Enum Error 

#[non_exhaustive]
pub enum Error {
    PermissionDenied,
    DeviceNotFound(String),
    DeviceInUse,
    FormatNotSupported,
    Timeout,
    StreamEnded,
    MjpegDecode(String),
    BackendNotImplemented {
        platform: &'static str,
    },
    Backend {
        platform: &'static str,
        message: String,
    },
    Unsupported {
        platform: &'static str,
        reason: &'static str,
    },
    InvalidSubnet(String),
}

Every error returned by cameras.

Matches on shape, not string text. Each variant carries the context needed to diagnose the failure without having to parse a message.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

PermissionDenied

The user or OS denied access to camera hardware.

DeviceNotFound(String)

The supplied crate::DeviceId did not match any currently-connected device.

DeviceInUse

Another application holds exclusive access to the camera.

FormatNotSupported

The requested crate::StreamConfig is not supported by the device.

Timeout

crate::next_frame did not receive a frame before the timeout expired.

StreamEnded

The camera stream ended (for example, the device was unplugged).

MjpegDecode(String)

MJPEG decoding via zune-jpeg failed.

BackendNotImplemented

The current platform does not yet have a backend implementation.

Fields

platform: &'static str

Name of the platform that is missing a backend.

Backend

Catch-all for platform-specific failures (ObjC exceptions, HRESULTs, ioctl errors).

Fields

platform: &'static str

Name of the platform that raised the error.

message: String

Human-readable message from the underlying platform API.

Unsupported

The requested control or capability is not supported on this platform/device.

Fields

platform: &'static str

Name of the platform reporting the unsupported operation.

reason: &'static str

Short identifier for what is unsupported (control field name, missing interface, or scope phrase).

InvalidSubnet(String)

A CIDR subnet passed to discovery was rejected (unparsable, IPv6, or exceeds the host cap).

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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.