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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <atomic>
#include "common/bit_field.h"
#include "core/core_timing.h"
#include "core/frontend/input.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/service/hid/hid.h"
#include "core/hle/service/ir/ir.h"
#include "core/hle/service/ir/ir_rst.h"
#include "core/settings.h"
namespace Service {
namespace IR {
union PadState {
u32_le hex;
BitField<14, 1, u32_le> zl;
BitField<15, 1, u32_le> zr;
BitField<24, 1, u32_le> c_stick_right;
BitField<25, 1, u32_le> c_stick_left;
BitField<26, 1, u32_le> c_stick_up;
BitField<27, 1, u32_le> c_stick_down;
};
struct PadDataEntry {
PadState current_state;
PadState delta_additions;
PadState delta_removals;
s16_le c_stick_x;
s16_le c_stick_y;
};
struct SharedMem {
u64_le index_reset_ticks; ///< CPU tick count for when HID module updated entry index 0
u64_le index_reset_ticks_previous; ///< Previous `index_reset_ticks`
u32_le index;
INSERT_PADDING_WORDS(1);
std::array<PadDataEntry, 8> entries; ///< Last 8 pad entries
};
static_assert(sizeof(SharedMem) == 0x98, "SharedMem has wrong size!");
static Kernel::SharedPtr<Kernel::Event> update_event;
static Kernel::SharedPtr<Kernel::SharedMemory> shared_memory;
static u32 next_pad_index;
static int update_callback_id;
static std::unique_ptr<Input::ButtonDevice> zl_button;
static std::unique_ptr<Input::ButtonDevice> zr_button;
static std::unique_ptr<Input::AnalogDevice> c_stick;
static std::atomic<bool> is_device_reload_pending;
static bool raw_c_stick;
static int update_period;
static void LoadInputDevices() {
zl_button = Input::CreateDevice<Input::ButtonDevice>(
Settings::values.buttons[Settings::NativeButton::ZL]);
zr_button = Input::CreateDevice<Input::ButtonDevice>(
Settings::values.buttons[Settings::NativeButton::ZR]);
c_stick = Input::CreateDevice<Input::AnalogDevice>(
Settings::values.analogs[Settings::NativeAnalog::CStick]);
}
static void UnloadInputDevices() {
zl_button = nullptr;
zr_button = nullptr;
c_stick = nullptr;
}
static void UpdateCallback(u64 userdata, int cycles_late) {
SharedMem* mem = reinterpret_cast<SharedMem*>(shared_memory->GetPointer());
if (is_device_reload_pending.exchange(false))
LoadInputDevices();
PadState state;
state.zl.Assign(zl_button->GetStatus());
state.zr.Assign(zr_button->GetStatus());
// Get current c-stick position and update c-stick direction
float c_stick_x_f, c_stick_y_f;
std::tie(c_stick_x_f, c_stick_y_f) = c_stick->GetStatus();
constexpr int MAX_CSTICK_RADIUS = 0x9C; // Max value for a c-stick radius
const s16 c_stick_x = static_cast<s16>(c_stick_x_f * MAX_CSTICK_RADIUS);
const s16 c_stick_y = static_cast<s16>(c_stick_y_f * MAX_CSTICK_RADIUS);
if (!raw_c_stick) {
const HID::DirectionState direction = HID::GetStickDirectionState(c_stick_x, c_stick_y);
state.c_stick_up.Assign(direction.up);
state.c_stick_down.Assign(direction.down);
state.c_stick_left.Assign(direction.left);
state.c_stick_right.Assign(direction.right);
}
// TODO (wwylele): implement raw C-stick data for raw_c_stick = true
const u32 last_entry_index = mem->index;
mem->index = next_pad_index;
next_pad_index = (next_pad_index + 1) % mem->entries.size();
// Get the previous Pad state
PadState old_state{mem->entries[last_entry_index].current_state};
// Compute bitmask with 1s for bits different from the old state
PadState changed = {state.hex ^ old_state.hex};
// Get the current Pad entry
PadDataEntry& pad_entry = mem->entries[mem->index];
// Update entry properties
pad_entry.current_state.hex = state.hex;
pad_entry.delta_additions.hex = changed.hex & state.hex;
pad_entry.delta_removals.hex = changed.hex & old_state.hex;
pad_entry.c_stick_x = c_stick_x;
pad_entry.c_stick_y = c_stick_y;
// If we just updated index 0, provide a new timestamp
if (mem->index == 0) {
mem->index_reset_ticks_previous = mem->index_reset_ticks;
mem->index_reset_ticks = CoreTiming::GetTicks();
}
update_event->Signal();
// Reschedule recurrent event
CoreTiming::ScheduleEvent(msToCycles(update_period) - cycles_late, update_callback_id);
}
/**
* IR::GetHandles service function
* Outputs:
* 1 : Result of function, 0 on success, otherwise error code
* 2 : Translate header, used by the ARM11-kernel
* 3 : Shared memory handle
* 4 : Event handle
*/
static void GetHandles(Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x01, 0, 0);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 3);
rb.Push(RESULT_SUCCESS);
rb.PushMoveHandles(Kernel::g_handle_table.Create(Service::IR::shared_memory).MoveFrom(),
Kernel::g_handle_table.Create(Service::IR::update_event).MoveFrom());
}
/**
* IR::Initialize service function
* Inputs:
* 1 : pad state update period in ms
* 2 : bool output raw c-stick data
*/
static void Initialize(Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x02, 2, 0);
update_period = static_cast<int>(rp.Pop<u32>());
raw_c_stick = rp.Pop<bool>();
if (raw_c_stick)
LOG_ERROR(Service_IR, "raw C-stick data is not implemented!");
next_pad_index = 0;
is_device_reload_pending.store(true);
CoreTiming::ScheduleEvent(msToCycles(update_period), update_callback_id);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
LOG_DEBUG(Service_IR, "called. update_period=%d, raw_c_stick=%d", update_period, raw_c_stick);
}
static void Shutdown(Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x03, 1, 0);
CoreTiming::UnscheduleEvent(update_callback_id, 0);
UnloadInputDevices();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
LOG_DEBUG(Service_IR, "called");
}
const Interface::FunctionInfo FunctionTable[] = {
{0x00010000, GetHandles, "GetHandles"},
{0x00020080, Initialize, "Initialize"},
{0x00030000, Shutdown, "Shutdown"},
{0x00090000, nullptr, "WriteToTwoFields"},
};
IR_RST_Interface::IR_RST_Interface() {
Register(FunctionTable);
}
void InitRST() {
using namespace Kernel;
// Note: these two kernel objects are even available before Initialize service function is
// called.
shared_memory =
SharedMemory::Create(nullptr, 0x1000, MemoryPermission::ReadWrite, MemoryPermission::Read,
0, MemoryRegion::BASE, "IRRST:SharedMemory");
update_event = Event::Create(ResetType::OneShot, "IRRST:UpdateEvent");
update_callback_id = CoreTiming::RegisterEvent("IRRST:UpdateCallBack", UpdateCallback);
}
void ShutdownRST() {
shared_memory = nullptr;
update_event = nullptr;
UnloadInputDevices();
}
void ReloadInputDevicesRST() {
is_device_reload_pending.store(true);
}
} // namespace IR
} // namespace Service
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