mirror of
https://github.com/mpv-player/mpv.git
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59dd7d94af
Linux and macOS already use nanosecond resolution for their sleep functions. It was just being converted from microseconds before. Since we have mp_time_ns now, go ahead and bump the precision here. The timer for windows uses some timeBeginPeriod thing which I'm not sure what it does really but whatever just convert the units to ms like they were doing before. There's really no reason to keep the mp_sleep_us helper around. A multiplication by 1000 is trivial and underlying OS clocks have nanosecond precision.
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/*
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* based on video_out_null.c from mpeg2dec
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*
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* Copyright (C) Aaron Holtzman - June 2000
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*
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* This file is part of mpv.
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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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#include <stdlib.h>
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#include "common/msg.h"
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#include "vo.h"
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#include "video/mp_image.h"
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#include "osdep/timer.h"
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#include "options/m_option.h"
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struct priv {
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int64_t last_vsync;
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double cfg_fps;
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};
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static void draw_frame(struct vo *vo, struct vo_frame *frame)
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{
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}
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static void flip_page(struct vo *vo)
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{
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struct priv *p = vo->priv;
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if (p->cfg_fps) {
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int64_t ft = 1e9 / p->cfg_fps;
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int64_t prev_vsync = mp_time_ns() / ft;
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int64_t target_time = (prev_vsync + 1) * ft;
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for (;;) {
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int64_t now = mp_time_ns();
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if (now >= target_time)
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break;
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mp_sleep_ns(target_time - now);
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}
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}
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}
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static int query_format(struct vo *vo, int format)
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{
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return 1;
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}
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static int reconfig(struct vo *vo, struct mp_image_params *params)
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{
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return 0;
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}
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static void uninit(struct vo *vo)
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{
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}
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static int preinit(struct vo *vo)
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{
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return 0;
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}
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static int control(struct vo *vo, uint32_t request, void *data)
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{
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struct priv *p = vo->priv;
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switch (request) {
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case VOCTRL_GET_DISPLAY_FPS:
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if (!p->cfg_fps)
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break;
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*(double *)data = p->cfg_fps;
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return VO_TRUE;
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}
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return VO_NOTIMPL;
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}
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#define OPT_BASE_STRUCT struct priv
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const struct vo_driver video_out_null = {
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.description = "Null video output",
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.name = "null",
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.preinit = preinit,
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.query_format = query_format,
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.reconfig = reconfig,
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.control = control,
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.draw_frame = draw_frame,
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.flip_page = flip_page,
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.uninit = uninit,
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.priv_size = sizeof(struct priv),
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.options = (const struct m_option[]) {
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{"fps", OPT_DOUBLE(cfg_fps), M_RANGE(0, 10000)},
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{0},
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},
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.options_prefix = "vo-null",
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};
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