diff --git a/sources/custom/Iterator.cs b/sources/custom/Iterator.cs new file mode 100644 index 0000000000..5ac128213d --- /dev/null +++ b/sources/custom/Iterator.cs @@ -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 (); + } + + } +} diff --git a/sources/gstreamer-sharp.metadata b/sources/gstreamer-sharp.metadata index 1eef09abe9..60f57818f4 100644 --- a/sources/gstreamer-sharp.metadata +++ b/sources/gstreamer-sharp.metadata @@ -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" />