private void writeString(String str)
{
baos.Write(str.ToByteArray());
baos.Write(new byte[] { 0 }); //NULL
}
public static byte[] Compress(ByteArrayStream target)
{
var commands = new List <byte>();
var data = new List <byte>();
var copyData = 0;
while (!target.AtEnd)
{
var term = target.GetBytes(0x11);
var copyOutput = 0;
var copyOffset = -1;
while (term.Length >= 3)
{
var(found, address) = target.FindLastInWindow(term, target.Address - 256, target.Address + term.Length - 1);
if (found)
{
copyOutput = term.Length - 2;
copyOffset = target.Address - address - 1;
break;
}
term = target.GetBytes(term.Length - 1);
}
if (copyOutput == 0)
{
if (copyData == 0xf)
{
commands.Add((byte)copyData);
copyData = 1;
}
else
{
copyData++;
}
data.Add(target.Byte());
}
else
{
commands.Add((byte)((copyOutput << 4) + copyData));
commands.Add((byte)copyOffset);
copyData = 0;
target.Address += term.Length;
}
}
// Add last copy data command
if (copyData != 0)
{
commands.Add((byte)copyData);
}
// Add terminating command
commands.Add(0);
var output = new ByteArrayStream(commands.Count + data.Count + 2);
var dataOffset = commands.Count;
if (dataOffset > 0xffff)
{
throw new Exception($"{nameof(dataOffset)} cannot be larger than 0xffff. {nameof(commands)} is too large");
}
output.Word((ushort)dataOffset);
output.Write(commands);
output.Write(data);
return(output.Buffer);
}
public bool Save(string filename, PlayerData playerData)
{
ByteArrayStream stream = new ByteArrayStream();
stream.WriteString("PTFF", 4);
byte version = playerData.Version;
stream.WriteByte(version);
stream.WriteByte(0); // ??
stream.WriteUShort(playerData.TickPerMinute);
stream.WriteFloat(playerData.Tempo);
UInt16 trackCount = playerData.Tracks.Count;
stream.WriteUShort(trackCount);
stream.writeUInt(playerData.HeaderEndTick);
stream.WriteFloat(playerData.TrackDuration);
ushort insCount = (ushort)(playerData.Instruments.Count - 1);
stream.WriteUShort(insCount);
for (int i = 0, l = playerData.Instruments.Count; i < l; i++)
{
InstrumentData ins = playerData.Instruments[i];
if (ins != null && ins.InsNum != 0)
{
if (version == 1)
{
stream.WriteUShort(ins.InsNum);
stream.WriteUShort(0);
}
else
{
stream.WriteByte((byte)ins.InsNum);
stream.WriteByte(0);
}
stream.WriteString(ins.Name, 0x40);
}
}
int eventSize = version == 1 ? 0x10 : 0x0B;
foreach (TrackData track in playerData.Tracks)
{
stream.writeUInt(EZTR);
int eventsCount = track.Events.Count();
int endTick = 0;
if (eventsCount > 0)
{
endTick = track.Events.Max(evnt => evnt.Tick);
}
uint blockSize = (uint)(eventsCount * eventSize);
stream.WriteString("", 0x02); // unknown
stream.WriteString(track.TrackName, 0x40);
stream.writeInt(endTick);
stream.writeUInt(blockSize);
if (version == 1)
{
stream.WriteUShort(0); // Unknown
}
foreach (EventData evnt in track.Events)
{
stream.writeInt(evnt.Tick);
stream.WriteByte((byte)evnt.EventType);
switch (evnt.EventType)
{
case EventType.Volume:
{
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
}
stream.WriteByte(evnt.Volume);
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
}
}
break;
case EventType.Note:
{
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
}
ushort insno = 0;
if (evnt.Instrument != null)
{
insno = evnt.Instrument.InsNum;
}
if (version == 1)
{
stream.WriteUShort(insno);
}
else
{
stream.WriteByte((byte)insno);
}
stream.WriteByte(evnt.Vel);
stream.WriteByte(evnt.Pan);
stream.WriteByte(evnt.Attribute);
stream.WriteUShort(evnt.Duration);
if (version == 1)
{
stream.WriteByte(0);
}
}
break;
case EventType.Tempo:
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
}
stream.Write(BitConverter.GetBytes(evnt.Tempo));
stream.WriteByte(0);
stream.WriteByte(0);
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
}
break;
case EventType.Beat:
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
}
stream.WriteUShort(evnt.Beat);
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
stream.WriteByte(0);
if (version == 1)
{
stream.WriteByte(0);
stream.WriteByte(0);
}
break;
default:
{
}
break;
}
}
}
byte[] ptffData = stream.GetData();
int sizeIn = ptffData.Count();
if (m_settingsDialog.EncryptFile /*playerData.Encrypted*/)
{
ptffData = EncryptDataOnline(ptffData);
if (ptffData == null || sizeIn != ptffData.Count())
{
return(false);
}
}
File.WriteAllBytes(filename, ptffData);
return(true);
}
