want to convert the sequence.</param>
/// <param name="options">Options used when doing the conversion.</param>
/// <param name="newResolution">the new resolution (disable using 0 or -1)</param>
/// <returns>The new, converted sequence.</returns>
/// <remarks>This is based on the excellent MidiSharp package by Stephen Toub.</remarks>
public static Sequence Convert(this Sequence sequence, int format, FormatConversionOption options, int newResolution, string trackName)
{
if (sequence.MidiFileType == format)
{
// If the desired format is the same as the original, just return a copy.
// No transformation is necessary.
sequence = new Sequence(sequence);
}
else if (format != 0 || sequence.Tracks.Count == 1)
{
// If the desired format is is not 0 or there's only one track, just copy the sequence with a different format number.
// If it's not zero, then multiple tracks are acceptable, so no transformation is necessary.
// Or if there's only one track, then there's no possible transformation to be done.
var newSequence = new Sequence(sequence.DivisionType, sequence.Resolution, 0, format);
foreach (Track t in sequence.Tracks)
{
newSequence.Tracks.Add(new Track(t));
}
sequence = newSequence;
}
else
{
// Now the harder cases, converting to format 0. We need to combine all tracks into 1,
// as format 0 requires that there only be a single track with all of the events for the song.
int originalResolution = sequence.Resolution;
if (newResolution <= 0)
{
newResolution = originalResolution;
}
sequence = new Sequence(sequence);
sequence.MidiFileType = (int)MidiHelper.MidiFormat.SingleTrack;
// Add all events to new track (except for end of track markers and SequenceOrTrackName events)
int trackNumber = 0;
var newTrack = new Track();
foreach (Track track in sequence.Tracks)
{
foreach (MidiEvent midiEvent in track.Events)
{
bool doAddEvent = true;
var msg = midiEvent.Message;
// check if this is a meta message
var mm = msg as MetaMessage;
if (mm != null)
{
// we have a meta message
// add all meta messages except the end of track markers (we'll add our own)
int type = mm.GetMetaMessageType();
if (type == (int)MidiHelper.MetaEventType.EndOfTrack)
{
doAddEvent = false;
}
else if (type == (int)MidiHelper.MetaEventType.SequenceOrTrackName)
{
doAddEvent = false;
// store track name, will be used later
if (string.IsNullOrEmpty(trackName))
{
byte[] data = mm.GetMetaMessageData();
string text = MidiHelper.GetString(data);
trackName = MidiHelper.TextString(text);
}
}
}
// check if this is a short message
var sm = msg as ShortMessage;
if (sm != null)
{
// get the data
var channel = sm.GetChannel();
var cmd = sm.GetCommand();
var data1 = sm.GetData1();
var data2 = sm.GetData2();
// If this event has a channel, and if we're storing tracks as channels, copy to it
if ((options & FormatConversionOption.CopyTrackToChannel) > 0 &&
trackNumber >= MidiHelper.MIN_CHANNEL && trackNumber <= MidiHelper.MAX_CHANNEL)
{
if (sm.IsChannelMessage())
{
// store the track number as the channel
sm.SetMessage(cmd, trackNumber, data1, data2);
}
}
if ((options & FormatConversionOption.NoteOffZero2NoteOnZero) > 0)
{
// If the event is a NoteOff with Volume 0
if (cmd == (int)MidiHelper.MidiEventType.NoteOff && data2 == 0)
{
// convert to a NoteOn instead
sm.SetMessage((int)MidiHelper.MidiEventType.NoteOn, channel, data1, data2);
}
}
}
// convert ticks if resolution has changed
if (originalResolution != newResolution)
{
if (midiEvent.Tick != 0)
{
double fraction = (double)midiEvent.Tick / (double)originalResolution;
int tick = (int)(fraction * newResolution);
midiEvent.Tick = tick;
}
}
// Add all events, except for end of track markers (we'll add our own)
if (doAddEvent)
{
//newTrack.Events.Add(midiEvent); // add to end of list
newTrack.Add(midiEvent); // add in the right position based on the tick
}
}
trackNumber++;
}
if (originalResolution != newResolution)
{
sequence.Resolution = newResolution;
}
// Sort the events by total time
// newTrack.Events.Sort((x, y) => x.Tick.CompareTo(y.Tick));
// Note! using newTrack.Add instead of newTrack.Events.Add, already ensures a correct sort order
// Top things off with an end-of-track marker.
newTrack.Add(MetaEvent.CreateMetaEvent("EndOfTrack", "", newTrack.Ticks(), 0));
// add a new track name as the very first event
newTrack.Events.Insert(0, MetaEvent.CreateMetaEvent((int)MidiHelper.MetaEventType.SequenceOrTrackName, trackName, 0, 0));
// We now have all of the combined events in newTrack. Clear out the sequence, replacing all the tracks
// with this new one.
sequence.Tracks.Clear();
sequence.Tracks.Add(newTrack);
}
return(sequence);
}
/// <summary>
/// Creates C# code from a MIDI sequence.
/// </summary>
/// <param name="sequence">The sequence to be generated as C# code and saved.</param>
/// <param name="outputFilePath">path to text file to store generated code to</param>
public static void SaveGenerateMidiCode(this Sequence sequence, string outputFilePath)
{
// generate code
int trackno = 1;
using (var outfile = new StreamWriter(outputFilePath, false)) {
string midiTypeName = MidiHelper.GetMidiFormatString(sequence.MidiFileType);
DateTime now = DateTime.Now;
outfile.WriteLine("/*");
outfile.WriteLine("* Generated by GnuMidi");
outfile.WriteLine("* Author: [email protected]");
outfile.WriteLine("* Date: {0}", now.ToString("yyyy-MM-dd"));
outfile.WriteLine("* Time: {0}", now.ToString("HH:mm"));
outfile.WriteLine("*/");
outfile.WriteLine("using System;");
outfile.WriteLine("using System.IO;");
outfile.WriteLine("using gnu.sound.midi;");
outfile.WriteLine("using gnu.sound.midi.file;");
outfile.WriteLine("using gnu.sound.midi.info;");
outfile.WriteLine();
outfile.WriteLine("namespace MidiGeneration");
outfile.WriteLine("{");
outfile.WriteLine(" public static class GenerateMidi");
outfile.WriteLine(" {");
outfile.WriteLine(" public static void Main(string[] args)");
outfile.WriteLine(" {");
outfile.WriteLine(" // Generate Midi");
outfile.WriteLine(" var sequence = GenerateSequence();");
outfile.WriteLine(" sequence.DumpMidi(\"generated_dump.txt\");");
outfile.WriteLine(" new MidiFileWriter().Write(sequence, sequence.MidiFileType, new FileInfo(\"generated.mid\"));");
outfile.WriteLine(" }");
outfile.WriteLine();
outfile.WriteLine(" public static Sequence GenerateSequence() {");
outfile.WriteLine();
outfile.WriteLine(" // Generate midi file");
outfile.WriteLine(" var sequence = new Sequence({0}, {1}, 0, (int) MidiHelper.MidiFormat.{2});", sequence.DivisionType, sequence.Resolution, midiTypeName);
foreach (var track in sequence.Tracks)
{
outfile.WriteLine();
outfile.WriteLine(" var track{0} = sequence.CreateTrack();", trackno);
foreach (var ev in track.Events)
{
long tick = ev.Tick;
int beat = (int)tick / sequence.Resolution;
int tickRemainder = (int)tick % sequence.Resolution;
MidiMessage msg = ev.Message;
// check if this is a meta message
var mm = msg as MetaMessage;
if (mm != null)
{
string metaCodeString = mm.CreateMetaEventGeneratedCode(tick, sequence.Resolution);
outfile.WriteLine(" track{0}.Add({1});", trackno, metaCodeString);
}
// check if this is a short message
var sm = msg as ShortMessage;
if (sm != null)
{
string shortCodeString = sm.CreateShortEventGeneratedCode(true, tick);
outfile.WriteLine(" track{0}.Add({1}", trackno, shortCodeString);
}
// check if this is a sysex message
var ss = msg as SysexMessage;
if (ss != null)
{
var data = ss.GetMessage();
string sysexString = MidiHelper.ByteArrayToString(data, ",");
outfile.WriteLine(" track{0}.Add(SysexEvent.CreateSysexEvent(\"{1}\", {2}));", trackno, sysexString, tick);
}
}
trackno++;
}
outfile.WriteLine();
outfile.WriteLine(" return sequence;");
outfile.WriteLine(" }");
outfile.WriteLine(" }");
outfile.WriteLine("}");
}
}
