gstreamer-rs/gstreamer/src/device_provider.rs

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// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use crate::DeviceProvider;
use crate::Plugin;
use crate::Rank;
use glib::object::IsA;
use glib::translate::ToGlib;
use glib::translate::ToGlibPtr;
use std::ffi::CStr;
impl DeviceProvider {
pub fn register(
plugin: Option<&Plugin>,
name: &str,
rank: Rank,
type_: glib::types::Type,
) -> Result<(), glib::error::BoolError> {
assert_initialized_main_thread!();
unsafe {
glib::glib_result_from_gboolean!(
ffi::gst_device_provider_register(
plugin.to_glib_none().0,
name.to_glib_none().0,
rank.to_glib() as u32,
type_.to_glib()
),
"Failed to register device provider factory"
)
}
}
}
pub trait DeviceProviderExtManual: 'static {
fn get_metadata<'a>(&self, key: &str) -> Option<&'a str>;
}
impl<O: IsA<DeviceProvider>> DeviceProviderExtManual for O {
fn get_metadata<'a>(&self, key: &str) -> Option<&'a str> {
unsafe {
let klass = (*(self.as_ptr() as *mut glib::gobject_ffi::GTypeInstance)).g_class
as *mut ffi::GstDeviceProviderClass;
let ptr = ffi::gst_device_provider_class_get_metadata(klass, key.to_glib_none().0);
if ptr.is_null() {
None
} else {
Some(CStr::from_ptr(ptr).to_str().unwrap())
}
}
}
}