void CommandReadTOC()
{
switch (CommandBuffer[1])
{
case 0: // return number of tracks
{
DataIn.Clear();
DataIn.Enqueue(0x01);
DataIn.Enqueue(((byte)disc.TOC.Sessions[0].Tracks.Count).BinToBCD());
SetPhase(BusPhase_DataIn);
break;
}
case 1: // return total disc length in minutes/seconds/frames
{
int totalLbaLength = disc.LBACount;
byte m, s, f;
Disc.ConvertLBAtoMSF(totalLbaLength, out m, out s, out f);
DataIn.Clear();
DataIn.Enqueue(m.BinToBCD());
DataIn.Enqueue(s.BinToBCD());
DataIn.Enqueue(f.BinToBCD());
SetPhase(BusPhase_DataIn);
break;
}
case 2: // Return starting position of specified track in MSF format
{
int track = CommandBuffer[2].BCDtoBin();
var tracks = disc.TOC.Sessions[0].Tracks;
if (CommandBuffer[2] > 0x99)
{
throw new Exception("invalid track number BCD request... is something I need to handle?");
}
if (track == 0)
{
track = 1;
}
track--;
int lbaPos;
if (track > tracks.Count)
{
lbaPos = disc.TOC.Sessions[0].length_aba - 150;
}
else
{
lbaPos = tracks[track].Indexes[1].aba - 150;
}
byte m, s, f;
Disc.ConvertLBAtoMSF(lbaPos, out m, out s, out f);
DataIn.Clear();
DataIn.Enqueue(m.BinToBCD());
DataIn.Enqueue(s.BinToBCD());
DataIn.Enqueue(f.BinToBCD());
if (track > tracks.Count || disc.TOC.Sessions[0].Tracks[track].TrackType == ETrackType.Audio)
{
DataIn.Enqueue(0);
}
else
{
DataIn.Enqueue(4);
}
SetPhase(BusPhase_DataIn);
break;
}
default:
Console.WriteLine("unimplemented READ TOC command argument!");
break;
}
}