V4L/DVB (8637): v4l2: add v4l2_ctrl_query_menu_valid_items support function

v4l2_ctrl_query_menu_valid_items() makes it easy to handle control menus
that have a lot of invalid 'holes'. For example, many MPEG encoders only
support a limited subset of audio bitrates. In that case a driver can
specify an array listing the set of valid bitrates and pass that to
this function.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 8b678e0d46e3..0c195ccd45d2 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -82,6 +82,8 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 ste
 int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl);
 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu,
                 struct v4l2_queryctrl *qctrl, const char **menu_items);
+#define V4L2_CTRL_MENU_IDS_END (0xffffffff)
+int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids);
 u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id);
 
 /* ------------------------------------------------------------------------- */