mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-13 11:56:35 +00:00
bcb8c7d1a3
Most of the contents of these files come from their *.custom counterparts of the 0.9.x version of the bindings, so I'm reinstating their author/licence info here. In some cases, the content is pristine to the previous version (no modification since then), so for these cases the current licence is replaced completely with the previous licence. These were spotted while creating a first version of a debian package (creating a debian/copyright info file requires you to audit all this). This is not (yet) part of BGO#725937.
121 lines
3.1 KiB
C#
121 lines
3.1 KiB
C#
// Iterator.cs - Custom iterator wrapper for IEnumerable
|
|
//
|
|
// Authors:
|
|
// Maarten Bosmans <mkbosmans@gmail.com>
|
|
// Sebastian Dröge <slomo@circular-chaos.org>
|
|
// Stephan Sundermann <stephansundermann@gmail.com>
|
|
//
|
|
// Copyright (c) 2009 Maarten Bosmans
|
|
// Copyright (c) 2009 Sebastian Dröge
|
|
// Copyright (c) 2013 Stephan Sundermann
|
|
//
|
|
// This program is free software; you can redistribute it and/or
|
|
// modify it under the terms of version 2 of the Lesser GNU General
|
|
// Public License as published by the Free Software Foundation.
|
|
//
|
|
// This program 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 program; if not, write to the
|
|
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
// Boston, MA 02111-1307, USA.
|
|
|
|
namespace Gst {
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using System.Runtime.InteropServices;
|
|
using GLib;
|
|
|
|
public partial class Iterator : IEnumerable {
|
|
|
|
[DllImport ("libgobject-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
|
|
static extern IntPtr g_value_reset (ref GLib.Value val);
|
|
|
|
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
|
|
static extern int gst_iterator_next(IntPtr raw, ref GLib.Value elem);
|
|
|
|
public Gst.IteratorResult Next(ref GLib.Value elem) {
|
|
int raw_ret = gst_iterator_next(Handle, ref elem);
|
|
Gst.IteratorResult ret = (Gst.IteratorResult) raw_ret;
|
|
return ret;
|
|
}
|
|
|
|
private class Enumerator : IEnumerator {
|
|
Iterator iterator;
|
|
Hashtable seen = new Hashtable ();
|
|
|
|
private object current = null;
|
|
public object Current {
|
|
get {
|
|
return current;
|
|
}
|
|
}
|
|
|
|
public bool MoveNext () {
|
|
IntPtr raw_ret;
|
|
bool retry = false;
|
|
|
|
if (iterator.Handle == IntPtr.Zero)
|
|
return false;
|
|
|
|
do {
|
|
GLib.Value value = new GLib.Value (GLib.GType.Boolean);
|
|
value.Dispose ();
|
|
|
|
IteratorResult ret = iterator.Next (ref value);
|
|
|
|
switch (ret) {
|
|
case IteratorResult.Done:
|
|
return false;
|
|
case IteratorResult.Ok:
|
|
if (seen.Contains (value)) {
|
|
retry = true;
|
|
break;
|
|
}
|
|
seen.Add (value , null);
|
|
current = value.Val;
|
|
return true;
|
|
case IteratorResult.Resync:
|
|
iterator.Resync ();
|
|
retry = true;
|
|
break;
|
|
default:
|
|
case IteratorResult.Error:
|
|
throw new Exception ("Error while iterating");
|
|
}
|
|
} while (retry);
|
|
|
|
return false;
|
|
}
|
|
|
|
public void Reset () {
|
|
seen.Clear ();
|
|
if (iterator.Handle != IntPtr.Zero)
|
|
iterator.Resync ();
|
|
}
|
|
|
|
public Enumerator (Iterator iterator) {
|
|
this.iterator = iterator;
|
|
}
|
|
}
|
|
|
|
private Enumerator enumerator = null;
|
|
|
|
public IEnumerator GetEnumerator () {
|
|
if (this.enumerator == null)
|
|
this.enumerator = new Enumerator (this);
|
|
return this.enumerator;
|
|
}
|
|
|
|
~Iterator () {
|
|
if (Raw != IntPtr.Zero)
|
|
Free ();
|
|
}
|
|
|
|
}
|
|
}
|