text: ﻿/*
   * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
   *
   * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
   *
   * Use of this source code is governed by MIT license that can be found in the
   * LICENSE file in the root of the source tree. All contributing project authors
   * may be found in the AUTHORS file in the root of the source tree.
   */
  
  #include "WebRtcEchoTest.h"
  
  WebRtcEchoTest::Ptr WebRtcEchoTest::create(const EventPoller::Ptr &poller) {
      WebRtcEchoTest::Ptr ret(new WebRtcEchoTest(poller), [](WebRtcEchoTest *ptr) {
          ptr->onDestory();
          delete ptr;
      });
      ret->onCreate();
      return ret;
  }
  
  WebRtcEchoTest::WebRtcEchoTest(const EventPoller::Ptr &poller) : WebRtcTransportImp(poller) {}
  
  void WebRtcEchoTest::onRtcConfigure(RtcConfigure &configure) const {
      WebRtcTransportImp::onRtcConfigure(configure);
      configure.audio.direction = configure.video.direction = RtpDirection::sendrecv;
  }
  
  void WebRtcEchoTest::onRtp(const char *buf, size_t len, uint64_t stamp_ms) {
      updateTicker();
      sendRtpPacket(buf, len, true, nullptr);
  }
  
  void WebRtcEchoTest::onRtcp(const char *buf, size_t len) {
      sendRtcpPacket(buf, len, true, nullptr);
  }
  
  //修改mline的a=msid属性，目的是在echo test的情况下，如果offer和answer的msid相同，chrome会忽略远端的track
  void WebRtcEchoTest::onCheckSdp(SdpType type, RtcSession &sdp) {
      if (type == SdpType::answer) {
          for (auto &m : sdp.media) {
              for (auto &ssrc : m.rtp_rtx_ssrc) {
                  ssrc.msid = "zlmediakit msid";
              }
          }
      }
  }