check-sync-on-feeds

#!/usr/bin/python
# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4

# (C) Copyright 2007 Zaheer Abbas Merali <zaheerabbas at merali dot org>
#
# 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 Library 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 flumotion.component import feed
from twisted.internet import reactor
from flumotion.twisted import pb
from flumotion.common import log, errors
from flumotion.admin import connections
from flumotion.admin.command import utils
from flumotion.admin.admin import AdminModel

import os
import sys
import string
import gobject
gobject.threads_init()
import gst
import optparse

haveVideoFeed = False
haveAudioFeed = False
videoFd = 0
audioFd = 0
videoBufferProbeId = 0
audioBufferProbeId = 0
haveVideoBuffer = False
haveAudioBuffer = False
lowestTimestamp = 0L
pipe = None
sentNewsegment = False
seenNewsegmentAudio = False
seenNewsegmentVideo = False

def usage(args, exitval=0):
    print "usage: %s [OPTIONS] -m MANAGER " \
        "-V FULLFEEDIDOFVIDEOFEEDER -A FULLFEEDIDOFAUDIOFEEDER" % args[0]
    print ''
    print 'See %s -h for help on the available options.' % args[0]
    sys.exit(exitval)

def gotVideoFeed(res):
    global haveAudioFeed
    global haveVideoFeed
    global videoFd

    if not res:
        log.debug("output-feed", "got None in gotFeed")
        reactor.stop()
        return
    (feedId, fd) = res
    videoFd = fd
    log.debug("check-sync-on-feeds","Got feed on fd %r for feedId %s" %
        (fd, feedId))
    haveVideoFeed = True
    if haveAudioFeed:
        startPipeline()

def videoEventProbe(pad, event):
    global seenNewsegmentVideo
    if event.type == gst.EVENT_NEWSEGMENT:
        log.debug("check-sync-on-feeds", "New segment event on video pad %r",
            event)
        if not seenNewsegmentVideo:
            seenNewsegmentVideo = True
            return False
    return True

def audioEventProbe(pad, event):
    global seenNewsegmentAudio
    if event.type == gst.EVENT_NEWSEGMENT:
        log.debug("check-sync-on-feeds", "New segment event on audio pad %r",
            event)
        if not seenNewsegmentAudio:
            seenNewsegmentAudio = True
            return False
    return True

def sendNewsegments():
    global pipe
    global lowestTimestamp
    global sentNewsegment
    global videoBufferProbeId
    global audioBufferProbeId

    if not sentNewsegment:
        sentNewsegment = True
        log.debug("check-sync-on-feeds",
            "new segment created with timestamp %d (%s)",
            lowestTimestamp, gst.TIME_ARGS(lowestTimestamp))
        newseg = gst.event_new_new_segment(False, 1.0, gst.FORMAT_TIME, lowestTimestamp, -1, 0)
        vsinkpad = pipe.get_by_name("vsinkpad").get_pad("sink")
        asinkpad = pipe.get_by_name("asinkpad").get_pad("sink")
        vsinkpad.send_event(newseg)
        asinkpad.send_event(newseg)
        vsinkpad.remove_buffer_probe(videoBufferProbeId)
        asinkpad.remove_buffer_probe(audioBufferProbeId)

def videoBufferProbe(pad, buffer):
    global haveVideoBuffer
    global haveAudioBuffer
    global lowestTimestamp
    haveVideoBuffer = True
    log.debug("check-sync-on-feeds",
        "video buffer arrived with timestamp %d (%s)",
        buffer.timestamp, gst.TIME_ARGS(buffer.timestamp))
    if haveAudioBuffer:
        if lowestTimestamp > buffer.timestamp:
            lowestTimestamp = buffer.timestamp
        sendNewsegments()
    else:
        lowestTimestamp = buffer.timestamp
    return False

def audioBufferProbe(pad, buffer):
    global haveVideoBuffer
    global haveAudioBuffer
    global lowestTimestamp
    haveAudioBuffer = True
    log.debug("check-sync-on-feeds",
        "audio buffer arrived with timestamp %d (%s)",
        buffer.timestamp, gst.TIME_ARGS(buffer.timestamp))
    if haveVideoBuffer:
        if lowestTimestamp > buffer.timestamp:
            lowestTimestamp = buffer.timestamp
        sendNewsegments()
    else:
        lowestTimestamp = buffer.timestamp
    return False

def startPipeline():
    global videoFd
    global audioFd
    global videoBufferProbeId
    global audioBufferProbeId
    global pipe
    log.debug("check-sync-on-feeds", "Starting pipeline")
    pipe = gst.parse_launch("fdsrc fd=%d ! queue ! gdpdepay ! ffmpegcolorspace name=vsinkpad ! videoscale ! ximagesink fdsrc fd=%d ! queue ! gdpdepay ! audioconvert name=asinkpad ! audioresample ! alsasink" % (videoFd,audioFd))
    vsinkpadElement = pipe.get_by_name("vsinkpad")
    asinkpadElement = pipe.get_by_name("asinkpad")
    # add event probes, when new segments received, block pad
    vsinkpad = vsinkpadElement.get_pad("sink")
    asinkpad = asinkpadElement.get_pad("sink")
    vsinkpad.add_event_probe(videoEventProbe)
    asinkpad.add_event_probe(audioEventProbe)
    videoBufferProbeId = vsinkpad.add_buffer_probe(videoBufferProbe)
    audioBufferProbeId = asinkpad.add_buffer_probe(audioBufferProbe)
    pipe.set_state(gst.STATE_PLAYING)

def gotAudioFeed(res):
    global haveAudioFeed
    global haveVideoFeed
    global audioFd
    if not res:
        log.debug("check-sync-on-feeds", "got None in gotFeed")
        reactor.stop()
        return
    (feedId, fd) = res
    audioFd = fd
    log.debug("check-sync-on-feeds","Got feed on fd %r for feedId %s" %
        (fd, feedId))
    haveAudioFeed = True
    if haveVideoFeed:
        startPipeline()

def main(args):
    log.init()

    parser = optparse.OptionParser()
    parser.add_option('-d', '--debug',
                      action="store", type="string", dest="debug",
                      help="set debug levels")
    parser.add_option('-u', '--usage',
                      action="store_true", dest="usage",
                      help="show a usage message")
    parser.add_option('-m', '--manager',
                      action="store", type="string", dest="manager",
                      help="the manager to connect to, e.g. localhost:7531")
    parser.add_option('', '--no-ssl',
                      action="store_true", dest="no_ssl",
                      help="disable encryption when connecting to the manager")
    parser.add_option('-V', '--video-feed-id',
                      action="store", type="string", dest="videoFeedId",
                      help="the full feed id of the video feed to connect to"
                        ", e.g. /default/video-source:default")
    parser.add_option('-A', '--audio-feed-id',
                      action="store", type="string", dest="audioFeedId",
                      help="the full feed id of the audio feed to connect to"
                        ", e.g. /default/audio-source:default")

    options, args = parser.parse_args(args)

    if options.debug:
        log.setFluDebug(options.debug)

    if options.usage:
        usage(args)

    if not options.manager or not options.videoFeedId or not \
        options.audioFeedId:
        usage(args)

    connection = connections.parsePBConnectionInfo(options.manager,
                                                   not options.no_ssl)
    model = AdminModel()
    d = model.connectToManager(connection)
    def failed(failure):
        if failure.check(errors.ConnectionRefusedError):
            print "Manager refused connection. Check your user and password."
        elif failure.check(errors.ConnectionFailedError):
            message = "".join(failure.value.args)
            print "Connection to manager failed: %s" % message
        else:
            print ("Exception while connecting to manager: %s"
                   % log.getFailureMessage(failure))
        return failure

    d.addErrback(failed)
    d.addCallback(managerConnected, options)
    reactor.run()

def getFeed(feedClient, worker, authenticator, feedId, model):
    fsd = model.workerCallRemote(worker.get("name"), "getFeedServerPort")
    def gotFeedServerPort(port):
        return feedClient.requestFeed(worker.get('host'), port,
            authenticator, feedId)
    fsd.addCallback(gotFeedServerPort)
    return fsd

def managerConnected(model, options):
    psd = model.callRemote('getPlanetState')

    def gotPlanetState(planet):
        videoAvatarId = utils.avatarId(options.videoFeedId.split(":")[0])
        audioAvatarId = utils.avatarId(options.audioFeedId.split(":")[0])
        videoComponent = utils.find_component(planet, videoAvatarId)
        audioComponent = utils.find_component(planet, audioAvatarId)
        if videoComponent and audioComponent:
            whsd = model.callRemote('getWorkerHeavenState')
            def gotWorkerHeavenState(whs):
                # find worker for each component
                vworkername = videoComponent.get("workerRequested")
                aworkername = audioComponent.get("workerRequested")
                vworker = None
                aworker = None
                for worker in whs.get('workers'):
                    if worker.get('name') == vworkername:
                        vworker = worker
                    if worker.get('name') == aworkername:
                        aworker = worker
                if vworker and aworker:
                    vclient = feed.FeedMedium(logName="check-sync-on-feeds")
                    aclient = feed.FeedMedium(logName="check-sync-on-feeds")
                    authenticator = model.connectionInfo.authenticator
                    vd = getFeed(vclient, vworker, authenticator,
                        options.videoFeedId, model)
                    ad = getFeed(aclient, aworker, authenticator,
                        options.audioFeedId, model)
                    vd.addCallback(gotVideoFeed)
                    ad.addCallback(gotAudioFeed)
        whsd.addCallback(gotWorkerHeavenState)
    psd.addCallback(gotPlanetState)

main(sys.argv)