input_common: Add camera driver

src/input_common/drivers/camera.cpp

@@ -0,0 +1,82 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <fmt/format.h>
+
+#include "common/param_package.h"
+#include "input_common/drivers/camera.h"
+
+namespace InputCommon {
+constexpr PadIdentifier identifier = {
+    .guid = Common::UUID{},
+    .port = 0,
+    .pad = 0,
+};
+
+Camera::Camera(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    PreSetController(identifier);
+}
+
+void Camera::SetCameraData(std::size_t width, std::size_t height, std::vector<u32> data) {
+    const std::size_t desired_width = getImageWidth();
+    const std::size_t desired_height = getImageHeight();
+    status.data.resize(desired_width * desired_height);
+
+    // Resize image to desired format
+    for (std::size_t y = 0; y < desired_height; y++) {
+        for (std::size_t x = 0; x < desired_width; x++) {
+            const std::size_t pixel_index = y * desired_width + x;
+            const std::size_t old_x = width * x / desired_width;
+            const std::size_t old_y = height * y / desired_height;
+            const std::size_t data_pixel_index = old_y * width + old_x;
+            status.data[pixel_index] = static_cast<u8>(data[data_pixel_index] & 0xFF);
+        }
+    }
+
+    SetCamera(identifier, status);
+}
+
+std::size_t Camera::getImageWidth() const {
+    switch (status.format) {
+    case Common::Input::CameraFormat::Size320x240:
+        return 320;
+    case Common::Input::CameraFormat::Size160x120:
+        return 160;
+    case Common::Input::CameraFormat::Size80x60:
+        return 80;
+    case Common::Input::CameraFormat::Size40x30:
+        return 40;
+    case Common::Input::CameraFormat::Size20x15:
+        return 20;
+    case Common::Input::CameraFormat::None:
+    default:
+        return 0;
+    }
+}
+
+std::size_t Camera::getImageHeight() const {
+    switch (status.format) {
+    case Common::Input::CameraFormat::Size320x240:
+        return 240;
+    case Common::Input::CameraFormat::Size160x120:
+        return 120;
+    case Common::Input::CameraFormat::Size80x60:
+        return 60;
+    case Common::Input::CameraFormat::Size40x30:
+        return 30;
+    case Common::Input::CameraFormat::Size20x15:
+        return 15;
+    case Common::Input::CameraFormat::None:
+    default:
+        return 0;
+    }
+}
+
+Common::Input::CameraError Camera::SetCameraFormat(
+    [[maybe_unused]] const PadIdentifier& identifier_,
+    const Common::Input::CameraFormat camera_format) {
+    status.format = camera_format;
+    return Common::Input::CameraError::None;
+}
+
+} // namespace InputCommon

src/input_common/drivers/camera.h

@@ -0,0 +1,29 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+/**
+ * A button device factory representing a keyboard. It receives keyboard events and forward them
+ * to all button devices it created.
+ */
+class Camera final : public InputEngine {
+public:
+    explicit Camera(std::string input_engine_);
+
+    void SetCameraData(std::size_t width, std::size_t height, std::vector<u32> data);
+
+    std::size_t getImageWidth() const;
+    std::size_t getImageHeight() const;
+
+    Common::Input::CameraError SetCameraFormat(const PadIdentifier& identifier_,
+                                               Common::Input::CameraFormat camera_format) override;
+
+    Common::Input::CameraStatus status{};
+};
+
+} // namespace InputCommon