moq-v4l 0.1.0

Safe Video4Linux 2 bindings, forked from raymanfx/libv4l-rs with the kernel bindings checked in (no bindgen, no libclang)
Documentation 
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use std::io;

use crate::buffer::Metadata;

/// Streaming I/O
pub trait Stream {
	type Item: ?Sized;

	/// Start streaming, takes exclusive ownership of a device
	fn start(&mut self) -> io::Result<()>;

	/// Stop streaming, frees all buffers
	fn stop(&mut self) -> io::Result<()>;
}

pub trait CaptureStream<'a>: Stream {
	/// Insert a buffer into the drivers' incoming queue
	fn queue(&mut self, index: usize) -> io::Result<()>;

	/// Remove a buffer from the drivers' outgoing queue
	fn dequeue(&mut self) -> io::Result<usize>;

	/// Fetch a new frame by first queueing and then dequeueing.
	/// First time initialization is performed if necessary.
	fn next(&'a mut self) -> io::Result<(&'a Self::Item, &'a Metadata)>;
}

pub trait OutputStream<'a>: Stream {
	/// Insert a buffer into the drivers' incoming queue
	fn queue(&mut self, index: usize) -> io::Result<()>;

	/// Remove a buffer from the drivers' outgoing queue
	fn dequeue(&mut self) -> io::Result<usize>;

	/// Dump a new frame by first queueing and then dequeueing.
	/// First time initialization is performed if necessary.
	fn next(&'a mut self) -> io::Result<(&'a mut Self::Item, &'a mut Metadata)>;
}