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 static short FromInt16(Endianness endianness, byte[] str, int offset)
{
switch (endianness)
{
case Endianness.LittleEndian:
return(BitConv.FromInt16(str, offset));
case Endianness.BigEndian:
return(BEBitConv.FromInt16(str, offset));
default:
throw new ArgumentException("Endianness is invalid.");
}
}
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));
}
