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[media] v4l2-ctrls: add support for compound types

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This patch implements initial support for compound types.

The changes are fairly obvious: basic support for is_ptr types, the
type_is_int function is replaced by a is_int bitfield, and
v4l2_query_ext_ctrl is added.

Note that this patch does not yet add support for N-dimensional
arrays, that comes later. So v4l2_query_ext_ctrl just sets elems to
1 and nr_of_dims and dims[] are all zero.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil 2014-06-12 07:54:16 -03:00 committed by Mauro Carvalho Chehab
parent 5082c24178
commit d9a2547150
2 changed files with 194 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

224
drivers/media/v4l2-core/v4l2-ctrls.c
View File

@ -1124,20 +1124,6 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
}
EXPORT_SYMBOL(v4l2_ctrl_fill);
/* Helper function to determine whether the control type is compatible with
VIDIOC_G/S_CTRL. */
static bool type_is_int(const struct v4l2_ctrl *ctrl)
{
switch (ctrl->type) {
case V4L2_CTRL_TYPE_INTEGER64:
case V4L2_CTRL_TYPE_STRING:
/* Nope, these need v4l2_ext_control */
return false;
default:
return true;
}
}
static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
{
memset(ev->reserved, 0, sizeof(ev->reserved));
@ -1146,7 +1132,7 @@ static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 change
ev->u.ctrl.changes = changes;
ev->u.ctrl.type = ctrl->type;
ev->u.ctrl.flags = ctrl->flags;
if (ctrl->type == V4L2_CTRL_TYPE_STRING)
if (ctrl->is_ptr)
ev->u.ctrl.value64 = 0;
else
ev->u.ctrl.value64 = ctrl->cur.val64;
@ -1181,6 +1167,9 @@ static int cur_to_user(struct v4l2_ext_control *c,
{
u32 len;
if (ctrl->is_ptr && !ctrl->is_string)
return copy_to_user(c->ptr, ctrl->cur.p, ctrl->elem_size);
switch (ctrl->type) {
case V4L2_CTRL_TYPE_STRING:
len = strlen(ctrl->cur.string);
@ -1208,6 +1197,9 @@ static int user_to_new(struct v4l2_ext_control *c,
u32 size;
ctrl->is_new = 1;
if (ctrl->is_ptr && !ctrl->is_string)
return copy_from_user(ctrl->p, c->ptr, ctrl->elem_size);
switch (ctrl->type) {
case V4L2_CTRL_TYPE_INTEGER64:
ctrl->val64 = c->value64;
@ -1242,6 +1234,9 @@ static int new_to_user(struct v4l2_ext_control *c,
{
u32 len;
if (ctrl->is_ptr && !ctrl->is_string)
return copy_to_user(c->ptr, ctrl->p, ctrl->elem_size);
switch (ctrl->type) {
case V4L2_CTRL_TYPE_STRING:
len = strlen(ctrl->string);
@ -1268,6 +1263,7 @@ static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
if (ctrl == NULL)
return;
switch (ctrl->type) {
case V4L2_CTRL_TYPE_BUTTON:
changed = true;
@ -1282,8 +1278,13 @@ static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
ctrl->cur.val64 = ctrl->val64;
break;
default:
changed = ctrl->val != ctrl->cur.val;
ctrl->cur.val = ctrl->val;
if (ctrl->is_ptr) {
changed = memcmp(ctrl->p, ctrl->cur.p, ctrl->elem_size);
memcpy(ctrl->cur.p, ctrl->p, ctrl->elem_size);
} else {
changed = ctrl->val != ctrl->cur.val;
ctrl->cur.val = ctrl->val;
}
break;
}
if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
@ -1323,7 +1324,10 @@ static void cur_to_new(struct v4l2_ctrl *ctrl)
ctrl->val64 = ctrl->cur.val64;
break;
default:
ctrl->val = ctrl->cur.val;
if (ctrl->is_ptr)
memcpy(ctrl->p, ctrl->cur.p, ctrl->elem_size);
else
ctrl->val = ctrl->cur.val;
break;
}
}
@ -1536,7 +1540,7 @@ static struct v4l2_ctrl_ref *find_private_ref(
VIDIOC_G/S_CTRL. */
if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
if (!type_is_int(ref->ctrl))
if (!ref->ctrl->is_int)
continue;
if (id == 0)
return ref;
@ -1606,8 +1610,12 @@ static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
/* Automatically add the control class if it is not yet present. */
if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
/*
* Automatically add the control class if it is not yet present and
* the new control is not a compound control.
*/
if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
return hdl->error;
@ -1668,18 +1676,28 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
const struct v4l2_ctrl_ops *ops,
u32 id, const char *name, enum v4l2_ctrl_type type,
s64 min, s64 max, u64 step, s64 def,
u32 elem_size,
u32 flags, const char * const *qmenu,
const s64 *qmenu_int, void *priv)
{
struct v4l2_ctrl *ctrl;
unsigned sz_extra = 0;
unsigned sz_extra;
void *data;
int err;
if (hdl->error)
return NULL;
if (type == V4L2_CTRL_TYPE_INTEGER64)
elem_size = sizeof(s64);
else if (type == V4L2_CTRL_TYPE_STRING)
elem_size = max + 1;
else if (type < V4L2_CTRL_COMPOUND_TYPES)
elem_size = sizeof(s32);
/* Sanity checks */
if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
elem_size == 0 ||
(type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
(type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
handler_set_err(hdl, -ERANGE);
@ -1695,12 +1713,13 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
return NULL;
}
sz_extra = 0;
if (type == V4L2_CTRL_TYPE_BUTTON)
flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
flags |= V4L2_CTRL_FLAG_READ_ONLY;
else if (type == V4L2_CTRL_TYPE_STRING)
sz_extra += 2 * (max + 1);
else if (type == V4L2_CTRL_TYPE_STRING || type >= V4L2_CTRL_COMPOUND_TYPES)
sz_extra += 2 * elem_size;
ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
if (ctrl == NULL) {
@ -1719,18 +1738,28 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
ctrl->minimum = min;
ctrl->maximum = max;
ctrl->step = step;
ctrl->default_value = def;
ctrl->is_string = type == V4L2_CTRL_TYPE_STRING;
ctrl->is_ptr = type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
ctrl->elem_size = elem_size;
if (type == V4L2_CTRL_TYPE_MENU)
ctrl->qmenu = qmenu;
else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
ctrl->qmenu_int = qmenu_int;
ctrl->priv = priv;
ctrl->cur.val = ctrl->val = ctrl->default_value = def;
ctrl->cur.val = ctrl->val = def;
data = &ctrl->cur + 1;
if (ctrl->is_string) {
ctrl->string = data;
ctrl->cur.string = data + elem_size;
if (ctrl->type == V4L2_CTRL_TYPE_STRING) {
ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1);
ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1);
if (ctrl->minimum)
memset(ctrl->cur.string, ' ', ctrl->minimum);
} else if (ctrl->is_ptr) {
ctrl->p = data;
ctrl->cur.p = data + elem_size;
}
if (handler_new_ref(hdl, ctrl)) {
kfree(ctrl);
@ -1778,7 +1807,8 @@ struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
type, min, max,
is_menu ? cfg->menu_skip_mask : step,
def, flags, qmenu, qmenu_int, priv);
def, cfg->elem_size,
flags, qmenu, qmenu_int, priv);
if (ctrl)
ctrl->is_private = cfg->is_private;
return ctrl;
@ -1795,13 +1825,15 @@ struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
u32 flags;
v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
if (type == V4L2_CTRL_TYPE_MENU
|| type == V4L2_CTRL_TYPE_INTEGER_MENU) {
if (type == V4L2_CTRL_TYPE_MENU ||
type == V4L2_CTRL_TYPE_INTEGER_MENU ||
type >= V4L2_CTRL_COMPOUND_TYPES) {
handler_set_err(hdl, -EINVAL);
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, type,
min, max, step, def, flags, NULL, NULL, NULL);
min, max, step, def, 0,
flags, NULL, NULL, NULL);
}
EXPORT_SYMBOL(v4l2_ctrl_new_std);
@ -1833,7 +1865,8 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, type,
0, max, mask, def, flags, qmenu, qmenu_int, NULL);
0, max, mask, def, 0,
flags, qmenu, qmenu_int, NULL);
}
EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
@ -1864,7 +1897,7 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, type, 0, max, mask, def,
flags, qmenu, NULL, NULL);
0, flags, qmenu, NULL, NULL);
}
EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
@ -1888,7 +1921,8 @@ struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, type,
0, max, 0, def, flags, NULL, qmenu_int, NULL);
0, max, 0, def, 0,
flags, NULL, qmenu_int, NULL);
}
EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
@ -2177,9 +2211,10 @@ int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
}
EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
/* Implement VIDIOC_QUERYCTRL */
int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
/* Implement VIDIOC_QUERY_EXT_CTRL */
int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
{
const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
u32 id = qc->id & V4L2_CTRL_ID_MASK;
struct v4l2_ctrl_ref *ref;
struct v4l2_ctrl *ctrl;
@ -2192,7 +2227,20 @@ int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
/* Try to find it */
ref = find_ref(hdl, id);
if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) {
if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
bool is_compound;
/* Match any control that is not hidden */
unsigned mask = 1;
bool match = false;
if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
/* Match any hidden control */
match = true;
} else if ((qc->id & next_flags) == next_flags) {
/* Match any control, compound or not */
mask = 0;
}
/* Find the next control with ID > qc->id */
/* Did we reach the end of the control list? */
@ -2200,19 +2248,34 @@ int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
ref = NULL; /* Yes, so there is no next control */
} else if (ref) {
/* We found a control with the given ID, so just get
the next one in the list. */
ref = list_entry(ref->node.next, typeof(*ref), node);
the next valid one in the list. */
list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
is_compound =
ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
if (id < ref->ctrl->id &&
(is_compound & mask) == match)
break;
}
if (&ref->node == &hdl->ctrl_refs)
ref = NULL;
} else {
/* No control with the given ID exists, so start
searching for the next largest ID. We know there
is one, otherwise the first 'if' above would have
been true. */
list_for_each_entry(ref, &hdl->ctrl_refs, node)
if (id < ref->ctrl->id)
list_for_each_entry(ref, &hdl->ctrl_refs, node) {
is_compound =
ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
if (id < ref->ctrl->id &&
(is_compound & mask) == match)
break;
}
if (&ref->node == &hdl->ctrl_refs)
ref = NULL;
}
}
mutex_unlock(hdl->lock);
if (!ref)
return -EINVAL;
@ -2223,6 +2286,12 @@ int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
else
qc->id = ctrl->id;
strlcpy(qc->name, ctrl->name, sizeof(qc->name));
qc->flags = ctrl->flags;
qc->type = ctrl->type;
if (ctrl->is_ptr)
qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
qc->elem_size = ctrl->elem_size;
qc->elems = 1;
qc->minimum = ctrl->minimum;
qc->maximum = ctrl->maximum;
qc->default_value = ctrl->default_value;
@ -2231,15 +2300,50 @@ int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
qc->step = 1;
else
qc->step = ctrl->step;
qc->flags = ctrl->flags;
qc->type = ctrl->type;
return 0;
}
EXPORT_SYMBOL(v4l2_query_ext_ctrl);
/* Implement VIDIOC_QUERYCTRL */
int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
{
struct v4l2_query_ext_ctrl qec = { qc->id };
int rc;
rc = v4l2_query_ext_ctrl(hdl, &qec);
if (rc)
return rc;
qc->id = qec.id;
qc->type = qec.type;
qc->flags = qec.flags;
strlcpy(qc->name, qec.name, sizeof(qc->name));
switch (qc->type) {
case V4L2_CTRL_TYPE_INTEGER:
case V4L2_CTRL_TYPE_BOOLEAN:
case V4L2_CTRL_TYPE_MENU:
case V4L2_CTRL_TYPE_INTEGER_MENU:
case V4L2_CTRL_TYPE_STRING:
case V4L2_CTRL_TYPE_BITMASK:
qc->minimum = qec.minimum;
qc->maximum = qec.maximum;
qc->step = qec.step;
qc->default_value = qec.default_value;
break;
default:
qc->minimum = 0;
qc->maximum = 0;
qc->step = 0;
qc->default_value = 0;
break;
}
return 0;
}
EXPORT_SYMBOL(v4l2_queryctrl);
int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL)
if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
return -EINVAL;
return v4l2_queryctrl(sd->ctrl_handler, qc);
}
@ -2339,7 +2443,8 @@ EXPORT_SYMBOL(v4l2_subdev_querymenu);
Find the controls in the control array and do some basic checks. */
static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
struct v4l2_ext_controls *cs,
struct v4l2_ctrl_helper *helpers)
struct v4l2_ctrl_helper *helpers,
bool get)
{
struct v4l2_ctrl_helper *h;
bool have_clusters = false;
@ -2371,6 +2476,13 @@ static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
have_clusters = true;
if (ctrl->cluster[0] != ctrl)
ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
if (ctrl->is_ptr && !ctrl->is_string && c->size < ctrl->elem_size) {
if (get) {
c->size = ctrl->elem_size;
return -ENOSPC;
}
return -EFAULT;
}
/* Store the ref to the master control of the cluster */
h->mref = ref;
h->ctrl = ctrl;
@ -2451,7 +2563,7 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs
return -ENOMEM;
}
ret = prepare_ext_ctrls(hdl, cs, helpers);
ret = prepare_ext_ctrls(hdl, cs, helpers, true);
cs->error_idx = cs->count;
for (i = 0; !ret && i < cs->count; i++)
@ -2513,11 +2625,11 @@ static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
int ret = 0;
int i;
/* String controls are not supported. The new_to_user() and
/* Compound controls are not supported. The new_to_user() and
* cur_to_user() calls below would need to be modified not to access
* userspace memory when called from get_ctrl().
*/
if (ctrl->type == V4L2_CTRL_TYPE_STRING)
if (!ctrl->is_int)
return -EINVAL;
if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
@ -2543,7 +2655,7 @@ int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
struct v4l2_ext_control c;
int ret;
if (ctrl == NULL || !type_is_int(ctrl))
if (ctrl == NULL || !ctrl->is_int)
return -EINVAL;
ret = get_ctrl(ctrl, &c);
control->value = c.value;
@ -2562,7 +2674,7 @@ s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
struct v4l2_ext_control c;
/* It's a driver bug if this happens. */
WARN_ON(!type_is_int(ctrl));
WARN_ON(!ctrl->is_int);
c.value = 0;
get_ctrl(ctrl, &c);
return c.value;
@ -2698,7 +2810,7 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
if (!helpers)
return -ENOMEM;
}
ret = prepare_ext_ctrls(hdl, cs, helpers);
ret = prepare_ext_ctrls(hdl, cs, helpers, false);
if (!ret)
ret = validate_ctrls(cs, helpers, set);
if (ret && set)
@ -2803,11 +2915,11 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
struct v4l2_ctrl *master = ctrl->cluster[0];
int i;
/* String controls are not supported. The user_to_new() and
/* Compound controls are not supported. The user_to_new() and
* cur_to_user() calls below would need to be modified not to access
* userspace memory when called from set_ctrl().
*/
if (ctrl->type == V4L2_CTRL_TYPE_STRING)
if (ctrl->is_ptr)
return -EINVAL;
/* Reset the 'is_new' flags of the cluster */
@ -2849,7 +2961,7 @@ int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
struct v4l2_ext_control c;
int ret;
if (ctrl == NULL || !type_is_int(ctrl))
if (ctrl == NULL || !ctrl->is_int)
return -EINVAL;
if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
@ -2873,7 +2985,7 @@ int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
struct v4l2_ext_control c;
/* It's a driver bug if this happens. */
WARN_ON(!type_is_int(ctrl));
WARN_ON(!ctrl->is_int);
c.value = val;
return set_ctrl_lock(NULL, ctrl, &c);
}

37
include/media/v4l2-ctrls.h
View File

@ -73,6 +73,12 @@ typedef void (*v4l2_ctrl_notify_fnc)(struct v4l2_ctrl *ctrl, void *priv);
* members are in 'automatic' mode or 'manual' mode. This is
* used for autogain/gain type clusters. Drivers should never
* set this flag directly.
* @is_int: If set, then this control has a simple integer value (i.e. it
* uses ctrl->val).
* @is_string: If set, then this control has type V4L2_CTRL_TYPE_STRING.
* @is_ptr: If set, then this control is an array and/or has type >= V4L2_CTRL_COMPOUND_TYPES
* and/or has type V4L2_CTRL_TYPE_STRING. In other words, struct
* v4l2_ext_control uses field p to point to the data.
* @has_volatiles: If set, then one or more members of the cluster are volatile.
* Drivers should never touch this flag.
* @call_notify: If set, then call the handler's notify function whenever the
@ -90,6 +96,7 @@ typedef void (*v4l2_ctrl_notify_fnc)(struct v4l2_ctrl *ctrl, void *priv);
* @maximum: The control's maximum value.
* @default_value: The control's default value.
* @step: The control's step value for non-menu controls.
* @elem_size: The size in bytes of the control.
* @menu_skip_mask: The control's skip mask for menu controls. This makes it
* easy to skip menu items that are not valid. If bit X is set,
* then menu item X is skipped. Of course, this only works for
@ -104,7 +111,6 @@ typedef void (*v4l2_ctrl_notify_fnc)(struct v4l2_ctrl *ctrl, void *priv);
* @cur: The control's current value.
* @val: The control's new s32 value.
* @val64: The control's new s64 value.
* @string: The control's new string value.
* @priv: The control's private pointer. For use by the driver. It is
* untouched by the control framework. Note that this pointer is
* not freed when the control is deleted. Should this be needed
@ -123,6 +129,9 @@ struct v4l2_ctrl {
unsigned int is_new:1;
unsigned int is_private:1;
unsigned int is_auto:1;
unsigned int is_int:1;
unsigned int is_string:1;
unsigned int is_ptr:1;
unsigned int has_volatiles:1;
unsigned int call_notify:1;
unsigned int manual_mode_value:8;
@ -132,6 +141,7 @@ struct v4l2_ctrl {
const char *name;
enum v4l2_ctrl_type type;
s64 minimum, maximum, default_value;
u32 elem_size;
union {
u64 step;
u64 menu_skip_mask;
@ -141,17 +151,19 @@ struct v4l2_ctrl {
const s64 *qmenu_int;
};
unsigned long flags;
union {
s32 val;
s64 val64;
char *string;
} cur;
union {
s32 val;
s64 val64;
char *string;
};
void *priv;
union {
s32 val;
s64 val64;
char *string;
void *p;
};
union {
s32 val;
s64 val64;
char *string;
void *p;
} cur;
};
/** struct v4l2_ctrl_ref - The control reference.
@ -212,6 +224,7 @@ struct v4l2_ctrl_handler {
* @max: The control's maximum value.
* @step: The control's step value for non-menu controls.
* @def: The control's default value.
* @elem_size: The size in bytes of the control.
* @flags: The control's flags.
* @menu_skip_mask: The control's skip mask for menu controls. This makes it
* easy to skip menu items that are not valid. If bit X is set,
@ -235,6 +248,7 @@ struct v4l2_ctrl_config {
s64 max;
u64 step;
s64 def;
u32 elem_size;
u32 flags;
u64 menu_skip_mask;
const char * const *qmenu;
@ -659,6 +673,7 @@ unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait);
/* Helpers for ioctl_ops. If hdl == NULL then they will all return -EINVAL. */
int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc);
int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc);
int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm);
int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *ctrl);
int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,