chromium/third_party/webrtc/modules/rtp_rtcp/source/rtcp_packet/loss_notification.cc

/*
 *  Copyright (c) 2019 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.
 */

#include "modules/rtp_rtcp/source/rtcp_packet/loss_notification.h"

#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/rtp_rtcp/source/rtcp_packet/common_header.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"

namespace webrtc {
namespace rtcp {

// Loss Notification
// -----------------
//     0                   1                   2                   3
//     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//    |V=2|P| FMT=15  |   PT=206      |             length            |
//    +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
//  0 |                  SSRC of packet sender                        |
//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//  4 |                  SSRC of media source                         |
//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
//  8 |  Unique identifier 'L' 'N' 'T' 'F'                            |
//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 12 | Last Decoded Sequence Number  | Last Received SeqNum Delta  |D|
//    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

LossNotification::LossNotification()
    : … { … }

LossNotification::LossNotification(uint16_t last_decoded,
                                   uint16_t last_received,
                                   bool decodability_flag)
    : … { … }

LossNotification::LossNotification(const LossNotification& rhs) = default;

LossNotification::~LossNotification() = default;

size_t LossNotification::BlockLength() const { … }

bool LossNotification::Create(uint8_t* packet,
                              size_t* index,
                              size_t max_length,
                              PacketReadyCallback callback) const { … }

bool LossNotification::Parse(const CommonHeader& packet) { … }

bool LossNotification::Set(uint16_t last_decoded,
                           uint16_t last_received,
                           bool decodability_flag) { … }

}  // namespace rtcp
}  // namespace webrtc