Slight refactor
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29d1acddc1
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bad666456c
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@ -114,3 +114,5 @@ dmypy.json
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# Pyre type checker
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.pyre/
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.DS_Store
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.vscode/
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238
trashtalker.py
238
trashtalker.py
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@ -25,41 +25,45 @@ from random import shuffle
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##
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## If you can get this working using PJSUA2, a pull request would be greatly appreciated.
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# This feels real hacky but I'm not sure there's a better way of creating a generic object that
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# you can add properties to.
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class State(object):
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pass
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state=State()
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# Configuration
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LOG_LEVEL=0
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state.LOG_LEVEL=int(getenv('TT_LOG_LEVEL', 0))
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#TT_MEDIA_SOURCE and TT_LISTEN_PORT can be configured via env. variables
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sourcepath=getenv('TT_MEDIA_SOURCE', '/opt/media/')
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sipport=int(getenv('TT_LISTEN_PORT', 5062))
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state.source=getenv('TT_MEDIA_SOURCE', '/opt/media/')
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state.port=int(getenv('TT_LISTEN_PORT', 5062))
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# End configuration
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# Application scaffolding
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# logger functions
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def pjlog(level, str, len):
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olog(level+1, "pjsip", str)
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#print() is used over bare print because pylint yells at me if I use bare print
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def elog(sev, source, line):
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print("%s %s: %s" % ("!"*sev, source, line))
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def PJLog(level, line, length):
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Log(level+1, "pjsip", line)
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def Log(level, source, line, error=False):
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pfx='*'
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if error:
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pfx='!'
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print("%s %s: %s" % (pfx*level, source, line))
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sys.stdout.flush()
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def olog(sev, source, line):
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print("%s %s: %s" % ("*"*sev, source, line))
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sys.stdout.flush()
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#SIGTERM handler; could be expanded to handle SIGKILL, SIGHUP, SIGUSR1, etc.
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#TODO: handle SIGHUP or SIGUSR1 for live-relaoding playlist
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#Generic signal handler
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def sighandle(_signo, _stack_frame):
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global mainloop
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olog(1, "sighandler", "caught signal %s" % _signo)
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global state
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Log(1, "sighandler", "caught signal %s" % _signo)
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if _signo == 1:
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#SIGHUP
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olog(1, "sighandler", "SIGHUP handled, reloading playlist")
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loadplaylist()
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Log(1, "sighandler", "SIGHUP invoked playlist reload")
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MediaLoadPlaylist()
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elif _signo == 2:
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#SIGINT
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olog(1, "sighandler", "SIGINT handled, hanging up all calls")
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pj.Lib.instance().hangup_all()
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Log(1, "sighandler", "SIGINT invoked current call flush")
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state.lib.hangup_all()
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elif _signo == 15:
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#SIGTERM
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olog(1, "sighandler", "SIGTERM handled, closing main loop")
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mainloop=False
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Log(1, "sighandler", "SIGTERM invoked app shutdown")
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state.running=False
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pass
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# Classes
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@ -72,9 +76,10 @@ class AccountCb(pj.AccountCallback):
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pj.AccountCallback.__init__(self, account)
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def on_incoming_call(self, call):
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olog(2, "event-call-in", "caller %s dialled in" % call.info().remote_uri)
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Log(2, "event-call-in", "caller %s dialled in" % call.info().remote_uri)
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call.set_callback(CallCb(call))
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#brief delay between ringing and connected means we can do playlist setup without a period of silence
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#Answer call with SIP/2.0 180 RINGING
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#This kicks in the EARLY media state, allowing us to initialise the playlist before the call connects
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call.answer(SIPStates.ringing)
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# Call Callback class
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class CallCb(pj.CallCallback):
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@ -82,151 +87,132 @@ class CallCb(pj.CallCallback):
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pj.CallCallback.__init__(self, call)
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def on_state(self):
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olog(3, "event-state-change", "SIP/2.0 %s (%s), call %s in call with party %s" %
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global state
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Log(2, "event-state-change", "SIP/2.0 %s (%s), call %s in call with party %s" %
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(self.call.info().last_code, self.call.info().last_reason,
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self.call.info().state_text, self.call.info().remote_uri))
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#call states not handled so far: CONNECTING
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#EARLY media state allows us to init the playlist while the call establishes
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if self.call.info().state == pj.CallState.EARLY:
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global files
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self.playlist=files
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self.playlist=state.playlist
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shuffle(self.playlist)
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self.playlist_instance=pj.Lib.instance().create_playlist(
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self.instmedia=state.lib.create_playlist(
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loop=True, filelist=self.playlist, label="trashtalklist")
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self.playlistslot=pj.Lib.instance().playlist_get_slot(self.playlist_instance)
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olog(4, "event-call-state-early", "initialised new trashtalk playlist instance")
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self.slotmedia=state.lib.playlist_get_slot(self.instmedia)
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Log(3, "event-call-state-early", "initialised new trashtalk playlist instance")
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#answer the call once playlist is prepared
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self.call.answer(SIPStates.answer)
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#CONFIRMED state indicates the call is connected
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elif self.call.info().state == pj.CallState.CONFIRMED:
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olog(3, "event-call-state-confirmed", "answered call")
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self.confslot=self.call.info().conf_slot
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pj.Lib.instance().conf_connect(self.playlistslot, self.confslot)
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olog(3, "event-call-conf-joined", "joined trashtalk to call")
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Log(3, "event-call-state-confirmed", "answered call")
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self.slotcall=self.call.info().conf_slot
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state.lib.conf_connect(self.slotmedia, self.slotcall)
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Log(3, "event-call-conf-joined", "joined trashtalk to call")
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#DISCONNECTED state indicates the call has ended (whether on our end or the caller's)
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elif self.call.info().state == pj.CallState.DISCONNECTED:
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olog(3, "event-call-state-disconnected", "call disconnected")
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pj.Lib.instance().conf_disconnect(self.playlistslot, self.confslot)
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pj.Lib.instance().playlist_destroy(self.playlist_instance)
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olog(3, "event-call-conf-left", "removed trashtalk instance from call and destroyed it")
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Log(3, "event-call-state-disconnected", "call disconnected")
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state.lib.conf_disconnect(self.slotmedia, self.slotcall)
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state.lib.playlist_destroy(self.instmedia)
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Log(3, "event-call-conf-left", "removed trashtalk instance from call and destroyed it")
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#I'm not sure what this is for, as all media handling is actually done within the SIP events above
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def on_media_state(self):
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if self.call.info().media_state == pj.MediaState.ACTIVE:
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olog(4, "event-media-state-change", "Media State transitioned to ACTIVE")
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Log(4, "event-media-state-change", "Media State transitioned to ACTIVE")
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else:
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olog(4, "event-media-state-change", "Media State transitioned to INACTIVE")
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Log(4, "event-media-state-change", "Media State transitioned to INACTIVE")
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# Main logic functions
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def PjInit():
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global lib
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global LOG_LEVEL
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lib=pj.Lib()
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cfg_ua=pj.UAConfig()
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#TODO: make max_calls configurable?
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cfg_ua.max_calls=32
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cfg_ua.user_agent="TrashTalker/1.0"
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cfg_media=pj.MediaConfig()
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cfg_media.no_vad=True
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cfg_media.enable_ice=False
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lib.init(ua_cfg=cfg_ua, media_cfg=cfg_media,
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log_cfg=pj.LogConfig(level=LOG_LEVEL, callback=pjlog))
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lib.set_null_snd_dev()
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lib.start(with_thread=True)
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def PJInit():
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global state
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state.lib=pj.Lib()
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state.cfg_ua=pj.UAConfig()
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state.cfg_md=pj.MediaConfig()
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state.cfg_ua.max_calls, state.cfg_ua.user_agent = 32, "TrashTalker/1.0"
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state.cfg_md.no_vad, state.cfg_md.enable_ice = True, False
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state.lib.init(
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ua_cfg=state.cfg_ua,
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media_cfg=state.cfg_md,
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log_cfg=pj.LogConfig(
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level=state.LOG_LEVEL,
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callback=PJLog
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)
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)
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state.lib.set_null_snd_dev()
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state.lib.start(with_thread=True)
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state.transport=state.lib.create_transport(
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pj.TransportType.UDP,
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pj.TransportConfig(state.port)
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)
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state.account=state.lib.create_account_for_transport(
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state.transport,
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cb=AccountCb()
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)
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state.uri="sip:%s:%s" % (state.transport.info().host, state.transport.info().port)
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def PjMediaInit():
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global transport
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global acct
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global sipuri
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global sipport
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global lib
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transport=lib.create_transport(pj.TransportType.UDP,
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pj.TransportConfig(sipport))
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acct=lib.create_account_for_transport(transport, cb=AccountCb())
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sipuri="sip:%s:%s" % (transport.info().host, transport.info().port)
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def TrashTalkerInit():
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global mainloop
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while mainloop:
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def WaitLoop():
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global state
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while state.running:
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sleep(0.2)
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def PjDeinit():
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global transport
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global acct
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global sipport
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global lib
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lib.hangup_all()
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global state
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state.lib.hangup_all()
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# allow time for cleanup before destroying objects
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lib.handle_events(timeout=250)
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state.lib.handle_events(timeout=250)
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try:
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acct.delete()
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lib.destroy()
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lib=None
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acct=None
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transport=None
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state.account.delete()
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state.lib.destroy()
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state.lib=state.account=state.transport=None
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except AttributeError:
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elog(1, "deinit", "AttributeError when clearing down pjsip, this is likely fine")
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Log(1, "deinit", "AttributeError when clearing down pjsip, this is likely fine", error=True)
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pass
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except pj.Error as e:
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elog(1, "deinit", "pjsip error when clearing down: %s" % str(e))
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Log(1, "deinit", "pjsip error when clearing down: %s" % str(e), error=True)
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pass
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def loadplaylist():
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olog(2, "playlist-load", "loading playlist files")
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global sourcepath
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if not sourcepath.endswith('/'):
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olog(1, "playlist-load", "appending trailing / to TT_MEDIA_SOURCE")
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sourcepath="%s/" % sourcepath
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global files
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files=listdir(sourcepath)
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files[:]=[sourcepath+file for file in files]
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assert (len(files) > 1), "playlist path %s must contain more than one audio file" % sourcepath
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olog(1, "playlist-load",
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"load playlist from %s, got %s files" % (sourcepath, len(files)))
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def MediaLoadPlaylist():
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Log(3, "playlist-load", "loading playlist files")
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global state
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if not state.source.endswith('/'):
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Log(4, "playlist-load", "appending trailing / to TT_MEDIA_SOURCE")
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state.source="%s/" % state.source
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state.playlist=listdir(state.source)
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state.playlist[:]=[state.source+file for file in state.playlist]
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assert (len(state.playlist) > 1), "playlist path %s must contain more than one audio file" % state.source
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Log(3, "playlist-load",
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"load playlist from %s, got %s files" % (state.source, len(state.playlist)))
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def main():
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olog(1, "init", "initialising trashtalker")
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global mainloop
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global files
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global sipuri
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global sourcepath
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mainloop=True
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Log(1, "init", "initialising trashtalker")
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global state
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state.running=True
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signal(SIGHUP, sighandle)
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signal(SIGINT, sighandle)
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signal(SIGTERM, sighandle)
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assert sourcepath.startswith('/'), "Environment variable TT_MEDIA_PATH must be an absolute path!"
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assert state.source.startswith('/'), "Environment variable TT_MEDIA_PATH must be an absolute path!"
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try:
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loadplaylist()
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MediaLoadPlaylist()
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except:
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elog(1, "playlist-load", "exception encountered while loading playlist from path %s" % sourcepath)
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Log(2, "playlist-load", "exception encountered while loading playlist from path %s" % state.source, error=True)
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raise Exception("Unable to load playlist")
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try:
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PjInit()
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PJInit()
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except:
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elog(1, "pj-init", "Unable to initialise pjsip library")
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raise Exception("Unable to initialise pjsip library")
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Log(2, "pj-init", "Unable to initialise pjsip library; please check media path and SIP listening port are correct", error=True)
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raise Exception("Unable to initialise pjsip library; please check media path and SIP listening port are correct")
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Log(1, "init-complete", "trashtalker listening on uri %s and serving %s media items from %s" % (state.uri, len(state.playlist), state.source))
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try:
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PjMediaInit()
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except:
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elog(1, "pj-media-init", "Unable to initialise pjsip media or transport")
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raise Exception("Unable to initialise pjsip media or transport")
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olog(1, "init-complete", "trashtalker listening on uri %s and serving media from %s" % (sipuri, sourcepath))
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try:
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TrashTalkerInit()
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WaitLoop()
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except pj.Error as e:
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elog(1, "pjsip-error", "trashtalker encountered pjsip exception %s" % str(e))
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mainloop=False
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Log(2, "pjsip-error", "trashtalker encountered pjsip exception %s" % str(e), error=True)
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state.running=False
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pass
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except KeyboardInterrupt:
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mainloop=False
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state.running=False
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pass
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olog(1, "deinit", "main loop exited, shutting down")
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Log(1, "deinit", "main loop exited, shutting down")
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PjDeinit()
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olog(1, "deinit-complete", "trashtalker has shut down")
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lib=None
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acct=None
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transport=None
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sipuri=None
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mainloop=False
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files=()
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Log(1, "deinit-complete", "trashtalker has shut down")
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if __name__ == "__main__":
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main()
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