public MidiMusic DemoPixelMidi()
{
MidiMusic result = new MidiMusic();
short noteLen = 0x03C0;
int offset = 4 * noteLen;
result.DeltaTimeSpec = noteLen;
result.Format = 1;
var track_sys = GetMetaTrack(FileName);
result.AddTrack(track_sys);
var track = new MidiTrack();
track.AddMessage(new MidiMessage(0, new MidiEvent(MidiEvent.Meta, 3, 0, Encoding.Default.GetBytes("Demo"))));
var delta = new int[128];
for (int x = 0; x < 128; x++)
{
var noteOn = new MidiEvent(MidiEvent.NoteOn, (byte)x, 0x64, Encoding.Default.GetBytes(""));
var noteOff = new MidiEvent(MidiEvent.NoteOn, (byte)x, 0x00, Encoding.Default.GetBytes(""));
track.AddMessage(new MidiMessage(0, noteOn));
track.AddMessage(new MidiMessage(offset, noteOff));
}
track.AddMessage(new MidiMessage(0, new MidiEvent(MidiEvent.Meta, 0x2F, 0, Encoding.Default.GetBytes(""))));
result.AddTrack(track);
return(result);
}
public MidiMusic GetHistogramMidi(Bitmap bitmap, bool singleTrack = true)
{
MidiMusic result = null;
if (bitmap is Bitmap)
{
var lastNoteCenter = NoteCenter;
NoteCenter = 63;
int delta = (int)(noteLen * NoteType);
result = new MidiMusic();
result.DeltaTimeSpec = noteLen;
result.Format = 1;
var track_sys = GetMetaTrack(FileName);
result.AddTrack(track_sys);
var histogram = GetHistogram(bitmap, true);
if (singleTrack)
{
var hist = MakeHistogram(histogram);
var track = GetPixelTrack(hist, $"{FileName}_Histogram", false, false);
if (track is MidiTrack)
{
result.AddTrack(track);
}
}
else
{
var hist_a = MakeHistogram(histogram.A, Color.White);
var hist_r = MakeHistogram(histogram.R, Color.Red);
var hist_g = MakeHistogram(histogram.G, Color.Green);
var hist_b = MakeHistogram(histogram.B, Color.Blue);
var track_a = GetPixelTrack(hist_a, $"{FileName}_Histogram_A", false, false);
var track_r = GetPixelTrack(hist_r, $"{FileName}_Histogram_R", false, false);
var track_g = GetPixelTrack(hist_g, $"{FileName}_Histogram_G", false, false);
var track_b = GetPixelTrack(hist_b, $"{FileName}_Histogram_B", false, false);
if (track_a is MidiTrack)
{
result.AddTrack(track_a);
}
if (track_r is MidiTrack)
{
result.AddTrack(track_r);
}
if (track_g is MidiTrack)
{
result.AddTrack(track_g);
}
if (track_b is MidiTrack)
{
result.AddTrack(track_b);
}
}
NoteCenter = lastNoteCenter;
Music = result;
}
return(result);
}
/// <summary>
///
/// -----------------------
/// Type Event
/// -----------------------
/// 0x00 Sequence number
/// 0x01 Text event
/// 0x02 Copyright notice
/// 0x03 Sequence or track name
/// 0x04 Instrument name
/// 0x05 Lyric text
/// 0x06 Marker text
/// 0x07 Cue point
/// 0x20 MIDI channel prefix assignment
/// 0x2F End of track
/// 0x51 Tempo setting
/// 0x54 SMPTE offset
/// 0x58 Time signature
/// 0x59 Key signature
/// 0x7F Sequencer specific event
/// -----------------------
///
///
/// </summary>
/// <param name="bitmap"></param>
/// <param name="singleTrack"></param>
/// <returns></returns>
public MidiMusic GetPixelMidi(Bitmap bitmap, bool singleTrack = true)
{
MidiMusic result = null;
if (bitmap is Bitmap)
{
int delta = (int)(noteLen * NoteType);
result = new MidiMusic();
result.DeltaTimeSpec = noteLen;
result.Format = 1;
var track_sys = GetMetaTrack(FileName);
result.AddTrack(track_sys);
if (singleTrack)
{
var track = GetPixelTrack(bitmap, FileName);
result.AddTrack(track);
}
else
{
var gray = GrayScale(bitmap.Height > 128 ? Resize(bitmap, 0, 128): bitmap);
if (InvertSource)
{
gray = Invert(gray);
}
Color c;
Color co = gray.GetPixel(0, 0);
int count = 0;
for (int y = 0; y < gray.Height; y++)
{
count = 0;
var track = new MidiTrack();
track.AddMessage(new MidiMessage(0, new MidiEvent(MidiEvent.Meta, 0x00, 0, Encoding.Default.GetBytes($"{y}"))));
track.AddMessage(new MidiMessage(0, new MidiEvent(MidiEvent.Meta, 0x03, 0, Encoding.Default.GetBytes($"{FileName}_{y}"))));
for (int x = 0; x < gray.Width; x++)
{
c = gray.GetPixel(x, y);
byte velocity = 0x40;
var alpha = CalcAlpha(c, co, out velocity);
if (alpha > 0)
{
var noteOn = new MidiEvent(MidiEvent.NoteOn, 0x40, velocity, Encoding.Default.GetBytes(""));
var noteOff = new MidiEvent(MidiEvent.NoteOn, 0x40, 0x00, Encoding.Default.GetBytes(""));
track.AddMessage(new MidiMessage(count * delta, noteOn));
track.AddMessage(new MidiMessage(delta, noteOff));
count = 0;
}
else
{
count++;
}
}
track.AddMessage(new MidiMessage(0, new MidiEvent(MidiEvent.Meta, 0x2F, 0, Encoding.Default.GetBytes(""))));
result.AddTrack(track);
}
}
}
Music = result;
return(result);
}
