Adding modding folder with a hacked build.

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

@@ -0,0 +1,34 @@
+package compression
+
+// BitstreamWriter is a utility to write big-endian integer values of arbitrary bit size to a bitstream.
+type BitstreamWriter struct {
+	buf []byte
+
+	offset uint
+}
+
+// Buffer returns the currently stored buffer.
+func (w BitstreamWriter) Buffer() []byte {
+	return w.buf
+}
+
+// Write stores the given amount of bits from the provided value.
+// Trying to write more than 32 bits will cause panic.
+func (w *BitstreamWriter) Write(bits uint, value uint32) {
+	if bits > 32 {
+		panic("maximum of 32 bits are possible to be written")
+	}
+	for bits > 0 {
+		temp := (uint64(value) & ^(^uint64(0) << bits)) << (40 - bits - w.offset)
+		if w.offset == 0 {
+			w.buf = append(w.buf, 0x00)
+		}
+		w.buf[len(w.buf)-1] |= byte(temp >> 32)
+		written := 8 - w.offset
+		if written > bits {
+			written = bits
+		}
+		bits -= written
+		w.offset = (w.offset + written) % 8
+	}
+}