Enum ControlError 

pub enum ControlError {
    NotFound,
    Ambiguous,
    Unsupported,
    Io(String),
}

Why a UVC control operation failed.

Variants

NotFound

No matching camera device (or it exposes no controllable unit).

Ambiguous

The selected camera can’t be uniquely identified: its unique id didn’t resolve to a USB location and more than one Logitech camera is attached, so a write could hit the wrong device. Fails closed instead of guessing.

Unsupported

The camera rejected or didn’t support the control — or the platform has no UVC control backend at all.

Io(String)

A platform API call failed (open, bind, or the control transfer).

Trait Implementations

impl Clone for ControlError

fn clone(&self) -> ControlError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ControlError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ControlError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for ControlError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.