fetapi/phoneinterface.py

import linphone
import time
import threading
import subprocess

class PhoneProxyConfiguration(object):
    def __init__(self, name, proxy, identity, username, password, realm,
                 prefix):
        self.name = name
        self.proxy = proxy
        self.identity = identity
        self.username = username
        self.password = password
        self.realm = realm
        self.prefix = prefix

class PhoneConfiguration(object):
    def __init__(self, sound_device, incoming_timeout, linphone_config,
                 default_proxy, proxies, stun_server):
        self.sound_device = sound_device
        self.incoming_timeout = incoming_timeout
        self.linphone_config = linphone_config
        self.default_proxy = default_proxy
        self.proxies = proxies
        self.stun_server = stun_server

class PhoneEvent(object):
    RegInProgress,\
    RegSuccessfull,\
    RegLost,\
    CallIncoming,\
    CallRinging,\
    CallAccepted,\
    CallEnded,\
    CallBusy,\
    CallInvalidNumber = range(9)

    @classmethod
    def string(cls, val):
        for k, v in vars(cls).iteritems():
            if v == val:
                return k

class PhoneInterface(object):
    def __init__(self, config):
        cbs = {
            'global_state_changed': self.__global_state_changed,
            'registration_state_changed': self.__registration_state_changed,
            'call_state_changed': self.__call_state_changed
        }

        self.__event_cbs = []

        self.__config = config
        self.__core = linphone.Core.new(cbs, None, config.linphone_config)

        # Create and add all proxy configs
        for p in config.proxies:
            ainfo = self.__core.create_auth_info(p.username, p.username, p.password, None, p.realm, None)
            self.__core.add_auth_info(ainfo)

            pconf = self.__core.create_proxy_config()
            pconf.edit()
            pconf.identity = p.identity
            pconf.publish_enabled = False
            pconf.realm = p.realm
            pconf.register_enabled = True
            pconf.server_addr = p.proxy
            self.__core.add_proxy_config(pconf)
            pconf.done()

            if p.name == config.default_proxy:
                self.__core.default_proxy_config = pconf

        self.__audioproc = None
        aplay = subprocess.Popen(['aplay', '-qD%s' % config.sound_device], stdin=subprocess.PIPE)
        self.__ttsproc = subprocess.Popen(['espeak', '-p10', '--stdout'], stdin=subprocess.PIPE, stdout=aplay.stdin)

        # Set default parameters overriding the ones from the given config file
        self.__core.set_user_agent('FeTAp 615', '0.1')
        self.__core.stun_server = config.stun_server
        self.__core.ringback = ''
        self.__core.max_calls = 1
        self.__core.inc_timeout = config.incoming_timeout
        self.__core.set_call_error_tone(linphone.Reason.Busy, '')
        self.__core.disable_chat(linphone.Reason.None)
        self.__core.echo_cancellation_enabled = False
        self.__core.video_capture_enabled = False
        self.__core.video_display_enabled = False

    def __global_state_changed(self, core, state, msg):
        print 'Global state changed:', state, msg
        # TODO: Do we need events emitted here?
        pass

    def __registration_state_changed(self, core, proxyconf, state, msg):
        print 'Registration state changed:', proxyconf, state, msg
        evt = None
        if state == linphone.RegistrationState.Progress:
            evt = PhoneEvent.RegInProgress
        elif state == linphone.RegistrationState.Ok:
            evt = PhoneEvent.RegSuccessfull
        elif state == linphone.RegistrationState.None:
            evt = PhoneEvent.RegLost

        if evt is not None:
            for cb in self.__event_cbs:
                cb(evt)
        else:
            print 'Unhandled registration state:', linphone.RegistrationState.string(state)

    def __call_state_changed(self, core, call, state, msg):
        print 'Call state changed:', call, state, msg
        evt = None
        if state == linphone.CallState.IncomingReceived:
            evt = PhoneEvent.CallIncoming
        elif state == linphone.CallState.OutgoingRinging:
            evt = PhoneEvent.CallRinging
        elif state == linphone.CallState.Connected:
            evt = PhoneEvent.CallAccepted
        elif state == linphone.CallState.End:
            evt = PhoneEvent.CallEnded
        elif state == linphone.CallState.Error:
            error = call.error_info.reason
            if error == linphone.Reason.Busy:
                evt = PhoneEvent.CallBusy
            elif error == linphone.Reason.NotFound:
                evt = PhoneEvent.CallInvalidNumber
            else:
                evt = PhoneEvent.CallEnded

        if evt is not None:
            for cb in self.__event_cbs:
                cb(evt)
        else:
            print 'Unhandled call state:', linphone.CallState.string(state)

    def __pollthread(self):
        while self.__running:
            self.__core.iterate()
            time.sleep(0.02) # Value from example code

    def start(self):
        self.__running = True
        t = threading.Thread(target=self.__pollthread)
        t.start()

    def stop(self):
        self.stop_playing()
        if self.__ttsproc is not None:
            self.__ttsproc.terminate()
        self.__running = False

    def add_event_cb(self, cb):
        self.__event_cbs.append(cb)

    def call(self, number):
        if '@' not in number and self.__core.default_proxy_config is None:
            # Try to resolve prefix
            for p in self.__config.proxies:
                if number.startswith(p.prefix):
                    number = number[len(p.prefix):]
                    number += '@' + p.realm
                    break
        self.__core.invite(number)

    def accept_call(self):
        self.__core.accept_call(self.__core.current_call)

    def decline_call(self):
        self.__core.decline_call(self.__core.current_call, linphone.Reason.Busy)

    def end_call(self):
        self.__core.terminate_call(self.__core.current_call)

    def play_dial_tone(self):
        self.stop_playing()
        self.__audioproc = subprocess.Popen(['play', '-nq', 'synth', 'sine', '425'],
                                            env = {'AUDIODRIVER': 'alsa',
                                                   'AUDIODEV': self.__config.sound_device})

    def play_ringback_tone(self):
        self.stop_playing()
        self.__audioproc = subprocess.Popen(['play', '-nq', 'synth', '1', 'sine', '425', 'pad', '4@1', 'repeat', '1000'],
                                            env = {'AUDIODRIVER': 'alsa',
                                                   'AUDIODEV': self.__config.sound_device})

    def play_busy_tone(self):
        self.stop_playing()
        self.__audioproc = subprocess.Popen(['play', '-nq', 'synth', '0.48', 'sine', '425', 'pad', '0.48@0.48', 'repeat', '1000'],
                                            env = {'AUDIODRIVER': 'alsa',
                                                   'AUDIODEV': self.__config.sound_device})

    def stop_playing(self):
        if self.__audioproc is not None:
            self.__audioproc.terminate()

    def read_text(self, text):
        self.__ttsproc.stdin.write(text + '\n')
        self.__ttsproc.stdin.flush()

if __name__ == '__main__':
    def event_cb(evt):
        print 'Got event:', PhoneEvent.string(evt)

    try:
        phone = PhoneInterface('.linphonerc-foo', '.linphonerc')
        phone.add_event_cb(event_cb)
        phone.start()
        i = 0
        while True:
            time.sleep(1)
            i += 1
            if i == 5:
                phone.call('3474')
                #phone.play_busy_tone()
                pass
    except KeyboardInterrupt:
        phone.stop()