feat: add opt-in native Nintendo rumble backend

tests/switch_native_output_native_stubs/btstack.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <stdint.h>
+
+enum btstack_data_source_callback_type_t {
+    DATA_SOURCE_CALLBACK_POLL = 4,
+};
+
+struct btstack_data_source_t {
+    void (*handler)(btstack_data_source_t*, btstack_data_source_callback_type_t) = nullptr;
+    uint16_t callbacks = 0;
+};
+
+struct btstack_timer_source_t {
+    void (*handler)(btstack_timer_source_t*) = nullptr;
+    uint64_t due_us = 0;
+};
+
+void btstack_run_loop_set_data_source_handler(
+    btstack_data_source_t* source,
+    void (*handler)(btstack_data_source_t*, btstack_data_source_callback_type_t));
+void btstack_run_loop_enable_data_source_callbacks(btstack_data_source_t* source,
+                                                   uint16_t callbacks);
+void btstack_run_loop_add_data_source(btstack_data_source_t* source);
+void btstack_run_loop_poll_data_sources_from_irq();
+void btstack_run_loop_set_timer_handler(btstack_timer_source_t* timer,
+                                         void (*handler)(btstack_timer_source_t*));
+void btstack_run_loop_set_timer(btstack_timer_source_t* timer, uint32_t timeout_ms);
+void btstack_run_loop_add_timer(btstack_timer_source_t* timer);
+bool btstack_run_loop_remove_timer(btstack_timer_source_t* timer);
+uint8_t l2cap_request_can_send_now_event(uint16_t cid);

tests/switch_native_output_native_stubs/parser/uni_hid_parser_switch.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <uni.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool uni_hid_parser_switch_native_info(uni_hid_device_t* device, uint8_t* type,
+                                       uint8_t* firmware_hi, uint8_t* firmware_lo);
+bool uni_hid_parser_switch_native_acquire(uni_hid_device_t* device);
+bool uni_hid_parser_switch_native_send(uni_hid_device_t* device,
+                                       const uint8_t rumble[8]);
+void uni_hid_parser_switch_native_release(uni_hid_device_t* device);
+#ifdef __cplusplus
+}
+#endif

tests/switch_native_output_native_stubs/uni.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <stdint.h>
+
+struct uni_hid_device_s;
+using uni_hid_device_t = uni_hid_device_s;
+using uni_play_dual_rumble_t = void (*)(uni_hid_device_t*, uint16_t, uint16_t,
+                                       uint8_t, uint8_t);
+
+struct uni_report_parser_t {
+    uni_play_dual_rumble_t play_dual_rumble = nullptr;
+};
+
+// Only the parser boundary is faked. Native sends either enter the byte sink
+// synchronously or fail without retaining a packet; no hidden transmit queue.
+struct uni_hid_device_s {
+    uni_report_parser_t report_parser{};
+    struct { uint16_t interrupt_cid = 0; } conn;
+    bool connected = true;
+    bool info_ready = true;
+    bool acquire_allowed = true;
+    bool native_owned = false;
+    uint8_t controller_type = 3;
+    unsigned acquisitions = 0;
+    unsigned releases = 0;
+};
+