DiscIO/DirectoryBlob: Add a content source representing a run of padding bytes.

2 files changed, 14 insertions, 1 deletions

diff --git a/Source/Core/DiscIO/DirectoryBlob.cpp b/Source/Core/DiscIO/DirectoryBlob.cpp
index c86b0396a2..356416b076 100644
--- a/Source/Core/DiscIO/DirectoryBlob.cpp
+++ b/Source/Core/DiscIO/DirectoryBlob.cpp
@@ -132,6 +132,11 @@ bool DiscContent::Read(u64* offset, u64* length, u8** buffer) const
         return false;
       }
     }
+    else if (std::holds_alternative<ContentFixedByte>(m_content_source))
+    {
+      const ContentFixedByte& source = std::get<ContentFixedByte>(m_content_source);
+      std::fill_n(*buffer, bytes_to_read, source.m_byte);
+    }
     else
     {
       PanicAlertFmt("DirectoryBlob: Invalid content source in DiscContent.");
diff --git a/Source/Core/DiscIO/DirectoryBlob.h b/Source/Core/DiscIO/DirectoryBlob.h
index e942c14a94..5ab03137e5 100644
--- a/Source/Core/DiscIO/DirectoryBlob.h
+++ b/Source/Core/DiscIO/DirectoryBlob.h
@@ -71,10 +71,18 @@ struct ContentVolume
   Partition m_partition;
 };
 
+// Content chunk representing a run of identical bytes.
+// Useful for padding between chunks within a file.
+struct ContentFixedByte
+{
+  u8 m_byte;
+};
+
 using ContentSource = std::variant<ContentFile,       // File
                                    const u8*,         // Memory
                                    ContentPartition,  // Partition
-                                   ContentVolume      // Volume
+                                   ContentVolume,     // Volume
+                                   ContentFixedByte   // Fixed value padding
                                    >;
 
 class DiscContent