private static SMFHeader readHeader(BinaryReader reader)
{
SMFHeader header = new SMFHeader();
char[] chunkIDChars = reader.ReadChars(4);
string chunkID = new string(chunkIDChars);
if (chunkID != "MThd")
{
throw new SMFException("invalid chunkID");
}
uint dataSize = readBENumeric(reader, 4);
header.FormatType = readBENumeric(reader, 2);
header.TrackNum = readBENumeric(reader, 2);
header.DeltaTime = readBENumeric(reader, 2);
header.DeltaTimeInPPQN = false;
if ((header.DeltaTime & 0x8000) == 0) // MSBが立っていない
{
header.DeltaTimeInPPQN = true;
header.DeltaTime = header.DeltaTime & 0x7fff;
}
else
{
header.DeltaTime = (header.DeltaTime & 0x7f00) * (header.DeltaTime & 0x00ff);
}
if (dataSize > 6)
{
reader.ReadBytes((int)(dataSize - 6));
}
return(header);
}
public override void Load(string filePath)
{
List <List <TrackEvent> > trackEvents = new List <List <TrackEvent> >();
BinaryReader reader = new BinaryReader(new FileStream(filePath, FileMode.Open), Encoding.UTF8);
_header = readHeader(reader);
if (!_header.DeltaTimeInPPQN)
{
throw new SMFException("対応していないMIDIファイル:TimeInSec Division");
}
if (_header.FormatType == 2)
{
throw new SMFException("対応していないMIDIファイル:Format");
}
for (int i = 0; i < _header.TrackNum; i++)
{
List <TrackEvent> evs = new List <TrackEvent>();
readTrack(reader, ref evs);
trackEvents.Add(evs);
}
double maxPitch = double.MinValue;
double minPitch = double.MaxValue;
long prevTick = 0;
double time = 0;
int tempo = 500000;
double ppqnInv = 1 / (double)_header.DeltaTime;
Dictionary <int, Dictionary <int, SMFNote> > channels = new Dictionary <int, Dictionary <int, SMFNote> >();
_points = new List <MusicNote>();
while (true)
{
if (trackEvents.Count == 0)
{
break;
}
if (trackEvents.TrueForAll((lst) => { return(lst.Count == 0); }))
{
break;
}
int idx = -1; long minTick = long.MaxValue;
for (int i = 0; i < trackEvents.Count; i++)
{
if (trackEvents[i].Count == 0)
{
continue;
}
long tick = trackEvents[i][0].AbsoluteTick;
if (tick < minTick)
{
idx = i; minTick = tick;
}
}
if (idx < 0)
{
break;
}
TrackEvent fstev = trackEvents[idx][0];
trackEvents[idx].RemoveAt(0);
time += (fstev.AbsoluteTick - prevTick) * tempo * ppqnInv / 1000000.0;
switch (fstev.EventType)
{
case EventType.Tempo:
tempo = (int)fstev.Params[0];
break;
case EventType.NoteOn:
{
int channel = (int)fstev.Params[0];
int noteNum = (int)fstev.Params[1];
Dictionary <int, SMFNote> noteNums;
if (channels.ContainsKey(channel))
{
noteNums = channels[channel];
}
else
{
noteNums = new Dictionary <int, SMFNote>();
channels.Add(channel, noteNums);
}
SMFNote note;
if (noteNums.ContainsKey(noteNum))
{
note = noteNums[noteNum];
MusicNote n = new MusicNote();
n.TimeInSec = time;
n.Pitch = note.Pitch;
n.Start = false;
_points.Add(n);
}
note = new SMFNote(true, pitchFromNote(noteNum));
if (noteNums.ContainsKey(noteNum))
{
noteNums[noteNum] = note;
}
else
{
noteNums.Add(noteNum, note);
}
MusicNote nn = new MusicNote();
nn.TimeInSec = time;
nn.Pitch = note.Pitch;
nn.Start = true;
_points.Add(nn);
if (note.Pitch < minPitch)
{
minPitch = note.Pitch;
}
if (note.Pitch > maxPitch)
{
maxPitch = note.Pitch;
}
}
break;
case EventType.NoteOff:
{
int channel = (int)fstev.Params[0];
int noteNum = (int)fstev.Params[1];
Dictionary <int, SMFNote> noteNums;
if (channels.ContainsKey(channel))
{
noteNums = channels[channel];
}
else
{
noteNums = new Dictionary <int, SMFNote>();
channels.Add(channel, noteNums);
}
SMFNote note;
if (noteNums.ContainsKey(noteNum))
{
note = noteNums[noteNum];
MusicNote n = new MusicNote();
n.TimeInSec = time;
n.Pitch = note.Pitch;
n.Start = false;
_points.Add(n);
if (note.Pitch < minPitch)
{
minPitch = note.Pitch;
}
if (note.Pitch > maxPitch)
{
maxPitch = note.Pitch;
}
noteNums.Remove(noteNum);
}
}
break;
}
prevTick = fstev.AbsoluteTick;
}
_length = time;
ToneResult minTone = ToneAnalyzer.Analyze(minPitch, 1.0);
ToneResult maxTone = ToneAnalyzer.Analyze(maxPitch, 1.0);
maxTone.ToneIdx++;
if (maxTone.ToneIdx >= 12)
{
maxTone.ToneIdx -= 12; maxTone.Octave++;
}
minTone.ToneIdx--;
if (minTone.ToneIdx <= 0)
{
minTone.ToneIdx += 12; minTone.Octave--;
}
MinPitch = ToneAnalyzer.PitchFromTone(minTone.ToneIdx, minTone.Octave);
MaxPitch = ToneAnalyzer.PitchFromTone(maxTone.ToneIdx, maxTone.Octave);
_points.Sort((MusicNote n1, MusicNote n2) =>
{
if (n1.TimeInSec != n2.TimeInSec)
{
return(n1.TimeInSec.CompareTo(n2.TimeInSec));
}
if (n1.Start)
{
if (n2.Start)
{
return(0);
}
return(1);
}
else
{
if (n2.Start)
{
return(-1);
}
return(0);
}
});
}
public override void Load(string filePath)
{
List<List<TrackEvent>> trackEvents = new List<List<TrackEvent>>();
BinaryReader reader = new BinaryReader(new FileStream(filePath, FileMode.Open), Encoding.UTF8);
_header = readHeader(reader);
if (!_header.DeltaTimeInPPQN) throw new SMFException("対応していないMIDIファイル:TimeInSec Division");
if (_header.FormatType == 2) throw new SMFException("対応していないMIDIファイル:Format");
for (int i = 0; i < _header.TrackNum; i++)
{
List<TrackEvent> evs = new List<TrackEvent>();
readTrack(reader, ref evs);
trackEvents.Add(evs);
}
double maxPitch = double.MinValue;
double minPitch = double.MaxValue;
long prevTick = 0;
double time = 0;
int tempo = 500000;
double ppqnInv = 1 / (double)_header.DeltaTime;
Dictionary<int, Dictionary<int, SMFNote>> channels = new Dictionary<int, Dictionary<int, SMFNote>>();
_points = new List<MusicNote>();
while (true)
{
if (trackEvents.Count == 0) break;
if (trackEvents.TrueForAll((lst) => { return lst.Count == 0; })) break;
int idx = -1; long minTick = long.MaxValue;
for (int i = 0; i < trackEvents.Count; i++)
{
if (trackEvents[i].Count == 0) continue;
long tick = trackEvents[i][0].AbsoluteTick;
if (tick < minTick) { idx = i; minTick = tick; }
}
if (idx < 0) break;
TrackEvent fstev = trackEvents[idx][0];
trackEvents[idx].RemoveAt(0);
time += (fstev.AbsoluteTick - prevTick) * tempo * ppqnInv / 1000000.0;
switch (fstev.EventType)
{
case EventType.Tempo:
tempo = (int)fstev.Params[0];
break;
case EventType.NoteOn:
{
int channel = (int)fstev.Params[0];
int noteNum = (int)fstev.Params[1];
Dictionary<int, SMFNote> noteNums;
if (channels.ContainsKey(channel))
{
noteNums = channels[channel];
}
else
{
noteNums = new Dictionary<int, SMFNote>();
channels.Add(channel, noteNums);
}
SMFNote note;
if (noteNums.ContainsKey(noteNum))
{
note = noteNums[noteNum];
MusicNote n = new MusicNote();
n.TimeInSec = time;
n.Pitch = note.Pitch;
n.Start = false;
_points.Add(n);
}
note = new SMFNote(true, pitchFromNote(noteNum));
if (noteNums.ContainsKey(noteNum))
noteNums[noteNum] = note;
else
noteNums.Add(noteNum, note);
MusicNote nn = new MusicNote();
nn.TimeInSec = time;
nn.Pitch = note.Pitch;
nn.Start = true;
_points.Add(nn);
if (note.Pitch < minPitch) minPitch = note.Pitch;
if (note.Pitch > maxPitch) maxPitch = note.Pitch;
}
break;
case EventType.NoteOff:
{
int channel = (int)fstev.Params[0];
int noteNum = (int)fstev.Params[1];
Dictionary<int, SMFNote> noteNums;
if (channels.ContainsKey(channel))
{
noteNums = channels[channel];
}
else
{
noteNums = new Dictionary<int, SMFNote>();
channels.Add(channel, noteNums);
}
SMFNote note;
if (noteNums.ContainsKey(noteNum))
{
note = noteNums[noteNum];
MusicNote n = new MusicNote();
n.TimeInSec = time;
n.Pitch = note.Pitch;
n.Start = false;
_points.Add(n);
if (note.Pitch < minPitch) minPitch = note.Pitch;
if (note.Pitch > maxPitch) maxPitch = note.Pitch;
noteNums.Remove(noteNum);
}
}
break;
}
prevTick = fstev.AbsoluteTick;
}
_length = time;
ToneResult minTone = ToneAnalyzer.Analyze(minPitch, 1.0);
ToneResult maxTone = ToneAnalyzer.Analyze(maxPitch, 1.0);
maxTone.ToneIdx++;
if (maxTone.ToneIdx >= 12) { maxTone.ToneIdx -= 12; maxTone.Octave++; }
minTone.ToneIdx--;
if (minTone.ToneIdx <= 0) { minTone.ToneIdx += 12; minTone.Octave--; }
MinPitch = ToneAnalyzer.PitchFromTone(minTone.ToneIdx, minTone.Octave);
MaxPitch = ToneAnalyzer.PitchFromTone(maxTone.ToneIdx, maxTone.Octave);
_points.Sort((MusicNote n1, MusicNote n2) =>
{
if (n1.TimeInSec != n2.TimeInSec) return n1.TimeInSec.CompareTo(n2.TimeInSec);
if (n1.Start)
{
if (n2.Start) return 0;
return 1;
}
else
{
if (n2.Start) return -1;
return 0;
}
});
}
private static SMFHeader readHeader(BinaryReader reader)
{
SMFHeader header = new SMFHeader();
char[] chunkIDChars = reader.ReadChars(4);
string chunkID = new string(chunkIDChars);
if (chunkID != "MThd")
{
throw new SMFException("invalid chunkID");
}
uint dataSize = readBENumeric(reader, 4);
header.FormatType = readBENumeric(reader, 2);
header.TrackNum = readBENumeric(reader, 2);
header.DeltaTime = readBENumeric(reader, 2);
header.DeltaTimeInPPQN = false;
if ((header.DeltaTime & 0x8000) == 0) // MSBが立っていない
{
header.DeltaTimeInPPQN = true;
header.DeltaTime = header.DeltaTime & 0x7fff;
}
else
{
header.DeltaTime = (header.DeltaTime & 0x7f00) * (header.DeltaTime & 0x00ff);
}
if (dataSize > 6) reader.ReadBytes((int)(dataSize - 6));
return header;
}
