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