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legop3
2026-01-13 18:34:46 -05:00
parent 32f9a2befc
commit fb00467106
1 changed files with 7 additions and 2 deletions
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server/src/services/roomCameraSnapshotService.js
+7 -2
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@@ -12,6 +12,8 @@ const cameraState = new Map(); // id -> {frame, ts, error, failures, fetching}
const events = new EventEmitter(); // frame, status const events = new EventEmitter(); // frame, status
let pollTimer = null; let pollTimer = null;
const streamState = new Map(); // id -> { req, reconnectTimer } const streamState = new Map(); // id -> { req, reconnectTimer }
const JPEG_START = Buffer.from([0xff, 0xd8]);
const JPEG_END = Buffer.from([0xff, 0xd9]);
function markState(id, updates = {}) { function markState(id, updates = {}) {
const prev = cameraState.get(id) || {}; const prev = cameraState.get(id) || {};
@@ -89,14 +91,17 @@ function startStream(camera) {
res.on('data', (chunk) => { res.on('data', (chunk) => {
buffer = Buffer.concat([buffer, chunk]); buffer = Buffer.concat([buffer, chunk]);
while (true) { while (true) {
const start = buffer.indexOf(0xffd8); const start = buffer.indexOf(JPEG_START);
if (start === -1) { if (start === -1) {
if (buffer.length > 2 * 1024 * 1024) { if (buffer.length > 2 * 1024 * 1024) {
buffer = buffer.slice(-1024 * 1024); buffer = buffer.slice(-1024 * 1024);
} }
break; break;
} }
const end = buffer.indexOf(0xffd9, start + 2); if (start > 0) {
buffer = buffer.slice(start);
}
const end = buffer.indexOf(JPEG_END, 2);
if (end === -1) break; if (end === -1) break;
const frame = buffer.slice(start, end + 2); const frame = buffer.slice(start, end + 2);
buffer = buffer.slice(end + 2); buffer = buffer.slice(end + 2);