Struct v4l::buffers::host::HostBuffer

pub struct HostBuffer { /* fields omitted */ }

Represents a host buffer backed by RAM

Implementations

impl HostBuffer

pub fn new(view: &[u8], meta: Metadata) -> Self

Returns a buffer backed by host memory (RAM)

The view slice is copied by cloning its bytes into a backing storage container. This means a HostBuffer can always be passed around freely with no associated lifetimes.

Arguments

• view - Slice of raw memory
• meta - Metadata, usually filled in by the driver

Example

use v4l::{buffer, HostBuffer, Timestamp};

let data: Vec<u8> = Vec::new();
let ts = Timestamp::new(0 /* sec */, 0 /* usec */);
let flags = buffer::Flags::from(0);
let meta = buffer::Metadata::new(0, ts, flags);
let buf = HostBuffer::new(&data, meta);

pub fn from<B: Buffer>(buf: &B) -> Self

Trait Implementations

impl Buffer for HostBuffer

fn data(&self) -> &[u8]

Slice of read-only data

fn len(&self) -> usize

Size of the backing memory region

fn is_empty(&self) -> bool

Whether the backing buffer is empty

fn meta(&self) -> &Metadata

Metadata such as allocation flags, timestamp and more