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Iterator: Added integration with IEnumerable

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This commit is contained in:
Stephan Sundermann 2013-10-11 14:53:39 +02:00
parent 602ea036fe
commit cd0c436ece
2 changed files with 105 additions and 0 deletions
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103
sources/custom/Iterator.cs Normal file
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@ -0,0 +1,103 @@
// Iterator.cs - Custom iterator wrapper for IEnumerable
//
// Author: Sebastian Dröge
// Stephan Sundermann <stephansundermann@gmail.com>
//
// Copyright (c) 2004-2009 Novell, Inc.
//
// 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 {
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;
IteratorResult ret = iterator.Next (out 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 pads");
}
} 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 ();
}
}
}

2
sources/gstreamer-sharp.metadata
View file

@ -47,6 +47,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
<attr path="/api/namespace//struct[field/@cname='mini_object']" name="native">true</attr>
<change-node-type path="/api/namespace//boxed[@cname='GstStructure']">struct</change-node-type>
<attr path="/api/namespace/struct[@cname='GstStructure']" name="native">true</attr>
<change-node-type path="/api/namespace//boxed[@cname='GstIterator']">struct</change-node-type>
<attr path="/api/namespace/struct[@cname='GstIterator']" name="native">true</attr>
<remove-node path="/api/namespace/boxed[@cname='GstStructure']/field[@cname='name']" />
<!-- Maybe some problems with the name -->
<remove-node path="/api/namespace/interface[@cname='GstURIHandler']/class_struct/method[@vm='get_type']" name="vm" />