webrtc rtcp SenderReport

rtcp 中 的 SenderReport ，不多说了：

bool SenderReport::Parse(const CommonHeader& packet) {
  RTC_DCHECK_EQ(packet.type(), kPacketType);

  const uint8_t report_block_count = packet.count();
  if (packet.payload_size_bytes() <
      kSenderBaseLength + report_block_count * ReportBlock::kLength) {
    RTC_LOG(LS_WARNING) << "Packet is too small to contain all the data.";
    return false;
  }
  // Read SenderReport header.
  const uint8_t* const payload = packet.payload();
  sender_ssrc_ = ByteReader<uint32_t>::ReadBigEndian(&payload[0]);
  uint32_t secs = ByteReader<uint32_t>::ReadBigEndian(&payload[4]);
  uint32_t frac = ByteReader<uint32_t>::ReadBigEndian(&payload[8]);
  ntp_.Set(secs, frac);
  rtp_timestamp_ = ByteReader<uint32_t>::ReadBigEndian(&payload[12]);
  sender_packet_count_ = ByteReader<uint32_t>::ReadBigEndian(&payload[16]);
  sender_octet_count_ = ByteReader<uint32_t>::ReadBigEndian(&payload[20]);
  report_blocks_.resize(report_block_count);
  const uint8_t* next_block = payload + kSenderBaseLength;
  for (ReportBlock& block : report_blocks_) {
    bool block_parsed = block.Parse(next_block, ReportBlock::kLength);
    RTC_DCHECK(block_parsed);
    next_block += ReportBlock::kLength;
  }
  // Double check we didn't read beyond provided buffer.
  RTC_DCHECK_LE(next_block - payload,
                static_cast<ptrdiff_t>(packet.payload_size_bytes()));
  return true;
}

标签：count,SenderReport,ReadBigEndian,packet,payload,ByteReader,rtcp,webrtc,block
来源： https://blog.csdn.net/chinabinlang/article/details/101219286