public byte[] ToMIDI()
{
RIFF riff = new RIFF("MIDI");
byte[] mthd = new byte[6];
BEBitConv.ToInt16(mthd, 0, 0);
BEBitConv.ToInt16(mthd, 2, 1);
BEBitConv.ToInt16(mthd, 4, Resolution);
riff.Items.Add(new RIFFData("MThd", mthd));
byte[] mtrk = new byte[15 + Data.Length];
mtrk[0] = 0;
mtrk[1] = 0xFF;
mtrk[2] = 0x51;
mtrk[3] = 0x03;
MIDIConv.To3BE(mtrk, 4, Tempo);
mtrk[7] = 0;
mtrk[8] = 0xFF;
mtrk[9] = 0x58;
mtrk[10] = 0x04;
BEBitConv.ToInt16(mtrk, 11, Rhythm);
mtrk[13] = 0x18;
mtrk[14] = 0x08;
Data.CopyTo(mtrk, 15);
riff.Items.Add(new RIFFData("MTrk", mtrk));
return(riff.SaveBody(Endianness.BigEndian));
}
public static SEQ Load(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
// All SEP/SEQ stuff is big-endian, like MIDI
if (data.Length < 15)
{
MessageBox.Show("SEQ: Data is too short");
}
int magic = BEBitConv.FromInt32(data, 0);
int version = BEBitConv.FromInt32(data, 4);
if (magic != Magic)
{
MessageBox.Show("SEQ: Magic number is wrong");
}
if (version != Version)
{
MessageBox.Show("SEQ: Version number is wrong");
}
short resolution = BEBitConv.FromInt16(data, 8);
int tempo = MIDIConv.From3BE(data, 10);
short rhythm = BEBitConv.FromInt16(data, 13);
byte[] scoredata = new byte[data.Length - 15];
Array.Copy(data, 15, scoredata, 0, scoredata.Length);
return(new SEQ(resolution, tempo, rhythm, scoredata));
}
public byte[] Save()
{
byte[] result = new byte[15 + Data.Length];
BEBitConv.ToInt32(result, 0, Magic);
BEBitConv.ToInt32(result, 4, Version);
BEBitConv.ToInt16(result, 8, Resolution);
MIDIConv.To3BE(result, 10, Tempo);
BEBitConv.ToInt16(result, 13, Rhythm);
Data.CopyTo(result, 15);
return(result);
}
public static SEQ FromMIDI(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Length < 15)
{
MessageBox.Show("MIDI: Data is too short");
}
short resolution = BEBitConv.FromInt16(data, 12);
int tempo = MIDIConv.From3BE(data, 26);
short rhythm = BEBitConv.FromInt16(data, 33);
byte[] scoredata = new byte[data.Length - 37];
Array.Copy(data, 37, scoredata, 0, scoredata.Length);
return(new SEQ(resolution, tempo, rhythm, scoredata));
}
