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/*
* Copyright (C) 2013 Cable Television Laboratories, Inc.
*
* Author: Craig Pratt <craig@ecaspia.com>
*
* This file is part of Rygel.
*
* Rygel is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Rygel 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
public errordomain Rygel.PlaySpeedError {
INVALID_SPEED_FORMAT,
SPEED_NOT_PRESENT
}
/**
* This class represents a DLNA PlaySpeed request (PlaySpeed.dlna.org)
*/
public class Rygel.PlaySpeedRequest : GLib.Object {
public const string PLAYSPEED_HEADER = "PlaySpeed.dlna.org";
public PlaySpeed speed { get; private set; }
/**
* Return true if playspeed is supported
*
* This method utilizes elements associated with the request to determine
* if a PlaySpeed request is supported for the given request/resource.
*/
public static bool supported (HTTPGet request) {
return request.handler.supports_playspeed ();
}
internal static bool requested (HTTPGet request) {
return request.msg.get_request_headers ().get_one (PLAYSPEED_HEADER) != null;
}
public PlaySpeedRequest (int numerator, uint denominator) {
base ();
this.speed = new PlaySpeed (numerator, denominator);
}
public PlaySpeedRequest.from_string (string speed) throws PlaySpeedError {
base ();
this.speed = new PlaySpeed.from_string (speed);
}
internal PlaySpeedRequest.from_request (Rygel.HTTPGet request)
throws PlaySpeedError {
base ();
// Format: PlaySpeed.dlna.org: speed=<rate>
string speed_string = request.msg.get_request_headers ().get_one
(PLAYSPEED_HEADER);
if (speed_string == null) {
var msg = /*_*/("Could not find playspeed header %s");
throw new PlaySpeedError.SPEED_NOT_PRESENT (msg, PLAYSPEED_HEADER);
}
var elements = speed_string.split ("=");
if ((elements.length != 2) || (elements[0] != "speed")) {
var msg = /*_*/("Ill-formed value for header %s: %s");
throw new PlaySpeedError.INVALID_SPEED_FORMAT (msg,
PLAYSPEED_HEADER,
speed_string);
}
speed = new PlaySpeed.from_string (elements[1]);
// Normal rate is always valid. Just check for valid scaled rate
if (!speed.is_normal_rate ()) {
// Validate if playspeed is listed in the protocolInfo
var resource_handler = request.handler as HTTPMediaResourceHandler;
if (resource_handler != null) {
var resource = resource_handler.media_resource;
var speeds = resource.play_speeds;
var found_speed = false;
foreach (var speed in speeds) {
var cur_speed = new PlaySpeedRequest.from_string (speed);
if (this.equals (cur_speed)) {
found_speed = true;
break;
}
}
if (!found_speed) {
throw new PlaySpeedError
.SPEED_NOT_PRESENT ("Unknown playspeed requested (%s)",
speed_string);
}
}
}
}
public bool equals (PlaySpeedRequest that) {
if (that == null) return false;
return (this.speed.equals (that.speed));
}
}
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