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Detect VideoCD and Super Video CD. Fixes #327

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This commit is contained in:
Natalia Portillo
2020-06-21 18:01:41 +01:00
parent 97f8a860a4
commit 8b2e2b5dec
1 changed files with 93 additions and 3 deletions
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96
Aaru.Core/Media/Detection/MMC.cs
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@@ -1104,12 +1104,14 @@ namespace Aaru.Core.Media.Detection
}
if(isoSector.Length < 2048)
break;
return;
List<string> rootEntries = new List<string>();
int rootPos = 0;
uint ngcdIplStart = 0;
uint ngcdIplLength = 0;
uint vcdStart = 0;
uint vcdLength = 0;
while(isoSector[rootPos] > 0 &&
rootPos < isoSector.Length &&
@@ -1123,7 +1125,6 @@ namespace Aaru.Core.Media.Detection
if(name.EndsWith(";1", StringComparison.InvariantCulture))
name = name.Substring(0, name.Length - 2);
// TODO: Video CD and Super Video CD
rootEntries.Add(name);
if(name == "IPL.TXT")
@@ -1132,6 +1133,13 @@ namespace Aaru.Core.Media.Detection
ngcdIplLength = BitConverter.ToUInt32(isoSector, rootPos + 10);
}
if((name == "VCD" || name == "SVCD") &&
(isoSector[rootPos + 25] & 0x02) == 0x02)
{
vcdStart = BitConverter.ToUInt32(isoSector, rootPos + 2);
vcdLength = BitConverter.ToUInt32(isoSector, rootPos + 10) / 2048;
}
rootPos += isoSector[rootPos];
}
@@ -1285,6 +1293,89 @@ namespace Aaru.Core.Media.Detection
if(correctNeoGeoCd)
{
mediaType = MediaType.NeoGeoCD;
return;
}
}
}
if(vcdLength > 0)
{
try
{
using var vcdMs = new MemoryStream();
for(uint i = 0; i < vcdLength; i++)
{
sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, vcdStart + i,
2048, 0, 1, false, dev.Timeout, out _);
if(sense)
break;
vcdMs.Write(isoSector, 0, 2048);
}
isoSector = vcdMs.ToArray();
}
catch
{
return;
}
if(isoSector.Length < 2048)
return;
int vcdPos = 0;
uint infoPos = 0;
while(isoSector[vcdPos] > 0 &&
vcdPos < isoSector.Length &&
vcdPos + isoSector[vcdPos] <= isoSector.Length)
{
int nameLen = isoSector[vcdPos + 32];
byte[] tmpName = new byte[nameLen];
Array.Copy(isoSector, vcdPos + 33, tmpName, 0, nameLen);
string name = StringHandlers.CToString(tmpName).ToUpperInvariant();
if(name.EndsWith(";1", StringComparison.InvariantCulture))
name = name.Substring(0, name.Length - 2);
if(name == "INFO.VCD" ||
name == "INFO.SVD")
{
infoPos = BitConverter.ToUInt32(isoSector, vcdPos + 2);
break;
}
vcdPos += isoSector[vcdPos];
}
if(infoPos > 0)
{
sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, infoPos, 2048, 0, 1,
false, dev.Timeout, out _);
if(sense)
break;
byte[] systemId = new byte[8];
Array.Copy(isoSector, 0, systemId, 0, 8);
string id = StringHandlers.CToString(systemId).TrimEnd();
switch(id)
{
case "VIDEO_CD":
mediaType = MediaType.VCD;
return;
case "SUPERVCD":
case "HQ-VCD":
mediaType = MediaType.SVCD;
break;
}
}
}
@@ -1345,7 +1436,6 @@ namespace Aaru.Core.Media.Detection
mediaType = MediaType.PS4BD;
}
// TODO: Identify discs that require reading tracks (PC-FX, PlayStation, Sega, etc)
break;
}
}