mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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124 lines
No EOL
3.7 KiB
C#
124 lines
No EOL
3.7 KiB
C#
// Copyright (C) 2013 Stephan Sundermann <stephansundermann@gmail.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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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
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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namespace Gst
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{
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using System;
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using System.Runtime.InteropServices;
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public partial class TagList
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{
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[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern int gst_structure_n_fields (IntPtr raw);
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public int Size {
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get {
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int raw_ret = gst_structure_n_fields (Handle);
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int ret = raw_ret;
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return ret;
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}
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}
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[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern bool gst_tag_list_copy_value (ref GLib.Value dest, IntPtr list, IntPtr tag);
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public object this [string tag, uint index] {
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get {
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IntPtr raw_string = GLib.Marshaller.StringToPtrGStrdup (tag);
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IntPtr raw_ret = gst_tag_list_get_value_index (Handle, raw_string, index);
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GLib.Marshaller.Free (raw_string);
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if (raw_ret == IntPtr.Zero)
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return null;
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GLib.Value v = (GLib.Value)Marshal.PtrToStructure (raw_ret, typeof(GLib.Value));
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return (object)v.Val;
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}
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}
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public object this [string tag] {
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get {
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GLib.Value v = GLib.Value.Empty;
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bool success;
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IntPtr raw_string = GLib.Marshaller.StringToPtrGStrdup (tag);
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success = gst_tag_list_copy_value (ref v, Handle, raw_string);
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GLib.Marshaller.Free (raw_string);
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if (!success)
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return null;
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object ret = (object)v.Val;
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v.Dispose ();
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return ret;
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}
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}
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public void Add (Gst.TagMergeMode mode, string tag, object value)
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{
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if (!Tag.TagExists (tag))
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throw new ArgumentException (String.Format ("Invalid tag name '{0}'", tag));
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GLib.Value v = new GLib.Value (value);
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IntPtr raw_v = GLib.Marshaller.StructureToPtrAlloc (v);
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IntPtr raw_string = GLib.Marshaller.StringToPtrGStrdup (tag);
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gst_tag_list_add_value (Handle, (int)mode, raw_string, raw_v);
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Marshal.FreeHGlobal (raw_v);
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v.Dispose ();
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GLib.Marshaller.Free (raw_string);
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}
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[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern IntPtr gst_structure_nth_field_name (IntPtr raw, uint index);
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private string NthFieldName (uint index)
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{
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IntPtr raw_ret = gst_structure_nth_field_name (Handle, index);
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string ret = GLib.Marshaller.Utf8PtrToString (raw_ret);
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return ret;
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}
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public string[] Tags {
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get {
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string[] tags = new string[Size];
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for (uint i = 0; i < Size; i++)
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tags [i] = NthFieldName (i);
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return tags;
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}
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}
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[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
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static extern IntPtr gst_structure_get_value (IntPtr raw, IntPtr fieldname);
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public GLib.List GetTag (string tag)
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{
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IntPtr raw_string = GLib.Marshaller.StringToPtrGStrdup (tag);
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IntPtr raw_ret = gst_structure_get_value (Handle, raw_string);
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GLib.Marshaller.Free (raw_string);
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GLib.Value ret = (GLib.Value)Marshal.PtrToStructure (raw_ret, typeof(GLib.Value));
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object o = ret.Val;
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if (o.GetType () == typeof(GLib.List))
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return (GLib.List)o;
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return new GLib.List (new object[] { o }, o.GetType(), true, true);
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}
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}
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} |