The control type init operation is called in a loop to initialize all elements of a control. Not only is this inefficient for control types that could use a memset(), it also complicates the implementation of custom control types, for instance when a matrix needs to be initialized with different values for its elements.
Make the init operation initialize the whole control instead, and use memset() when possible. Signed-off-by: Laurent Pinchart <[email protected]> --- drivers/media/v4l2-core/v4l2-ctrls.c | 40 +++++++++++++++++++++++++++++------- include/media/v4l2-ctrls.h | 3 +-- 2 files changed, 34 insertions(+), 9 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index adac93e..ba996de 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -1263,8 +1263,8 @@ static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx, } } -static void std_init(const struct v4l2_ctrl *ctrl, u32 idx, - union v4l2_ctrl_ptr ptr) +static void std_init_one(const struct v4l2_ctrl *ctrl, u32 idx, + union v4l2_ctrl_ptr ptr) { switch (ctrl->type) { case V4L2_CTRL_TYPE_STRING: @@ -1301,6 +1301,35 @@ static void std_init(const struct v4l2_ctrl *ctrl, u32 idx, } } +static void std_init(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr ptr) +{ + u32 idx; + + switch (ctrl->type) { + case V4L2_CTRL_TYPE_STRING: + case V4L2_CTRL_TYPE_INTEGER64: + case V4L2_CTRL_TYPE_INTEGER: + case V4L2_CTRL_TYPE_INTEGER_MENU: + case V4L2_CTRL_TYPE_MENU: + case V4L2_CTRL_TYPE_BITMASK: + case V4L2_CTRL_TYPE_BOOLEAN: + case V4L2_CTRL_TYPE_U16: + case V4L2_CTRL_TYPE_S16: + case V4L2_CTRL_TYPE_U32: + case V4L2_CTRL_TYPE_S32: + for (idx = 0; idx < ctrl->elems; idx++) + std_init_one(ctrl, idx, ptr); + break; + case V4L2_CTRL_TYPE_U8: + case V4L2_CTRL_TYPE_S8: + memset(ptr.p_u8, ctrl->default_value, ctrl->elems); + break; + default: + memset(ptr.p, 0, ctrl->elems * ctrl->elem_size); + break; + } +} + static void std_log(const struct v4l2_ctrl *ctrl) { union v4l2_ctrl_ptr ptr = ctrl->p_cur; @@ -1929,7 +1958,6 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, unsigned elems = 1; bool is_array; unsigned tot_ctrl_size; - unsigned idx; void *data; int err; @@ -2049,10 +2077,8 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, ctrl->p_new.p = &ctrl->val; ctrl->p_cur.p = &ctrl->cur.val; } - for (idx = 0; idx < elems; idx++) { - ctrl->type_ops->init(ctrl, idx, ctrl->p_cur); - ctrl->type_ops->init(ctrl, idx, ctrl->p_new); - } + ctrl->type_ops->init(ctrl, ctrl->p_cur); + ctrl->type_ops->init(ctrl, ctrl->p_new); if (handler_new_ref(hdl, ctrl)) { kfree(ctrl); diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h index e1cfb8f..a7280e9 100644 --- a/include/media/v4l2-ctrls.h +++ b/include/media/v4l2-ctrls.h @@ -87,8 +87,7 @@ struct v4l2_ctrl_type_ops { bool (*equal)(const struct v4l2_ctrl *ctrl, u32 idx, union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2); - void (*init)(const struct v4l2_ctrl *ctrl, u32 idx, - union v4l2_ctrl_ptr ptr); + void (*init)(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr ptr); void (*log)(const struct v4l2_ctrl *ctrl); int (*validate)(const struct v4l2_ctrl *ctrl, u32 idx, union v4l2_ctrl_ptr ptr); -- 2.0.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
