From: Hans Verkuil <hans.verk...@cisco.com>
This patch implements initial support for simple properties.
For the most part 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), but one change needs more explanation:
The v4l2_ctrl struct adds a 'new' field and a 'stores' array at the end
of the struct. This is in preparation for following patches where each control
can have multiple configuration stores. The idea is that stores[0] is the
current
control value, stores[1] etc. are the control values for each configuration
store
and the 'new' value can be accessed through 'stores[-1]', i.e. the 'new' field.
These new fields use the v4l2_ctrl_ptr union, which is a pointer to a control
value.
Note that these two new fields are not yet actually used.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/v4l2-core/v4l2-ctrls.c | 231 ++++++++++++++++++++++++++---------
include/media/v4l2-ctrls.h | 38 +++++-
2 files changed, 206 insertions(+), 63 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c
b/drivers/media/v4l2-core/v4l2-ctrls.c
index 10bfab6..3927755 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1081,20 +1081,6 @@ void v4l2_ctrl_fill(u32 id, const char **name, const
char **unit,
}
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));
@@ -1103,7 +1089,7 @@ 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;
@@ -1138,6 +1124,9 @@ static int cur_to_user(struct v4l2_ext_control *c,
{
u32 len;
+ if (ctrl->is_ptr && !ctrl->is_string)
+ return copy_to_user(c->p, ctrl->cur.p, ctrl->elem_size);
+
switch (ctrl->type) {
case V4L2_CTRL_TYPE_STRING:
len = strlen(ctrl->cur.string);
@@ -1165,6 +1154,9 @@ 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->p, ctrl->elem_size);
+
switch (ctrl->type) {
case V4L2_CTRL_TYPE_INTEGER64:
ctrl->val64 = c->value64;
@@ -1199,6 +1191,9 @@ static int new_to_user(struct v4l2_ext_control *c,
{
u32 len;
+ if (ctrl->is_ptr && !ctrl->is_string)
+ return copy_to_user(c->p, ctrl->p, ctrl->elem_size);
+
switch (ctrl->type) {
case V4L2_CTRL_TYPE_STRING:
len = strlen(ctrl->string);
@@ -1225,6 +1220,7 @@ 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;
@@ -1239,8 +1235,13 @@ 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) {
@@ -1280,7 +1281,10 @@ 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;
}
}
@@ -1493,7 +1497,7 @@ 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;
@@ -1626,23 +1630,46 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
v4l2_ctrl_handler *hdl,
u32 id, const char *name, const char *unit,
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 *props;
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_PROP_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);
return NULL;
}
+ /*
+ * No properties are allowed in the USER class due to backwards
+ * compatibility with old applications.
+ */
+ if (V4L2_CTRL_ID2CLASS(id) == V4L2_CTRL_CLASS_USER &&
+ (flags & V4L2_CTRL_FLAG_PROPERTY)) {
+ handler_set_err(hdl, -EINVAL);
+ return NULL;
+ }
+ if (!(flags & V4L2_CTRL_FLAG_PROPERTY) && type >= V4L2_PROP_TYPES) {
+ handler_set_err(hdl, -EINVAL);
+ return NULL;
+ }
err = check_range(type, min, max, step, def);
if (err) {
handler_set_err(hdl, err);
@@ -1653,12 +1680,13 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct
v4l2_ctrl_handler *hdl,
return NULL;
}
+ sz_extra = sizeof(union v4l2_ctrl_ptr);
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_PROP_TYPES)
+ sz_extra += 2 * elem_size;
ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
if (ctrl == NULL) {
@@ -1678,18 +1706,31 @@ 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_PROP_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;
+ props = &ctrl->stores[1];
+
+ if (ctrl->is_string) {
+ ctrl->string = ctrl->new.p_char = props;
+ ctrl->stores[0].p_char = props + 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 = ctrl->new.p = props;
+ ctrl->stores[0].p = props + elem_size;
+ } else {
+ ctrl->new.p = &ctrl->val;
+ ctrl->stores[0].p = &ctrl->cur.val;
}
if (handler_new_ref(hdl, ctrl)) {
kfree(ctrl);
@@ -1738,7 +1779,8 @@ struct v4l2_ctrl *v4l2_ctrl_new_custom(struct
v4l2_ctrl_handler *hdl,
ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name, unit,
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;
@@ -1756,13 +1798,15 @@ struct v4l2_ctrl *v4l2_ctrl_new_std(struct
v4l2_ctrl_handler *hdl,
u32 flags;
v4l2_ctrl_fill(id, &name, &unit, &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_PROP_TYPES) {
handler_set_err(hdl, -EINVAL);
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, unit, type,
- min, max, step, def, flags, NULL, NULL, NULL);
+ min, max, step, def, 0,
+ flags, NULL, NULL, NULL);
}
EXPORT_SYMBOL(v4l2_ctrl_new_std);
@@ -1795,7 +1839,8 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct
v4l2_ctrl_handler *hdl,
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, unit, 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);
@@ -1827,7 +1872,7 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct
v4l2_ctrl_handler *hdl,
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, unit, type, 0, max, mask, def,
- flags, qmenu, NULL, NULL);
+ 0, flags, qmenu, NULL, NULL);
}
EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
@@ -1852,7 +1897,8 @@ struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct
v4l2_ctrl_handler *hdl,
return NULL;
}
return v4l2_ctrl_new(hdl, ops, id, name, unit, 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);
@@ -2140,14 +2186,16 @@ 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_PROP;
u32 id = qc->id & V4L2_CTRL_ID_MASK;
+ unsigned store = qc->config_store;
struct v4l2_ctrl_ref *ref;
struct v4l2_ctrl *ctrl;
- if (hdl == NULL)
+ if (hdl == NULL || store)
return -EINVAL;
mutex_lock(hdl->lock);
@@ -2155,7 +2203,15 @@ 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)) {
+ unsigned mask = V4L2_CTRL_FLAG_PROPERTY;
+ unsigned match = 0;
+
+ if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_PROP)
+ match = mask;
+ if ((qc->id & next_flags) == next_flags)
+ mask = 0;
+
/* Find the next control with ID > qc->id */
/* Did we reach the end of the control list? */
@@ -2163,19 +2219,28 @@ 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)
+ if (id < ref->ctrl->id &&
+ (ref->ctrl->flags & 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)
+ if (id < ref->ctrl->id &&
+ (ref->ctrl->flags & mask) == match)
break;
+ if (&ref->node == &hdl->ctrl_refs)
+ ref = NULL;
}
}
mutex_unlock(hdl->lock);
+
if (!ref)
return -EINVAL;
@@ -2186,23 +2251,63 @@ 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->minimum = ctrl->minimum;
- qc->maximum = ctrl->maximum;
- qc->default_value = ctrl->default_value;
+ qc->flags = ctrl->flags;
+ qc->type = ctrl->type;
+ if (ctrl->is_ptr)
+ qc->flags |= V4L2_CTRL_FLAG_IS_PTR;
+ if (ctrl->unit)
+ strlcpy(qc->unit, ctrl->unit, sizeof(qc->unit));
+ qc->elem_size = ctrl->elem_size;
+ qc->min.val = ctrl->minimum;
+ qc->max.val = ctrl->maximum;
+ qc->def.val = ctrl->default_value;
+ qc->cols = qc->rows = 1;
if (ctrl->type == V4L2_CTRL_TYPE_MENU
|| ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
- qc->step = 1;
+ qc->step.val = 1;
else
- qc->step = ctrl->step;
- qc->flags = ctrl->flags;
- qc->type = ctrl->type;
+ qc->step.val = ctrl->step;
+ 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 = { 0, qc->id };
+ int rc;
+
+ /* VIDIOC_QUERYCTRL cannot be used to enumerate properties */
+ if (qc->flags & V4L2_CTRL_FLAG_NEXT_PROP)
+ return -EINVAL;
+ 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.min.val;
+ qc->maximum = qec.max.val;
+ qc->step = qec.step.val;
+ qc->default_value = qec.def.val;
+ 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_PROP))
return -EINVAL;
return v4l2_queryctrl(sd->ctrl_handler, qc);
}
@@ -2302,7 +2407,8 @@ 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;
@@ -2334,6 +2440,13 @@ 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;
@@ -2414,7 +2527,7 @@ 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++)
@@ -2476,11 +2589,11 @@ 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
+ /* Complex 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)
@@ -2506,7 +2619,7 @@ 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;
@@ -2525,7 +2638,7 @@ 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;
@@ -2661,7 +2774,7 @@ 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)
@@ -2766,11 +2879,11 @@ 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
+ /* Complex 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_int)
return -EINVAL;
/* Reset the 'is_new' flags of the cluster */
@@ -2812,7 +2925,7 @@ 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)
@@ -2836,7 +2949,7 @@ 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);
}
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 3998049..38aa230 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -36,6 +36,19 @@ struct v4l2_subscribed_event;
struct v4l2_fh;
struct poll_table_struct;
+/** union v4l2_ctrl_ptr - A pointer to a control value.
+ * @val: Pointer to a 32-bit signed value.
+ * @val64: Pointer to a 64-bit signed value.
+ * @string: Pointer to a string.
+ * @p: Pointer to a property value.
+ */
+union v4l2_ctrl_ptr {
+ s32 *p_s32;
+ s64 *p_s64;
+ char *p_char;
+ void *p;
+};
+
/** struct v4l2_ctrl_ops - The control operations that the driver has to
provide.
* @g_volatile_ctrl: Get a new value for this control. Generally only relevant
* for volatile (and usually read-only) controls such as a control
@@ -73,6 +86,12 @@ 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 a matrix and/or has type >=
V4L2_PROP_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
@@ -91,6 +110,7 @@ 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
@@ -105,7 +125,6 @@ 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
@@ -124,6 +143,9 @@ 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;
@@ -134,6 +156,7 @@ struct v4l2_ctrl {
const char *unit;
enum v4l2_ctrl_type type;
s64 minimum, maximum, default_value;
+ u32 elem_size;
union {
u64 step;
u64 menu_skip_mask;
@@ -143,17 +166,21 @@ struct v4l2_ctrl {
const s64 *qmenu_int;
};
unsigned long flags;
+ void *priv;
union {
s32 val;
s64 val64;
char *string;
- } cur;
+ void *p;
+ };
union {
s32 val;
s64 val64;
char *string;
- };
- void *priv;
+ void *p;
+ } cur;
+ union v4l2_ctrl_ptr new;
+ union v4l2_ctrl_ptr stores[];
};
/** struct v4l2_ctrl_ref - The control reference.
@@ -215,6 +242,7 @@ 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,
@@ -239,6 +267,7 @@ struct v4l2_ctrl_config {
s64 max;
u64 step;
s64 def;
+ u32 elem_size;
u32 flags;
u64 menu_skip_mask;
const char * const *qmenu;
@@ -664,6 +693,7 @@ 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,
--
1.8.5.2
--
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