Add webcam support

include/Config.hpp

@@ -61,6 +61,14 @@ namespace gsr {
         bool record_cursor = true;
         bool restore_portal_session = true;
 
+        std::string webcam_source = "";
+        bool webcam_flip_horizontally = false;
+        std::string webcam_video_format = "auto";
+        int32_t webcam_x = 0; // A value between 0 and 100 (percentage)
+        int32_t webcam_y = 0; // A value between 0 and 100 (percentage)
+        int32_t webcam_width = 30; // A value between 0 and 100 (percentage), 0 = Don't scale it
+        int32_t webcam_height = 30; // A value between 0 and 100 (percentage), 0 = Don't scale it
+
         bool show_notifications = true;
         bool use_led_indicator = false;
     };

include/GsrInfo.hpp

@@ -25,11 +25,22 @@ namespace gsr {
         bool png = false;
     };
 
+    struct SupportedCameraPixelFormats {
+        bool yuyv = false;
+        bool mjpeg = false;
+    };
+
     struct GsrMonitor {
         std::string name;
         mgl::vec2i size;
     };
 
+    struct GsrCamera {
+        std::string path;
+        mgl::vec2i size;
+        SupportedCameraPixelFormats supported_pixel_formats;
+    };
+
     struct GsrVersion {
         uint8_t major = 0;
         uint8_t minor = 0;
@@ -51,6 +62,7 @@ namespace gsr {
         bool focused = false;
         bool portal = false;
         std::vector<GsrMonitor> monitors;
+        std::vector<GsrCamera> cameras;
     };
 
     enum class DisplayServer {
@@ -103,4 +115,5 @@ namespace gsr {
     std::vector<AudioDevice> get_audio_devices();
     std::vector<std::string> get_application_audio();
     SupportedCaptureOptions get_supported_capture_options(const GsrInfo &gsr_info);
+    std::vector<GsrCamera> get_v4l2_devices();
 }

include/Theme.hpp

@@ -24,6 +24,7 @@ namespace gsr {
         mgl::Font body_font;
         mgl::Font title_font;
         mgl::Font top_bar_font;
+        mgl::Font camera_setup_font;
 
         mgl::Texture combobox_arrow_texture;
         mgl::Texture settings_texture;

include/gui/ComboBox.hpp

@@ -19,6 +19,8 @@ namespace gsr {
         void draw(mgl::Window &window, mgl::vec2f offset) override;
 
         void add_item(const std::string &text, const std::string &id);
+        void clear_items();
+
         // The item can only be selected if it's enabled
         void set_selected_item(const std::string &id, bool trigger_event = true, bool trigger_event_even_if_selection_not_changed = true);
         void set_item_enabled(const std::string &id, bool enabled);

include/gui/SettingsPage.hpp

@@ -25,6 +25,14 @@ namespace gsr {
         INPUT
     };
 
+    enum class WebcamBoxResizeCorner {
+        NONE,
+        //TOP_LEFT,
+        //TOP_RIGHT,
+        //BOTTOM_LEFT,
+        BOTTOM_RIGHT
+    };
+
     class SettingsPage : public StaticPage {
     public:
         enum class Type {
@@ -58,6 +66,9 @@ namespace gsr {
         std::unique_ptr<List> create_restore_portal_session_section();
         std::unique_ptr<Widget> create_change_video_resolution_section();
         std::unique_ptr<Widget> create_capture_target_section();
+        std::unique_ptr<List> create_webcam_sources();
+        std::unique_ptr<List> create_webcam_video_format();
+        std::unique_ptr<Widget> create_webcam_section();
         std::unique_ptr<ComboBox> create_audio_device_selection_combobox(AudioDeviceType device_type);
         std::unique_ptr<Button> create_remove_audio_device_button(List *audio_input_list_ptr, List *audio_device_list_ptr);
         std::unique_ptr<List> create_audio_device(AudioDeviceType device_type, List *audio_input_list_ptr);
@@ -140,6 +151,8 @@ namespace gsr {
         void save_stream();
 
         void view_changed(bool advanced_view);
+
+        RecordOptions& get_current_record_options();
     private:
         Type type;
         Config &config;
@@ -197,7 +210,29 @@ namespace gsr {
         List *audio_track_section_list_ptr = nullptr;
         CheckBox *led_indicator_checkbox_ptr = nullptr;
         CheckBox *show_notification_checkbox_ptr = nullptr;
+        ComboBox *webcam_sources_box_ptr = nullptr;
+        ComboBox *webcam_video_format_box_ptr = nullptr;
+        List *webcam_body_list_ptr = nullptr;
+        CheckBox *flip_camera_horizontally_checkbox_ptr = nullptr;
 
         PageStack *page_stack = nullptr;
+
+        mgl::vec2f webcam_box_pos;
+        mgl::vec2f webcam_box_size;
+
+        mgl::vec2f webcam_box_drawn_pos;
+        mgl::vec2f webcam_box_drawn_size;
+        mgl::vec2f webcam_box_grab_offset;
+
+        mgl::vec2f camera_screen_size;
+        mgl::vec2f screen_inner_size;
+        bool moving_webcam_box = false;
+
+        WebcamBoxResizeCorner webcam_resize_corner = WebcamBoxResizeCorner::NONE;
+        mgl::vec2f webcam_resize_start_pos;
+        mgl::vec2f webcam_box_pos_resize_start;
+        mgl::vec2f webcam_box_size_resize_start;
+
+        std::optional<GsrCamera> selected_camera;
     };
 }

include/gui/Utils.hpp

@@ -9,6 +9,10 @@ namespace mgl {
 }
 
 namespace gsr {
+    mgl::vec2i min_vec2i(mgl::vec2i a, mgl::vec2i b);
+    mgl::vec2i max_vec2i(mgl::vec2i a, mgl::vec2i b);
+    mgl::vec2i clamp_vec2i(mgl::vec2i value, mgl::vec2i min, mgl::vec2i max);
+
     // Inner border
     void draw_rectangle_outline(mgl::Window &window, mgl::vec2f pos, mgl::vec2f size, mgl::Color color, float border_size);
     double get_frame_delta_seconds();