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https://github.com/aaru-dps/Aaru.git
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Detect PhotoCD. Fixes #322.
This commit is contained in:
@@ -833,8 +833,196 @@ namespace Aaru.Core.Media.Detection
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break;
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// Recordables will not be checked
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// Recordables will be checked for PhotoCD only
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case MediaType.CDR:
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// Check if ISO9660
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sense = dev.Read12(out byte[] isoSector, out _, 0, false, true, false, false, 16, 2048, 0, 1, false,
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dev.Timeout, out _);
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// Sector 16 reads, and contains "CD001" magic?
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if(sense ||
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isoSector[1] != 0x43 ||
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isoSector[2] != 0x44 ||
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isoSector[3] != 0x30 ||
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isoSector[4] != 0x30 ||
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isoSector[5] != 0x31)
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return;
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// From sectors 16 to 31
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uint isoSectorPosition = 16;
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while(isoSectorPosition < 32)
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{
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sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, isoSectorPosition, 2048,
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0, 1, false, dev.Timeout, out _);
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// If sector cannot be read, break here
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if(sense)
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break;
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// If sector does not contain "CD001" magic, break
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if(isoSector[1] != 0x43 ||
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isoSector[2] != 0x44 ||
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isoSector[3] != 0x30 ||
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isoSector[4] != 0x30 ||
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isoSector[5] != 0x31)
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break;
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// If it is PVD or end of descriptor chain, break
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if(isoSector[0] == 1 ||
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isoSector[0] == 255)
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break;
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isoSectorPosition++;
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}
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// If it's not an ISO9660 PVD, return
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if(isoSector[0] != 1 ||
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isoSector[1] != 0x43 ||
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isoSector[2] != 0x44 ||
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isoSector[3] != 0x30 ||
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isoSector[4] != 0x30 ||
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isoSector[5] != 0x31)
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return;
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uint rootStart = BitConverter.ToUInt32(isoSector, 158);
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uint rootLength = BitConverter.ToUInt32(isoSector, 166);
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if(rootStart == 0 ||
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rootLength == 0)
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return;
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rootLength /= 2048;
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try
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{
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using var rootMs = new MemoryStream();
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for(uint i = 0; i < rootLength; i++)
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{
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sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, rootStart + i, 2048,
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0, 1, false, dev.Timeout, out _);
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if(sense)
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break;
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rootMs.Write(isoSector, 0, 2048);
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}
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isoSector = rootMs.ToArray();
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}
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catch
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{
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return;
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}
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if(isoSector.Length < 2048)
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return;
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int rootPos = 0;
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uint pcdStart = 0;
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uint pcdLength = 0;
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while(isoSector[rootPos] > 0 &&
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rootPos < isoSector.Length &&
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rootPos + isoSector[rootPos] <= isoSector.Length)
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{
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int nameLen = isoSector[rootPos + 32];
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byte[] tmpName = new byte[nameLen];
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Array.Copy(isoSector, rootPos + 33, tmpName, 0, nameLen);
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string name = StringHandlers.CToString(tmpName).ToUpperInvariant();
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if(name.EndsWith(";1", StringComparison.InvariantCulture))
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name = name.Substring(0, name.Length - 2);
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if(name == "PHOTO_CD" &&
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(isoSector[rootPos + 25] & 0x02) == 0x02)
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{
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pcdStart = BitConverter.ToUInt32(isoSector, rootPos + 2);
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pcdLength = BitConverter.ToUInt32(isoSector, rootPos + 10) / 2048;
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}
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rootPos += isoSector[rootPos];
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}
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if(pcdLength > 0)
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{
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try
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{
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using var pcdMs = new MemoryStream();
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for(uint i = 0; i < pcdLength; i++)
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{
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sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, pcdStart + i,
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2048, 0, 1, false, dev.Timeout, out _);
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if(sense)
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break;
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pcdMs.Write(isoSector, 0, 2048);
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}
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isoSector = pcdMs.ToArray();
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}
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catch
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{
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return;
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}
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if(isoSector.Length < 2048)
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return;
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int pcdPos = 0;
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uint infoPos = 0;
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while(isoSector[pcdPos] > 0 &&
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pcdPos < isoSector.Length &&
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pcdPos + isoSector[pcdPos] <= isoSector.Length)
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{
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int nameLen = isoSector[pcdPos + 32];
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byte[] tmpName = new byte[nameLen];
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Array.Copy(isoSector, pcdPos + 33, tmpName, 0, nameLen);
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string name = StringHandlers.CToString(tmpName).ToUpperInvariant();
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if(name.EndsWith(";1", StringComparison.InvariantCulture))
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name = name.Substring(0, name.Length - 2);
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if(name == "INFO.PCD")
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{
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infoPos = BitConverter.ToUInt32(isoSector, pcdPos + 2);
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break;
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}
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pcdPos += isoSector[pcdPos];
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}
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if(infoPos > 0)
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{
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sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, infoPos, 2048, 0, 1,
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false, dev.Timeout, out _);
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if(sense)
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break;
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byte[] systemId = new byte[8];
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Array.Copy(isoSector, 0, systemId, 0, 8);
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string id = StringHandlers.CToString(systemId).TrimEnd();
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switch(id)
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{
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case "PHOTO_CD":
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mediaType = MediaType.PCD;
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return;
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}
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}
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}
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break;
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// Other recordables will not be checked
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case MediaType.CDRW:
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case MediaType.CDMRW:
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case MediaType.DDCDR:
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@@ -1112,6 +1300,8 @@ namespace Aaru.Core.Media.Detection
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uint ngcdIplLength = 0;
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uint vcdStart = 0;
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uint vcdLength = 0;
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uint pcdStart = 0;
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uint pcdLength = 0;
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while(isoSector[rootPos] > 0 &&
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rootPos < isoSector.Length &&
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@@ -1140,6 +1330,13 @@ namespace Aaru.Core.Media.Detection
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vcdLength = BitConverter.ToUInt32(isoSector, rootPos + 10) / 2048;
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}
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if(name == "PHOTO_CD" &&
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(isoSector[rootPos + 25] & 0x02) == 0x02)
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{
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pcdStart = BitConverter.ToUInt32(isoSector, rootPos + 2);
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pcdLength = BitConverter.ToUInt32(isoSector, rootPos + 10) / 2048;
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}
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rootPos += isoSector[rootPos];
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}
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@@ -1380,6 +1577,81 @@ namespace Aaru.Core.Media.Detection
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}
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}
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if(pcdLength > 0)
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{
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try
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{
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using var pcdMs = new MemoryStream();
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for(uint i = 0; i < pcdLength; i++)
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{
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sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, pcdStart + i,
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2048, 0, 1, false, dev.Timeout, out _);
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if(sense)
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break;
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pcdMs.Write(isoSector, 0, 2048);
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}
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isoSector = pcdMs.ToArray();
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}
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catch
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{
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return;
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}
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if(isoSector.Length < 2048)
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return;
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int pcdPos = 0;
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uint infoPos = 0;
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while(isoSector[pcdPos] > 0 &&
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pcdPos < isoSector.Length &&
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pcdPos + isoSector[pcdPos] <= isoSector.Length)
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{
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int nameLen = isoSector[pcdPos + 32];
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byte[] tmpName = new byte[nameLen];
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Array.Copy(isoSector, pcdPos + 33, tmpName, 0, nameLen);
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string name = StringHandlers.CToString(tmpName).ToUpperInvariant();
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if(name.EndsWith(";1", StringComparison.InvariantCulture))
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name = name.Substring(0, name.Length - 2);
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if(name == "INFO.PCD")
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{
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infoPos = BitConverter.ToUInt32(isoSector, pcdPos + 2);
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break;
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}
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pcdPos += isoSector[pcdPos];
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}
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if(infoPos > 0)
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{
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sense = dev.Read12(out isoSector, out _, 0, false, true, false, false, infoPos, 2048, 0, 1,
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false, dev.Timeout, out _);
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if(sense)
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break;
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byte[] systemId = new byte[8];
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Array.Copy(isoSector, 0, systemId, 0, 8);
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string id = StringHandlers.CToString(systemId).TrimEnd();
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switch(id)
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{
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case "PHOTO_CD":
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mediaType = MediaType.PCD;
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return;
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}
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}
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}
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break;
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}
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