gstreamer/gstreamer-sharp/NavigationQuery.cs

namespace Gst.Interfaces {

	using System;
	using System.Runtime.InteropServices;
	using System.Reflection;
	using GLib;
	using Gst;
	using Gst.Interfaces;

	public static class NavigationQuery {
		[DllImport("gstinterfaces-0.10.dll")]
		static extern int gst_navigation_query_get_type(IntPtr query);

		public static Gst.Interfaces.NavigationQueryType QueryGetType(Gst.Query query) {
			int raw_ret = gst_navigation_query_get_type(query == null ? IntPtr.Zero : query.Handle);
			Gst.Interfaces.NavigationQueryType ret = (Gst.Interfaces.NavigationQueryType) raw_ret;
			return ret;
		}

		[DllImport("gstinterfaces-0.10.dll")]
		static extern IntPtr gst_navigation_query_new_commands ();

		public static Gst.Query NewCommands () {
			Gst.Query query = (Gst.Query) GLib.Opaque.GetOpaque (gst_navigation_query_new_commands (), typeof (Gst.Query), true);
			return query;
		}

		[DllImport("gstinterfaces-0.10.dll")]
		static extern void gst_navigation_query_set_commandsv (IntPtr query, uint n_commands, int[] cmds);

		public static void SetCommands (Gst.Query query, Gst.Interfaces.NavigationCommand[] cmds) {
			if (!query.IsWritable)
				throw new ApplicationException ();

			int[] raw_cmds = new int[cmds.Length];
			for (int i = 0; i < cmds.Length; i++)
				raw_cmds[i] = (int) cmds[i];

			gst_navigation_query_set_commandsv (query.Handle, (uint) raw_cmds.Length, raw_cmds);
		}

		[DllImport("gstinterfaces-0.10.dll")]
		static extern bool gst_navigation_query_parse_commands_length (IntPtr query, out uint n_commands);
		[DllImport("gstinterfaces-0.10.dll")]
		static extern bool gst_navigation_query_parse_commands_nth (IntPtr query, uint nth, out int cmd);

		public static bool ParseCommands (Gst.Query query, out Gst.Interfaces.NavigationCommand[] cmds) {
			uint len;

			cmds = null;
			if (!gst_navigation_query_parse_commands_length (query.Handle, out len))
				return false;

			cmds = new Gst.Interfaces.NavigationCommand[len];

			for (uint i = 0; i < len; i++) {
				int cmd;

				if (!gst_navigation_query_parse_commands_nth (query.Handle, i, out cmd))
					return false;
				cmds[i] = (Gst.Interfaces.NavigationCommand) cmd;
			}

			return true;
		}

		[DllImport("gstinterfaces-0.10.dll")]
		static extern IntPtr gst_navigation_query_new_angles ();

		public static Gst.Query NewAngles () {
			Gst.Query query = (Gst.Query) GLib.Opaque.GetOpaque (gst_navigation_query_new_angles (), typeof (Gst.Query), true);
			return query;
		}

		[DllImport("gstinterfaces-0.10.dll")]
		static extern void gst_navigation_query_set_angles (IntPtr query, uint cur_angle, uint n_angles);

		public static void SetAngles (Gst.Query query, uint cur_angle, uint n_angles) {
			if (!query.IsWritable)
				throw new ApplicationException ();

			gst_navigation_query_set_angles (query.Handle, cur_angle, n_angles);
		}

		[DllImport("gstinterfaces-0.10.dll")]
		static extern bool gst_navigation_query_parse_angles (IntPtr query, out uint cur_angle, out uint n_angles);

		public static bool ParseAngles (Gst.Query query, out uint cur_angle, out uint n_angles) {
			return gst_navigation_query_parse_angles (query.Handle, out cur_angle, out n_angles);
		}
	}
}