screenlets.plugins.Gstreamer

Package screenlets :: Package plugins :: Module Gstreamer |
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# Source Code for Module screenlets.plugins.Gstreamer

      1  # This program is free software: you can redistribute it and/or modify
      2  # it under the terms of the GNU General Public License as published by
      3  # the Free Software Foundation, either version 3 of the License, or
      4  # (at your option) any later version.
      5  #
      6  # This program is distributed in the hope that it will be useful,
      7  # but WITHOUT ANY WARRANTY; without even the implied warranty of
      8  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      9  # GNU General Public License for more details.
     10  #
     11  # You should have received a copy of the GNU General Public License
     12  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     13
     14  import pygtk, gtk, gobject
     15  import pygst
     16  pygst.require("0.10")
     17  import gst
     18
     19 -class gstreamer(object):
     20
     21 -        def __init__(self):
     22                  self.player = gst.element_factory_make("playbin", "player")
     23                  fakesink = gst.element_factory_make('fakesink', "my-fakesink")
     24                  self.player.set_property("video-sink", fakesink)
     25                  bus = self.player.get_bus()
     26                  bus.add_signal_watch()
     27                  bus.connect('message', self.on_message)
     28
     29                  self.player = gst.Pipeline("player")
     30                  source = gst.element_factory_make("filesrc", "file-source")
     31                  self.player.add(source)
     32                  demuxer = gst.element_factory_make("oggdemux", "demuxer")
     33                  self.player.add(demuxer)
     34                  demuxer.connect("pad-added", self.demuxer_callback)
     35                  self.audio_decoder = gst.element_factory_make("vorbisdec", "vorbis-decoder")
     36                  self.player.add(self.audio_decoder)
     37                  audioconv = gst.element_factory_make("audioconvert", "converter")
     38                  self.player.add(audioconv)
     39                  audiosink = gst.element_factory_make("autoaudiosink", "audio-output")
     40                  self.player.add(audiosink)
     41
     42                  gst.element_link_many(source, demuxer)
     43                  gst.element_link_many(self.audio_decoder, audioconv, audiosink)
     44
     45                  bus = self.player.get_bus()
     46                  bus.add_signal_watch()
     47                  bus.connect("message", self.on_message)
     48
     49
     50 -        def demuxer_callback(self, demuxer, pad):
     51                  adec_pad = self.audio_decoder.get_pad("sink")
     52                  pad.link(adec_pad)
     53
     54
     55 -        def start(self):
     56                  try:
     57                          self.player.set_property('uri', ta)
     58                          self.player.set_state(gst.STATE_PLAYING)
     59                  except Exception, ex:
     60                          print 'unable to connect'
     61
     62 -        def stop(self):
     63
     64                          self.player.set_state(gst.STATE_NULL)
     65
     66 -        def on_message(self, bus, message):
     67                  t = message.type
     68                  if t == gst.MESSAGE_EOS:
     69                          self.player.set_state(gst.STATE_NULL)
     70
     71                  elif t == gst.MESSAGE_ERROR:
     72                          err, debug = message.parse_error()
     73                          print "Error: %s" % err, debug
     74                          self.player.set_state(gst.STATE_NULL)
     75
     76 -        def rewind_callback(self, w):
     77                  pos_int = self.player.query_position(self.time_format, None)[0]
     78                  seek_ns = pos_int - (10 * 1000000000)
     79                  self.player.seek_simple(self.time_format, gst.SEEK_FLAG_FLUSH, seek_ns)
     80
     81 -        def forward_callback(self, w):
     82                  pos_int = self.player.query_position(self.time_format, None)[0]
     83                  seek_ns = pos_int + (10 * 1000000000)
     84                  self.player.seek_simple(self.time_format, gst.SEEK_FLAG_FLUSH, seek_ns)
     85
     86 -        def convert_ns(self, time_int):
     87                  time_int = time_int / 1000000000
     88                  time_str = ""
     89                  if time_int >= 3600:
     90                          _hours = time_int / 3600
     91                          time_int = time_int - (_hours * 3600)
     92                          time_str = str(_hours) + ":"
     93                  if time_int >= 600:
     94                          _mins = time_int / 60
     95                          time_int = time_int - (_mins * 60)
     96                          time_str = time_str + str(_mins) + ":"
     97                  elif time_int >= 60:
     98                          _mins = time_int / 60
     99                          time_int = time_int - (_mins * 60)
    100                          time_str = time_str + "0" + str(_mins) + ":"
    101                  else:
    102                          time_str = time_str + "00:"
    103                  if time_int > 9:
    104                          time_str = time_str + str(time_int)
    105                  else:
    106                          time_str = time_str + "0" + str(time_int)
    107
    108                  return time_str
    109