#Copyright (c) 2008, Media Modifications Ltd.

#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:

#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.

#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.

import gobject
gobject.threads_init()
import pygst
pygst.require('0.10')
import gst

import logging
logger = logging.getLogger('record:gplay.py')

class Gplay(gobject.GObject):
    __gsignals__ = {
        'playback-status-changed': (gobject.SIGNAL_RUN_LAST, gobject.TYPE_NONE, (gobject.TYPE_INT, gobject.TYPE_FLOAT)),
    }

    def __init__(self, activity_obj):
        super(Gplay, self).__init__()
        self.activity = activity_obj
        self._playback_monitor_handler = None
        self._player = gst.element_factory_make('playbin')

        bus = self._player.get_bus()
        bus.add_signal_watch()
        bus.connect('message::error', self._bus_error)
        bus.connect('message::eos', self._bus_eos)

    def _bus_error(self, bus, message):
        err, debug = message.parse_error()
        logger.error('bus error=%s debug=%s' % (err, debug))

    def _bus_eos(self, bus, message):
        self.stop()

    def set_location(self, location):
        if self._player.get_property('uri') == location:
            self.seek(0)
            return

        self._player.set_state(gst.STATE_READY)
        self._player.set_property('uri', location)

    def seek(self, position):
        if position == 0:
            location = 0
        else:
            duration = self._player.query_duration(gst.FORMAT_TIME, None)[0]
            location = duration * (position / 100)

        event = gst.event_new_seek(1.0, gst.FORMAT_TIME, gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE, gst.SEEK_TYPE_SET, location, gst.SEEK_TYPE_NONE, 0)
        res = self._player.send_event(event)
        if res:
            self._player.set_new_stream_time(0L)

    def pause(self):
        self._player.set_state(gst.STATE_PAUSED)

    def play(self):
        if self.get_state() == gst.STATE_PLAYING:
            return

        if not self._player.props.video_sink:
            sink = gst.element_factory_make('xvimagesink')
            sink.props.force_aspect_ratio = True
            self._player.props.video_sink = sink

        self.activity.set_gplay_sink(self._player.props.video_sink)
        self._player.set_state(gst.STATE_PLAYING)
        self._emit_playback_status(0)

        self._playback_monitor_handler = gobject.timeout_add(500, self._playback_monitor)

    def _playback_monitor(self):
        try:
            position = self._player.query_position(gst.FORMAT_TIME)[0]
            duration = self._player.query_duration(gst.FORMAT_TIME)[0]
        except gst.QueryError:
            return True

        value = (float(position) / float(duration)) * 100.0
        self._emit_playback_status(value)
        return True

    def _emit_playback_status(self, position):
        state = self._player.get_state()[1]
        self.emit('playback-status-changed', state, position)

    def get_state(self):
        return self._player.get_state()[1]

    def stop(self):
        if self._playback_monitor_handler:
            gobject.source_remove(self._playback_monitor_handler)
            self._playback_monitor_handler = None

        self._player.set_state(gst.STATE_NULL)
        self._emit_playback_status(0)