Craig Rowe
61 linhas
1.6 KiB
JavaScript
61 linhas
1.6 KiB
JavaScript
var Stream = require('stream').Stream;
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var util = require('util');
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var net = require('net');
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var constants = require('../constants');
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module.exports = TcpVideoStream;
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util.inherits(TcpVideoStream, Stream);
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function TcpVideoStream(options) {
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Stream.call(this);
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options = options || {};
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this.readable = true;
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this._socket = options.socket || new net.Socket;
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this._port = options.port || constants.ports.VIDEO;
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this._ip = options.ip || constants.DEFAULT_DRONE_IP;
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this._timeout = options.timeout || 1 * 1000;
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this._expectFIN = false;
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}
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TcpVideoStream.prototype.connect = function(cb) {
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cb = cb || function() {};
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this._socket.removeAllListeners(); // To avoid duplicates when re-connecting
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this._socket.connect(this._port, this._ip);
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this._socket.setTimeout(this._timeout);
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var self = this;
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this._socket
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.on('connect', function() {
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cb(null);
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})
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.on('data', function(buffer) {
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self.emit('data', buffer);
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})
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.on('timeout', function() {
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var err = new Error('TcpVideoStream timeout after ' + self._timeout + ' ms.');
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self.emit('error', err);
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self.emit('close', err);
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self._socket.destroy();
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})
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.on('error', function(err) {
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cb(err);
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})
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.on('end', function() {
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if (self._expectFIN) {
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self.emit('close');
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return;
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}
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var err = new Error('TcpVideoStream received FIN unexpectedly.');
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self.emit('error', err);
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self.emit('close', err);
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});
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};
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TcpVideoStream.prototype.end = function() {
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this._expectFIN = true;
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this._socket.end();
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};
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