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Add code to pretty print CD sectors.

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This commit is contained in:
Natalia Portillo
2020-07-18 15:49:52 +01:00
parent 55e420a423
commit 6547efafd2
1 changed files with 202 additions and 0 deletions
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202
CD/Sector.cs
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@@ -34,6 +34,8 @@ using System;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using Aaru.Checksums;
namespace Aaru.Decoders.CD
{
@@ -273,5 +275,205 @@ namespace Aaru.Decoders.CD
return sector;
}
public static string Prettify(byte[] buffer)
{
if(buffer is null ||
buffer.Length <= 0)
return null;
if(buffer[0] != 0x00 ||
buffer[1] != 0xFF ||
buffer[2] != 0xFF ||
buffer[3] != 0xFF ||
buffer[4] != 0xFF ||
buffer[5] != 0xFF ||
buffer[6] != 0xFF ||
buffer[7] != 0xFF ||
buffer[8] != 0xFF ||
buffer[9] != 0xFF ||
buffer[10] != 0xFF ||
buffer[11] != 0x00)
return "CD sector.";
var sb = new StringBuilder();
sb.AppendLine("CD-ROM sector.");
byte min = buffer[12];
byte sec = buffer[13];
byte frame = buffer[14];
int lba = 0;
bool moreThan90 = false;
if(min > 0x90)
{
lba += 405000;
min -= 0x90;
moreThan90 = true;
}
lba += (((min >> 4) * 10) + (min & 0x0F)) * 75 * 60;
lba += (((sec >> 4) * 10) + (sec & 0x0F)) * 75;
lba += ((frame >> 4) * 10) + (frame & 0x0F);
lba -= 150;
if(moreThan90)
min += 0x90;
sb.AppendFormat("Position {0:X2}:{1:X2}:{2:X2} (LBA {3})", min, sec, frame, lba).AppendLine();
switch(buffer[15] & 0x03)
{
case 0:
sb.AppendLine("Mode 0.");
break;
case 1:
sb.AppendLine("Mode 1.");
break;
case 2:
sb.AppendLine("Mode 2.");
break;
case 3:
sb.AppendLine("Invalid mode 0.");
break;
}
switch((buffer[15] & 0xE0) >> 5)
{
case 0:
sb.AppendLine("User data block");
break;
case 1:
sb.AppendLine("Fourth run-in block");
break;
case 2:
sb.AppendLine("Third run-in block");
break;
case 3:
sb.AppendLine("Second run-in block");
break;
case 4:
sb.AppendLine("First run-in block");
break;
case 5:
sb.AppendLine("Link block");
break;
case 6:
sb.AppendLine("Second run-out block");
break;
case 7:
sb.AppendLine("First run-out block");
break;
}
CdChecksums.CheckCdSector(buffer, out bool? correctEccP, out bool? correctEccQ, out bool? correctEdc);
bool empty = true;
switch(buffer[15] & 0x03)
{
case 0:
for(int i = 16; i < 2352; i++)
{
if(buffer[i] != 0x00)
{
empty = false;
break;
}
}
sb.AppendLine(empty ? "Correct sector contents." : "Incorrect sector contents.");
break;
case 1:
sb.AppendLine(correctEdc == true ? "Correct EDC." : "Incorrect EDC.");
sb.AppendLine(correctEccP == true ? "Correct ECC P." : "Incorrect ECC P.");
sb.AppendLine(correctEccQ == true ? "Correct ECC Q." : "Incorrect ECC Q.");
for(int i = 2068; i < 2076; i++)
{
if(buffer[i] != 0x00)
{
empty = false;
break;
}
}
sb.AppendLine(empty ? "Correct zero fill." : "Incorrect zero fill.");
break;
case 2:
if(buffer[16] != buffer[20] ||
buffer[17] != buffer[21] ||
buffer[18] != buffer[22] ||
buffer[19] != buffer[23])
{
sb.AppendLine("Subheader copies differ.");
sb.AppendLine(correctEdc == true ? "Correct EDC." : "Incorrect EDC.");
sb.AppendLine(correctEccP == true ? "Correct ECC P." : "Incorrect ECC P.");
sb.AppendLine(correctEccQ == true ? "Correct ECC Q." : "Incorrect ECC Q.");
break;
}
sb.AppendFormat("File number: {0}", buffer[16]);
sb.AppendFormat("Channel number: {0}", buffer[17]);
sb.AppendFormat("Coding information number: {0}", buffer[19]);
if((buffer[18] & 0x80) == 0x80)
sb.AppendLine("End of file.");
if((buffer[18] & 0x40) == 0x40)
sb.AppendLine("Real-time block.");
if((buffer[18] & 0x20) == 0x20)
sb.AppendLine("Form 2.");
else
sb.AppendLine("Form 1.");
if((buffer[18] & 0x10) == 0x10)
sb.AppendLine("Trigger block.");
if((buffer[18] & 0x08) == 0x08)
sb.AppendLine("Data block.");
if((buffer[18] & 0x04) == 0x04)
sb.AppendLine("Audio block.");
if((buffer[18] & 0x02) == 0x02)
sb.AppendLine("Video block.");
if((buffer[18] & 0x01) == 0x01)
sb.AppendLine("End of record.");
if((buffer[18] & 0x20) != 0x20)
{
sb.AppendLine(correctEccP == true ? "Correct ECC P." : "Incorrect ECC P.");
sb.AppendLine(correctEccQ == true ? "Correct ECC Q." : "Incorrect ECC Q.");
}
sb.AppendLine(correctEdc == true ? "Correct EDC." : "Incorrect EDC.");
break;
}
return sb.ToString();
}
}
}