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Identify HD DVD video ISOs

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Rebecca Wallander
2026-04-11 12:49:01 +02:00
parent 7f3502e80f
commit 70f0d8c0ff
3 changed files with 264 additions and 0 deletions
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65
Aaru.Decryption/Aacs/HDDVD.cs Normal file
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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : HDDVD.cs
// Author(s) : Rebecca Wallander <sakcheen@gmail.com>
//
// --[ Description ] ----------------------------------------------------------
//
// HD DVD video disc helpers.
//
// --[ License ] --------------------------------------------------------------
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// ----------------------------------------------------------------------------
// Copyright © 2026 Rebecca Wallander
// ****************************************************************************/
using Aaru.CommonTypes;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Interfaces;
using Aaru.CommonTypes.Structs;
namespace Aaru.Decryption.Aacs;
/// <summary>Aligns contiguous 2048-byte sectors to CPS units for decrypt during image conversion.</summary>
public sealed class HDDVD
{
/// <summary>
/// HD DVD video discs always have a <c>HVDVD_TS</c> folder. If it doesn't have one, it's not a HD DVD video.
/// </summary>
/// <param name="input"><c>IOpticalMediaImage</c> to check for <c>HVDVD_TS</c> folder in.</param>
/// <param name="fs"><c>IReadOnlyFilesystem</c> to check in.</param>
/// <param name="partition"><c>Partition</c> to check in.</param>
/// <returns><c>true</c> if <c>HVDVD_TS</c> folder was found.</returns>
public static bool HasHdDvdVideoTsFolder(IOpticalMediaImage input, IReadOnlyFilesystem fs, Partition partition)
{
ErrorNumber error = fs.Mount(input, partition, null, null, null);
if(error != ErrorNumber.NoError) return false;
error = fs.Stat("HVDVD_TS", out FileEntryInfo stat);
fs.Unmount();
return error == ErrorNumber.NoError;
}
}

189
Aaru.Images/ZZZRawImage/HdDvdIsoProbe.cs Normal file
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// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename : HdDvdIsoProbe.cs
// Author(s) : Rebecca Wallander <sakcheen@gmail.com>
//
// Component : Disk image plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Detects HD DVD-Video layout on bare .iso images (HVDVD_TS folder).
// Aaru.Core.Partitions.GetAll cannot be called from this assembly because
// Aaru.Core references Aaru.Images; the partition walk below mirrors the
// non-tape, in Partitions.GetAll. If we find a simpler way to detect a
// HD DVD-Video layout, we should use that instead.
//
// --[ License ] --------------------------------------------------------------
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, see
// <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2026 Rebecca Wallander
// ****************************************************************************/
using System.Collections.Generic;
using System.Linq;
using Aaru.CommonTypes;
using Aaru.CommonTypes.Interfaces;
using Aaru.CommonTypes.Structs;
using Aaru.Decryption.Aacs;
namespace Aaru.Images;
public sealed partial class ZZZRawImage
{
/// <summary>True if a filesystem under some partition exposes the HD DVD-Video <c>HVDVD_TS</c> folder.</summary>
bool TryDetectHdDvdVideoIso()
{
IMediaImage image = this;
IOpticalMediaImage optical = this;
PluginRegister plugins = PluginRegister.Singleton;
List<Partition> parts = EnumeratePartitionsForHdDvdProbe(image);
foreach(Partition partition in parts)
{
foreach(IFilesystem fs in plugins.Filesystems.Values)
{
if(fs is not IReadOnlyFilesystem rofs)
continue;
if(!fs.Identify(image, partition))
continue;
if(HDDVD.HasHdDvdVideoTsFolder(optical, rofs, partition))
return true;
}
}
return false;
}
/// <summary>
/// Lists partitions the same way as <see cref="Aaru.Core.Partitions.GetAll"/> for images that are not
/// tape.
/// </summary>
static List<Partition> EnumeratePartitionsForHdDvdProbe(IMediaImage image)
{
PluginRegister plugins = PluginRegister.Singleton;
List<Partition> foundPartitions = [];
List<Partition> childPartitions = [];
List<ulong> checkedLocations = [];
var partitionableImage = image as IPartitionableMediaImage;
// Getting all partitions from device (e.g. tracks)
if(partitionableImage?.Partitions != null)
{
foreach(Partition imagePartition in partitionableImage.Partitions)
{
foreach(IPartition plugin in plugins.Partitions.Values)
{
if(plugin is null) continue;
if(!plugin.GetInformation(image, out List<Partition> partitions, imagePartition.Start)) continue;
foundPartitions.AddRange(partitions);
}
checkedLocations.Add(imagePartition.Start);
}
}
if(!checkedLocations.Contains(0) && image.Info.Sectors > 0)
{
foreach(IPartition plugin in plugins.Partitions.Values)
{
if(plugin is null)
continue;
if(!plugin.GetInformation(image, out List<Partition> partitions, 0))
continue;
foundPartitions.AddRange(partitions);
}
checkedLocations.Add(0);
}
while(foundPartitions.Count > 0)
{
if(checkedLocations.Contains(foundPartitions[0].Start))
{
childPartitions.Add(foundPartitions[0]);
foundPartitions.RemoveAt(0);
continue;
}
List<Partition> children = [];
foreach(IPartition plugin in plugins.Partitions.Values)
{
if(plugin is null)
continue;
if(!plugin.GetInformation(image, out List<Partition> partitions, foundPartitions[0].Start))
continue;
children.AddRange(partitions);
}
checkedLocations.Add(foundPartitions[0].Start);
if(children.Count > 0)
{
foundPartitions.RemoveAt(0);
foreach(Partition child in children)
{
if(checkedLocations.Contains(child.Start))
childPartitions.Add(child);
else
foundPartitions.Add(child);
}
}
else
{
childPartitions.Add(foundPartitions[0]);
foundPartitions.RemoveAt(0);
}
}
if(partitionableImage is not null)
{
List<ulong> startLocations =
childPartitions.ConvertAll(static detectedPartition => detectedPartition.Start);
if(partitionableImage.Partitions != null)
{
childPartitions.AddRange(partitionableImage.Partitions.Where(imagePartition =>
!startLocations.Contains(imagePartition
.Start)));
}
}
Partition[] childArray = childPartitions.OrderBy(static part => part.Start)
.ThenBy(static part => part.Length)
.ThenBy(static part => part.Scheme)
.ToArray();
for(long i = 0; i < childArray.LongLength; i++)
childArray[i].Sequence = (ulong)i;
return childArray.ToList();
}
}

10
Aaru.Images/ZZZRawImage/Read.cs
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@@ -619,6 +619,16 @@ public sealed partial class ZZZRawImage
else if(gcMagic == NGC_GC_MAGIC) _imageInfo.MediaType = MediaType.GOD; else if(gcMagic == NGC_GC_MAGIC) _imageInfo.MediaType = MediaType.GOD;
} }
// Check for HD DVD video discs: .iso extension, size divisible by 2048, contains HVDVD_TS folder
// Needed for identifying the correct AACS path, so we don't misidentify it as a BD video disc
if(_extension == ".iso" &&
_imageInfo.SectorSize == 2048 &&
_imageInfo.ImageSize % 2048 == 0 &&
_imageInfo.Sectors > 0 &&
(_imageInfo.MediaType == MediaType.BDR || _imageInfo.MediaType == MediaType.BDRXL) &&
TryDetectHdDvdVideoIso())
_imageInfo.MediaType = MediaType.HDDVDROM;
// Check for bare .bca sidecar (64 bytes) for GameCube/Wii discs // Check for bare .bca sidecar (64 bytes) for GameCube/Wii discs
if(_imageInfo.MediaType is MediaType.GOD or MediaType.WOD && !_mediaTags.ContainsKey(MediaTagType.DVD_BCA)) if(_imageInfo.MediaType is MediaType.GOD or MediaType.WOD && !_mediaTags.ContainsKey(MediaTagType.DVD_BCA))
{ {