gstreamer-rs/gstreamer/src/auto/control_source.rs

// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use glib::object::IsA;
use glib::translate::*;
use gst_sys;
use std::mem;
use ClockTime;
use Object;

glib_wrapper! {
    pub struct ControlSource(Object<gst_sys::GstControlSource, gst_sys::GstControlSourceClass, ControlSourceClass>) @extends Object;

    match fn {
        get_type => || gst_sys::gst_control_source_get_type(),
    }
}

unsafe impl Send for ControlSource {}
unsafe impl Sync for ControlSource {}

pub const NONE_CONTROL_SOURCE: Option<&ControlSource> = None;

pub trait ControlSourceExt: 'static {
    fn get_value(&self, timestamp: ClockTime) -> Option<f64>;
}

impl<O: IsA<ControlSource>> ControlSourceExt for O {
    fn get_value(&self, timestamp: ClockTime) -> Option<f64> {
        unsafe {
            let mut value = mem::MaybeUninit::uninit();
            let ret = from_glib(gst_sys::gst_control_source_get_value(
                self.as_ref().to_glib_none().0,
                timestamp.to_glib(),
                value.as_mut_ptr(),
            ));
            let value = value.assume_init();
            if ret {
                Some(value)
            } else {
                None
            }
        }
    }
}