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# telepathy-butterfly - an MSN connection manager for Telepathy
#
# Copyright (C) 2009 Collabora Ltd.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from constants import *
import base64
import logging
import dbus
import telepathy
import papyon
import papyon.event
from papyon.media import *
__all__ = ['ButterflyStreamHandler']
logger = logging.getLogger('Butterfly.StreamHandler')
class ButterflyStreamHandler (
telepathy.server.DBusProperties,
telepathy.server.MediaStreamHandler,
papyon.event.MediaStreamEventInterface):
def __init__(self, connection, session, stream):
self._id = session.next_stream_id
path = session.get_stream_path(self._id)
self._conn = connection
self._session = session
self._stream = stream
self._interfaces = set()
self._callbacks = {}
self._ready = False
self._accepted = False
self._state = telepathy.MEDIA_STREAM_STATE_CONNECTING
self._direction = stream.direction
if self._stream.created_locally:
self._pending_send = telepathy.MEDIA_STREAM_PENDING_REMOTE_SEND
else:
self._pending_send = telepathy.MEDIA_STREAM_PENDING_LOCAL_SEND
self._type = StreamTypes[stream.name]
self._remote_candidates = None
self._remote_codecs = None
telepathy.server.DBusProperties.__init__(self)
telepathy.server.MediaStreamHandler.__init__(self, connection._name, path)
self._implement_property_get(telepathy.interfaces.MEDIA_STREAM_HANDLER,
{'CreatedLocally': lambda: self.created_locally,
'NATTraversal': lambda: self.nat_traversal,
'STUNServers': lambda: self.stun_servers,
'RelayInfo': lambda: self.relay_info})
if stream._remote_candidates:
self.on_remote_candidates_received(stream._remote_candidates)
if stream._remote_codecs:
self.on_remote_codecs_received(stream._remote_codecs)
papyon.event.MediaStreamEventInterface.__init__(self, stream)
@property
def id(self):
return self._id
@property
def type(self):
return self._type
@property
def direction(self):
return self._direction
@property
def pending_send(self):
return self._pending_send
@property
def state(self):
return self._state
@property
def stream(self):
return self._stream
@property
def created_locally(self):
return self._stream.created_locally
@property
def ready_for_candidates(self):
return self._ready and (self._stream.created_locally or self._accepted)
@property
def nat_traversal(self):
if self._session.type is MediaSessionType.SIP:
return "wlm-8.5"
elif self._session.type is MediaSessionType.TUNNELED_SIP:
return "wlm-2009"
else:
return "none"
@property
def relay_info(self):
relays = dbus.Array([], signature="a{sv}")
for i, relay in enumerate(self._stream.relays):
dict = self.convert_relay(relay)
dict["component"] = dbus.UInt32(i + 1)
relays.append(dict)
return relays
@property
def stun_servers(self):
servers = dbus.Array([], signature="(su)")
if self._session.type in (MediaSessionType.SIP, MediaSessionType.TUNNELED_SIP):
servers.append(((STUN_SERVER_IP, dbus.UInt32(STUN_SERVER_PORT))))
return servers
def set_direction(self, direction, pending_send):
self._direction = direction
self._pending_send = pending_send
def connect(self, signal, cb):
self._callbacks.setdefault(signal, []).append(cb)
def emit(self, signal, *args):
callbacks = self._callbacks.get(signal, [])
for cb in callbacks:
cb(self, *args)
def Ready(self, codecs):
logger.info("Stream %i is ready" % self._id)
self._ready = True
is_webcam = (self._session.type is MediaSessionType.WEBCAM_SEND or
self._session.type is MediaSessionType.WEBCAM_RECV)
if self._remote_codecs:
self.SetRemoteCodecs(self._remote_codecs)
if self._remote_candidates and self.ready_for_candidates:
self.SetRemoteCandidateList(self._remote_candidates)
self.SetStreamPlaying(self._direction &
telepathy.MEDIA_STREAM_DIRECTION_RECEIVE)
self.SetStreamSending(self._direction &
telepathy.MEDIA_STREAM_DIRECTION_SEND)
if self.created_locally or is_webcam:
self.SetLocalCodecs(codecs)
def send_candidates(self):
self._accepted = True
if self._remote_candidates and self.ready_for_candidates:
self.SetRemoteCandidateList(self._remote_candidates)
def StreamState(self, state):
logger.info("Stream %i state changed to %i" % (self._id, state))
self._state = state
self.emit("state-changed", state)
def Error(self, code, message):
logger.error("Stream %i received error %i: %s" % (self._id, code, message))
self.emit("error", code, message)
self.Close()
def NewNativeCandidate(self, id, transports):
logger.info("Stream %i received new native candidate %s" % (self._id, id))
candidates = []
for transport in transports:
candidates.append(self.convert_tp_candidate(id, transport))
for candidate in candidates:
self._stream.new_local_candidate(candidate)
def NativeCandidatesPrepared(self):
logger.info("Stream %i natice candidates are prepared" % self._id)
self._stream.local_candidates_prepared()
def NewActiveCandidatePair(self, native_id, remote_id):
logger.info("Stream %i new active candidate pair %s %s" % (self._id,
native_id, remote_id))
self._stream.new_active_candidate_pair(native_id, remote_id)
def SetLocalCodecs(self, codecs):
logger.info("Stream %i received local codecs" % self._id)
list = self.convert_tp_codecs(codecs)
self._stream.set_local_codecs(list)
def SupportedCodecs(self, codecs):
logger.info("Stream %i received supported codecs" % self._id)
list = self.convert_tp_codecs(codecs)
self._stream.set_local_codecs(list)
def CodecChoice(self, codec_id):
logger.info("Stream %i codec choice is %i" % (self._id, codec_id))
def CodecsUpdated(self, codecs):
logger.info("Stream %i received updated codecs" % self._id)
#papyon.event.MediaStreamEventInterface
def on_remote_candidates_received(self, candidates):
list = self.convert_media_candidates(candidates)
self._remote_candidates = list
if list and self.ready_for_candidates:
self.SetRemoteCandidateList(list)
#papyon.event.MediaStreamEventInterface
def on_remote_codecs_received(self, codecs):
list = self.convert_media_codecs(codecs)
self._remote_codecs = list
if self._stream.created_locally:
self.SetRemoteCodecs(list)
#papyon.event.MediaStreamEventInterface
def on_stream_closed(self):
logger.info("Stream %i closed" % self._id)
self._state = telepathy.MEDIA_STREAM_STATE_DISCONNECTED
self.emit("state-changed", self._state)
self.Close()
def convert_media_codecs(self, codecs):
list = []
for codec in codecs:
list.append(self.convert_media_codec(codec))
return list
# Conversion functions between papyon objects and telepathy structures
def convert_media_codec(self, codec):
return (codec.payload, codec.encoding, self._type, codec.clockrate, 0,
codec.params)
def convert_tp_codecs(self, codecs):
list = []
for codec in codecs:
payload, encoding, ctype, clockrate, channels, params = codec
c = MediaCodec(payload, encoding, clockrate, params)
list.append(c)
return list
def convert_media_candidates(self, candidates):
array = {}
for c in candidates:
if c.transport == "UDP":
proto = telepathy.MEDIA_STREAM_BASE_PROTO_UDP
else:
proto = telepathy.MEDIA_STREAM_BASE_PROTO_TCP
if c.type == "host":
type = telepathy.MEDIA_STREAM_TRANSPORT_TYPE_LOCAL
elif c.type == "srflx" or c.type == "prflx":
type = telepathy.MEDIA_STREAM_TRANSPORT_TYPE_DERIVED
elif c.type == "relay":
type = telepathy.MEDIA_STREAM_TRANSPORT_TYPE_RELAY
else:
type = telepathy.MEDIA_STREAM_TRANSPORT_TYPE_LOCAL
if c.priority is not None:
preference = float(c.priority) / PRIORITY_FACTOR
else:
preference = 1.0
transport = (c.component_id, c.ip, c.port, proto, self._session.subtype,
DEFAULT_PROFILE, preference, type, c.username, c.password)
array.setdefault(c.foundation, []).append(transport)
return array.items()
def convert_tp_candidate(self, id, transport):
(component_id, ip, port, proto, subtype, profile,
preference, ttype, username, password) = transport
component_id = int(component_id)
port = int(port)
priority = int(preference * PRIORITY_FACTOR)
if proto == telepathy.MEDIA_STREAM_BASE_PROTO_UDP:
proto = "UDP"
elif proto == telepathy.MEDIA_STREAM_BASE_PROTO_TCP:
proto = "TCP"
if ttype == telepathy.MEDIA_STREAM_TRANSPORT_TYPE_LOCAL:
ttype = "host"
base_addr = None
base_port = None
elif ttype == telepathy.MEDIA_STREAM_TRANSPORT_TYPE_DERIVED:
ttype = "srflx"
local_ip = self._conn.msn_client.local_ip
base_addr = local_ip
base_port = port
elif ttype == telepathy.MEDIA_STREAM_TRANSPORT_TYPE_RELAY:
ttype = "relay"
local_ip = self._conn.msn_client.local_ip
base_addr = local_ip
base_port = port
return MediaCandidate(id, component_id, proto, priority,
username, password, ttype, ip, port, base_addr, base_port)
def convert_relay(self, relay):
info = {"ip": relay.ip, "port": dbus.UInt32(relay.port),
"username": relay.username, "password": relay.password}
return dbus.Dictionary(info, signature="sv")
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