[audio_core/hid] Audio REV12+15 support + HID fixes (#2719)

This fixes newer updates / games.

Implements partial audio rev15, rev13, rev12 and HID issues on SDK20+ games.

Credits to LotP (Ryubing) and Zephyron (Citron) for their research and implementation.

Co-authored-by: Zephyron <zephyron@citron-emu.org>
Co-authored-by: Shinmegumi <shinmegumi@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2719
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: unknown <sahyno1996@gmail.com>
Co-committed-by: unknown <sahyno1996@gmail.com>

3 files changed, 29 insertions, 4 deletions

diff --git a/src/hid_core/resources/npad/npad_types.h b/src/hid_core/resources/npad/npad_types.h
index 92700d69a6..68b803c3d3 100644
--- a/src/hid_core/resources/npad/npad_types.h
+++ b/src/hid_core/resources/npad/npad_types.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -159,6 +162,17 @@ struct NpadGcTriggerState {
 };
 static_assert(sizeof(NpadGcTriggerState) == 0x10, "NpadGcTriggerState is an invalid size");
 
+// This is nn::hid::NpadCondition (global controller condition structure)
+struct NpadCondition {
+    u32 _00{};
+    u32 is_initialized{1};
+    u32 hold_type{static_cast<u32>(NpadJoyHoldType::Horizontal)};
+    u32 is_valid{1};
+};
+static_assert(sizeof(NpadCondition) == 0x10, "NpadCondition is an invalid size");
+
+
+
 // This is nn::hid::NpadSystemProperties
 struct NPadSystemProperties {
     union {
diff --git a/src/hid_core/resources/ring_lifo.h b/src/hid_core/resources/ring_lifo.h
index 0816784e08..55ba2f0e61 100644
--- a/src/hid_core/resources/ring_lifo.h
+++ b/src/hid_core/resources/ring_lifo.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -44,8 +47,7 @@ struct Lifo {
             buffer_count++;
         }
         buffer_tail = GetNextEntryIndex();
-        const auto& previous_entry = ReadPreviousEntry();
-        entries[buffer_tail].sampling_number = previous_entry.sampling_number + 1;
+        entries[buffer_tail].sampling_number = new_state.sampling_number << 1;
         entries[buffer_tail].state = new_state;
     }
 };
diff --git a/src/hid_core/resources/shared_memory_format.h b/src/hid_core/resources/shared_memory_format.h
index 49755c8dc3..b9deeec302 100644
--- a/src/hid_core/resources/shared_memory_format.h
+++ b/src/hid_core/resources/shared_memory_format.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -201,7 +204,9 @@ static_assert(sizeof(ConsoleSixAxisSensorSharedMemoryFormat) == 0x20,
 
 // This is nn::hid::detail::SharedMemoryFormat
 struct SharedMemoryFormat {
-    void Initialize() {}
+    void Initialize() {
+        npad_condition = NpadCondition{};
+    }
 
     DebugPadSharedMemoryFormat debug_pad;
     TouchScreenSharedMemoryFormat touch_screen;
@@ -218,7 +223,9 @@ struct SharedMemoryFormat {
     ConsoleSixAxisSensorSharedMemoryFormat console;
     INSERT_PADDING_BYTES(0x19E0);
     MouseSharedMemoryFormat debug_mouse;
-    INSERT_PADDING_BYTES(0x2000);
+    INSERT_PADDING_BYTES(0x200);
+    NpadCondition npad_condition;
+    INSERT_PADDING_BYTES(0x1DF0);
 };
 static_assert(offsetof(SharedMemoryFormat, debug_pad) == 0x0, "debug_pad has wrong offset");
 static_assert(offsetof(SharedMemoryFormat, touch_screen) == 0x400, "touch_screen has wrong offset");
@@ -236,6 +243,8 @@ static_assert(offsetof(SharedMemoryFormat, npad) == 0x9A00, "npad has wrong offs
 static_assert(offsetof(SharedMemoryFormat, gesture) == 0x3BA00, "gesture has wrong offset");
 static_assert(offsetof(SharedMemoryFormat, console) == 0x3C200, "console has wrong offset");
 static_assert(offsetof(SharedMemoryFormat, debug_mouse) == 0x3DC00, "debug_mouse has wrong offset");
+static_assert(offsetof(SharedMemoryFormat, npad_condition) == 0x3E200,
+              "npad_condition has wrong offset");
 static_assert(sizeof(SharedMemoryFormat) == 0x40000, "SharedMemoryFormat is an invalid size");
 
 } // namespace Service::HID