text: /*
   * libjingle
   * Copyright 2010 Google Inc.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   *  1. Redistributions of source code must retain the above copyright notice,
   *     this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright notice,
   *     this list of conditions and the following disclaimer in the documentation
   *     and/or other materials provided with the distribution.
   *  3. The name of the author may not be used to endorse or promote products
   *     derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
   * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * A collection of functions and types for serializing and
   * deserializing Jingle session messages related to media.
   * Specificially, the <notify> and <view> messages.  They are not yet
   * standardized, but their current documentation can be found at:
   * goto/jinglemuc
   */
  
  #ifndef WEBRTC_LIBJINGLE_SESSION_MEDIA_MEDIAMESSAGES_H_
  #define WEBRTC_LIBJINGLE_SESSION_MEDIA_MEDIAMESSAGES_H_
  
  #include <string>
  #include <vector>
  
  #include "talk/media/base/mediachannel.h"  // For RtpHeaderExtension
  #include "talk/media/base/streamparams.h"
  #include "webrtc/base/basictypes.h"
  #include "webrtc/libjingle/session/parsing.h"
  #include "webrtc/p2p/base/sessiondescription.h"
  
  namespace cricket {
  
  // If the parent element (usually <jingle>) is a jingle view.
  bool IsJingleViewRequest(const buzz::XmlElement* action_elem);
  
  // Parses a view request from the parent element (usually
  // <jingle>). If it fails, it returns false and fills an error
  // message.
  bool ParseJingleViewRequest(const buzz::XmlElement* action_elem,
                              ViewRequest* view_request,
                              ParseError* error);
  
  // Serializes a view request to XML.  If it fails, returns false and
  // fills in an error message.
  bool WriteJingleViewRequest(const std::string& content_name,
                              const ViewRequest& view,
                              XmlElements* elems,
                              WriteError* error);
  
  // TODO(pthatcher): Get rid of legacy source notify and replace with
  // description-info as soon as reflector is capable of sending it.
  bool IsSourcesNotify(const buzz::XmlElement* action_elem);
  
  // If the given elem has <streams>.
  bool HasJingleStreams(const buzz::XmlElement* desc_elem);
  
  // Parses streams from a jingle <description>.  If it fails, returns
  // false and fills an error message.
  bool ParseJingleStreams(const buzz::XmlElement* desc_elem,
                          std::vector<StreamParams>* streams,
                          ParseError* error);
  
  // Write a <streams> element to the parent_elem.
  void WriteJingleStreams(const std::vector<StreamParams>& streams,
                          buzz::XmlElement* parent_elem);
  
  // Parses rtp header extensions from a jingle <description>.  If it
  // fails, returns false and fills an error message.
  bool ParseJingleRtpHeaderExtensions(
      const buzz::XmlElement* desc_elem,
      std::vector<RtpHeaderExtension>* hdrexts,
      ParseError* error);
  
  // Writes <rtp-hdrext> elements to the parent_elem.
  void WriteJingleRtpHeaderExtensions(
      const std::vector<RtpHeaderExtension>& hdrexts,
      buzz::XmlElement* parent_elem);
  
  }  // namespace cricket
  
  #endif  // WEBRTC_LIBJINGLE_SESSION_MEDIA_MEDIAMESSAGES_H_
  