mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 09:40:37 +00:00
118 lines
3.6 KiB
C#
118 lines
3.6 KiB
C#
//
|
|
// Authors:
|
|
// Andrés G. Aragoneses <knocte@gmail.com>
|
|
// Sebastian Dröge <slomo@circular-chaos.org>
|
|
// Stephan Sundermann <stephansundermann@gmail.com>
|
|
//
|
|
// Copyright (c) 2009 Sebastian Dröge
|
|
// Copyright (c) 2013 Andrés G. Aragoneses
|
|
// Copyright (C) 2013 Stephan Sundermann
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
// 02110-1301 USA
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Runtime.InteropServices;
|
|
|
|
namespace Gst {
|
|
|
|
public class PropertyNotFoundException : Exception {}
|
|
|
|
[StructLayout (LayoutKind.Sequential)]
|
|
struct GstObject {
|
|
IntPtr _lock;
|
|
public string name;
|
|
public Object parent;
|
|
public uint flags;
|
|
IntPtr controlBindings;
|
|
public int control_rate;
|
|
public int last_sync;
|
|
|
|
private IntPtr[] _gstGstReserved;
|
|
}
|
|
|
|
partial class Object
|
|
{
|
|
private Dictionary <string, bool> PropertyNameCache = new Dictionary<string, bool> ();
|
|
|
|
[DllImport ("gobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
|
|
static extern IntPtr g_object_class_find_property (IntPtr klass, IntPtr name);
|
|
|
|
bool PropertyExists (string name) {
|
|
if (PropertyNameCache.ContainsKey (name))
|
|
return PropertyNameCache [name];
|
|
|
|
IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
|
|
var ptr = g_object_class_find_property (Marshal.ReadIntPtr (Handle), native_name);
|
|
var result = ptr != IntPtr.Zero;
|
|
|
|
// just cache the positive results because there might
|
|
// actually be new properties getting installed
|
|
if (result)
|
|
PropertyNameCache [name] = result;
|
|
|
|
GLib.Marshaller.Free (native_name);
|
|
return result;
|
|
}
|
|
|
|
public object this[string property] {
|
|
get {
|
|
if (PropertyExists (property)) {
|
|
using (GLib.Value v = GetProperty (property)) {
|
|
return v.Val;
|
|
}
|
|
} else
|
|
throw new PropertyNotFoundException ();
|
|
} set {
|
|
if (PropertyExists (property)) {
|
|
if (value == null) {
|
|
throw new ArgumentNullException ();
|
|
}
|
|
var type = value.GetType ();
|
|
var gtype = (GLib.GType)type;
|
|
if (gtype == null) {
|
|
throw new Exception ("Could not find a GType for type " + type.FullName);
|
|
}
|
|
GLib.Value v = new GLib.Value ((GLib.GType)value.GetType ());
|
|
v.Val = value;
|
|
SetProperty (property, v);
|
|
v.Dispose ();
|
|
} else
|
|
throw new PropertyNotFoundException ();
|
|
}
|
|
}
|
|
|
|
public void Connect (string signal, SignalHandler handler) {
|
|
DynamicSignal.Connect (this, signal, handler);
|
|
}
|
|
|
|
public void Disconnect (string signal, SignalHandler handler) {
|
|
DynamicSignal.Disconnect (this, signal, handler);
|
|
}
|
|
|
|
public void Connect (string signal, Delegate handler) {
|
|
DynamicSignal.Connect (this, signal, handler);
|
|
}
|
|
|
|
public void Disconnect (string signal, Delegate handler) {
|
|
DynamicSignal.Disconnect (this, signal, handler);
|
|
}
|
|
|
|
public object Emit (string signal, params object[] parameters) {
|
|
return DynamicSignal.Emit (this, signal, parameters);
|
|
}
|
|
}
|
|
}
|