extract webrtc payload to own module.

internal/webrtc/payload/receive.go

@@ -0,0 +1,30 @@
+package payload
+
+const (
+	OP_MOVE     = 0x01
+	OP_SCROLL   = 0x02
+	OP_KEY_DOWN = 0x03
+	OP_KEY_UP   = 0x04
+	OP_BTN_DOWN = 0x05
+	OP_BTN_UP   = 0x06
+)
+
+type Move struct {
+	Header
+
+	X uint16
+	Y uint16
+}
+
+type Scroll struct {
+	Header
+
+	X int16
+	Y int16
+}
+
+type Key struct {
+	Header
+
+	Key uint32
+}