voctocore/lib/backgroundsource.py



#!/usr/bin/python3
import logging
from gi.repository import Gst

from lib.config import Config
from lib.tcpsingleconnection import TCPSingleConnection

class BackgroundSource(TCPSingleConnection):
    def __init__(self, port):
        self.log = logging.getLogger('BackgroundSource')
        super().__init__(port)

    def on_accepted(self, conn, addr):
        pipeline = """
            fdsrc fd={fd} !
            matroskademux !
            {vcaps} !
            intervideosink channel=mixer_background
        """.format(
            fd=conn.fileno(),
            vcaps=Config.get('mix', 'videocaps')
        )

        self.log.debug('Launching Source-Pipeline:\n%s', pipeline)
        self.receiverPipeline = Gst.parse_launch(pipeline)

        self.log.debug('Binding End-of-Stream-Signal on Source-Pipeline')
        self.receiverPipeline.bus.add_signal_watch()
        self.receiverPipeline.bus.connect("message::eos", self.on_eos)
        self.receiverPipeline.bus.connect("message::error", self.on_error)

        self.receiverPipeline.set_state(Gst.State.PLAYING)


    def on_eos(self, bus, message):
        self.log.debug('Received End-of-Stream-Signal on Source-Pipeline')
        if self.currentConnection is not None:
            self.disconnect()

    def on_error(self, bus, message):
        self.log.debug('Received Error-Signal on Source-Pipeline')
        (error, debug) = message.parse_error()
        self.log.debug('Error-Details: #%u: %s', error.code, debug)

        if self.currentConnection is not None:
            self.disconnect()

    def disconnect(self):
        self.receiverPipeline.set_state(Gst.State.NULL)
        self.receiverPipeline = None
        self.close_connection()