Adding modding folder with a hacked build.

modding/hacked/ss1/content/movie/internal/compression/UnpackControlWords.go

@@ -0,0 +1,46 @@
+package compression
+
+import (
+	"bytes"
+	"encoding/binary"
+)
+
+// UnpackControlWords reads from an encoded string of bytes a series of packed control words.
+// If all is OK, the control words are returned. If the function returns an error, something
+// could not be read/decoded properly.
+func UnpackControlWords(data []byte) (words []ControlWord, err error) {
+	if len(data) < 4 {
+		return nil, ErrFormat
+	}
+
+	var controlBytes uint32
+	reader := bytes.NewReader(data)
+
+	err = binary.Read(reader, binary.LittleEndian, &controlBytes)
+	if err != nil {
+		return
+	}
+	if controlBytes%bytesPerControlWord != 0 {
+		return nil, ErrFormat
+	}
+	wordCount := int(controlBytes / bytesPerControlWord)
+	unpacked := 0
+
+	words = make([]ControlWord, wordCount)
+	for unpacked < wordCount {
+		var packed PackedControlWord
+		err = binary.Read(reader, binary.LittleEndian, &packed)
+		if err != nil {
+			return
+		}
+		times := packed.Times()
+		if times > len(words)-unpacked {
+			return nil, ErrFormat
+		}
+		for i := 0; i < times; i++ {
+			words[unpacked+i] = packed.Value()
+		}
+		unpacked += times
+	}
+	return
+}