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https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
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39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use DeviceProvider;
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use glib::object::IsA;
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use glib::translate::ToGlibPtr;
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use std::ffi::CStr;
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use ffi;
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use gobject_ffi;
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pub trait DeviceProviderExtManual: 'static {
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fn get_metadata<'a>(&self, key: &str) -> Option<&'a str>;
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}
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impl<O: IsA<DeviceProvider>> DeviceProviderExtManual for O {
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fn get_metadata<'a>(&self, key: &str) -> Option<&'a str> {
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unsafe {
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let klass = (*(self.as_ptr() as *mut gobject_ffi::GTypeInstance)).g_class
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as *mut ffi::GstDeviceProviderClass;
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let ptr = ffi::gst_device_provider_class_get_metadata(klass, key.to_glib_none().0);
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if ptr.is_null() {
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None
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} else {
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Some(CStr::from_ptr(ptr).to_str().unwrap())
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}
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}
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}
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}
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