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Expose options for v4l2

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This commit is contained in:
Kamil Trzcinski 2022-07-08 12:41:08 +02:00
parent 6460d1b902
commit 883a951cea
4 changed files with 59 additions and 0 deletions
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1
device/libcamera/device.cc
View File

@ -56,6 +56,7 @@ void libcamera_device_dump_options(device_t *dev, FILE *stream)
control_id->name().c_str(), control_id->id(), control_id->type(),
control_info.toString().c_str());
}
fprintf(stream, "\n");
}
int libcamera_device_open(device_t *dev)

55
device/v4l2/device_options.c
View File

@ -155,3 +155,58 @@ error:
free(valuep);
return ret;
}
void v4l2_device_dump_options(device_t *dev, FILE *stream)
{
fprintf(stream, "%s Options:\n", dev->name);
for (int i = 0; i < dev->v4l2->ncontrols; i++) {
device_v4l2_control_t *control = &dev->v4l2->controls[i];
fprintf(stream, "- available option: %s (%08x, type=%d): ",
control->control.name, control->control.id, control->control.type);
switch(control->control.type) {
case V4L2_CTRL_TYPE_U8:
case V4L2_CTRL_TYPE_U16:
case V4L2_CTRL_TYPE_U32:
case V4L2_CTRL_TYPE_BOOLEAN:
case V4L2_CTRL_TYPE_INTEGER:
fprintf(stream, "[%lld..%lld]\n", control->control.minimum, control->control.maximum);
break;
case V4L2_CTRL_TYPE_BUTTON:
fprintf(stream, "button\n");
break;
case V4L2_CTRL_TYPE_MENU:
case V4L2_CTRL_TYPE_INTEGER_MENU:
fprintf(stream, "[%lld..%lld]\n", control->control.minimum, control->control.maximum);
for (int j = control->control.minimum; j <= control->control.maximum; j++) {
struct v4l2_querymenu menu = {
.id = control->control.id,
.index = j
};
if (0 == ioctl(control->fd, VIDIOC_QUERYMENU, &menu)) {
if (control->control.type == V4L2_CTRL_TYPE_MENU) {
fprintf(stream, "\t\t%d: %s\n", j, menu.name);
} else {
fprintf(stream, "\t\t%d: %lld\n", j, menu.value);
}
}
}
break;
case V4L2_CTRL_TYPE_STRING:
fprintf(stream, "(string)\n");
break;
default:
fprintf(stream, "(unsupported)\n");
break;
}
}
fprintf(stream, "\n");
}

1
device/v4l2/v4l2.c
View File

@ -6,6 +6,7 @@ device_hw_t v4l2_device_hw = {
.device_close = v4l2_device_close,
.device_set_decoder_start = v4l2_device_set_decoder_start,
.device_video_force_key = v4l2_device_video_force_key,
.device_dump_options = v4l2_device_dump_options,
.device_set_fps = v4l2_device_set_fps,
.device_set_option = v4l2_device_set_option,

2
device/v4l2/v4l2.h
View File

@ -5,6 +5,7 @@
#include <linux/v4l2-subdev.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
typedef struct buffer_s buffer_t;
typedef struct buffer_list_s buffer_list_t;
@ -37,6 +38,7 @@ int v4l2_device_open(device_t *dev);
void v4l2_device_close(device_t *dev);
int v4l2_device_set_decoder_start(device_t *dev, bool do_on);
int v4l2_device_video_force_key(device_t *dev);
void v4l2_device_dump_options(device_t *dev, FILE *stream);
int v4l2_device_set_fps(device_t *dev, int desired_fps);
int v4l2_device_set_option(device_t *dev, const char *key, const char *value);