service/hid: Use ring buffer for gestures
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85052b8662
commit
95cf66b655
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@ -31,7 +31,8 @@ Controller_Gesture::Controller_Gesture(Core::System& system_) : ControllerBase(s
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Controller_Gesture::~Controller_Gesture() = default;
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void Controller_Gesture::OnInit() {
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shared_memory.header.entry_count = 0;
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gesture_lifo.entry_count = 0;
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gesture_lifo.last_entry_index = 0;
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force_update = true;
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}
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@ -39,27 +40,25 @@ void Controller_Gesture::OnRelease() {}
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void Controller_Gesture::OnUpdate(const Core::Timing::CoreTiming& core_timing, u8* data,
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std::size_t size) {
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shared_memory.header.timestamp = core_timing.GetCPUTicks();
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shared_memory.header.total_entry_count = 17;
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if (!IsControllerActivated()) {
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shared_memory.header.entry_count = 0;
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shared_memory.header.last_entry_index = 0;
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gesture_lifo.entry_count = 0;
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gesture_lifo.last_entry_index = 0;
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std::memcpy(data, &gesture_lifo, sizeof(gesture_lifo));
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return;
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}
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ReadTouchInput();
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GestureProperties gesture = GetGestureProperties();
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f32 time_difference = static_cast<f32>(shared_memory.header.timestamp - last_update_timestamp) /
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(1000 * 1000 * 1000);
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f32 time_difference =
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static_cast<f32>(gesture_lifo.timestamp - last_update_timestamp) / (1000 * 1000 * 1000);
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// Only update if necesary
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if (!ShouldUpdateGesture(gesture, time_difference)) {
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return;
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}
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last_update_timestamp = shared_memory.header.timestamp;
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last_update_timestamp = gesture_lifo.timestamp;
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UpdateGestureSharedMemory(data, size, gesture, time_difference);
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}
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@ -75,7 +74,7 @@ void Controller_Gesture::ReadTouchInput() {
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bool Controller_Gesture::ShouldUpdateGesture(const GestureProperties& gesture,
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f32 time_difference) {
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const auto& last_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
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const auto& last_entry = GetLastGestureEntry();
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if (force_update) {
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force_update = false;
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return true;
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@ -103,24 +102,16 @@ void Controller_Gesture::UpdateGestureSharedMemory(u8* data, std::size_t size,
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GestureType type = GestureType::Idle;
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GestureAttribute attributes{};
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const auto& last_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
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shared_memory.header.last_entry_index = (shared_memory.header.last_entry_index + 1) % 17;
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auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
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const auto& last_entry = gesture_lifo.ReadCurrentEntry().state;
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if (shared_memory.header.entry_count < 16) {
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shared_memory.header.entry_count++;
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}
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cur_entry.sampling_number = last_entry.sampling_number + 1;
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cur_entry.sampling_number2 = cur_entry.sampling_number;
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// Reset values to default
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cur_entry.delta = {};
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cur_entry.vel_x = 0;
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cur_entry.vel_y = 0;
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cur_entry.direction = GestureDirection::None;
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cur_entry.rotation_angle = 0;
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cur_entry.scale = 0;
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// Reset next state to default
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next_state.sampling_number = last_entry.sampling_number + 1;
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next_state.delta = {};
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next_state.vel_x = 0;
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next_state.vel_y = 0;
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next_state.direction = GestureDirection::None;
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next_state.rotation_angle = 0;
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next_state.scale = 0;
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if (gesture.active_points > 0) {
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if (last_gesture.active_points == 0) {
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@ -133,15 +124,16 @@ void Controller_Gesture::UpdateGestureSharedMemory(u8* data, std::size_t size,
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}
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// Apply attributes
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cur_entry.detection_count = gesture.detection_count;
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cur_entry.type = type;
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cur_entry.attributes = attributes;
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cur_entry.pos = gesture.mid_point;
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cur_entry.point_count = static_cast<s32>(gesture.active_points);
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cur_entry.points = gesture.points;
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next_state.detection_count = gesture.detection_count;
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next_state.type = type;
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next_state.attributes = attributes;
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next_state.pos = gesture.mid_point;
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next_state.point_count = static_cast<s32>(gesture.active_points);
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next_state.points = gesture.points;
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last_gesture = gesture;
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std::memcpy(data + SHARED_MEMORY_OFFSET, &shared_memory, sizeof(SharedMemory));
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gesture_lifo.WriteNextEntry(next_state);
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std::memcpy(data + SHARED_MEMORY_OFFSET, &gesture_lifo, sizeof(gesture_lifo));
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}
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void Controller_Gesture::NewGesture(GestureProperties& gesture, GestureType& type,
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@ -245,19 +237,18 @@ void Controller_Gesture::SetTapEvent(GestureProperties& gesture,
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void Controller_Gesture::UpdatePanEvent(GestureProperties& gesture,
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GestureProperties& last_gesture_props, GestureType& type,
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f32 time_difference) {
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auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
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const auto& last_entry = GetLastGestureEntry();
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cur_entry.delta = gesture.mid_point - last_entry.pos;
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cur_entry.vel_x = static_cast<f32>(cur_entry.delta.x) / time_difference;
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cur_entry.vel_y = static_cast<f32>(cur_entry.delta.y) / time_difference;
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next_state.delta = gesture.mid_point - last_entry.pos;
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next_state.vel_x = static_cast<f32>(next_state.delta.x) / time_difference;
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next_state.vel_y = static_cast<f32>(next_state.delta.y) / time_difference;
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last_pan_time_difference = time_difference;
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// Promote to pinch type
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if (std::abs(gesture.average_distance - last_gesture_props.average_distance) >
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pinch_threshold) {
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type = GestureType::Pinch;
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cur_entry.scale = gesture.average_distance / last_gesture_props.average_distance;
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next_state.scale = gesture.average_distance / last_gesture_props.average_distance;
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}
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const f32 angle_between_two_lines = std::atan((gesture.angle - last_gesture_props.angle) /
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@ -265,22 +256,21 @@ void Controller_Gesture::UpdatePanEvent(GestureProperties& gesture,
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// Promote to rotate type
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if (std::abs(angle_between_two_lines) > angle_threshold) {
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type = GestureType::Rotate;
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cur_entry.scale = 0;
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cur_entry.rotation_angle = angle_between_two_lines * 180.0f / Common::PI;
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next_state.scale = 0;
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next_state.rotation_angle = angle_between_two_lines * 180.0f / Common::PI;
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}
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}
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void Controller_Gesture::EndPanEvent(GestureProperties& gesture,
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GestureProperties& last_gesture_props, GestureType& type,
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f32 time_difference) {
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auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
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const auto& last_entry = GetLastGestureEntry();
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cur_entry.vel_x =
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next_state.vel_x =
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static_cast<f32>(last_entry.delta.x) / (last_pan_time_difference + time_difference);
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cur_entry.vel_y =
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next_state.vel_y =
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static_cast<f32>(last_entry.delta.y) / (last_pan_time_difference + time_difference);
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const f32 curr_vel =
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std::sqrt((cur_entry.vel_x * cur_entry.vel_x) + (cur_entry.vel_y * cur_entry.vel_y));
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std::sqrt((next_state.vel_x * next_state.vel_x) + (next_state.vel_y * next_state.vel_y));
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// Set swipe event with parameters
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if (curr_vel > swipe_threshold) {
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@ -290,42 +280,37 @@ void Controller_Gesture::EndPanEvent(GestureProperties& gesture,
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// End panning without swipe
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type = GestureType::Complete;
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cur_entry.vel_x = 0;
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cur_entry.vel_y = 0;
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next_state.vel_x = 0;
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next_state.vel_y = 0;
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force_update = true;
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}
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void Controller_Gesture::SetSwipeEvent(GestureProperties& gesture,
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GestureProperties& last_gesture_props, GestureType& type) {
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auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
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const auto& last_entry = GetLastGestureEntry();
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type = GestureType::Swipe;
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gesture = last_gesture_props;
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force_update = true;
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cur_entry.delta = last_entry.delta;
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next_state.delta = last_entry.delta;
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if (std::abs(cur_entry.delta.x) > std::abs(cur_entry.delta.y)) {
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if (cur_entry.delta.x > 0) {
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cur_entry.direction = GestureDirection::Right;
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if (std::abs(next_state.delta.x) > std::abs(next_state.delta.y)) {
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if (next_state.delta.x > 0) {
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next_state.direction = GestureDirection::Right;
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return;
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}
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cur_entry.direction = GestureDirection::Left;
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next_state.direction = GestureDirection::Left;
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return;
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}
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if (cur_entry.delta.y > 0) {
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cur_entry.direction = GestureDirection::Down;
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if (next_state.delta.y > 0) {
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next_state.direction = GestureDirection::Down;
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return;
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}
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cur_entry.direction = GestureDirection::Up;
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}
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Controller_Gesture::GestureState& Controller_Gesture::GetLastGestureEntry() {
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return shared_memory.gesture_states[(shared_memory.header.last_entry_index + 16) % 17];
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next_state.direction = GestureDirection::Up;
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}
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const Controller_Gesture::GestureState& Controller_Gesture::GetLastGestureEntry() const {
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return shared_memory.gesture_states[(shared_memory.header.last_entry_index + 16) % 17];
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return gesture_lifo.ReadCurrentEntry().state;
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}
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Controller_Gesture::GestureProperties Controller_Gesture::GetGestureProperties() {
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@ -71,7 +71,6 @@ private:
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// This is nn::hid::GestureState
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struct GestureState {
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s64_le sampling_number;
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s64_le sampling_number2;
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s64_le detection_count;
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GestureType type;
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GestureDirection direction;
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@ -85,21 +84,7 @@ private:
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s32_le point_count;
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std::array<Common::Point<s32_le>, 4> points;
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};
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static_assert(sizeof(GestureState) == 0x68, "GestureState is an invalid size");
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struct CommonHeader {
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s64_le timestamp;
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s64_le total_entry_count;
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s64_le last_entry_index;
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s64_le entry_count;
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};
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static_assert(sizeof(CommonHeader) == 0x20, "CommonHeader is an invalid size");
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struct SharedMemory {
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CommonHeader header;
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std::array<GestureState, 17> gesture_states;
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};
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static_assert(sizeof(SharedMemory) == 0x708, "SharedMemory is an invalid size");
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static_assert(sizeof(GestureState) == 0x60, "GestureState is an invalid size");
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struct Finger {
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Common::Point<f32> pos{};
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@ -153,13 +138,16 @@ private:
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GestureType& type);
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// Retrieves the last gesture entry, as indicated by shared memory indices.
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[[nodiscard]] GestureState& GetLastGestureEntry();
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[[nodiscard]] const GestureState& GetLastGestureEntry() const;
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// Returns the average distance, angle and middle point of the active fingers
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GestureProperties GetGestureProperties();
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SharedMemory shared_memory{};
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// This is nn::hid::detail::GestureLifo
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Lifo<GestureState> gesture_lifo{};
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static_assert(sizeof(gesture_lifo) == 0x708, "gesture_lifo is an invalid size");
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GestureState next_state{};
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Core::HID::EmulatedConsole* console;
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std::array<Finger, MAX_POINTS> fingers{};
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