public MusicTrack(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Length < 16)
{
throw new ApplicationException();
}
int magic = BitConv.FromInt32(data, 0);
int scorelength = (ushort)BitConv.FromInt16(data, 4);
int scorestart = (ushort)BitConv.FromInt16(data, 6);
int channels = (ushort)BitConv.FromInt16(data, 8);
int secchannels = (ushort)BitConv.FromInt16(data, 10);
int instrumentcount = (ushort)BitConv.FromInt16(data, 12);
int unused = (ushort)BitConv.FromInt16(data, 14);
if (magic != Magic)
{
throw new ApplicationException();
}
if (scorestart < 16)
{
throw new ApplicationException();
}
if (scorelength <= 0)
{
throw new ApplicationException();
}
if (scorestart + scorelength != data.Length)
{
throw new ApplicationException();
}
if (scorestart < 16 + instrumentcount * 2)
{
throw new ApplicationException();
}
instruments = new short [instrumentcount];
for (int i = 0; i < instrumentcount; i++)
{
instruments[i] = BitConv.FromInt16(data, 16 + i * 2);
}
score = new List <MusicEvent>();
int offset = scorestart;
while (offset != data.Length)
{
score.Add(MusicEvent.Parse(data, ref offset));
}
}
public void Update(double time)
{
duration -= time;
while (track != null && duration <= 0)
{
MusicEvent musicevent = track.Score[position++];
musicevent.Play(system);
duration += musicevent.Delay / 140.0;
if (musicevent.IsEndEvent || position >= track.Score.Count)
{
if (looping)
{
position = 0;
}
else
{
Stop();
}
}
}
}