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<!DOCTYPE html>
<html>
<body>
<script>
var context;
var oscillator;
var scriptProcessor;
var isFirst = true;
function startPlaying()
{
if (context)
context.close();
isFirst = true;
return new Promise(function(resolve, reject) {
context = new AudioContext();
oscillator = new OscillatorNode(context);
scriptProcessor = context.createScriptProcessor();
oscillator.connect(scriptProcessor);
scriptProcessor.connect(context.destination);
scriptProcessor.onaudioprocess = (event) => {
if (isFirst) {
resolve();
isFirst = false;
}
let inputBuffer = event.inputBuffer;
let outputBuffer = event.outputBuffer;
for (let channel = 0; channel < outputBuffer.numberOfChannels; channel++) {
let inputData = inputBuffer.getChannelData(channel);
let outputData = outputBuffer.getChannelData(channel);
for (let sample = 0; sample < inputBuffer.length; sample++)
outputData[sample] = inputData[sample];
}
};
oscillator.start();
});
}
function generateAudioInMediaStreamTrack()
{
if (context)
context.close();
context = new AudioContext();
oscillator = new OscillatorNode(context);
const mediaStreamDestination = context.createMediaStreamDestination();
oscillator.connect(mediaStreamDestination);
oscillator.start();
}
function transitionAudioToSpeakers()
{
if (context)
oscillator.connect(context.destination);
}
</script>
</body>
</html>
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