public static CDText?Decode(byte[] CDTextResponse)
{
if (CDTextResponse == null ||
CDTextResponse.Length <= 4)
{
return(null);
}
var decoded = new CDText
{
DataLength = BigEndianBitConverter.ToUInt16(CDTextResponse, 0),
Reserved1 = CDTextResponse[2],
Reserved2 = CDTextResponse[3]
};
decoded.DataPacks = new CDTextPack[(decoded.DataLength - 2) / 18];
if (decoded.DataLength == 2)
{
return(null);
}
if (decoded.DataLength + 2 != CDTextResponse.Length)
{
AaruConsole.DebugWriteLine("CD-TEXT decoder",
"Expected CD-TEXT size ({0} bytes) is not received size ({1} bytes), not decoding",
decoded.DataLength + 2, CDTextResponse.Length);
return(null);
}
for (int i = 0; i < (decoded.DataLength - 2) / 18; i++)
{
decoded.DataPacks[i].HeaderID1 = CDTextResponse[0 + (i * 18) + 4];
decoded.DataPacks[i].HeaderID2 = CDTextResponse[1 + (i * 18) + 4];
decoded.DataPacks[i].HeaderID3 = CDTextResponse[2 + (i * 18) + 4];
decoded.DataPacks[i].DBCC = Convert.ToBoolean(CDTextResponse[3 + (i * 18) + 4] & 0x80);
decoded.DataPacks[i].BlockNumber = (byte)((CDTextResponse[3 + (i * 18) + 4] & 0x70) >> 4);
decoded.DataPacks[i].CharacterPosition = (byte)(CDTextResponse[3 + (i * 18) + 4] & 0x0F);
decoded.DataPacks[i].TextDataField = new byte[12];
Array.Copy(CDTextResponse, 4 + (i * 18) + 4, decoded.DataPacks[i].TextDataField, 0, 12);
decoded.DataPacks[i].CRC = BigEndianBitConverter.ToUInt16(CDTextResponse, 16 + (i * 18) + 4);
}
return(decoded);
}
public static string Prettify(CDText?CDTextResponse)
{
if (CDTextResponse == null)
{
return(null);
}
CDText response = CDTextResponse.Value;
StringBuilder sb = new StringBuilder();
#if DEBUG
if (response.Reserved1 != 0)
{
sb.AppendFormat("Reserved1 = 0x{0:X2}", response.Reserved1).AppendLine();
}
if (response.Reserved2 != 0)
{
sb.AppendFormat("Reserved2 = 0x{0:X2}", response.Reserved2).AppendLine();
}
#endif
foreach (CDTextPack descriptor in response.DataPacks)
{
if ((descriptor.HeaderID1 & 0x80) != 0x80)
{
// Ignore NOPs
if ((descriptor.HeaderID1 & 0x80) != 0)
{
sb.AppendFormat("Incorrect CD-Text pack type {0}, not decoding", descriptor.HeaderID1)
.AppendLine();
}
}
else
{
switch (descriptor.HeaderID1)
{
case 0x80:
{
sb.Append("CD-Text pack contains title for ");
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("album");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x81:
{
sb.Append("CD-Text pack contains performer for ");
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("album");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x82:
{
sb.Append("CD-Text pack contains songwriter for ");
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("album");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x83:
{
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("album");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x84:
{
sb.Append("CD-Text pack contains arranger for ");
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("album");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x85:
{
sb.Append("CD-Text pack contains content provider's message for ");
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("album");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x86:
{
sb.AppendLine("CD-Text pack contains disc identification information");
break;
}
case 0x87:
{
sb.AppendLine("CD-Text pack contains genre identification information");
break;
}
case 0x88:
{
sb.AppendLine("CD-Text pack contains table of contents information");
break;
}
case 0x89:
{
sb.AppendLine("CD-Text pack contains second table of contents information");
break;
}
case 0x8A:
case 0x8B:
case 0x8C:
{
sb.AppendLine("CD-Text pack contains reserved data");
break;
}
case 0x8D:
{
sb.AppendLine("CD-Text pack contains data reserved for content provider only");
break;
}
case 0x8E:
{
if (descriptor.HeaderID2 == 0x00)
{
sb.AppendLine("CD-Text pack contains UPC");
}
else
{
sb.AppendFormat("track {0}", descriptor.HeaderID2).AppendLine();
}
break;
}
case 0x8F:
{
sb.AppendLine("CD-Text pack contains size block information");
break;
}
}
switch (descriptor.HeaderID1)
{
case 0x80:
case 0x81:
case 0x82:
case 0x83:
case 0x84:
case 0x85:
case 0x86:
case 0x87:
case 0x8E:
{
if (descriptor.DBCC)
{
sb.AppendLine("Double Byte Character Code is used");
}
sb.AppendFormat("Block number {0}", descriptor.BlockNumber).AppendLine();
sb.AppendFormat("Character position {0}", descriptor.CharacterPosition).AppendLine();
sb.AppendFormat("Text field: \"{0}\"",
StringHandlers.CToString(descriptor.TextDataField,
Encoding.GetEncoding("iso-8859-1"))).AppendLine();
break;
}
default:
{
sb.AppendFormat("Binary contents: {0}",
PrintHex.ByteArrayToHexArrayString(descriptor.TextDataField, 28))
.AppendLine();
break;
}
}
sb.AppendFormat("CRC: 0x{0:X4}", descriptor.CRC).AppendLine();
}
}
return(sb.ToString());
}
