Replace const -> constexpr for rtcp Packet Type

webrtc/modules/rtp_rtcp/source/rtcp_packet/bye.cc

 /*
  *  Copyright (c) 2015 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 "webrtc/modules/rtp_rtcp/source/rtcp_packet/bye.h"
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/common_header.h"
 
 namespace webrtc {
 namespace rtcp {
-
+constexpr uint8_t Bye::kPacketType;
 // Bye packet (BYE) (RFC 3550).
 //
 //        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|    SC   |   PT=BYE=203  |             length            |
 //       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 //       |                           SSRC/CSRC                           |
 //       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 //       :                              ...                              :
 //       +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
 // (opt) |     length    |               reason for leaving            ...
 //       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 Bye::Bye() : sender_ssrc_(0) {}
 
 bool Bye::Parse(const CommonHeader& packet) {
-  RTC_DCHECK(packet.type() == kPacketType);
+  RTC_DCHECK_EQ(packet.type(), kPacketType);
 
   const uint8_t src_count = packet.count();
   // Validate packet.
   if (packet.payload_size_bytes() < 4u * src_count) {
     LOG(LS_WARNING)
         << "Packet is too small to contain CSRCs it promise to have.";
     return false;
   }
   const uint8_t* const payload = packet.payload();
   bool has_reason = packet.payload_size_bytes() > 4u * src_count;
@@ skipping 77 matching lines @@
 }
 
 size_t Bye::BlockLength() const {
   size_t src_count = (1 + csrcs_.size());
   size_t reason_size_in_32bits = reason_.empty() ? 0 : (reason_.size() / 4 + 1);
   return kHeaderLength + 4 * (src_count + reason_size_in_32bits);
 }
 
 }  // namespace rtcp
 }  // namespace webrtc