public static CDSessionInfo?Decode(byte[] CDSessionInfoResponse)
{
if (CDSessionInfoResponse == null ||
CDSessionInfoResponse.Length <= 4)
{
return(null);
}
var decoded = new CDSessionInfo
{
DataLength = BigEndianBitConverter.ToUInt16(CDSessionInfoResponse, 0),
FirstCompleteSession = CDSessionInfoResponse[2],
LastCompleteSession = CDSessionInfoResponse[3]
};
decoded.TrackDescriptors = new TrackDataDescriptor[(decoded.DataLength - 2) / 8];
if (decoded.DataLength + 2 != CDSessionInfoResponse.Length)
{
AaruConsole.DebugWriteLine("CD Session Info decoder",
"Expected CDSessionInfo size ({0} bytes) is not received size ({1} bytes), not decoding",
decoded.DataLength + 2, CDSessionInfoResponse.Length);
return(null);
}
for (int i = 0; i < (decoded.DataLength - 2) / 8; i++)
{
decoded.TrackDescriptors[i].Reserved1 = CDSessionInfoResponse[0 + (i * 8) + 4];
decoded.TrackDescriptors[i].ADR = (byte)((CDSessionInfoResponse[1 + (i * 8) + 4] & 0xF0) >> 4);
decoded.TrackDescriptors[i].CONTROL = (byte)(CDSessionInfoResponse[1 + (i * 8) + 4] & 0x0F);
decoded.TrackDescriptors[i].TrackNumber = CDSessionInfoResponse[2 + (i * 8) + 4];
decoded.TrackDescriptors[i].Reserved2 = CDSessionInfoResponse[3 + (i * 8) + 4];
decoded.TrackDescriptors[i].TrackStartAddress =
BigEndianBitConverter.ToUInt32(CDSessionInfoResponse, 4 + (i * 8) + 4);
}
return(decoded);
}
public static string Prettify(CDSessionInfo?CDSessionInfoResponse)
{
if (CDSessionInfoResponse == null)
{
return(null);
}
CDSessionInfo response = CDSessionInfoResponse.Value;
StringBuilder sb = new StringBuilder();
sb.AppendFormat("First complete session number: {0}", response.FirstCompleteSession).AppendLine();
sb.AppendFormat("Last complete session number: {0}", response.LastCompleteSession).AppendLine();
foreach (TrackDataDescriptor descriptor in response.TrackDescriptors)
{
sb.AppendFormat("First track number in last complete session: {0}", descriptor.TrackNumber)
.AppendLine();
sb.AppendFormat("Track starts at LBA {0}, or MSF {1:X2}:{2:X2}:{3:X2}", descriptor.TrackStartAddress,
(descriptor.TrackStartAddress & 0x0000FF00) >> 8,
(descriptor.TrackStartAddress & 0x00FF0000) >> 16,
(descriptor.TrackStartAddress & 0xFF000000) >> 24).AppendLine();
switch ((TocAdr)descriptor.ADR)
{
case TocAdr.NoInformation:
sb.AppendLine("Q subchannel mode not given");
break;
case TocAdr.CurrentPosition:
sb.AppendLine("Q subchannel stores current position");
break;
case TocAdr.ISRC:
sb.AppendLine("Q subchannel stores ISRC");
break;
case TocAdr.MediaCatalogNumber:
sb.AppendLine("Q subchannel stores media catalog number");
break;
}
if ((descriptor.CONTROL & (byte)TocControl.ReservedMask) == (byte)TocControl.ReservedMask)
{
sb.AppendFormat("Reserved flags 0x{0:X2} set", descriptor.CONTROL).AppendLine();
}
else
{
switch ((TocControl)(descriptor.CONTROL & 0x0D))
{
case TocControl.TwoChanNoPreEmph:
sb.AppendLine("Stereo audio track with no pre-emphasis");
break;
case TocControl.TwoChanPreEmph:
sb.AppendLine("Stereo audio track with 50/15 μs pre-emphasis");
break;
case TocControl.FourChanNoPreEmph:
sb.AppendLine("Quadraphonic audio track with no pre-emphasis");
break;
case TocControl.FourChanPreEmph:
sb.AppendLine("Stereo audio track with 50/15 μs pre-emphasis");
break;
case TocControl.DataTrack:
sb.AppendLine("Data track, recorded uninterrupted");
break;
case TocControl.DataTrackIncremental:
sb.AppendLine("Data track, recorded incrementally");
break;
}
sb.AppendLine((descriptor.CONTROL & (byte)TocControl.CopyPermissionMask) ==
(byte)TocControl.CopyPermissionMask
? "Digital copy of track is permitted"
: "Digital copy of track is prohibited");
#if DEBUG
if (descriptor.Reserved1 != 0)
{
sb.AppendFormat("Reserved1 = 0x{0:X2}", descriptor.Reserved1).AppendLine();
}
if (descriptor.Reserved2 != 0)
{
sb.AppendFormat("Reserved2 = 0x{0:X2}", descriptor.Reserved2).AppendLine();
}
#endif
sb.AppendLine();
}
}
return(sb.ToString());
}
