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(PD): workaround for obfuscated OGG files.

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This commit is contained in:
morkt 2019-01-23 06:00:06 +04:00
parent 6fca707142
commit 1dbe45cf1e
1 changed files with 16 additions and 1 deletions
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17
ArcFormats/FlyingShine/ArcPD.cs
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@ -240,7 +240,7 @@ namespace GameRes.Formats.Fs
if (len <= 0 || len >= 0x24)
return null;
string name = enc.GetString (buf, 0, len);
var entry = FormatCatalog.Instance.Create<Entry> (name);
var entry = Create<Entry> (name);
uint shift = LittleEndian.ToUInt32 (buf, 0x24);
entry.Offset = LittleEndian.ToUInt32 (buf, 0x28) - shift;
entry.Size = LittleEndian.ToUInt32 (buf, 0x2c) - shift;
@ -254,6 +254,8 @@ namespace GameRes.Formats.Fs
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (entry.Name.HasExtension (".ogg") && entry.Size > 0x22)
return OpenOgg (arc, entry);
if (!entry.Name.HasAnyOfExtensions (".def", ".dsf") || entry.Size < 2)
return base.OpenEntry (arc, entry);
var data = arc.File.View.ReadBytes (entry.Offset, entry.Size);
@ -265,6 +267,19 @@ namespace GameRes.Formats.Fs
return new BinMemoryStream (data);
}
Stream OpenOgg (ArcFile arc, Entry entry)
{
const uint header_length = 0x23;
var header = arc.File.View.ReadBytes (entry.Offset, header_length);
if (!(header.AsciiEqual (0, "OggS") &&
header[0x1A] != 1 && header[0x1B] == 0x1E && header[0x1C] == 1 &&
header.AsciiEqual (0x1D, "vorbis")))
return base.OpenEntry (arc, entry);
header[0x1A] = 1;
var rest = arc.File.CreateStream (entry.Offset+header_length, entry.Size-header_length);
return new PrefixStream (header, rest);
}
void DecodeEntry (byte[] buf, byte key)
{
for (int i = 0; i < buf.Length; ++i)