通话质量

const delegate: ChannelDelegate = {
  onConnectionQualityChange: (channel, change: ConnectionQualityChange) => {
    // change.evaluation.overall / uplink / downlink
    // change.previous  上一次的等级
    this.qualityIcon = change.evaluation.overall;
  },
  onQualityReport: (channel, report: QualityReport) => {
    // report.pub 上行采样，report.sub 下行采样
    myMonitor.report(report);
  }
};

onActiveSpeakersChange: (channel, snapshot: ActiveSpeakersSnapshot) => {
  // snapshot.speakers: ActiveSpeakerInfo[]  含 uid / trackId / level
  this.speakingUids = snapshot.speakers.map((s: ActiveSpeakerInfo) => s.uid);
}

// 监听切换结果
onLayerSwitched: (channel, info: LayerSwitchedInfo) => {
  // info.subKey / fromTrackId / toTrackId / reason / latencyMs
}

// 主动切到指定层
channel.switchLayer(pubUid, trackId, targetTrackId);

// 查当前实际命中的是哪一层
const hit: string | undefined = channel.getSubscribeHit(uid, trackId);

import { TrackPriority, DegradationPreference, defaultVideoPublishOptions } from 'srtc';

const opts = defaultVideoPublishOptions();
opts.priority = TrackPriority.high;
opts.degradationPreference = DegradationPreference.maintainResolution;
await channel.publishLocalVideoTrack(camera, opts);

import { videoCodecNames, videoCodecReport, isCodecSupported, Codec } from 'srtc';

console.info(`codecs = [${videoCodecNames().join(', ')}]`);
console.info(`H264 = ${isCodecSupported(Codec.h264)}`);
videoCodecReport().forEach((line: string) => console.info(line));

发送: video/H264 [level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f]
发送: video/H265
发送: video/VP8
接收: video/H264 [level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=640c1f]
接收: video/H264 [level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f]

@State quality: ConnectionQuality = ConnectionQuality.unknown;
@State uplink: ConnectionQuality = ConnectionQuality.unknown;
@State downlink: ConnectionQuality = ConnectionQuality.unknown;

private delegate: ChannelDelegate = {
  onConnectionQualityChange: (channel, change: ConnectionQualityChange) => {
    this.quality = change.evaluation.overall;
    this.uplink = change.evaluation.uplink;
    this.downlink = change.evaluation.downlink;
  }
};