summaryrefslogtreecommitdiff
path: root/yavta.c
diff options
context:
space:
mode:
Diffstat (limited to 'yavta.c')
-rw-r--r--yavta.c166
1 files changed, 100 insertions, 66 deletions
diff --git a/yavta.c b/yavta.c
index 640b600..a0eb9f5 100644
--- a/yavta.c
+++ b/yavta.c
@@ -394,71 +394,83 @@ static void video_log_status(struct device *dev)
ioctl(dev->fd, VIDIOC_LOG_STATUS);
}
-static unsigned int get_control_type(struct device *dev, unsigned int id)
+static int query_control(struct device *dev, unsigned int id,
+ struct v4l2_queryctrl *query)
{
- struct v4l2_queryctrl query;
int ret;
- memset(&query, 0, sizeof(query));
+ memset(query, 0, sizeof(*query));
+ query->id = id;
- query.id = id;
- ret = ioctl(dev->fd, VIDIOC_QUERYCTRL, &query);
- if (ret == -1)
- return V4L2_CTRL_TYPE_INTEGER;
+ ret = ioctl(dev->fd, VIDIOC_QUERYCTRL, query);
+ if (ret < 0 && errno != EINVAL)
+ printf("unable to query control 0x%8.8x: %s (%d).\n",
+ id, strerror(errno), errno);
- return query.type;
+ return ret;
}
-static int get_control(struct device *dev, unsigned int id, int type,
- int64_t *val)
+static int get_control(struct device *dev, const struct v4l2_queryctrl *query,
+ struct v4l2_ext_control *ctrl)
{
struct v4l2_ext_controls ctrls;
- struct v4l2_ext_control ctrl;
int ret;
memset(&ctrls, 0, sizeof(ctrls));
- memset(&ctrl, 0, sizeof(ctrl));
+ memset(ctrl, 0, sizeof(*ctrl));
- ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(id);
+ ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(query->id);
ctrls.count = 1;
- ctrls.controls = &ctrl;
+ ctrls.controls = ctrl;
- ctrl.id = id;
+ ctrl->id = query->id;
+
+ if (query->type == V4L2_CTRL_TYPE_STRING) {
+ ctrl->string = malloc(query->maximum + 1);
+ if (ctrl->string == NULL)
+ return -ENOMEM;
+
+ ctrl->size = query->maximum + 1;
+ }
ret = ioctl(dev->fd, VIDIOC_G_EXT_CTRLS, &ctrls);
- if (ret != -1) {
- if (type == V4L2_CTRL_TYPE_INTEGER64)
- *val = ctrl.value64;
- else
- *val = ctrl.value;
+ if (ret != -1)
return 0;
- }
- if (type != V4L2_CTRL_TYPE_INTEGER64 && type != V4L2_CTRL_TYPE_STRING &&
+
+ if (query->type != V4L2_CTRL_TYPE_INTEGER64 &&
+ query->type != V4L2_CTRL_TYPE_STRING &&
(errno == EINVAL || errno == ENOTTY)) {
struct v4l2_control old;
- old.id = id;
+ old.id = query->id;
ret = ioctl(dev->fd, VIDIOC_G_CTRL, &old);
if (ret != -1) {
- *val = old.value;
+ ctrl->value = old.value;
return 0;
}
}
printf("unable to get control 0x%8.8x: %s (%d).\n",
- id, strerror(errno), errno);
+ query->id, strerror(errno), errno);
return -1;
}
-static void set_control(struct device *dev, unsigned int id, int type,
+static void set_control(struct device *dev, unsigned int id,
int64_t val)
{
struct v4l2_ext_controls ctrls;
struct v4l2_ext_control ctrl;
- int is_64 = type == V4L2_CTRL_TYPE_INTEGER64;
+ struct v4l2_queryctrl query;
int64_t old_val = val;
+ int is_64;
int ret;
+ ret = query_control(dev, id, &query);
+ if (ret < 0)
+ return;
+
+ is_64 = query.type == V4L2_CTRL_TYPE_INTEGER64;
+
memset(&ctrls, 0, sizeof(ctrls));
memset(&ctrl, 0, sizeof(ctrl));
@@ -478,7 +490,7 @@ static void set_control(struct device *dev, unsigned int id, int type,
val = ctrl.value64;
else
val = ctrl.value;
- } else if (!is_64 && type != V4L2_CTRL_TYPE_STRING &&
+ } else if (!is_64 && query.type != V4L2_CTRL_TYPE_STRING &&
(errno == EINVAL || errno == ENOTTY)) {
struct v4l2_control old;
@@ -1022,50 +1034,78 @@ static void video_query_menu(struct device *dev, struct v4l2_queryctrl *query,
};
}
-static void video_list_controls(struct device *dev)
+static int video_print_control(struct device *dev, unsigned int id, bool full)
{
+ struct v4l2_ext_control ctrl;
struct v4l2_queryctrl query;
+ char sval[24];
+ char *current = sval;
+ int ret;
+
+ ret = query_control(dev, id, &query);
+ if (ret < 0)
+ return ret;
+
+ if (query.flags & V4L2_CTRL_FLAG_DISABLED)
+ return query.id;
+
+ if (query.type == V4L2_CTRL_TYPE_CTRL_CLASS) {
+ printf("--- %s (class 0x%08x) ---\n", query.name, query.id);
+ return query.id;
+ }
+
+ ret = get_control(dev, &query, &ctrl);
+ if (ret < 0)
+ strcpy(sval, "n/a");
+ else if (query.type == V4L2_CTRL_TYPE_INTEGER64)
+ sprintf(sval, "%lld", ctrl.value64);
+ else if (query.type == V4L2_CTRL_TYPE_STRING)
+ current = ctrl.string;
+ else
+ sprintf(sval, "%d", ctrl.value);
+
+ if (full)
+ printf("control 0x%08x `%s' min %d max %d step %d default %d current %s.\n",
+ query.id, query.name, query.minimum, query.maximum,
+ query.step, query.default_value, current);
+ else
+ printf("control 0x%08x current %s.\n", query.id, current);
+
+ if (query.type == V4L2_CTRL_TYPE_STRING)
+ free(ctrl.string);
+
+ if (!full)
+ return query.id;
+
+ if (query.type == V4L2_CTRL_TYPE_MENU ||
+ query.type == V4L2_CTRL_TYPE_INTEGER_MENU)
+ video_query_menu(dev, &query, ctrl.value);
+
+ return query.id;
+}
+
+static void video_list_controls(struct device *dev)
+{
unsigned int nctrls = 0;
- char value[24];
- int64_t val64;
+ unsigned int id;
int ret;
#ifndef V4L2_CTRL_FLAG_NEXT_CTRL
unsigned int i;
for (i = V4L2_CID_BASE; i <= V4L2_CID_LASTP1; ++i) {
- query.id = i;
+ id = i;
#else
- query.id = 0;
+ id = 0;
while (1) {
- query.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
+ id |= V4L2_CTRL_FLAG_NEXT_CTRL;
#endif
- ret = ioctl(dev->fd, VIDIOC_QUERYCTRL, &query);
- if (ret < 0)
- break;
-
- if (query.flags & V4L2_CTRL_FLAG_DISABLED)
- continue;
-
- if (query.type == V4L2_CTRL_TYPE_CTRL_CLASS) {
- printf("--- %s (class 0x%08x) ---\n", query.name, query.id);
- continue;
- }
- ret = get_control(dev, query.id, query.type, &val64);
+ ret = video_print_control(dev, id, true);
if (ret < 0)
- strcpy(value, "n/a");
- else
- sprintf(value, "%" PRId64, val64);
-
- printf("control 0x%08x `%s' min %d max %d step %d default %d current %s.\n",
- query.id, query.name, query.minimum, query.maximum,
- query.step, query.default_value, value);
-
- if (query.type == V4L2_CTRL_TYPE_MENU ||
- query.type == V4L2_CTRL_TYPE_INTEGER_MENU)
- video_query_menu(dev, &query, val64);
+ break;
+ id = ret;
nctrls++;
}
@@ -1968,17 +2008,11 @@ int main(int argc, char *argv[])
if (do_log_status)
video_log_status(&dev);
- if (do_get_control) {
- int64_t val;
- ret = get_control(&dev, ctrl_name,
- get_control_type(&dev, ctrl_name), &val);
- if (ret >= 0)
- printf("Control 0x%08x value %" PRId64 "\n", ctrl_name, val);
- }
+ if (do_get_control)
+ video_print_control(&dev, ctrl_name, false);
if (do_set_control)
- set_control(&dev, ctrl_name, get_control_type(&dev, ctrl_name),
- ctrl_value);
+ set_control(&dev, ctrl_name, ctrl_value);
if (do_list_controls)
video_list_controls(&dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 07:43:58 +0000