Optimize FindCodecById and ReferencedCodecsMatch

webrtc/media/base/rtpdataengine.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 207 matching lines @@
       packet->cdata<char>() + header_length + sizeof(kReservedSpace);
   size_t data_len = packet->size() - header_length - sizeof(kReservedSpace);
 
   if (!receiving_) {
     LOG(LS_WARNING) << "Not receiving packet "
                     << header.ssrc << ":" << header.seq_num
                     << " before SetReceive(true) called.";
     return;
   }
 
-  DataCodec codec;
-  if (!FindCodecById(recv_codecs_, header.payload_type, &codec)) {
+  if (!FindCodecById(recv_codecs_, header.payload_type)) {
     // For bundling, this will be logged for every message.
     // So disable this logging.
     // LOG(LS_WARNING) << "Not receiving packet "
     //                << header.ssrc << ":" << header.seq_num
     //                << " (" << data_len << ")"
     //                << " because unknown payload id: " << header.payload_type;
     return;
   }
 
   if (!GetStreamBySsrc(recv_streams_, header.ssrc)) {
@@ skipping 97 matching lines @@
 
   MediaChannel::SendPacket(&packet, rtc::PacketOptions());
   send_limiter_->Use(packet_len, now);
   if (result) {
     *result = SDR_SUCCESS;
   }
   return true;
 }
 
 }  // namespace cricket