vidstack/dist/server/providers/html/native-audio-tracks.js

Build awesome media experiences on the web.

import { listenEvent } from 'maverick.js/std';
import { J as LIST_ADD, Q as LIST_REMOVE, L as LIST_SELECT } from '../../media-core.js';

class NativeAudioTracks {
  constructor(_provider, _context) {
    this._provider = _provider;
    this._context = _context;
    this._nativeTracks.onaddtrack = this._onAddNativeTrack.bind(this);
    this._nativeTracks.onremovetrack = this._onRemoveNativeTrack.bind(this);
    this._nativeTracks.onchange = this._onChangeNativeTrack.bind(this);
    listenEvent(this._context.audioTracks, "change", this._onChangeTrack.bind(this));
  }
  get _nativeTracks() {
    return this._provider.media.audioTracks;
  }
  _onAddNativeTrack(event) {
    const _track = event.track;
    if (_track.label === "")
      return;
    const audioTrack = {
      id: _track.id + "",
      label: _track.label,
      language: _track.language,
      kind: _track.kind,
      selected: false
    };
    this._context.audioTracks[LIST_ADD](audioTrack, event);
    if (_track.enabled)
      audioTrack.selected = true;
  }
  _onRemoveNativeTrack(event) {
    const track = this._context.audioTracks.getById(event.track.id);
    if (track)
      this._context.audioTracks[LIST_REMOVE](track, event);
  }
  _onChangeNativeTrack(event) {
    let enabledTrack = this._getEnabledNativeTrack();
    if (!enabledTrack)
      return;
    const track = this._context.audioTracks.getById(enabledTrack.id);
    if (track)
      this._context.audioTracks[LIST_SELECT](track, true, event);
  }
  _getEnabledNativeTrack() {
    return Array.from(this._nativeTracks).find((track) => track.enabled);
  }
  _onChangeTrack(event) {
    const { current } = event.detail;
    if (!current)
      return;
    const track = this._nativeTracks.getTrackById(current.id);
    if (track) {
      const prev = this._getEnabledNativeTrack();
      if (prev)
        prev.enabled = false;
      track.enabled = true;
    }
  }
}

export { NativeAudioTracks as N };