rid_description.h | Explore in Territory

/*
 *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef MEDIA_BASE_RID_DESCRIPTION_H_
#define MEDIA_BASE_RID_DESCRIPTION_H_

#include <map>
#include <string>
#include <vector>

namespace cricket {

enum class RidDirection { … };

// Description of a Restriction Id (RID) according to:
// https://tools.ietf.org/html/draft-ietf-mmusic-rid-15
// A Restriction Identifier serves two purposes:
//   1. Uniquely identifies an RTP stream inside an RTP session.
//      When combined with MIDs (https://tools.ietf.org/html/rfc5888),
//      RIDs uniquely identify an RTP stream within an RTP session.
//      The MID will identify the media section and the RID will identify
//      the stream within the section.
//      RID identifiers must be unique within the media section.
//   2. Allows indicating further restrictions to the stream.
//      These restrictions are added according to the direction specified.
//      The direction field identifies the direction of the RTP stream packets
//      to which the restrictions apply. The direction is independent of the
//      transceiver direction and can be one of {send, recv}.
//      The following are some examples of these restrictions:
//        a. max-width, max-height, max-fps, max-br, ...
//        b. further restricting the codec set (from what m= section specified)
//
// Note: Indicating dependencies between streams (using depend) will not be
// supported, since the WG is adopting a different approach to achieve this.
// As of 2018-12-04, the new SVC (Scalable Video Coder) approach is still not
// mature enough to be implemented as part of this work.
// See: https://w3c.github.io/webrtc-svc/ for more details.
struct RidDescription final { … };

}  // namespace cricket

#endif  // MEDIA_BASE_RID_DESCRIPTION_H_
chromium/third_party/webrtc/media/base/rid_description.h
