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// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "core/hle/service/hid/hid.h"
#include "core/arm/arm_interface.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/hle.h"
namespace Service {
namespace HID {
Kernel::SharedPtr<Kernel::SharedMemory> g_shared_mem = nullptr;
Kernel::SharedPtr<Kernel::Event> g_event_pad_or_touch_1;
Kernel::SharedPtr<Kernel::Event> g_event_pad_or_touch_2;
Kernel::SharedPtr<Kernel::Event> g_event_accelerometer;
Kernel::SharedPtr<Kernel::Event> g_event_gyroscope;
Kernel::SharedPtr<Kernel::Event> g_event_debug_pad;
// Next Pad state update information
static PadState next_state = {{0}};
static u32 next_index = 0;
static s16 next_circle_x = 0;
static s16 next_circle_y = 0;
/**
* Gets a pointer to the PadData structure inside HID shared memory
*/
static inline PadData* GetPadData() {
if (g_shared_mem == nullptr)
return nullptr;
return reinterpret_cast<PadData*>(g_shared_mem->GetPointer().ValueOr(nullptr));
}
/**
* Circle Pad from keys.
*
* This is implemented as "pushed all the way to an edge (max) or centered (0)".
*
* Indicate the circle pad is pushed completely to the edge in 1 of 8 directions.
*/
static void UpdateNextCirclePadState() {
static const s16 max_value = 0x9C;
next_circle_x = next_state.circle_left ? -max_value : 0x0;
next_circle_x += next_state.circle_right ? max_value : 0x0;
next_circle_y = next_state.circle_down ? -max_value : 0x0;
next_circle_y += next_state.circle_up ? max_value : 0x0;
}
/**
* Sets a Pad state (button or button combo) as pressed
*/
void PadButtonPress(const PadState& pad_state) {
next_state.hex |= pad_state.hex;
UpdateNextCirclePadState();
}
/**
* Sets a Pad state (button or button combo) as released
*/
void PadButtonRelease(const PadState& pad_state) {
next_state.hex &= ~pad_state.hex;
UpdateNextCirclePadState();
}
/**
* Called after all Pad changes to be included in this update have been made,
* including both Pad key changes and analog circle Pad changes.
*/
void PadUpdateComplete() {
PadData* pad_data = GetPadData();
if (pad_data == nullptr) {
return;
}
// Update PadData struct
pad_data->current_state.hex = next_state.hex;
pad_data->index = next_index;
next_index = (next_index + 1) % pad_data->entries.size();
// Get the previous Pad state
u32 last_entry_index = (pad_data->index - 1) % pad_data->entries.size();
PadState old_state = pad_data->entries[last_entry_index].current_state;
// Compute bitmask with 1s for bits different from the old state
PadState changed;
changed.hex = (next_state.hex ^ old_state.hex);
// Compute what was added
PadState additions;
additions.hex = changed.hex & next_state.hex;
// Compute what was removed
PadState removals;
removals.hex = changed.hex & old_state.hex;
// Get the current Pad entry
PadDataEntry* current_pad_entry = &pad_data->entries[pad_data->index];
// Update entry properties
current_pad_entry->current_state.hex = next_state.hex;
current_pad_entry->delta_additions.hex = additions.hex;
current_pad_entry->delta_removals.hex = removals.hex;
// Set circle Pad
current_pad_entry->circle_pad_x = next_circle_x;
current_pad_entry->circle_pad_y = next_circle_y;
// If we just updated index 0, provide a new timestamp
if (pad_data->index == 0) {
pad_data->index_reset_ticks_previous = pad_data->index_reset_ticks;
pad_data->index_reset_ticks = (s64)Core::g_app_core->GetTicks();
}
// Signal both handles when there's an update to Pad or touch
g_event_pad_or_touch_1->Signal();
g_event_pad_or_touch_2->Signal();
}
void HIDInit() {
using namespace Kernel;
g_shared_mem = SharedMemory::Create("HID:SharedMem");
// Create event handles
g_event_pad_or_touch_1 = Event::Create(RESETTYPE_ONESHOT, "HID:EventPadOrTouch1");
g_event_pad_or_touch_2 = Event::Create(RESETTYPE_ONESHOT, "HID:EventPadOrTouch2");
g_event_accelerometer = Event::Create(RESETTYPE_ONESHOT, "HID:EventAccelerometer");
g_event_gyroscope = Event::Create(RESETTYPE_ONESHOT, "HID:EventGyroscope");
g_event_debug_pad = Event::Create(RESETTYPE_ONESHOT, "HID:EventDebugPad");
}
void HIDShutdown() {
}
}
}
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