153 lines
4.3 KiB
C
153 lines
4.3 KiB
C
/*
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Copyright (C) 2019 by Gary Kramlich <grim@reaperworld.com>
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <fcntl.h>
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#include <linux/videodev2.h>
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#include <libv4l2.h>
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#include "v4l2-controls.h"
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#define blog(level, msg, ...) blog(level, "v4l2-controls: " msg, ##__VA_ARGS__)
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#if defined(__LP64__)
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#define UINT_TO_POINTER(val) ((void *)(unsigned long)(val))
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#define POINTER_TO_UINT(p) ((unsigned int)(unsigned long)(p))
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#else
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#define UINT_TO_POINTER(val) ((void *)(unsigned int)(val))
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#define POINTER_TO_UINT(p) ((unsigned int)(unsigned int)(p))
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#endif
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static bool v4l2_control_changed(void *data, obs_properties_t *props,
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obs_property_t *prop, obs_data_t *settings)
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{
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int dev = v4l2_open(obs_data_get_string(settings, "device_id"),
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O_RDWR | O_NONBLOCK);
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bool ret = false;
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(void)props;
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if (dev == -1)
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return false;
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struct v4l2_control control;
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control.id = POINTER_TO_UINT(data);
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control.value = obs_data_get_int(settings, obs_property_name(prop));
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if (0 != v4l2_ioctl(dev, VIDIOC_S_CTRL, &control)) {
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ret = true;
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}
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v4l2_close(dev);
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return ret;
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}
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static int_fast32_t v4l2_update_controls_menu(int_fast32_t dev,
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obs_properties_t *props,
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struct v4l2_queryctrl *qctrl)
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{
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obs_property_t *prop;
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struct v4l2_querymenu qmenu;
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prop = obs_properties_add_list(props, (char *)qctrl->name,
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(char *)qctrl->name, OBS_COMBO_TYPE_LIST,
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OBS_COMBO_FORMAT_INT);
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obs_property_set_modified_callback2(prop, v4l2_control_changed,
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UINT_TO_POINTER(qctrl->id));
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memset(&qmenu, 0, sizeof(qmenu));
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qmenu.id = qctrl->id;
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for (qmenu.index = qctrl->minimum;
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qmenu.index <= (uint32_t)qctrl->maximum;
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qmenu.index += qctrl->step) {
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if (0 == v4l2_ioctl(dev, VIDIOC_QUERYMENU, &qmenu)) {
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obs_property_list_add_int(prop, (char *)qmenu.name,
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qmenu.value);
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}
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}
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return 0;
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}
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#define INVALID_CONTROL_FLAGS \
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(V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_READ_ONLY | \
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V4L2_CTRL_FLAG_VOLATILE)
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static inline bool valid_control(struct v4l2_queryctrl *qctrl)
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{
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return (qctrl->flags & INVALID_CONTROL_FLAGS) == 0;
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}
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static inline bool add_control_property(obs_properties_t *props,
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obs_data_t *settings, int_fast32_t dev,
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struct v4l2_queryctrl *qctrl)
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{
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obs_property_t *prop = NULL;
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if (!valid_control(qctrl)) {
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return;
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}
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switch (qctrl->type) {
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case V4L2_CTRL_TYPE_INTEGER:
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prop = obs_properties_add_int_slider(
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props, (char *)qctrl->name, (char *)qctrl->name,
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qctrl->minimum, qctrl->maximum, qctrl->step);
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obs_data_set_default_int(settings, (char *)qctrl->name,
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qctrl->default_value);
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obs_property_set_modified_callback2(prop, v4l2_control_changed,
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UINT_TO_POINTER(qctrl->id));
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break;
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case V4L2_CTRL_TYPE_BOOLEAN:
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prop = obs_properties_add_bool(props, (char *)qctrl->name,
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(char *)qctrl->name);
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obs_data_set_default_bool(settings, (char *)qctrl->name,
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qctrl->default_value);
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obs_property_set_modified_callback2(prop, v4l2_control_changed,
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UINT_TO_POINTER(qctrl->id));
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break;
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case V4L2_CTRL_TYPE_MENU:
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case V4L2_CTRL_TYPE_INTEGER_MENU:
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v4l2_update_controls_menu(dev, props, qctrl);
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obs_data_set_default_int(settings, (char *)qctrl->name,
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qctrl->default_value);
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blog(LOG_INFO, "setting default for %s to %d",
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(char *)qctrl->name, qctrl->default_value);
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break;
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}
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}
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int_fast32_t v4l2_update_controls(int_fast32_t dev, obs_properties_t *props,
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obs_data_t *settings)
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{
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struct v4l2_queryctrl qctrl;
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if (!dev || !props)
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return -1;
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memset(&qctrl, 0, sizeof(qctrl));
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qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
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while (0 == v4l2_ioctl(dev, VIDIOC_QUERYCTRL, &qctrl)) {
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add_control_property(props, settings, dev, &qctrl);
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qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
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}
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return 0;
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}
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