v4l 0.14.0

Safe video4linux (v4l) bindings
Documentation 
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pub mod parameters;
pub use parameters::Parameters;

use std::convert::TryFrom;
use std::{io, mem};

use crate::buffer::Type;
use crate::device::Device;
use crate::format::FourCC;
use crate::format::{Description as FormatDescription, Format};
use crate::frameinterval::FrameInterval;
use crate::framesize::FrameSize;
use crate::v4l2;
use crate::v4l_sys::*;
use crate::video::traits::Capture;

impl Capture for Device {
    impl_enum_frameintervals!();
    impl_enum_framesizes!();
    impl_enum_formats!(Type::VideoCapture);
    impl_format!(Type::VideoCapture);
    impl_set_format!(Type::VideoCapture);

    fn params(&self) -> io::Result<Parameters> {
        unsafe {
            let mut v4l2_params = v4l2_streamparm {
                type_: Type::VideoCapture as u32,
                ..mem::zeroed()
            };
            v4l2::ioctl(
                self.handle().fd(),
                v4l2::vidioc::VIDIOC_G_PARM,
                &mut v4l2_params as *mut _ as *mut std::os::raw::c_void,
            )?;

            Ok(Parameters::from(v4l2_params.parm.capture))
        }
    }

    fn set_params(&self, params: &Parameters) -> io::Result<Parameters> {
        unsafe {
            let mut v4l2_params = v4l2_streamparm {
                type_: Type::VideoCapture as u32,
                parm: v4l2_streamparm__bindgen_ty_1 {
                    capture: (*params).into(),
                },
            };
            v4l2::ioctl(
                self.handle().fd(),
                v4l2::vidioc::VIDIOC_S_PARM,
                &mut v4l2_params as *mut _ as *mut std::os::raw::c_void,
            )?;
        }

        self.params()
    }
}