mirror of
https://github.com/mpv-player/mpv
synced 2025-01-08 08:00:17 +00:00
ea4685b233
The old way of using wayland in mpv relied on an external renderloop for semi-accurate timings. This had multiple issues though. Display sync would break whenever the window was hidden (since the frame callback stopped being executed) which was really annoying. Also the entire external renderloop logic was kind of fragile and didn't play well with mpv's internal structure (i.e. using presentation time in that old paradigm breaks stats.lua). Basically the problem is that swap buffers blocks on wayland which is crap whenever you hide the mpv window since it looks up the entire player. So you have to make swap buffers not block, but this has a different problem. Timings will be terrible if you use the unblocked swap buffers call. Based on some discussion in #wayland, the trick here is relatively simple and works well enough for our purposes. Instead we basically build a way to block with a timeout in the wayland buffer swap functions. A bool is set in the frame callback function that indicates whether or not mpv is waiting for a frame to be displayed. In the actual buffer swap function, we enter into a while loop waiting for this flag to be set. At the same time, the wl_display is polled to block the thread and wakeup if it receives any events from the compositor. This loop only breaks if enough time has passed or if the frame callback bool is received. In the near future, it is better to set whether or not frame a frame has been displayed in the presentation feedback. However as a first pass, doing it in the frame callback is more than good enough. The "downside" is that we render frames that aren't actually shown on screen when the player is hidden (it seems like wayland people don't like that). But who cares. Accurate timings are way more important. It's probably not too hard to add that behavior back in the player though.
119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/*
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* This file is part of mpv video player.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MPLAYER_WAYLAND_COMMON_H
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#define MPLAYER_WAYLAND_COMMON_H
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#include <wayland-client.h>
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#include <wayland-cursor.h>
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#include <xkbcommon/xkbcommon.h>
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#include "vo.h"
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#include "input/event.h"
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struct vo_wayland_output {
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struct vo_wayland_state *wl;
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uint32_t id;
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struct wl_output *output;
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struct mp_rect geometry;
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int phys_width;
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int phys_height;
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int scale;
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uint32_t flags;
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double refresh_rate;
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char *make;
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char *model;
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bool has_surface;
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struct wl_list link;
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};
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struct vo_wayland_state {
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struct mp_log *log;
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struct vo *vo;
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struct wl_display *display;
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struct wl_shm *shm;
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struct wl_compositor *compositor;
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struct wl_registry *registry;
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/* State */
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struct mp_rect geometry;
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struct mp_rect window_size;
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float aspect_ratio;
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bool fullscreen;
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bool maximized;
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bool configured;
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bool callback_wait;
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int wakeup_pipe[2];
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int pending_vo_events;
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int mouse_x;
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int mouse_y;
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int scaling;
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int touch_entries;
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uint32_t pointer_id;
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int display_fd;
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struct wl_callback *frame_callback;
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struct wl_list output_list;
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struct vo_wayland_output *current_output;
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/* Shell */
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struct wl_surface *surface;
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struct xdg_wm_base *wm_base;
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struct xdg_toplevel *xdg_toplevel;
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struct xdg_surface *xdg_surface;
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struct zxdg_decoration_manager_v1 *xdg_decoration_manager;
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struct zxdg_toplevel_decoration_v1 *xdg_toplevel_decoration;
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struct zwp_idle_inhibit_manager_v1 *idle_inhibit_manager;
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struct zwp_idle_inhibitor_v1 *idle_inhibitor;
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/* Input */
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struct wl_seat *seat;
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struct wl_pointer *pointer;
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struct wl_touch *touch;
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struct wl_keyboard *keyboard;
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struct xkb_context *xkb_context;
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struct xkb_keymap *xkb_keymap;
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struct xkb_state *xkb_state;
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/* DND */
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struct wl_data_device_manager *dnd_devman;
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struct wl_data_device *dnd_ddev;
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struct wl_data_offer *dnd_offer;
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enum mp_dnd_action dnd_action;
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char *dnd_mime_type;
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int dnd_mime_score;
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int dnd_fd;
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/* Cursor */
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struct wl_cursor_theme *cursor_theme;
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struct wl_cursor *default_cursor;
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struct wl_surface *cursor_surface;
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int allocated_cursor_scale;
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bool cursor_visible;
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bool prev_fullscreen;
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};
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int vo_wayland_init(struct vo *vo);
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int vo_wayland_reconfig(struct vo *vo);
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int vo_wayland_control(struct vo *vo, int *events, int request, void *arg);
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void vo_wayland_check_events(struct vo *vo);
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void vo_wayland_uninit(struct vo *vo);
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void vo_wayland_wakeup(struct vo *vo);
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void vo_wayland_wait_events(struct vo *vo, int64_t until_time_us);
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void vo_wayland_wait_frame(struct vo_wayland_state *wl);
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#endif /* MPLAYER_WAYLAND_COMMON_H */
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