mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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206 lines
7.8 KiB
C#
206 lines
7.8 KiB
C#
// ParamSpec.cs - GParamSpec class wrapper implementation
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//
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// Authors: Mike Kestner <mkestner@novell.com>
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//
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// Copyright (c) 2008 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.Runtime.InteropServices;
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internal enum ParamFlags {
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None = 0,
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Readable = 1 << 0,
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Writable = 1 << 1,
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Construct = 1 << 2,
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ConstructOnly = 1 << 3,
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}
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public class ParamSpec {
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IntPtr handle;
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private static IntPtr CreateParamSpec (string name, string nick, string blurb, GType type, ParamFlags pflags) {
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int flags = (int) pflags;
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IntPtr ret;
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IntPtr p_name = Gst.GLib.Marshaller.StringToPtrGStrdup (name);
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IntPtr p_nick = Gst.GLib.Marshaller.StringToPtrGStrdup (nick);
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IntPtr p_blurb = Gst.GLib.Marshaller.StringToPtrGStrdup (blurb);
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if (type == GType.Char)
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ret = g_param_spec_char (p_name, p_nick, p_blurb, SByte.MinValue, SByte.MaxValue, 0, flags);
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else if (type == GType.UChar)
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ret = g_param_spec_uchar (p_name, p_nick, p_blurb, Byte.MinValue, Byte.MaxValue, 0, flags);
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else if (type == GType.Boolean)
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ret = g_param_spec_boolean (p_name, p_nick, p_blurb, false, flags);
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else if (type == GType.Int)
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ret = g_param_spec_int (p_name, p_nick, p_blurb, Int32.MinValue, Int32.MaxValue, 0, flags);
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else if (type == GType.UInt)
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ret = g_param_spec_uint (p_name, p_nick, p_blurb, 0, UInt32.MaxValue, 0, flags);
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else if (type == GType.Long)
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ret = g_param_spec_long (p_name, p_nick, p_blurb, IntPtr.Zero, IntPtr.Size == 4 ? new IntPtr (Int32.MaxValue) : new IntPtr (Int64.MaxValue), IntPtr.Zero, flags);
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else if (type == GType.ULong)
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ret = g_param_spec_ulong (p_name, p_nick, p_blurb, UIntPtr.Zero, UIntPtr.Size == 4 ? new UIntPtr (UInt32.MaxValue) : new UIntPtr (UInt64.MaxValue), UIntPtr.Zero, flags);
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else if (type == GType.Int64)
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ret = g_param_spec_int64 (p_name, p_nick, p_blurb, Int64.MinValue, Int64.MaxValue, 0, flags);
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else if (type == GType.UInt64)
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ret = g_param_spec_uint64 (p_name, p_nick, p_blurb, 0, UInt64.MaxValue, 0, flags);
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/*
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else if (type == GType.Enum)
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else if (type == GType.Flags)
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* TODO:
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* Both g_param_spec_enum and g_param_spec_flags expect default property values and the members of the enum seemingly cannot be enumerated
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*/
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else if (type == GType.Float)
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ret = g_param_spec_float (p_name, p_nick, p_blurb, Single.MinValue, Single.MaxValue, 0.0f, flags);
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else if (type == GType.Double)
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ret = g_param_spec_double (p_name, p_nick, p_blurb, Double.MinValue, Double.MaxValue, 0.0, flags);
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else if (type == GType.String)
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ret = g_param_spec_string (p_name, p_nick, p_blurb, IntPtr.Zero, flags);
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else if (type == GType.Pointer)
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ret = g_param_spec_pointer (p_name, p_nick, p_blurb, flags);
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else if (type.Val == g_gtype_get_type ())
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ret = g_param_spec_gtype (p_name, p_nick, p_blurb, GType.None.Val, flags);
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else if (g_type_is_a (type.Val, GType.Boxed.Val))
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ret = g_param_spec_boxed (p_name, p_nick, p_blurb, type.Val, flags);
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else if (g_type_is_a (type.Val, GType.Object.Val))
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ret = g_param_spec_object (p_name, p_nick, p_blurb, type.Val, flags);
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else
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throw new ArgumentException ("type");
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Gst.GLib.Marshaller.Free (p_name);
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Gst.GLib.Marshaller.Free (p_nick);
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Gst.GLib.Marshaller.Free (p_blurb);
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return ret;
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}
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internal ParamSpec (string name, string nick, string blurb, GType type, ParamFlags pflags) {
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handle = CreateParamSpec (name, nick, blurb, type, pflags);
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}
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public ParamSpec (string name, string nick, string blurb, GType type, bool readable, bool writable)
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{
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ParamFlags pflags = ParamFlags.None;
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if (readable) pflags |= ParamFlags.Readable;
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if (writable) pflags |= ParamFlags.Writable;
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handle = CreateParamSpec (name, nick, blurb, type, pflags);
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}
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public ParamSpec (IntPtr native)
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{
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handle = native;
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}
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public IntPtr Handle {
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get { return handle; }
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}
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public GType ValueType {
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get {
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GParamSpec spec = (GParamSpec) Marshal.PtrToStructure (Handle, typeof (GParamSpec));
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return new GType (spec.value_type);
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}
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}
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public string Name {
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get {
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GParamSpec spec = (GParamSpec) Marshal.PtrToStructure (Handle, typeof (GParamSpec));
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return Gst.GLib.Marshaller.Utf8PtrToString (spec.name);
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}
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}
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struct GTypeInstance {
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IntPtr g_class;
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}
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struct GParamSpec {
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GTypeInstance g_type_instance;
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public IntPtr name;
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ParamFlags flags;
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public IntPtr value_type;
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IntPtr owner_type;
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IntPtr _nick;
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IntPtr _blurb;
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IntPtr qdata;
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uint ref_count;
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uint param_id;
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}
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_char (IntPtr name, IntPtr nick, IntPtr blurb, sbyte min, sbyte max, sbyte dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_uchar (IntPtr name, IntPtr nick, IntPtr blurb, byte min, byte max, byte dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_boolean (IntPtr name, IntPtr nick, IntPtr blurb, bool dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_int (IntPtr name, IntPtr nick, IntPtr blurb, int min, int max, int dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_uint (IntPtr name, IntPtr nick, IntPtr blurb, uint min, uint max, uint dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_long (IntPtr name, IntPtr nick, IntPtr blurb, IntPtr min, IntPtr max, IntPtr dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_ulong (IntPtr name, IntPtr nick, IntPtr blurb, UIntPtr min, UIntPtr max, UIntPtr dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_int64 (IntPtr name, IntPtr nick, IntPtr blurb, long min, long max, long dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_uint64 (IntPtr name, IntPtr nick, IntPtr blurb, ulong min, ulong max, ulong dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_float (IntPtr name, IntPtr nick, IntPtr blurb, float min, float max, float dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_double (IntPtr name, IntPtr nick, IntPtr blurb, double min, double max, double dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_string (IntPtr name, IntPtr nick, IntPtr blurb, IntPtr dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_pointer (IntPtr name, IntPtr nick, IntPtr blurb, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_gtype (IntPtr name, IntPtr nick, IntPtr blurb, IntPtr dval, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_boxed (IntPtr name, IntPtr nick, IntPtr blurb, IntPtr return_type, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_param_spec_object (IntPtr name, IntPtr nick, IntPtr blurb, IntPtr return_type, int flags);
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[DllImport("libgobject-2.0-0.dll")]
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static extern IntPtr g_gtype_get_type ();
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[DllImport("libgobject-2.0-0.dll")]
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static extern bool g_type_is_a (IntPtr a, IntPtr b);
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}
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}
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