mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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675 lines
19 KiB
C#
675 lines
19 KiB
C#
// Gst.GLib.Value.cs - GLib Value class implementation
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//
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// Author: Mike Kestner <mkestner@speakeasy.net>
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//
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// Copyright (c) 2001 Mike Kestner
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// Copyright (c) 2003-2004 Novell, Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the Lesser GNU General
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// Public License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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namespace Gst.GLib {
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using System;
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using System.Collections;
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using System.Reflection;
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using System.Runtime.InteropServices;
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[StructLayout (LayoutKind.Sequential)]
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public struct Value : IDisposable {
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[StructLayout(LayoutKind.Explicit)]
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struct Padding {
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[FieldOffset (0)] int v_int;
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[FieldOffset (0)] uint v_uint;
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[FieldOffset (0)] int v_long;
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[FieldOffset (0)] uint v_ulong;
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[FieldOffset (0)] long v_int64;
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[FieldOffset (0)] ulong v_uint64;
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[FieldOffset (0)] float v_float;
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[FieldOffset (0)] double v_double;
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[FieldOffset (0)] IntPtr v_pointer;
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}
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IntPtr type;
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Padding pad1;
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Padding pad2;
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public static Value Empty;
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public Value (Gst.GLib.GType gtype)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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g_value_init (ref this, gtype.Val);
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}
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public Value (object obj)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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GType gtype = (GType) obj.GetType ();
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g_value_init (ref this, gtype.Val);
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Val = obj;
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}
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public Value (bool val) : this (GType.Boolean)
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{
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g_value_set_boolean (ref this, val);
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}
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public Value (byte val) : this (GType.UChar)
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{
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g_value_set_uchar (ref this, val);
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}
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public Value (sbyte val) : this (GType.Char)
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{
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g_value_set_char (ref this, val);
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}
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public Value (int val) : this (GType.Int)
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{
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g_value_set_int (ref this, val);
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}
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public Value (uint val) : this (GType.UInt)
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{
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g_value_set_uint (ref this, val);
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}
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public Value (ushort val) : this (GType.UInt)
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{
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g_value_set_uint (ref this, val);
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}
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public Value (long val) : this (GType.Int64)
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{
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g_value_set_int64 (ref this, val);
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}
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public Value (ulong val) : this (GType.UInt64)
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{
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g_value_set_uint64 (ref this, val);
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}
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[Obsolete ("Replaced by Value(object) constructor")]
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public Value (EnumWrapper wrap, string type_name)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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g_value_init (ref this, GType.FromName (type_name).Val);
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if (wrap.flags)
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g_value_set_flags (ref this, (uint) (int) wrap);
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else
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g_value_set_enum (ref this, (int) wrap);
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}
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public Value (float val) : this (GType.Float)
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{
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g_value_set_float (ref this, val);
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}
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public Value (double val) : this (GType.Double)
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{
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g_value_set_double (ref this, val);
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}
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public Value (string val) : this (GType.String)
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{
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IntPtr native_val = Gst.GLib.Marshaller.StringToPtrGStrdup (val);
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g_value_set_string (ref this, native_val);
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Gst.GLib.Marshaller.Free (native_val);
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}
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public Value (ValueArray val) : this (ValueArray.GType)
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{
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g_value_set_boxed (ref this, val.Handle);
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}
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public Value (IntPtr val) : this (GType.Pointer)
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{
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g_value_set_pointer (ref this, val);
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}
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public Value (Opaque val, string type_name)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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g_value_init (ref this, GType.FromName (type_name).Val);
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g_value_set_boxed (ref this, val.Handle);
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}
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public Value (Gst.GLib.Object val) : this (val == null ? GType.Object : val.NativeType)
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{
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g_value_set_object (ref this, val == null ? IntPtr.Zero : val.Handle);
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}
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public Value (Gst.GLib.GInterfaceAdapter val) : this (val == null ? GType.Object : val.GType)
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{
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g_value_set_object (ref this, val == null ? IntPtr.Zero : val.Handle);
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}
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public Value (Gst.GLib.Object obj, string prop_name)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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InitForProperty (obj, prop_name);
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}
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[Obsolete]
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public Value (Gst.GLib.Object obj, string prop_name, EnumWrapper wrap)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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InitForProperty (obj.NativeType, prop_name);
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if (wrap.flags)
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g_value_set_flags (ref this, (uint) (int) wrap);
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else
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g_value_set_enum (ref this, (int) wrap);
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}
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[Obsolete]
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public Value (IntPtr obj, string prop_name, Opaque val)
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{
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type = IntPtr.Zero;
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pad1 = new Padding ();
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pad2 = new Padding ();
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InitForProperty (Gst.GLib.Object.GetObject (obj), prop_name);
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g_value_set_boxed (ref this, val.Handle);
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}
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public Value (string[] val) : this (new Gst.GLib.GType (g_strv_get_type ()))
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{
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if (val == null) {
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g_value_set_boxed (ref this, IntPtr.Zero);
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return;
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}
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IntPtr native_array = Marshal.AllocHGlobal ((val.Length + 1) * IntPtr.Size);
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for (int i = 0; i < val.Length; i++)
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Marshal.WriteIntPtr (native_array, i * IntPtr.Size, Gst.GLib.Marshaller.StringToPtrGStrdup (val[i]));
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Marshal.WriteIntPtr (native_array, val.Length * IntPtr.Size, IntPtr.Zero);
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g_value_set_boxed (ref this, native_array);
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for (int i = 0; i < val.Length; i++)
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Gst.GLib.Marshaller.Free (Marshal.ReadIntPtr (native_array, i * IntPtr.Size));
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Marshal.FreeHGlobal (native_array);
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}
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public void Dispose ()
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{
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g_value_unset (ref this);
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}
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public void Init (Gst.GLib.GType gtype)
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{
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g_value_init (ref this, gtype.Val);
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}
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public static explicit operator bool (Value val)
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{
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return g_value_get_boolean (ref val);
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}
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public static explicit operator byte (Value val)
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{
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return g_value_get_uchar (ref val);
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}
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public static explicit operator sbyte (Value val)
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{
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return g_value_get_char (ref val);
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}
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public static explicit operator int (Value val)
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{
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return g_value_get_int (ref val);
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}
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public static explicit operator uint (Value val)
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{
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return g_value_get_uint (ref val);
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}
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public static explicit operator ushort (Value val)
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{
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return (ushort) g_value_get_uint (ref val);
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}
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public static explicit operator long (Value val)
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{
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return g_value_get_int64 (ref val);
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}
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public static explicit operator ulong (Value val)
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{
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return g_value_get_uint64 (ref val);
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}
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[Obsolete ("Replaced by Enum cast")]
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public static explicit operator EnumWrapper (Value val)
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{
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if (val.HoldsFlags)
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return new EnumWrapper ((int)g_value_get_flags (ref val), true);
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else
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return new EnumWrapper (g_value_get_enum (ref val), false);
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}
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public static explicit operator Enum (Value val)
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{
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if (val.HoldsFlags)
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return (Enum)Enum.ToObject (GType.LookupType (val.type), g_value_get_flags (ref val));
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else
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return (Enum)Enum.ToObject (GType.LookupType (val.type), g_value_get_enum (ref val));
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}
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public static explicit operator float (Value val)
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{
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return g_value_get_float (ref val);
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}
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public static explicit operator double (Value val)
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{
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return g_value_get_double (ref val);
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}
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public static explicit operator string (Value val)
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{
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IntPtr str = g_value_get_string (ref val);
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return str == IntPtr.Zero ? null : Gst.GLib.Marshaller.Utf8PtrToString (str);
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}
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public static explicit operator ValueArray (Value val)
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{
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return new ValueArray (g_value_get_boxed (ref val));
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}
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public static explicit operator IntPtr (Value val)
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{
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return g_value_get_pointer (ref val);
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}
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public static explicit operator Gst.GLib.Opaque (Value val)
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{
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return Gst.GLib.Opaque.GetOpaque (g_value_get_boxed (ref val), (Type) new GType (val.type), false);
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}
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public static explicit operator Gst.GLib.Boxed (Value val)
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{
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return new Gst.GLib.Boxed (g_value_get_boxed (ref val));
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}
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public static explicit operator Gst.GLib.Object (Value val)
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{
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return Gst.GLib.Object.GetObject (g_value_get_object (ref val), false);
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}
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[Obsolete ("Replaced by Gst.GLib.Object cast")]
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public static explicit operator Gst.GLib.UnwrappedObject (Value val)
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{
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return new UnwrappedObject (g_value_get_object (ref val));
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}
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public static explicit operator string[] (Value val)
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{
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IntPtr native_array = g_value_get_boxed (ref val);
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if (native_array == IntPtr.Zero)
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return null;
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int count = 0;
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while (Marshal.ReadIntPtr (native_array, count * IntPtr.Size) != IntPtr.Zero)
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count++;
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string[] strings = new string[count];
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for (int i = 0; i < count; i++)
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strings[i] = Gst.GLib.Marshaller.Utf8PtrToString (Marshal.ReadIntPtr (native_array, i * IntPtr.Size));
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return strings;
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}
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object ToRegisteredType () {
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Type t = Gst.GLib.GType.LookupType (type);
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ConstructorInfo ci = null;
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try {
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while (ci == null && t != null) {
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if (!t.IsAbstract)
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ci = t.GetConstructor (new Type[] { typeof (Gst.GLib.Value) });
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if (ci == null)
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t = t.BaseType;
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}
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} catch (Exception) {
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ci = null;
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}
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if (ci == null)
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throw new Exception ("Unknown type " + new GType (type).ToString ());
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return ci.Invoke (new object[] {this});
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}
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void FromRegisteredType (object val) {
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Type t = Gst.GLib.GType.LookupType (type);
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MethodInfo mi = null;
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try {
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while (mi == null && t != null) {
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mi = t.GetMethod ("SetGValue", new Type[] { Type.GetType ("Gst.GLib.Value&") });
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if (mi != null && (mi.IsAbstract || mi.ReturnType != typeof (void)))
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mi = null;
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if (mi == null)
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t = t.BaseType;
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}
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} catch (Exception) {
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mi = null;
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}
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if (mi == null)
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throw new Exception ("Unknown type " + new GType (type).ToString ());
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object[] parameters = new object[] { this };
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mi.Invoke (val, parameters);
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this = (Gst.GLib.Value) parameters[0];
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}
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object ToEnum ()
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{
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Type t = GType.LookupType (type);
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if (t == null) {
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if (HoldsFlags)
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return g_value_get_flags (ref this);
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else
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return g_value_get_enum (ref this);
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} else {
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return (Enum) this;
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}
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}
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object ToBoxed ()
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{
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IntPtr boxed_ptr = g_value_get_boxed (ref this);
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Type t = GType.LookupType (type);
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if (t == null)
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throw new Exception ("Unknown type " + new GType (type).ToString ());
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else if (t.IsSubclassOf (typeof (Gst.GLib.Opaque)))
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return (Gst.GLib.Opaque) this;
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MethodInfo mi = t.GetMethod ("New", BindingFlags.Static | BindingFlags.Public | BindingFlags.FlattenHierarchy);
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if (mi == null)
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return Marshal.PtrToStructure (boxed_ptr, t);
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else
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return mi.Invoke (null, new object[] {boxed_ptr});
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}
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public object Val
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{
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get {
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if (type == GType.Boolean.Val)
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return (bool) this;
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else if (type == GType.UChar.Val)
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return (byte) this;
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else if (type == GType.Char.Val)
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return (sbyte) this;
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else if (type == GType.Int.Val)
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return (int) this;
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else if (type == GType.UInt.Val)
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return (uint) this;
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else if (type == GType.Int64.Val)
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return (long) this;
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else if (type == GType.UInt64.Val)
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return (ulong) this;
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else if (GType.Is (type, GType.Enum) ||
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GType.Is (type, GType.Flags))
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return ToEnum ();
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else if (type == GType.Float.Val)
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return (float) this;
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else if (type == GType.Double.Val)
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return (double) this;
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else if (type == GType.String.Val)
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return (string) this;
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else if (type == GType.Pointer.Val)
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return (IntPtr) this;
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else if (type == GType.Param.Val)
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return g_value_get_param (ref this);
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else if (type == ValueArray.GType.Val)
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return new ValueArray (g_value_get_boxed (ref this));
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else if (type == ManagedValue.GType.Val)
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return ManagedValue.ObjectForWrapper (g_value_get_boxed (ref this));
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else if (GType.Is (type, GType.Object))
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return (Gst.GLib.Object) this;
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else if (GType.Is (type, GType.Boxed))
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return ToBoxed ();
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else if (GType.LookupType (type) != null)
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return ToRegisteredType ();
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else if (type == IntPtr.Zero)
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return null;
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else
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throw new Exception ("Unknown type " + new GType (type).ToString ());
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}
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set {
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if (type == GType.Boolean.Val)
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g_value_set_boolean (ref this, (bool) value);
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else if (type == GType.UChar.Val)
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g_value_set_uchar (ref this, (byte) value);
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else if (type == GType.Char.Val)
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g_value_set_char (ref this, (sbyte) value);
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else if (type == GType.Int.Val)
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g_value_set_int (ref this, (int) value);
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else if (type == GType.UInt.Val)
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g_value_set_uint (ref this, (uint) value);
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else if (type == GType.Int64.Val)
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g_value_set_int64 (ref this, (long) value);
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else if (type == GType.UInt64.Val)
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g_value_set_uint64 (ref this, (ulong) value);
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else if (GType.Is (type, GType.Enum))
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g_value_set_enum (ref this, (int)value);
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else if (GType.Is (type, GType.Flags))
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g_value_set_flags (ref this, (uint)(int)value);
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else if (type == GType.Float.Val)
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g_value_set_float (ref this, (float) value);
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else if (type == GType.Double.Val)
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g_value_set_double (ref this, (double) value);
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else if (type == GType.String.Val) {
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IntPtr native = Gst.GLib.Marshaller.StringToPtrGStrdup ((string)value);
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g_value_set_string (ref this, native);
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Gst.GLib.Marshaller.Free (native);
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} else if (type == GType.Pointer.Val) {
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if (value.GetType () == typeof (IntPtr)) {
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g_value_set_pointer (ref this, (IntPtr) value);
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return;
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} else if (value is IWrapper) {
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g_value_set_pointer (ref this, ((IWrapper)value).Handle);
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return;
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}
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IntPtr buf = Marshal.AllocHGlobal (Marshal.SizeOf (value.GetType()));
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Marshal.StructureToPtr (value, buf, false);
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g_value_set_pointer (ref this, buf);
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} else if (type == GType.Param.Val) {
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g_value_set_param (ref this, (IntPtr) value);
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} else if (type == ValueArray.GType.Val) {
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g_value_set_boxed (ref this, ((ValueArray) value).Handle);
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} else if (type == ManagedValue.GType.Val) {
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IntPtr wrapper = ManagedValue.WrapObject (value);
|
|
g_value_set_boxed (ref this, wrapper);
|
|
ManagedValue.ReleaseWrapper (wrapper);
|
|
} else if (GType.Is (type, GType.Object))
|
|
if(value is Gst.GLib.Object)
|
|
g_value_set_object (ref this, (value as Gst.GLib.Object).Handle);
|
|
else
|
|
g_value_set_object (ref this, (value as Gst.GLib.GInterfaceAdapter).Handle);
|
|
else if (GType.Is (type, GType.Boxed)) {
|
|
if (value is IWrapper) {
|
|
g_value_set_boxed (ref this, ((IWrapper)value).Handle);
|
|
return;
|
|
}
|
|
IntPtr buf = Marshaller.StructureToPtrAlloc (value);
|
|
g_value_set_boxed (ref this, buf);
|
|
Marshal.FreeHGlobal (buf);
|
|
} else if (Gst.GLib.GType.LookupType (type) != null) {
|
|
FromRegisteredType (value);
|
|
} else
|
|
throw new Exception ("Unknown type " + new GType (type).ToString ());
|
|
}
|
|
}
|
|
|
|
internal void Update (object val)
|
|
{
|
|
if (GType.Is (type, GType.Boxed) && !(val is IWrapper))
|
|
Marshal.StructureToPtr (val, g_value_get_boxed (ref this), false);
|
|
}
|
|
|
|
bool HoldsFlags {
|
|
get { return g_type_check_value_holds (ref this, GType.Flags.Val); }
|
|
}
|
|
|
|
void InitForProperty (Object obj, string name)
|
|
{
|
|
GType gtype = obj.NativeType;
|
|
InitForProperty (gtype, name);
|
|
}
|
|
|
|
void InitForProperty (GType gtype, string name)
|
|
{
|
|
IntPtr p_name = Marshaller.StringToPtrGStrdup (name);
|
|
IntPtr spec_ptr = g_object_class_find_property (gtype.ClassPtr, p_name);
|
|
Marshaller.Free (p_name);
|
|
|
|
if (spec_ptr == IntPtr.Zero)
|
|
throw new Exception (String.Format ("No property with name '{0}' in type '{1}'", name, gtype.ToString()));
|
|
|
|
ParamSpec spec = new ParamSpec (spec_ptr);
|
|
g_value_init (ref this, spec.ValueType.Val);
|
|
}
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_object_class_find_property (IntPtr klass, IntPtr name);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern bool g_type_check_value_holds (ref Value val, IntPtr gtype);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_init (ref Gst.GLib.Value val, IntPtr gtype);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_unset (ref Gst.GLib.Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_boolean (ref Value val, bool data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_uchar (ref Value val, byte data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_char (ref Value val, sbyte data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_boxed (ref Value val, IntPtr data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_double (ref Value val, double data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_float (ref Value val, float data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_int (ref Value val, int data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_int64 (ref Value val, long data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_uint64 (ref Value val, ulong data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_object (ref Value val, IntPtr data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_param (ref Value val, IntPtr data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_pointer (ref Value val, IntPtr data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_string (ref Value val, IntPtr data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_uint (ref Value val, uint data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_enum (ref Value val, int data);
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern void g_value_set_flags (ref Value val, uint data);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern bool g_value_get_boolean (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern byte g_value_get_uchar (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern sbyte g_value_get_char (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_value_get_boxed (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern double g_value_get_double (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern float g_value_get_float (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern int g_value_get_int (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern long g_value_get_int64 (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern ulong g_value_get_uint64 (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_value_get_object (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_value_get_param (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_value_get_pointer (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_value_get_string (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern uint g_value_get_uint (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern int g_value_get_enum (ref Value val);
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern uint g_value_get_flags (ref Value val);
|
|
|
|
[DllImport("libgobject-2.0-0.dll")]
|
|
static extern IntPtr g_strv_get_type ();
|
|
}
|
|
}
|