rx-player/src/compat/enable_audio_track.ts

Canal+ HTML5 Video Player

import type { ICompatAudioTrack } from "./browser_compatibility_types";
import EnvDetector from "./env_detector";

/**
 * Enable the audio track at the given index while disabling all others in the
 * `audioTracks` array.
 *
 * Returns false if the given index is not found in the `audioTracks` array.
 * @param {array.<audioTrack>} audioTracks
 * @param {number} indexToEnable
 * @returns {boolean}
 */
export default function enableAudioTrack(
  audioTracks: ICompatAudioTrack[],
  indexToEnable: number,
): boolean {
  // Seen on Safari MacOS only (2022-02-14), not disabling ALL audio tracks
  // first (even the wanted one), can lead to the media not playing.
  for (let i = 0; i < audioTracks.length; i++) {
    // However, Tizen just plays no audio if it is disabled then enabled
    // synchronously (2022-10-12)
    if (EnvDetector.device !== EnvDetector.DEVICES.Tizen || i !== indexToEnable) {
      audioTracks[i].enabled = false;
    }
  }

  if (indexToEnable < 0 || indexToEnable >= audioTracks.length) {
    return false;
  }

  audioTracks[indexToEnable].enabled = true;
  return true;
}