install go2rtc on bob

installs_on_host/go2rtc/pkg/bits/writer.go

@@ -0,0 +1,95 @@
+package bits
+
+type Writer struct {
+	buf  []byte // total buf
+	byte *byte  // pointer to current byte
+	bits byte   // bits left in byte
+}
+
+func NewWriter(buf []byte) *Writer {
+	return &Writer{buf: buf}
+}
+
+//goland:noinspection GoStandardMethods
+func (w *Writer) WriteByte(b byte) {
+	if w.bits != 0 {
+		w.WriteBits8(b, 8)
+	}
+
+	w.buf = append(w.buf, b)
+}
+
+func (w *Writer) WriteBit(b byte) {
+	if w.bits == 0 {
+		w.buf = append(w.buf, 0)
+		w.byte = &w.buf[len(w.buf)-1]
+		w.bits = 7
+	} else {
+		w.bits--
+	}
+
+	*w.byte |= (b & 1) << w.bits
+}
+
+func (w *Writer) WriteBits(v uint32, n byte) {
+	for i := n - 1; i != 255; i-- {
+		w.WriteBit(byte(v>>i) & 0b1)
+	}
+}
+
+func (w *Writer) WriteBits16(v uint16, n byte) {
+	for i := n - 1; i != 255; i-- {
+		w.WriteBit(byte(v>>i) & 0b1)
+	}
+}
+
+func (w *Writer) WriteBits8(v, n byte) {
+	for i := n - 1; i != 255; i-- {
+		w.WriteBit((v >> i) & 0b1)
+	}
+}
+
+func (w *Writer) WriteAllBits(bit, n byte) {
+	for i := byte(0); i < n; i++ {
+		w.WriteBit(bit)
+	}
+}
+
+func (w *Writer) WriteBool(b bool) {
+	if b {
+		w.WriteBit(1)
+	} else {
+		w.WriteBit(0)
+	}
+}
+
+func (w *Writer) WriteUint16(v uint16) {
+	if w.bits != 0 {
+		w.WriteBits16(v, 16)
+	}
+
+	w.buf = append(w.buf, byte(v>>8), byte(v))
+}
+
+func (w *Writer) WriteBytes(bytes ...byte) {
+	if w.bits != 0 {
+		for _, b := range bytes {
+			w.WriteByte(b)
+		}
+	}
+
+	w.buf = append(w.buf, bytes...)
+}
+
+func (w *Writer) Bytes() []byte {
+	return w.buf
+}
+
+func (w *Writer) Len() int {
+	return len(w.buf)
+}
+
+func (w *Writer) Reset() {
+	w.buf = w.buf[:0]
+	w.bits = 0
+}