public static MidiFileAsset Load(byte [] data)
{
var reader = new MidiDataStreamReader(data);
// Chunk type
if (reader.ReadChars(4) != "MThd")
{
throw new FormatException("Can't find header chunk.");
}
// Chunk length
if (reader.ReadBEUInt32() != 6u)
{
throw new FormatException("Length of header chunk must be 6.");
}
// Format (unused)
reader.Advance(2);
// Number of tracks
var trackCount = reader.ReadBEUInt16();
// Ticks per quarter note
var tpqn = reader.ReadBEUInt16();
if ((tpqn & 0x8000u) != 0)
{
throw new FormatException("SMPTE time code is not supported.");
}
// Tracks
var tracks = new MidiAnimationAsset [trackCount];
for (var i = 0; i < trackCount; i++)
{
tracks[i] = ReadTrack(reader, tpqn);
}
// Asset instantiation
var asset = ScriptableObject.CreateInstance <MidiFileAsset>();
asset.tracks = tracks;
return(asset);
}
