examples: websocket-server updates
This commit is contained in:
Aleix Conchillo Flaqué
@@ -1,134 +1,197 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
|
||||
<head>
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<script src="https://cdn.jsdelivr.net/npm/protobufjs@7.X.X/dist/protobuf.min.js"></script>
|
||||
<title>WebSocket Audio Stream</title>
|
||||
</head>
|
||||
<title>Pipecat WebSocket Client Example</title>
|
||||
</head>
|
||||
|
||||
<body>
|
||||
<h1>WebSocket Audio Stream</h1>
|
||||
<body>
|
||||
<h1>Pipecat WebSocket Client Example</h1>
|
||||
<h3><div id="progressText">Loading, wait...</div></h2>
|
||||
<button id="startAudioBtn">Start Audio</button>
|
||||
<button id="stopAudioBtn">Stop Audio</button>
|
||||
<script>
|
||||
const SAMPLE_RATE = 16000;
|
||||
const BUFFER_SIZE = 8192;
|
||||
const MIN_AUDIO_SIZE = 6400;
|
||||
const SAMPLE_RATE = 16000;
|
||||
const NUM_CHANNELS = 1;
|
||||
|
||||
let audioContext;
|
||||
let microphoneStream;
|
||||
let scriptProcessor;
|
||||
let source;
|
||||
let frame;
|
||||
let audioChunks = [];
|
||||
let isPlaying = false;
|
||||
let ws;
|
||||
// The protobuf type. We will load it later.
|
||||
let Frame = null;
|
||||
|
||||
const proto = protobuf.load("frames.proto", (err, root) => {
|
||||
if (err) throw err;
|
||||
frame = root.lookupType("pipecat.Frame");
|
||||
});
|
||||
// The websocket connection.
|
||||
let ws = null;
|
||||
|
||||
function initWebSocket() {
|
||||
ws = new WebSocket('ws://localhost:8765');
|
||||
// The audio context
|
||||
let audioContext = null;
|
||||
|
||||
ws.addEventListener('open', () => console.log('WebSocket connection established.'));
|
||||
ws.addEventListener('message', handleWebSocketMessage);
|
||||
ws.addEventListener('close', (event) => console.log("WebSocket connection closed.", event.code, event.reason));
|
||||
ws.addEventListener('error', (event) => console.error('WebSocket error:', event));
|
||||
}
|
||||
// The audio context media stream source
|
||||
let source = null;
|
||||
|
||||
async function handleWebSocketMessage(event) {
|
||||
const arrayBuffer = await event.data.arrayBuffer();
|
||||
enqueueAudioFromProto(arrayBuffer);
|
||||
}
|
||||
// The microphone stream from getUserMedia. SHould be sampled to the
|
||||
// proper sample rate.
|
||||
let microphoneStream = null;
|
||||
|
||||
function enqueueAudioFromProto(arrayBuffer) {
|
||||
const parsedFrame = frame.decode(new Uint8Array(arrayBuffer));
|
||||
if (!parsedFrame?.audio) return false;
|
||||
// Script processor to get data from microphone.
|
||||
let scriptProcessor = null;
|
||||
|
||||
const frameCount = parsedFrame.audio.data.length / 2;
|
||||
const audioOutBuffer = audioContext.createBuffer(1, frameCount, SAMPLE_RATE);
|
||||
const nowBuffering = audioOutBuffer.getChannelData(0);
|
||||
const view = new Int16Array(parsedFrame.audio.data.buffer);
|
||||
// AudioContext play time.
|
||||
let playTime = 0;
|
||||
|
||||
for (let i = 0; i < frameCount; i++) {
|
||||
const word = view[i];
|
||||
nowBuffering[i] = ((word + 32768) % 65536 - 32768) / 32768.0;
|
||||
}
|
||||
// Whether we should be playing audio.
|
||||
let isPlaying = false;
|
||||
|
||||
audioChunks.push(audioOutBuffer);
|
||||
if (!isPlaying) playNextChunk();
|
||||
}
|
||||
let startBtn = document.getElementById('startAudioBtn');
|
||||
let stopBtn = document.getElementById('stopAudioBtn');
|
||||
|
||||
function playNextChunk() {
|
||||
if (audioChunks.length === 0) {
|
||||
isPlaying = false;
|
||||
return;
|
||||
}
|
||||
const proto = protobuf.load("frames.proto", (err, root) => {
|
||||
if (err) {
|
||||
throw err;
|
||||
}
|
||||
Frame = root.lookupType("pipecat.Frame");
|
||||
const progressText = document.getElementById("progressText");
|
||||
progressText.textContent = "We are ready! Make sure to run the server and then click `Start Audio`.";
|
||||
|
||||
isPlaying = true;
|
||||
const audioOutBuffer = audioChunks.shift();
|
||||
const source = audioContext.createBufferSource();
|
||||
source.buffer = audioOutBuffer;
|
||||
source.connect(audioContext.destination);
|
||||
source.onended = playNextChunk;
|
||||
source.start();
|
||||
}
|
||||
startBtn.disabled = false;
|
||||
stopBtn.disabled = true;
|
||||
});
|
||||
|
||||
function startAudio() {
|
||||
if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
|
||||
alert('getUserMedia is not supported in your browser.');
|
||||
return;
|
||||
}
|
||||
function initWebSocket() {
|
||||
ws = new WebSocket('ws://localhost:8765');
|
||||
|
||||
navigator.mediaDevices.getUserMedia({ audio: true })
|
||||
.then((stream) => {
|
||||
microphoneStream = stream;
|
||||
audioContext = new (window.AudioContext || window.webkitAudioContext)();
|
||||
scriptProcessor = audioContext.createScriptProcessor(BUFFER_SIZE, 1, 1);
|
||||
source = audioContext.createMediaStreamSource(stream);
|
||||
source.connect(scriptProcessor);
|
||||
scriptProcessor.connect(audioContext.destination);
|
||||
ws.addEventListener('open', () => console.log('WebSocket connection established.'));
|
||||
ws.addEventListener('message', handleWebSocketMessage);
|
||||
ws.addEventListener('close', (event) => {
|
||||
console.log("WebSocket connection closed.", event.code, event.reason);
|
||||
stopAudio(false);
|
||||
});
|
||||
ws.addEventListener('error', (event) => console.error('WebSocket error:', event));
|
||||
}
|
||||
|
||||
const audioBuffer = [];
|
||||
const skipRatio = Math.floor(audioContext.sampleRate / (SAMPLE_RATE * 2));
|
||||
async function handleWebSocketMessage(event) {
|
||||
const arrayBuffer = await event.data.arrayBuffer();
|
||||
if (isPlaying) {
|
||||
enqueueAudioFromProto(arrayBuffer);
|
||||
}
|
||||
}
|
||||
|
||||
scriptProcessor.onaudioprocess = (event) => {
|
||||
const rawLeftChannelData = event.inputBuffer.getChannelData(0);
|
||||
for (let i = 0; i < rawLeftChannelData.length; i += skipRatio) {
|
||||
const normalized = ((rawLeftChannelData[i] * 32768.0) + 32768) % 65536 - 32768;
|
||||
const swappedBytes = ((normalized & 0xff) << 8) | ((normalized >> 8) & 0xff);
|
||||
audioBuffer.push(swappedBytes);
|
||||
}
|
||||
function enqueueAudioFromProto(arrayBuffer) {
|
||||
const parsedFrame = Frame.decode(new Uint8Array(arrayBuffer));
|
||||
if (!parsedFrame?.audio) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (audioBuffer.length >= MIN_AUDIO_SIZE) {
|
||||
const audioFrame = frame.create({ audio: { audio: audioBuffer.slice(0, MIN_AUDIO_SIZE) } });
|
||||
const encodedFrame = new Uint8Array(frame.encode(audioFrame).finish());
|
||||
ws.send(encodedFrame);
|
||||
audioBuffer.splice(0, MIN_AUDIO_SIZE);
|
||||
}
|
||||
};
|
||||
if (playTime == 0) {
|
||||
playTime = audioContext.currentTime;
|
||||
}
|
||||
|
||||
initWebSocket();
|
||||
})
|
||||
.catch((error) => console.error('Error accessing microphone:', error));
|
||||
}
|
||||
// We should be able to use parsedFrame.audio.audio.buffer but for
|
||||
// some reason that contains all the bytes from the protobuf message.
|
||||
const audioVector = Array.from(parsedFrame.audio.audio);
|
||||
const audioArray = new Uint8Array(audioVector);
|
||||
|
||||
function stopAudio() {
|
||||
if (ws) {
|
||||
ws.close();
|
||||
scriptProcessor.disconnect();
|
||||
source.disconnect();
|
||||
ws = undefined;
|
||||
}
|
||||
}
|
||||
audioContext.decodeAudioData(audioArray.buffer, function(buffer) {
|
||||
const source = new AudioBufferSourceNode(audioContext);
|
||||
source.buffer = buffer;
|
||||
source.start(playTime);
|
||||
source.connect(audioContext.destination);
|
||||
playTime = playTime + buffer.duration;
|
||||
});
|
||||
}
|
||||
|
||||
document.getElementById('startAudioBtn').addEventListener('click', startAudio);
|
||||
document.getElementById('stopAudioBtn').addEventListener('click', stopAudio);
|
||||
function convertFloat32ToS16PCM(float32Array) {
|
||||
let int16Array = new Int16Array(float32Array.length);
|
||||
|
||||
for (let i = 0; i < float32Array.length; i++) {
|
||||
let clampedValue = Math.max(-1, Math.min(1, float32Array[i]));
|
||||
int16Array[i] = clampedValue < 0 ? clampedValue * 32768 : clampedValue * 32767;
|
||||
}
|
||||
return int16Array;
|
||||
}
|
||||
|
||||
function startAudioBtnHandler() {
|
||||
if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
|
||||
alert('getUserMedia is not supported in your browser.');
|
||||
return;
|
||||
}
|
||||
|
||||
startBtn.disabled = true;
|
||||
stopBtn.disabled = false;
|
||||
|
||||
audioContext = new (window.AudioContext || window.webkitAudioContext)({
|
||||
latencyHint: "interactive",
|
||||
sampleRate: SAMPLE_RATE
|
||||
});
|
||||
|
||||
isPlaying = true;
|
||||
|
||||
initWebSocket();
|
||||
|
||||
navigator.mediaDevices.getUserMedia({
|
||||
audio: {
|
||||
sampleRate: SAMPLE_RATE,
|
||||
channelCount: NUM_CHANNELS,
|
||||
autoGainControl: true,
|
||||
echoCancellation: true,
|
||||
noiseSuppression: true,
|
||||
}
|
||||
}).then((stream) => {
|
||||
microphoneStream = stream;
|
||||
// 512 is closest thing to 200ms.
|
||||
scriptProcessor = audioContext.createScriptProcessor(512, 1, 1);
|
||||
source = audioContext.createMediaStreamSource(stream);
|
||||
source.connect(scriptProcessor);
|
||||
scriptProcessor.connect(audioContext.destination);
|
||||
|
||||
scriptProcessor.onaudioprocess = (event) => {
|
||||
if (!ws) {
|
||||
return;
|
||||
}
|
||||
|
||||
const audioData = event.inputBuffer.getChannelData(0);
|
||||
const pcmS16Array = convertFloat32ToS16PCM(audioData);
|
||||
const pcmByteArray = new Uint8Array(pcmS16Array.buffer);
|
||||
const frame = Frame.create({
|
||||
audio: {
|
||||
audio: Array.from(pcmByteArray),
|
||||
sampleRate: SAMPLE_RATE,
|
||||
numChannels: NUM_CHANNELS
|
||||
}
|
||||
});
|
||||
const encodedFrame = new Uint8Array(Frame.encode(frame).finish());
|
||||
ws.send(encodedFrame);
|
||||
};
|
||||
}).catch((error) => console.error('Error accessing microphone:', error));
|
||||
}
|
||||
|
||||
function stopAudio(closeWebsocket) {
|
||||
isPlaying = false;
|
||||
startBtn.disabled = false;
|
||||
stopBtn.disabled = true;
|
||||
|
||||
if (ws && closeWebsocket) {
|
||||
ws.close();
|
||||
ws = null;
|
||||
}
|
||||
|
||||
if (scriptProcessor) {
|
||||
scriptProcessor.disconnect();
|
||||
}
|
||||
if (source) {
|
||||
source.disconnect();
|
||||
}
|
||||
}
|
||||
|
||||
function stopAudioBtnHandler() {
|
||||
stopAudio(true);
|
||||
}
|
||||
|
||||
startBtn.addEventListener('click', startAudioBtnHandler);
|
||||
stopBtn.addEventListener('click', stopAudioBtnHandler);
|
||||
startBtn.disabled = true;
|
||||
stopBtn.disabled = true;
|
||||
</script>
|
||||
</body>
|
||||
</body>
|
||||
|
||||
</html>
|
||||
|
||||
Reference in New Issue
Block a user