1 files changed, 21 insertions, 3 deletions
diff --git a/engines/sci/resource_intern.h b/engines/sci/resource_intern.h
index f198eddeb3..ea3e05661f 100644
--- a/engines/sci/resource_intern.h
+++ b/engines/sci/resource_intern.h
@@ -144,17 +144,35 @@ public:
 
 class AudioVolumeResourceSource : public VolumeResourceSource {
 protected:
+	struct CompressedTableEntry {
+		uint32 offset;
+		uint32 size;
+	};
+
 	uint32 _audioCompressionType;
-	int32 *_audioCompressionOffsetMapping;
+	Common::HashMap<uint32, CompressedTableEntry> _compressedOffsets;
 
 public:
 	AudioVolumeResourceSource(ResourceManager *resMan, const Common::String &name, ResourceSource *map, int volNum);
 
-	virtual ~AudioVolumeResourceSource();
-
 	virtual void loadResource(ResourceManager *resMan, Resource *res);
 
 	virtual uint32 getAudioCompressionType() const;
+
+	bool relocateMapOffset(uint32 &offset, uint32 &size) const {
+		if (_audioCompressionType == 0) {
+			return true;
+		}
+
+		if (!_compressedOffsets.contains(offset)) {
+			return false;
+		}
+
+		const CompressedTableEntry &entry = _compressedOffsets.getVal(offset);
+		offset = entry.offset;
+		size = entry.size;
+		return true;
+	}
 };
 
 class ExtAudioMapResourceSource : public ResourceSource {