mirror of https://github.com/mpv-player/mpv
106 lines
2.5 KiB
C
106 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* 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_image(struct vo *vo, mp_image_t *mpi)
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{
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talloc_free(mpi);
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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 = 1e6 / p->cfg_fps;
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int64_t prev_vsync = mp_time_us() / 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_us();
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if (now >= target_time)
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break;
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mp_sleep_us(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_image = draw_image,
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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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OPT_DOUBLE("fps", cfg_fps, M_OPT_RANGE, .min = 0, .max = 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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