public static short[] ConvertToWav(Data.Buffer data, int level = 0, bool invert = false)
{
List <short> wavData = new List <short>();
while (data.Readable())
{
int value = data.Pop <byte>();
value = value + level;
if (invert)
{
value = 0xFF - value;
}
value *= 0xFF;
wavData.Add((short)value);
}
return(wavData.ToArray());
}
public XMI(Data.Buffer data)
{
// Note: Chunk length and so on are encoded as big endian.
// But as we don't use them we use little endian because
// the XMI data is encoded in little endian.
data.SetEndianess(Endian.Endianess.Little);
// Form chunk
if (data.ToString(4) != "FORM")
{
return;
}
data.Pop(4); // FORM
data.Pop <uint>(); // FORM chunk length
// format XDIR
if (data.ToString(4) != "XDIR")
{
return;
}
data.Pop(4); // XDIR
if (data.ToString(4) != "INFO")
{
return;
}
data.Pop(4); // INFO
data.Pop <uint>(); // INFO chunk length
int numTracks = data.Pop <ushort>();
if (numTracks != 1)
{
return; // we only support one track per file
}
if (data.ToString(4) != "CAT ")
{
return;
}
data.Pop(4); // CAT_
data.Pop <uint>(); // CAT chunk length
// format XMID
if (data.ToString(4) != "XMID")
{
return;
}
data.Pop(4); // XMID
// load the one track
// Form chunk
if (data.ToString(4) != "FORM")
{
return;
}
data.Pop(4); // FORM
data.Pop <uint>(); // FORM chunk length
// format XMID
if (data.ToString(4) != "XMID")
{
return;
}
data.Pop(4); // XMID
// TIMB chunk
if (data.ToString(4) != "TIMB")
{
return;
}
data.Pop(4); // TIMB
data.Pop <uint>(); // TIMB chunk length
int count = data.Pop <ushort>();
for (int j = 0; j < count; ++j)
{
// we don't need the TIMB information, just skip it
data.Pop(2);
}
// EVNT chunk
if (data.ToString(4) != "EVNT")
{
return;
}
data.Pop(4); // EVNT
data.Pop <uint>(); // EVNT chunk length
// read xmi/midi events
while (data.Readable())
{
ParseEvent(data);
}
var eventIndices = new Dictionary <Event, int>();
for (int i = 0; i < events.Count; ++i)
{
eventIndices.Add(events[i], i);
}
events.Sort((a, b) =>
{
int result = a.StartTime.CompareTo(b.StartTime);
if (result == 0)
{
return(eventIndices[a].CompareTo(eventIndices[b]));
}
return(result);
});
}