av/cmd/audio-player/main.js

/*
NAME
  main.js

AUTHOR
  Trek Hopton <trek@ausocean.org>

LICENSE
  This file is Copyright (C) 2018 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License in gpl.txt.
  If not, see [GNU licenses](http://www.gnu.org/licenses).
*/

window.onload = function () {

    document.getElementById('input').addEventListener('change', function () {
        const input = event.target.files[0]
        const reader = new FileReader()

        reader.onload = event => {
            bytes = new Uint8Array(event.target.result)

            // decode adpcm to pcm
            var decoded = decode(Array.from(bytes))

            // convert raw pcm to wav
            var wav = pcmToWav(decoded, 48000, 1, 16);

            // play wav data in player
            const blob = new Blob([Uint8Array.from(wav)], {
                type: 'audio/wav'
            });
            const url = URL.createObjectURL(blob);

            const audio = document.getElementById('audio');
            const source = document.getElementById('source');

            source.src = url;
            audio.load();
            audio.play();
        }
        reader.onerror = error => reject(error)
        reader.readAsArrayBuffer(input)

    })
}