void CommandReadTOC()
{
switch (CommandBuffer[1])
{
case 0: // return number of tracks
{
DataIn.Clear();
DataIn.Enqueue(0x01);
DataIn.Enqueue(((byte)disc.Session1.Tracks.Count).BinToBCD());
SetPhase(BusPhase_DataIn);
break;
}
case 1: // return total disc length in minutes/seconds/frames
{
//zero 07-jul-2015 - I may have broken this
int totalLbaLength = disc.Session1.LeadoutLBA;
byte m, s, f;
DiscUtils.Convert_LBA_To_AMSF(totalLbaLength + 150, 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. TODO - did zero adapt this right? track indexing might be off
{
int track = CommandBuffer[2].BCDtoBin();
var tracks = disc.Session1.Tracks;
if (CommandBuffer[2] > 0x99)
{
throw new Exception("invalid track number BCD request... is something I need to handle?");
}
if (track == 0)
{
track = 1;
}
int lbaPos;
if (track > disc.Session1.InformationTrackCount)
{
lbaPos = disc.Session1.LeadoutLBA; //zero 03-jul-2015 - did I adapt this right?
}
else
{
lbaPos = tracks[track].LBA;
}
byte m, s, f;
DiscUtils.Convert_LBA_To_AMSF(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.Session1.Tracks[track].IsAudio)
{
DataIn.Enqueue(0);
}
else
{
DataIn.Enqueue(4);
}
SetPhase(BusPhase_DataIn);
break;
}
default:
Console.WriteLine("unimplemented READ TOC command argument!");
break;
}
}