horizontal_scrolling_over_hid

app/src/control_msg.c

@@ -127,14 +127,10 @@ sc_control_msg_serialize(const struct sc_control_msg *msg, uint8_t *buf) {
             return 32;
         case SC_CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT:
             write_position(&buf[1], &msg->inject_scroll_event.position);
-            // Accept values in the range [-16, 16].
-            // Normalize to [-1, 1] in order to use sc_float_to_i16fp().
-            float hscroll_norm = msg->inject_scroll_event.hscroll / 16;
-            hscroll_norm = CLAMP(hscroll_norm, -1, 1);
-            float vscroll_norm = msg->inject_scroll_event.vscroll / 16;
-            vscroll_norm = CLAMP(vscroll_norm, -1, 1);
-            int16_t hscroll = sc_float_to_i16fp(hscroll_norm);
-            int16_t vscroll = sc_float_to_i16fp(vscroll_norm);
+            int16_t hscroll =
+                sc_float_to_i16fp(msg->inject_scroll_event.hscroll);
+            int16_t vscroll =
+                sc_float_to_i16fp(msg->inject_scroll_event.vscroll);
             sc_write16be(&buf[13], (uint16_t) hscroll);
             sc_write16be(&buf[15], (uint16_t) vscroll);
             sc_write32be(&buf[17], msg->inject_scroll_event.buttons);

server/src/main/java/com/genymobile/scrcpy/control/ControlMessageReader.java

@@ -112,9 +112,8 @@ public class ControlMessageReader {
 
     private ControlMessage parseInjectScrollEvent() throws IOException {
         Position position = parsePosition();
-        // Binary.i16FixedPointToFloat() decodes values assuming the full range is [-1, 1], but the actual range is [-16, 16].
-        float hScroll = Binary.i16FixedPointToFloat(dis.readShort()) * 16;
-        float vScroll = Binary.i16FixedPointToFloat(dis.readShort()) * 16;
+        float hScroll = Binary.i16FixedPointToFloat(dis.readShort());
+        float vScroll = Binary.i16FixedPointToFloat(dis.readShort());
         int buttons = dis.readInt();
         return ControlMessage.createInjectScrollEvent(position, hScroll, vScroll, buttons);
     }