Method decodeRect

systemvm/agent/noVNC/core/decoders/h264.js:287–320

(x, y, width, height, sock, display, depth)

    }

    decodeRect(x, y, width, height, sock, display, depth) {
        const resetContextFlag = 1;
        const resetAllContextsFlag = 2;

        if (sock.rQwait("h264 header", 8)) {
            return false;
        }

        const length = sock.rQshift32();
        const flags = sock.rQshift32();

        if (sock.rQwait("h264 payload", length, 8)) {
            return false;
        }

        if (flags & resetAllContextsFlag) {
            this._resetAllContexts();
        } else if (flags & resetContextFlag) {
            this._resetContext(x, y, width, height);
        }

        let context = this._getContext(x, y, width, height);
        context.lastUsed = this._tick++;

        if (length !== 0) {
            let payload = sock.rQshiftBytes(length, false);
            let frame = context.decode(payload);
            if (frame !== null) {
                display.videoFrame(x, y, width, height, frame);
            }
        }

        return true;
    }
}