通话质量检测

BRTC 提供 onStatistics 回调事件，它会每隔两秒钟一次向应用层上报当前网络质量，其参数包括本地推流和远端拉流质量两个部分：

示例代码

class BRTCCore : public BRTCCallback, public BRTCAudioFrameCallback {
 public:
   // interface BRTCCallback
   void onStatistics(const BRTCStatistics& statistics) override;

 private:
   BRTC* m_pBrtc = nullptr;
}

void BRTCCore::onStatistics(const BRTCStatistics& statistics) {
  std::string info;
  info.append("\nupLoss: ")
      .append(rtc::ToString(statistics.upLoss))
      .append("\ndownLoss: ")
      .append(rtc::ToString(statistics.downLoss))
      .append("\ncpu: ")
      .append(rtc::ToString(statistics.cpu))
      .append("\nrtt: ")
      .append(rtc::ToString(statistics.rtt));
  if (statistics.localStatisticsArray != nullptr && statistics.localStatisticsArraySize != 0) {
    for (int i = 0; i < static_cast<int>(statistics.localStatisticsArraySize); i++) {
      info.append("\nvideoBitrate: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].videoBitrate))
        .append("\naudioBitrate: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].audioBitrate))
        .append("\nwidth: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].width))
        .append("\nheight: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].height))
        .append("\nfps: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].frameRate))
        .append("\navailableSendBandwidth: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].availableSendBandwidth))
        .append("\nstreamType: ")
        .append(rtc::ToString(statistics.localStatisticsArray[i].streamType));
    }
  }

  if (statistics.remoteStatisticsArray != nullptr && statistics.remoteStatisticsArraySize != 0) {
    for (int i = 0; i < static_cast<int>(statistics.remoteStatisticsArraySize); i++) {
      info.append("\nremote userId: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].userId));
      info.append("\nremote videoBitrate: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].videoBitrate))
        .append("\nremote audioBitrate: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].audioBitrate))
        .append("\nremote width: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].width))
        .append("\nremote height: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].height))
        .append("\nremote fps: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].frameRate))
        .append("\nremote availableRecvBandwidth: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].availableRecvBandwidth));
        .append("\nremote streamType: ")
        .append(rtc::ToString(statistics.remoteStatisticsArray[i].streamType));
    }
  }
  LOG(INFO) << "received statistic:" << info;
}

流类型 BRTCVideoStreamType 定义如下：

• BRTCVideoStreamTypeBig(0): 主画面视频流
• BRTCVideoStreamTypeSmall(1): 小画面视频流
• BRTCVideoStreamTypeSub(2): 辅流（屏幕分享）