#!/usr/bin/env python3
#
# Player - a very simple GStreamer player
#
# Copyright (C) 2016  Antonio Ospite <ao2@ao2.it>
#
# 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 3 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import gi

gi.require_version('Gst', '1.0')
from gi.repository import Gst
Gst.init(None)

from gi.repository import GObject
GObject.threads_init()


class Player(object):
    def __init__(self, pipeline):
        self.pipeline = pipeline
        self.mainloop = GObject.MainLoop()

    @staticmethod
    def from_pipeline_string(pipeline_string):
        pipeline = Gst.parse_launch(pipeline_string)
        return Player(pipeline)

    def quit(self):
        self.mainloop.quit()
        self.pipeline.set_state(Gst.State.NULL)

    def bus_message_cb(self, unused_bus, message):
        if message.type == Gst.MessageType.EOS:
            self.quit()

    def play(self):
        bus = self.pipeline.get_bus()
        bus.add_signal_watch()
        bus.connect("message", self.bus_message_cb)

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

        try:
            self.mainloop.run()
        except KeyboardInterrupt:
            self.quit()
            return 1

        return 0