matrix-js-sdk/lib/webrtc/stats/media/mediaTrackStatsHandler.js

Matrix Client-Server SDK for Javascript

import _defineProperty from "@babel/runtime/helpers/defineProperty";
/*
Copyright 2023 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import { MediaTrackStats } from "./mediaTrackStats.js";
export class MediaTrackStatsHandler {
  constructor(mediaSsrcHandler, mediaTrackHandler) {
    this.mediaSsrcHandler = mediaSsrcHandler;
    this.mediaTrackHandler = mediaTrackHandler;
    _defineProperty(this, "track2stats", new Map());
  }

  /**
   * Find tracks by rtc stats
   * Argument report is any because the stats api is not consistent:
   * For example `trackIdentifier`, `mid` not existing in every implementations
   * https://www.w3.org/TR/webrtc-stats/#dom-rtcinboundrtpstreamstats
   * https://developer.mozilla.org/en-US/docs/Web/API/RTCInboundRtpStreamStats
   */
  findTrack2Stats(report, type) {
    var trackID;
    if (report.trackIdentifier) {
      trackID = report.trackIdentifier;
    } else if (report.mid) {
      trackID = type === "remote" ? this.mediaTrackHandler.getRemoteTrackIdByMid(report.mid) : this.mediaTrackHandler.getLocalTrackIdByMid(report.mid);
    } else if (report.ssrc) {
      var mid = this.mediaSsrcHandler.findMidBySsrc(report.ssrc, type);
      if (!mid) {
        return undefined;
      }
      trackID = type === "remote" ? this.mediaTrackHandler.getRemoteTrackIdByMid(report.mid) : this.mediaTrackHandler.getLocalTrackIdByMid(report.mid);
    }
    if (!trackID) {
      return undefined;
    }
    var trackStats = this.track2stats.get(trackID);
    if (!trackStats) {
      var track = this.mediaTrackHandler.getTackById(trackID);
      if (track !== undefined) {
        var kind = track.kind === "audio" ? track.kind : "video";
        trackStats = new MediaTrackStats(trackID, type, kind);
        this.track2stats.set(trackID, trackStats);
      } else {
        return undefined;
      }
    }
    return trackStats;
  }
  findLocalVideoTrackStats(report) {
    var localVideoTracks = this.mediaTrackHandler.getLocalTracks("video");
    if (localVideoTracks.length === 0) {
      return undefined;
    }
    return this.findTrack2Stats(report, "local");
  }
  getTrack2stats() {
    return this.track2stats;
  }
  findTransceiverByTrackId(trackID) {
    return this.mediaTrackHandler.getTransceiverByTrackId(trackID);
  }
}
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