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Attempt to more accurately parse layerbreaks

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This commit is contained in:
Matt Nadareski
2023-04-23 23:38:57 -04:00
parent af12c18d2e
commit 640e7091cc
4 changed files with 125 additions and 76 deletions
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76
MPF.Modules/DiscImageCreator/Parameters.cs
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@@ -461,7 +461,8 @@ namespace MPF.Modules.DiscImageCreator
}
else if (this.Type == MediaType.BluRay)
{
if (GetLayerbreak($"{basePath}_PIC.bin", out long? layerbreak1, out long? layerbreak2, out long? layerbreak3))
var di = GetDiscInformation($"{basePath}_PIC.bin");
if (GetLayerbreaks(di, out long? layerbreak1, out long? layerbreak2, out long? layerbreak3))
{
if (layerbreak1 != null && layerbreak1 * 2048 < info.SizeAndChecksums.Size)
info.SizeAndChecksums.Layerbreak = layerbreak1.Value;
@@ -2978,79 +2979,6 @@ namespace MPF.Modules.DiscImageCreator
}
}
/// <summary>
/// Get the layerbreak info associated with the dump
/// </summary>
/// <param name="picPath">Path to the PIC.bin file associated with the dump</param>
/// <returns>True if layerbreak info was set, false otherwise</returns>
/// <remarks>https://stackoverflow.com/questions/9932096/add-separator-to-string-at-every-n-characters</remarks>
private static bool GetLayerbreak(string picPath, out long? layerbreak1, out long? layerbreak2, out long? layerbreak3)
{
// Set the default values
layerbreak1 = null; layerbreak2 = null; layerbreak3 = null;
// If the file doesn't exist, we can't get the info
if (!File.Exists(picPath))
return false;
try
{
using (BinaryReader br = new BinaryReader(File.OpenRead(picPath)))
{
// Disc type
int infoLength;
br.BaseStream.Seek(0x0C, SeekOrigin.Begin);
string identifier = Encoding.ASCII.GetString(br.ReadBytes(3));
switch (identifier)
{
case "BDO":
infoLength = 0x40;
break;
case "BDW":
case "BDR":
infoLength = 0x74;
break;
default:
return false;
}
// Layerbreak 1
br.BaseStream.Seek((0 * infoLength) + 0x1C, SeekOrigin.Begin);
long layerbreak1Offset = br.ReadInt32BigEndian();
long layerbreak1Value = br.ReadInt32BigEndian();
if (layerbreak1Value == 0)
return false;
layerbreak1 = layerbreak1Value - layerbreak1Offset + 2;
// Layerbreak 2
br.BaseStream.Seek((1 * infoLength) + 0x1C, SeekOrigin.Begin);
long layerbreak2Offset = br.ReadInt32BigEndian();
long layerbreak2Value = br.ReadInt32BigEndian();
if (layerbreak2Value == 0)
return true;
layerbreak2 = layerbreak1 + layerbreak2Value - layerbreak2Offset + 2;
// Layerbreak 3
br.BaseStream.Seek((2 * infoLength) + 0x1C, SeekOrigin.Begin);
long layerbreak3Offset = br.ReadInt32BigEndian();
long layerbreak3Value = br.ReadInt32BigEndian();
if (layerbreak3Value == 0)
return true;
layerbreak3 = layerbreak2 + layerbreak3Value - layerbreak3Offset + 2;
return true;
}
}
catch
{
// We don't care what the error was
return false;
}
}
/// <summary>
/// Get multisession information from the input file, if possible
/// </summary>