xdg-desktop-portal-hyprland/include/screencast_common.h

#ifndef SCREENCAST_COMMON_H
#define SCREENCAST_COMMON_H

#include <gbm.h>
#include <pipewire/pipewire.h>
#include <spa/param/video/format-utils.h>
#include <wayland-client-protocol.h>
#include <xf86drm.h>

#include "fps_limit.h"
#include "hyprland-toplevel-export-v1-client-protocol.h"

// this seems to be right based on
// https://github.com/flatpak/xdg-desktop-portal/blob/309a1fc0cf2fb32cceb91dbc666d20cf0a3202c2/src/screen-cast.c#L955
#define XDP_CAST_PROTO_VER 2

enum cursor_modes {
    HIDDEN = 1,
    EMBEDDED = 2,
    METADATA = 4,
};

enum source_types {
    MONITOR = 1,
    WINDOW = 2,
};

enum buffer_type {
    WL_SHM = 0,
    DMABUF = 1,
};

enum xdpw_chooser_types {
    XDPW_CHOOSER_DEFAULT,
    XDPW_CHOOSER_NONE,
    XDPW_CHOOSER_SIMPLE,
    XDPW_CHOOSER_DMENU,
};

enum xdpw_frame_state {
    XDPW_FRAME_STATE_NONE,
    XDPW_FRAME_STATE_STARTED,
    XDPW_FRAME_STATE_RENEG,
    XDPW_FRAME_STATE_FAILED,
    XDPW_FRAME_STATE_SUCCESS,
};

struct xdpw_output_chooser {
    enum xdpw_chooser_types type;
    char *cmd;
};

struct xdpw_frame_damage {
    uint32_t x;
    uint32_t y;
    uint32_t width;
    uint32_t height;
};

struct xdpw_frame {
    bool y_invert;
    uint64_t tv_sec;
    uint32_t tv_nsec;
    struct xdpw_frame_damage damage;
    struct xdpw_buffer *xdpw_buffer;
    struct pw_buffer *pw_buffer;
};

struct xdpw_screencopy_frame_info {
    uint32_t width;
    uint32_t height;
    uint32_t size;
    uint32_t stride;
    uint32_t format;
};

struct xdpw_buffer {
    struct wl_list link;
    enum buffer_type buffer_type;

    uint32_t width;
    uint32_t height;
    uint32_t format;
    int plane_count;

    int fd[4];
    uint32_t size[4];
    uint32_t stride[4];
    uint32_t offset[4];

    struct gbm_bo *bo;

    struct wl_buffer *buffer;
};

struct xdpw_format_modifier_pair {
    uint32_t fourcc;
    uint64_t modifier;
};

struct xdpw_dmabuf_feedback_data {
    void *format_table_data;
    uint32_t format_table_size;
    bool device_used;
};

struct xdpw_screencast_context {
    // xdpw
    struct xdpw_state *state;

    // pipewire
    struct pw_context *pwr_context;
    struct pw_core *core;

    // wlroots
    struct wl_list output_list;
    struct wl_registry *registry;
    struct zwlr_screencopy_manager_v1 *screencopy_manager;
    struct zxdg_output_manager_v1 *xdg_output_manager;
    struct wl_shm *shm;
    struct zwp_linux_dmabuf_v1 *linux_dmabuf;
    struct zwp_linux_dmabuf_feedback_v1 *linux_dmabuf_feedback;
    struct xdpw_dmabuf_feedback_data feedback_data;
    struct wl_array format_modifier_pairs;

    // hyprland
    struct hyprland_toplevel_export_manager_v1 *hyprland_toplevel_manager;
    struct zwlr_foreign_toplevel_manager_v1 *wlroots_toplevel_manager;
    struct wl_list toplevel_resource_list;

    // gbm
    struct gbm_device *gbm;

    // sessions
    struct wl_list screencast_instances;
};

struct xdpw_wlr_output {
    struct wl_list link;
    uint32_t id;
    struct wl_output *output;
    struct zxdg_output_v1 *xdg_output;
    char *make;
    char *model;
    char *name;
    int width;
    int height;
    float framerate;
};

struct xdpw_share {
    struct xdpw_wlr_output *output;
    int x;
    int y;
    int w;
    int h;
    int window_handle;
};

struct xdpw_screencast_instance {
    // list
    struct wl_list link;

    // xdpw
    uint32_t refcount;
    struct xdpw_screencast_context *ctx;
    bool initialized;
    struct xdpw_frame current_frame;
    enum xdpw_frame_state frame_state;
    struct wl_list buffer_list;
    bool avoid_dmabufs;

    // pipewire
    struct pw_stream *stream;
    struct spa_hook stream_listener;
    struct spa_video_info_raw pwr_format;
    uint32_t seq;
    uint32_t node_id;
    bool pwr_stream_state;
    uint32_t framerate;

    // wlroots
    struct zwlr_screencopy_frame_v1 *frame_callback;
    struct xdpw_share target;
    uint32_t max_framerate;
    struct zwlr_screencopy_frame_v1 *wlr_frame;
    struct xdpw_screencopy_frame_info screencopy_frame_info[2];
    bool with_cursor;
    int err;
    bool quit;
    bool teardown;
    enum buffer_type buffer_type;

    // hyprland
    struct hyprland_toplevel_export_frame_v1 *frame_callback_hyprland;
    struct hyprland_toplevel_export_frame_v1 *hyprland_frame;

    // fps limit
    struct fps_limit_state fps_limit;
};

void randname(char *buf);
struct gbm_device *xdpw_gbm_device_create(drmDevice *device);
struct xdpw_buffer *xdpw_buffer_create(struct xdpw_screencast_instance *cast,
                                       enum buffer_type buffer_type, struct xdpw_screencopy_frame_info *frame_info);
void xdpw_buffer_destroy(struct xdpw_buffer *buffer);
bool wlr_query_dmabuf_modifiers(struct xdpw_screencast_context *ctx, uint32_t drm_format,
                                uint32_t num_modifiers, uint64_t *modifiers, uint32_t *max_modifiers);
enum wl_shm_format xdpw_format_wl_shm_from_drm_fourcc(uint32_t format);
uint32_t xdpw_format_drm_fourcc_from_wl_shm(enum wl_shm_format format);
enum spa_video_format xdpw_format_pw_from_drm_fourcc(uint32_t format);
enum spa_video_format xdpw_format_pw_strip_alpha(enum spa_video_format format);

enum xdpw_chooser_types get_chooser_type(const char *chooser_type);
const char *chooser_type_str(enum xdpw_chooser_types chooser_type);
#endif /* SCREENCAST_COMMON_H */