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x11: add --x11-present option

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With the recent addition of the libxpresent, it should improve frame
timings for most users. However, there were known cases of bad behavior
(Nvidia) which lead to a construction of a whitelist instead of just
enabling this all the time. Since there's no way to predict whatever
combination of hardware/drivers/etc. may work correctly, just give users
an option to switch the usage of xorg's presentation statistics on/off.
The default value, auto, works like before (basically, Mesa drivers and
no Nvidia are allowed), but now one can force it on/off if needed.
This commit is contained in:
Dudemanguy 2022-06-19 19:40:20 -05:00
parent d9f7dd7212
commit 24f4582b6f
5 changed files with 27 additions and 3 deletions
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1
DOCS/interface-changes.rst
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@ -42,6 +42,7 @@ Interface changes
- `--sub-visibility` no longer has any effect on secondary subtitles
- add `film-grain` sub-parameter to `format` video filter
- add experimental `--vo=vaapi-wayland` video output driver
- add `--x11-present` for controlling whether to use xorg's present extension
--- mpv 0.34.0 ---
- deprecate selecting by card number with `--drm-connector`, add
`--drm-device` which can be used instead

17
DOCS/man/options.rst
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@ -3354,6 +3354,23 @@ Window
``never`` asks the window manager to never disable the compositor.
``--x11-present=<no|auto|yes>``
Whether or not to use presentation statistics from X11's presentation
extension (default: ``auto``).
mpv asks X11 for present events which it then may use for more accurate
frame presentation. This only has an effect if ``--video-sync=display-...``
is being used.
The auto option enumerates XRandr providers for autodetection. If amd, radeon,
intel, or nouveau (the standard x86 Mesa drivers) is found and nvidia is NOT
found, presentation feedback is enabled. Other drivers are not assumed to
work, so they are not enabled automatically.
``yes`` or ``no`` can still be passed regardless to enable/disable this
mechanism in case there is good/bad behavior with whatever your combination
of hardware/drivers/etc. happens to be.
Disc Devices
------------

3
options/options.c
View File

@ -175,6 +175,8 @@ static const m_option_t mp_vo_opt_list[] = {
{"x11-netwm", OPT_CHOICE(x11_netwm, {"auto", 0}, {"no", -1}, {"yes", 1})},
{"x11-bypass-compositor", OPT_CHOICE(x11_bypass_compositor,
{"no", 0}, {"yes", 1}, {"fs-only", 2}, {"never", 3})},
{"x11-present", OPT_CHOICE(x11_present,
{"no", 0}, {"auto", 1}, {"yes", 2})},
#endif
#if HAVE_WIN32_DESKTOP
{"vo-mmcss-profile", OPT_STRING(mmcss_profile)},
@ -212,6 +214,7 @@ const struct m_sub_options vo_sub_opts = {
.WinID = -1,
.window_scale = 1.0,
.x11_bypass_compositor = 2,
.x11_present = 1,
.mmcss_profile = "Playback",
.ontop_level = -1,
.timing_offset = 0.050,

1
options/options.h
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@ -29,6 +29,7 @@ typedef struct mp_vo_opts {
char *appid;
int x11_netwm;
int x11_bypass_compositor;
int x11_present;
int native_keyrepeat;
float panscan;

8
video/out/x11_common.c
View File

@ -1286,11 +1286,13 @@ void vo_x11_check_events(struct vo *vo)
break;
case GenericEvent: {
XGenericEventCookie *cookie = (XGenericEventCookie *)&Event.xcookie;
if (cookie->extension == x11->present_code && x11->have_present &&
x11->has_mesa && !x11->has_nvidia)
if (cookie->extension == x11->present_code && x11->have_present)
{
int present = x11->opts->x11_present;
bool use_present = (x11->has_mesa && !x11->has_nvidia &&
present) || present == 2;
XGetEventData(x11->display, cookie);
if (cookie->evtype == PresentCompleteNotify) {
if (cookie->evtype == PresentCompleteNotify && use_present) {
XPresentCompleteNotifyEvent *present_event;
present_event = (XPresentCompleteNotifyEvent *)cookie->data;
present_update_sync_values(x11->present, present_event->ust,