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<!DOCTYPE html>
<html>
<head>
<script>
let context;
let oscillator;
let stream;
let gain;
function sendMessage(message)
{
try {
if (window.webkit)
window.webkit.messageHandlers.testHandler.postMessage(message);
else
console.log(`MESSAGE - ${message}`);
} catch(err) {
console.log(`failed to send message ${message}: ${err}`);
}
}
function createWebAudioNode()
{
context = new AudioContext();
gain = new GainNode(context, {gain: 0.05});
gain.connect(context.destination);
oscillator = new OscillatorNode(context);
oscillator.connect(gain);
oscillator.start();
}
function disconnectWebAudioNode()
{
oscillator.stop();
oscillator.disconnect();
gain.disconnect();
context.close();
}
async function startCapture()
{
stream = await navigator.mediaDevices.getUserMedia({ video: true, audio: { volume: 0.05 } });
}
function stopCapture()
{
stream.getTracks().forEach(track => track.stop());
}
async function playVideo()
{
let video = document.getElementsByTagName('video')[0];
video.src = 'test-mse.mp4';
video.volume = 0.05;
await video.play();
sendMessage('playing');
}
function pauseVideo()
{
video = document.getElementsByTagName('video')[0].pause();
}
</script>
<head>
<body>
<video controls></video>
<br>
<button onclick="createWebAudioNode()">Create Audio Node</button>
<button onclick="disconnectWebAudioNode()">Disconnect Audio Node</button>
<br>
<button onclick="startCapture()">Start Capture</button>
<button onclick="stopCapture()">Stop Capture</button>
<br>
<button onclick="playVideo()">Play <video></button>
<button onclick="pauseVideo()">Pause <video></button>
</body>
</html>
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