1 files changed, 149 insertions, 0 deletions
diff --git a/src/hid_core/irsensor/moment_processor.cpp b/src/hid_core/irsensor/moment_processor.cpp
new file mode 100644
index 000000000..0284a58bd
--- /dev/null
+++ b/src/hid_core/irsensor/moment_processor.cpp
@@ -0,0 +1,149 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "core/core.h"
+#include "core/core_timing.h"
+#include "hid_core/frontend/emulated_controller.h"
+#include "hid_core/hid_core.h"
+#include "hid_core/irsensor/moment_processor.h"
+
+namespace Service::IRS {
+static constexpr auto format = Core::IrSensor::ImageTransferProcessorFormat::Size40x30;
+static constexpr std::size_t ImageWidth = 40;
+static constexpr std::size_t ImageHeight = 30;
+
+MomentProcessor::MomentProcessor(Core::System& system_, Core::IrSensor::DeviceFormat& device_format,
+                                 std::size_t npad_index)
+    : device(device_format), system{system_} {
+    npad_device = system.HIDCore().GetEmulatedControllerByIndex(npad_index);
+
+    device.mode = Core::IrSensor::IrSensorMode::MomentProcessor;
+    device.camera_status = Core::IrSensor::IrCameraStatus::Unconnected;
+    device.camera_internal_status = Core::IrSensor::IrCameraInternalStatus::Stopped;
+
+    shared_memory = std::construct_at(
+        reinterpret_cast<MomentSharedMemory*>(&device_format.state.processor_raw_data));
+
+    Core::HID::ControllerUpdateCallback engine_callback{
+        .on_change = [this](Core::HID::ControllerTriggerType type) { OnControllerUpdate(type); },
+        .is_npad_service = true,
+    };
+    callback_key = npad_device->SetCallback(engine_callback);
+}
+
+MomentProcessor::~MomentProcessor() {
+    npad_device->DeleteCallback(callback_key);
+};
+
+void MomentProcessor::StartProcessor() {
+    device.camera_status = Core::IrSensor::IrCameraStatus::Available;
+    device.camera_internal_status = Core::IrSensor::IrCameraInternalStatus::Ready;
+}
+
+void MomentProcessor::SuspendProcessor() {}
+
+void MomentProcessor::StopProcessor() {}
+
+void MomentProcessor::OnControllerUpdate(Core::HID::ControllerTriggerType type) {
+    if (type != Core::HID::ControllerTriggerType::IrSensor) {
+        return;
+    }
+
+    next_state = {};
+    const auto& camera_data = npad_device->GetCamera();
+
+    const auto window_width = static_cast<std::size_t>(current_config.window_of_interest.width);
+    const auto window_height = static_cast<std::size_t>(current_config.window_of_interest.height);
+    const auto window_start_x = static_cast<std::size_t>(current_config.window_of_interest.x);
+    const auto window_start_y = static_cast<std::size_t>(current_config.window_of_interest.y);
+
+    const std::size_t block_width = window_width / Columns;
+    const std::size_t block_height = window_height / Rows;
+
+    for (std::size_t row = 0; row < Rows; row++) {
+        for (std::size_t column = 0; column < Columns; column++) {
+            const size_t x_pos = (column * block_width) + window_start_x;
+            const size_t y_pos = (row * block_height) + window_start_y;
+            auto& statistic = next_state.statistic[column + (row * Columns)];
+            statistic = GetStatistic(camera_data.data, x_pos, y_pos, block_width, block_height);
+        }
+    }
+
+    next_state.sampling_number = camera_data.sample;
+    next_state.timestamp = system.CoreTiming().GetGlobalTimeNs().count();
+    next_state.ambient_noise_level = Core::IrSensor::CameraAmbientNoiseLevel::Low;
+    shared_memory->moment_lifo.WriteNextEntry(next_state);
+
+    if (!IsProcessorActive()) {
+        StartProcessor();
+    }
+}
+
+u8 MomentProcessor::GetPixel(const std::vector<u8>& data, std::size_t x, std::size_t y) const {
+    if ((y * ImageWidth) + x >= data.size()) {
+        return 0;
+    }
+    return data[(y * ImageWidth) + x];
+}
+
+MomentProcessor::MomentStatistic MomentProcessor::GetStatistic(const std::vector<u8>& data,
+                                                               std::size_t start_x,
+                                                               std::size_t start_y,
+                                                               std::size_t width,
+                                                               std::size_t height) const {
+    // The actual implementation is always 320x240
+    static constexpr std::size_t RealWidth = 320;
+    static constexpr std::size_t RealHeight = 240;
+    static constexpr std::size_t Threshold = 30;
+    MomentStatistic statistic{};
+    std::size_t active_points{};
+
+    // Sum all data points on the block that meet with the threshold
+    for (std::size_t y = 0; y < width; y++) {
+        for (std::size_t x = 0; x < height; x++) {
+            const size_t x_pos = x + start_x;
+            const size_t y_pos = y + start_y;
+            const auto pixel =
+                GetPixel(data, x_pos * ImageWidth / RealWidth, y_pos * ImageHeight / RealHeight);
+
+            if (pixel < Threshold) {
+                continue;
+            }
+
+            statistic.average_intensity += pixel;
+
+            statistic.centroid.x += static_cast<float>(x_pos);
+            statistic.centroid.y += static_cast<float>(y_pos);
+
+            active_points++;
+        }
+    }
+
+    // Return an empty field if no points were available
+    if (active_points == 0) {
+        return {};
+    }
+
+    // Finally calculate the actual centroid and average intensity
+    statistic.centroid.x /= static_cast<float>(active_points);
+    statistic.centroid.y /= static_cast<float>(active_points);
+    statistic.average_intensity /= static_cast<f32>(width * height);
+
+    return statistic;
+}
+
+void MomentProcessor::SetConfig(Core::IrSensor::PackedMomentProcessorConfig config) {
+    current_config.camera_config.exposure_time = config.camera_config.exposure_time;
+    current_config.camera_config.gain = config.camera_config.gain;
+    current_config.camera_config.is_negative_used = config.camera_config.is_negative_used;
+    current_config.camera_config.light_target =
+        static_cast<Core::IrSensor::CameraLightTarget>(config.camera_config.light_target);
+    current_config.window_of_interest = config.window_of_interest;
+    current_config.preprocess =
+        static_cast<Core::IrSensor::MomentProcessorPreprocess>(config.preprocess);
+    current_config.preprocess_intensity_threshold = config.preprocess_intensity_threshold;
+
+    npad_device->SetCameraFormat(format);
+}
+
+} // namespace Service::IRS