I'm trying to use pjsip via pjsua2 in python. I have a problem with threading.
import pjsua2 as pj
import threading
# pjsua2 test function
def pjsua2_test():
# Create and initialize the library
ep = pj.Endpoint()
ep.libCreate()
if __name__ == "__main__":
pjsuadaemonthread = threading.Thread(name='PJSUA',
target=pjsua2_test)
pjsuadaemonthread.start()
ep = pj.Endpoint()
ep.libHandleEvents(10)
I get this error:
python3: ../src/pj/os_core_unix.c:692: pj_thread_this: Assertion `!"Calling pjlib from unknown/external thread. You must " "register external threads with pj_thread_register() " "before calling any pjlib functions."' failed.
How do I call pj_thread_register(), from python?
This is the syntax to pj_thread_register():
ep.libRegisterThread('PJSUA')
Unfortunately even if you call libRegisterThread it does not seem compatible with python threading.
I think this is because pjsip internally uses threads of type pj_thread_t and python threads are not of type pj_thread_t.
For more info take a look at Endpoint::libRegisterThread in the pjsip source code.
However, if you just want to run pjsip on a different thread, the code below may help. It runs pjsip on a background thread named 'PJSUA-THREAD'. The key is to call libCreate() on a different thread like I do below.
'''Tests running PJSUA2 in a different thread'''
import logging
import threading
import pjsua2
date_fmt = '%Y-%m-%d,%H:%M:%S'
log_format = "%(levelname)s %(asctime)s.%(msecs)03d %(threadName)s %(name)s.%(funcName)s %(message)s"
logging.basicConfig(format=log_format, datefmt=date_fmt, level=logging.DEBUG)
_logger = logging.getLogger(__name__)
THREAD_NAME = "PJSUA-THREAD"
def main():
_logger.debug("entered main()")
pjsuadaemonthread = threading.Thread(name=THREAD_NAME, target=pjsua2_test)
pjsuadaemonthread.start()
_logger.debug("thread started")
pjsuadaemonthread.join()
# pjsua2 test function
def pjsua2_test():
# NOTE: PjSip will initialize and run on PJSUA-THREAD, see logs
ep = pjsua2.Endpoint()
ep.libCreate()
_logger.debug("after libCreate()")
ep_cfg = pjsua2.EpConfig()
ep_cfg.uaConfig.mainThreadOnly = False
ep_cfg.uaConfig.threadCnt = 1
ep.libInit(ep_cfg)
_logger.debug("after libInit(ep_cfg)")
ep.libStart()
_logger.debug("after libStart()")
iter_count = 0
event_count = 0
while iter_count < 10:
event_count += ep.libHandleEvents(10)
_logger.debug("iter_count %d (%d events processed)", iter_count, event_count)
iter_count += 1
ep.libDestroy()
_logger.debug("after ep.libDestroy()")
if __name__ == "__main__":
main()
_logger.debug("after main()")
Here is the log output. You can see pjsip is running on thread PJSUA-THREAD.
DEBUG 2020-05-31,14:49:43.259 MainThread __main__.main entered main()
14:49:43.261 os_core_unix.c !pjlib 2.8 for POSIX initialized
14:49:43.261 sip_endpoint.c .Creating endpoint instance...
14:49:43.262 pjlib .select() I/O Queue created (0x7fd530013550)
14:49:43.262 sip_endpoint.c .Module "mod-msg-print" registered
14:49:43.262 sip_transport.c .Transport manager created.
14:49:43.262 pjsua_core.c .PJSUA state changed: NULL --> CREATED
DEBUG 2020-05-31,14:49:43.262 PJSUA-THREAD __main__.pjsua2_test after libCreate()
14:49:43.262 sip_endpoint.c .Module "mod-pjsua-log" registered
14:49:43.263 sip_endpoint.c .Module "mod-tsx-layer" registered
14:49:43.263 sip_endpoint.c .Module "mod-stateful-util" registered
14:49:43.263 sip_endpoint.c .Module "mod-ua" registered
14:49:43.263 sip_endpoint.c .Module "mod-100rel" registered
14:49:43.263 sip_endpoint.c .Module "mod-pjsua" registered
14:49:43.263 sip_endpoint.c .Module "mod-invite" registered
14:49:43.496 alsa_dev.c ..ALSA driver found 32 devices
14:49:43.496 alsa_dev.c ..ALSA initialized
14:49:43.496 pjlib ..select() I/O Queue created (0x7fd53009cf08)
14:49:43.499 sip_endpoint.c .Module "mod-evsub" registered
14:49:43.499 sip_endpoint.c .Module "mod-presence" registered
14:49:43.499 sip_endpoint.c .Module "mod-mwi" registered
14:49:43.499 sip_endpoint.c .Module "mod-refer" registered
14:49:43.499 sip_endpoint.c .Module "mod-pjsua-pres" registered
14:49:43.499 sip_endpoint.c .Module "mod-pjsua-im" registered
14:49:43.499 sip_endpoint.c .Module "mod-pjsua-options" registered
14:49:43.499 pjsua_core.c .1 SIP worker threads created
14:49:43.499 pjsua_core.c .pjsua version 2.8 for Linux-5.3.0.53/x86_64/glibc-2.27 initialized
14:49:43.499 pjsua_core.c .PJSUA state changed: CREATED --> INIT
DEBUG 2020-05-31,14:49:43.262 MainThread __main__.main thread started
DEBUG 2020-05-31,14:49:43.499 PJSUA-THREAD __main__.pjsua2_test after libInit(ep_cfg)
14:49:43.499 pjsua_core.c PJSUA state changed: INIT --> STARTING
DEBUG 2020-05-31,14:49:43.500 PJSUA-THREAD __main__.pjsua2_test after libStart()
14:49:43.500 sip_endpoint.c .Module "mod-unsolicited-mwi" registered
14:49:43.500 pjsua_core.c .PJSUA state changed: STARTING --> RUNNING
DEBUG 2020-05-31,14:49:43.510 PJSUA-THREAD __main__.pjsua2_test iter_count 0 (0 events processed)
DEBUG 2020-05-31,14:49:43.520 PJSUA-THREAD __main__.pjsua2_test iter_count 1 (0 events processed)
DEBUG 2020-05-31,14:49:43.531 PJSUA-THREAD __main__.pjsua2_test iter_count 2 (0 events processed)
DEBUG 2020-05-31,14:49:43.541 PJSUA-THREAD __main__.pjsua2_test iter_count 3 (0 events processed)
DEBUG 2020-05-31,14:49:43.551 PJSUA-THREAD __main__.pjsua2_test iter_count 4 (0 events processed)
DEBUG 2020-05-31,14:49:43.562 PJSUA-THREAD __main__.pjsua2_test iter_count 5 (0 events processed)
DEBUG 2020-05-31,14:49:43.572 PJSUA-THREAD __main__.pjsua2_test iter_count 6 (0 events processed)
DEBUG 2020-05-31,14:49:43.582 PJSUA-THREAD __main__.pjsua2_test iter_count 7 (0 events processed)
DEBUG 2020-05-31,14:49:43.593 PJSUA-THREAD __main__.pjsua2_test iter_count 8 (0 events processed)
DEBUG 2020-05-31,14:49:43.603 PJSUA-THREAD __main__.pjsua2_test iter_count 9 (0 events processed)
14:49:43.604 pjsua_core.c Shutting down, flags=0...
14:49:43.604 pjsua_core.c PJSUA state changed: RUNNING --> CLOSING
14:49:43.610 pjsua_call.c .Hangup all calls..
14:49:43.610 pjsua_media.c .Call 0: deinitializing media..
14:49:43.610 pjsua_media.c .Call 1: deinitializing media..
14:49:43.610 pjsua_media.c .Call 2: deinitializing media..
14:49:43.610 pjsua_media.c .Call 3: deinitializing media..
14:49:43.610 pjsua_pres.c .Shutting down presence..
14:49:44.610 pjsua_core.c .Destroying...
14:49:44.610 pjsua_media.c .Shutting down media..
14:49:44.997 sip_transaction.c .Stopping transaction layer module
14:49:44.997 sip_transaction.c .Stopped transaction layer module
14:49:44.997 sip_endpoint.c .Module "mod-unsolicited-mwi" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-pjsua-options" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-pjsua-im" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-pjsua-pres" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-pjsua" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-stateful-util" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-refer" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-mwi" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-presence" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-evsub" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-invite" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-100rel" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-ua" unregistered
14:49:44.997 sip_transaction.c .Transaction layer module destroyed
14:49:44.997 sip_endpoint.c .Module "mod-tsx-layer" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-msg-print" unregistered
14:49:44.997 sip_endpoint.c .Module "mod-pjsua-log" unregistered
14:49:44.997 sip_endpoint.c .Endpoint 0x7fd5300087b8 destroyed
14:49:44.997 pjsua_core.c .PJSUA state changed: CLOSING --> NULL
14:49:44.997 pjsua_core.c .PJSUA destroyed...
DEBUG 2020-05-31,14:49:44.997 PJSUA-THREAD __main__.pjsua2_test after ep.libDestroy()
DEBUG 2020-05-31,14:49:45.000 MainThread __main__.<module> after main()