refactor(scrcpy): rewrite option classes to improve tree-shaking

libraries/scrcpy/src/1_25/impl/scroll-controller.ts

@@ -0,0 +1,50 @@
+import { getInt16, setInt16 } from "@yume-chan/no-data-view";
+import type { Field, StructInit } from "@yume-chan/struct";
+import { bipedal, struct, u16, u32, u8 } from "@yume-chan/struct";
+
+import type { ScrcpyScrollController } from "../../base/index.js";
+import type { ScrcpyInjectScrollControlMessage } from "../../latest.js";
+
+import { PrevImpl } from "./prev.js";
+
+export const SignedFloat: Field<number, never, never> = {
+    size: 2,
+    serialize(value, { buffer, index, littleEndian }) {
+        // https://github.com/Genymobile/scrcpy/blob/1f138aef41de651668043b32c4effc2d4adbfc44/app/src/util/binary.h#L51
+        value = PrevImpl.clamp(value, -1, 1);
+        value = value === 1 ? 0x7fff : value * 0x8000;
+        setInt16(buffer, index, value, littleEndian);
+    },
+    deserialize: bipedal(function* (then, { reader, littleEndian }) {
+        const data = yield* then(reader.readExactly(2));
+        const value = getInt16(data, 0, littleEndian);
+        // https://github.com/Genymobile/scrcpy/blob/1f138aef41de651668043b32c4effc2d4adbfc44/server/src/main/java/com/genymobile/scrcpy/Binary.java#L34
+        return value === 0x7fff ? 1 : value / 0x8000;
+    }),
+};
+
+export const InjectScrollControlMessage = struct(
+    {
+        type: u8,
+        pointerX: u32,
+        pointerY: u32,
+        screenWidth: u16,
+        screenHeight: u16,
+        scrollX: SignedFloat,
+        scrollY: SignedFloat,
+        buttons: u32,
+    },
+    { littleEndian: false },
+);
+
+export type InjectScrollControlMessage = StructInit<
+    typeof InjectScrollControlMessage
+>;
+
+export class ScrollController implements ScrcpyScrollController {
+    serializeScrollMessage(
+        message: ScrcpyInjectScrollControlMessage,
+    ): Uint8Array | undefined {
+        return InjectScrollControlMessage.serialize(message);
+    }
+}