dom/base/test/file_webaudioLoop.html


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<!DOCTYPE html>
<script>
var ac = new AudioContext();
var runningPromise = new Promise(resolve => {
  ac.onstatechange = event => {
    if (ac.state == "running") {
      resolve();
    }
  };
});
fetch("audio.ogg").then(response => {
  return response.arrayBuffer();
}).then(ab => {
  return ac.decodeAudioData(ab);
}).then(ab => {
  var src = ac.createBufferSource();
  src.buffer = ab;
  src.loop = true;
  src.loopStart = 0;
  src.loopEnd = ab.duration;
  src.start();
  src.connect(ac.destination);
});

var suspendPromise;
function suspendAC() {
  runningPromise.then(() => {
    suspendPromise = ac.suspend();
  });
}

var resumePromise;
function resumeAC() {
  suspendPromise.then(() => {
    resumePromise = ac.resume();
  });
}

function closeAC() {
  resumePromise.then(() => {
    ac.close();
  });
}
</script>