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Added CD+G support.

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This commit is contained in:
Natalia Portillo
2015-10-02 01:14:19 +01:00
parent 9fda4d448c
commit 193be3146f
4 changed files with 210 additions and 1 deletions
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151
CD+G.cs Normal file
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@@ -0,0 +1,151 @@
//
// CD+G.cs
//
// Author:
// Natalia Portillo <claunia@claunia.com>
//
// Copyright (c) 2015 © Claunia.com
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
using System;
namespace SubChannelDecoder
{
public static class CD_G
{
public struct CD_G_Packet
{
public byte command;
public byte instruction;
public byte[] parityQ;
public byte[] data;
public byte[] parityP;
}
public enum CD_G_Instructions : byte
{
CDG_Memory_Preset = 1,
CDG_Border_Preset = 2,
CDG_Tile_Block = 6,
CDG_Scroll_Preset = 20,
CDG_Scroll_Copy = 24,
CDG_Define_Transparent = 28,
CDG_Load_Color_Table_0_7 = 30,
CDG_Load_Color_Table_8_15 = 31,
CDG_Tile_Block_XOR = 38
}
public const byte CD_G_Command = 0x09;
public static CD_G_Packet[] Packetize_CDG(byte[] subchannel)
{
CD_G_Packet[] packets = new CD_G_Packet[4];
for (int i = 0; i < 4; i++)
{
packets[i].parityQ = new byte[2];
packets[i].data = new byte[16];
packets[i].parityP = new byte[4];
packets[i].command = (byte)(subchannel[0 + i * 24] & 0x3F);
packets[i].instruction = (byte)(subchannel[1 + i * 24] & 0x3F);
packets[i].parityQ[0] = (byte)(subchannel[2 + i * 24] & 0x3F);
packets[i].parityQ[1] = (byte)(subchannel[3 + i * 24] & 0x3F);
packets[i].data[0] = (byte)(subchannel[4 + i * 24] & 0x3F);
packets[i].data[1] = (byte)(subchannel[5 + i * 24] & 0x3F);
packets[i].data[2] = (byte)(subchannel[6 + i * 24] & 0x3F);
packets[i].data[3] = (byte)(subchannel[7 + i * 24] & 0x3F);
packets[i].data[4] = (byte)(subchannel[8 + i * 24] & 0x3F);
packets[i].data[5] = (byte)(subchannel[9 + i * 24] & 0x3F);
packets[i].data[6] = (byte)(subchannel[10 + i * 24] & 0x3F);
packets[i].data[7] = (byte)(subchannel[11 + i * 24] & 0x3F);
packets[i].data[8] = (byte)(subchannel[12 + i * 24] & 0x3F);
packets[i].data[9] = (byte)(subchannel[13 + i * 24] & 0x3F);
packets[i].data[10] = (byte)(subchannel[14 + i * 24] & 0x3F);
packets[i].data[11] = (byte)(subchannel[15 + i * 24] & 0x3F);
packets[i].data[12] = (byte)(subchannel[16 + i * 24] & 0x3F);
packets[i].data[13] = (byte)(subchannel[17 + i * 24] & 0x3F);
packets[i].data[14] = (byte)(subchannel[18 + i * 24] & 0x3F);
packets[i].data[15] = (byte)(subchannel[19 + i * 24] & 0x3F);
packets[i].parityP[0] = (byte)(subchannel[20 + i * 24] & 0x3F);
packets[i].parityP[1] = (byte)(subchannel[21 + i * 24] & 0x3F);
packets[i].parityP[2] = (byte)(subchannel[22 + i * 24] & 0x3F);
packets[i].parityP[3] = (byte)(subchannel[23 + i * 24] & 0x3F);
}
return packets;
}
public static void PrintCDGPackets(byte[] subchannel)
{
PrintCDGPackets(Packetize_CDG(subchannel));
}
public static void PrintCDGPackets(CD_G_Packet[] packets)
{
for (int i = 0; i < packets.Length; i++)
{
Console.WriteLine("CD+G Packet {0}", i);
PrintCDGPacket(packets[i]);
}
}
public static void PrintCDGPacket(CD_G_Packet packet)
{
if (packet.command != CD_G_Command)
return;
switch (packet.instruction)
{
case (byte)CD_G_Instructions.CDG_Border_Preset:
Console.WriteLine("Border preset.");
break;
case (byte)CD_G_Instructions.CDG_Define_Transparent:
Console.WriteLine("Define transparent.");
break;
case (byte)CD_G_Instructions.CDG_Load_Color_Table_0_7:
Console.WriteLine("Load Color Table (0 to 7).");
break;
case (byte)CD_G_Instructions.CDG_Load_Color_Table_8_15:
Console.WriteLine("Load Color Table (8 to 15).");
break;
case (byte)CD_G_Instructions.CDG_Memory_Preset:
Console.WriteLine("Memory preset.");
break;
case (byte)CD_G_Instructions.CDG_Scroll_Copy:
Console.WriteLine("Scroll copy.");
break;
case (byte)CD_G_Instructions.CDG_Scroll_Preset:
Console.WriteLine("Scroll preset.");
break;
case (byte)CD_G_Instructions.CDG_Tile_Block:
Console.WriteLine("Tile block.");
break;
case (byte)CD_G_Instructions.CDG_Tile_Block_XOR:
Console.WriteLine("Tile block. (XOR)");
break;
default:
Console.WriteLine("Unknown instruction 0x{0:X2}", packet.instruction);
break;
}
Console.WriteLine("P Parity = 0x{0:X2}{1:X2}{2:X2}{3:X2}", packet.parityP[0], packet.parityP[1], packet.parityP[2], packet.parityP[3]);
Console.WriteLine("Q Parity = 0x{0:X2}{1:X2}", packet.parityQ[0], packet.parityQ[1]);
}
}
}

7
ChangeLog
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@@ -1,3 +1,10 @@
2015-10-02 Natalia Portillo <claunia@claunia.com>
* CD+G.cs:
* Program.cs:
* SubChannelDecoder.csproj:
Added CD+G support.
2015-10-01 Natalia Portillo <claunia@claunia.com>
* Program.cs:

52
Program.cs
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@@ -60,7 +60,7 @@ namespace SubChannelDecoder
public static void Main(string[] args)
{
Console.WriteLine("SubChannelDecoder 0.03");
Console.WriteLine("SubChannelDecoder 0.04");
Console.WriteLine("© 2015 Natalia Portillo");
Console.WriteLine();
@@ -143,6 +143,31 @@ namespace SubChannelDecoder
sub.w[6], sub.w[7], sub.w[8], sub.w[9], sub.w[10], sub.w[11]);
PrintQSubchannel(sub.q);
if(interleaved == true || interleaved == null)
{
if((sectorBytes[0] & 0x3F) == 0x09 ||
(sectorBytes[24] & 0x3F) == 0x09 ||
(sectorBytes[48] & 0x3F) == 0x09 ||
(sectorBytes[72] & 0x3F) == 0x09)
{
Console.WriteLine("CD+G detected.");
CD_G.PrintCDGPackets(sectorBytes);
}
}
else
{
byte[] interBytes = InterleaveSubchannel(sub);
if((interBytes[0] & 0x3F) == 0x09 ||
(interBytes[24] & 0x3F) == 0x09 ||
(interBytes[48] & 0x3F) == 0x09 ||
(interBytes[72] & 0x3F) == 0x09)
{
Console.WriteLine("CD+G detected.");
CD_G.PrintCDGPackets(interBytes);
}
}
}
}
else
@@ -219,6 +244,29 @@ namespace SubChannelDecoder
sub.w[6], sub.w[7], sub.w[8], sub.w[9], sub.w[10], sub.w[11]);
PrintQSubchannel(sub.q);
if(interleaved == true || interleaved == null)
{
if((sectorBytes[0] & 0x3F) == 0x09 ||
(sectorBytes[24] & 0x3F) == 0x09 ||
(sectorBytes[48] & 0x3F) == 0x09 ||
(sectorBytes[72] & 0x3F) == 0x09)
{
Console.WriteLine("CD+G detected.");
}
}
else
{
byte[] interBytes = InterleaveSubchannel(sub);
if((interBytes[0] & 0x3F) == 0x09 ||
(interBytes[24] & 0x3F) == 0x09 ||
(interBytes[48] & 0x3F) == 0x09 ||
(interBytes[72] & 0x3F) == 0x09)
{
Console.WriteLine("CD+G detected.");
}
}
}
}
catch
@@ -235,6 +283,8 @@ namespace SubChannelDecoder
Console.WriteLine("Sector is part of a data track");
if ((q[0] & QPreEmphasis) == QPreEmphasis)
Console.WriteLine("Track has been recorded incrementally");
if ((q[0] & QQuadraphonic) == QQuadraphonic)
Console.WriteLine("Track is for broadcsting use");
}
else
{

1
SubChannelDecoder.csproj
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@@ -38,6 +38,7 @@
<Compile Include="Subchannel.cs" />
<Compile Include="CRC16CCITTContext.cs" />
<Compile Include="BigEndianBitConverter.cs" />
<Compile Include="CD+G.cs" />
</ItemGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
</Project>