def _get_streams(self):
        """
            Find all the streams for the ITV url
            :return: Mapping of quality to stream
        """
        soap_message = self._soap_request()

        headers = {'Content-Length': '{0:d}'.format(len(soap_message)),
                   'Content-Type': 'text/xml; charset=utf-8',
                   'Host': 'mercury.itv.com',
                   'Origin': 'http://www.itv.com',
                   'Referer': 'http://www.itv.com/Mercury/Mercury_VideoPlayer.swf?v=null',
                   'SOAPAction': "http://tempuri.org/PlaylistService/GetPlaylist",
                   'User-Agent': ITV_PLAYER_USER_AGENT,
                   "X-Requested-With": "ShockwaveFlash/16.0.0.305"}

        res = http.post("http://mercury.itv.com/PlaylistService.svc?wsdl",
                        headers=headers,
                        data=soap_message)

        # looking for the <MediaFiles> tag
        xmldoc = http.xml(res)

        mediafiles = xmldoc.find(".//VideoEntries//MediaFiles")
        # No mediafiles, no streams
        if not mediafiles:
            return None

        rtmp = mediafiles.attrib['base']
        streams = {}

        for mediafile in mediafiles.findall("MediaFile"):
            playpath = mediafile.find("URL").text

            rtmp_url = urlparse(rtmp)
            app = (rtmp_url.path[1:] + '?' + rtmp_url.query).rstrip('?')
            live = app == "live"

            params = dict(rtmp="{u.scheme}://{u.netloc}{u.path}".format(u=rtmp_url),
                          app=app.rstrip('?'),
                          playpath=playpath,
                          swfVfy=LIVE_SWF_URL if live else ONDEMAND_SWF_URL,
                          timeout=10)
            if live:
                params['live'] = True

            bitrate = int(mediafile.attrib['bitrate']) / 1000
            quality = "{0}k".format(bitrate)
            streams[quality] = RTMPStream(self.session, params)

        return streams

            Find all the streams for the ITV url
            :return: Mapping of quality to stream
        
src/livestreamer/plugins/itvplayer.py