import pygst

 pygst.require("0.10")

 import gst

 import gobject

 class Media:

     class StreamData:

         stream_count = 0

         def __init__ (self, pipe, abin, vbin):

 	    self.stream_count += 1

 	    self.Id = self.stream_count

 	    self.Pipe = pipe

 	    self.Abin = abin

 	    self.Vbin = vbin

 	    self.Loop = gobject.MainLoop()

 	    self.ACaps = ""

 	    self.VCaps = ""

 	    self.Ready = False

     def __init__(self, config):

         # set gstreamer basic options

         self.config = config

         self.pipe = None

         self.streams = []

     def setup(self, filename, mux, vcodec, vbitrate,

               fps, acodec, abitrate, width, height, port, options):

         ## Pipelines

         self.pipe = gst.Pipeline ()

         uri = "file://" + filename

         print "Opening Uri:" + uri

         src = gst.element_make_from_uri (gst.URI_SRC, uri, "src")

         if (src is None):

             return None

         decode = gst.element_factory_make ("decodebin", "decode")

         if (decode is None):

             return None

         #video encode 

         #queue ! videoscale ! video/x-raw-yuv,width=240,height=144 ! videorate ! ffenc_h263p bitrate=256000 me-method=2 ! rtph263ppay ! udpsink  host=224.0.0.1 port=5000

         vbin = gst.Bin ()

         vqueue = gst.element_factory_make ("queue", "vqueue")

         vscale = gst.element_factory_make ("videoscale", "vscale")

         vrate = gst.element_factory_make ("videorate", "vrate")

         vencode = gst.element_factory_make ("ffenc_mpeg4", "vencode")

         vpay = gst.element_factory_make ("rtpmp4vpay", "vpay")

         vsink = gst.element_factory_make ("udpsink", "vsink")

         if (None in [vbin, vqueue, vscale, vrate, vencode, vpay, vsink]):

             print "Fail to create video encode elements."

             return None

         vscale_pad = vscale.get_pad("sink")

         if (vscale_pad is None):

             print "Fail to get vscale sink pad."

             return None

         vscale_caps = gst.caps_from_string ("video/x-raw-yuv, width=%s, height=%s" % (width, height))

         if (vscale_caps is None):

             print "Fail to create video caps"

             return None

         if (not vscale_pad.set_caps (vscale_caps)):

             print "Fail to set video output caps"

             return None

         vencode.set_property ("bitrate", 256000)

         vencode.set_property ("me-method", 2)

         vsink.set_property ("host", "224.0.0.1")

         vsink.set_property ("port", 5000)

         vbin.add (vqueue, vscale, vrate, vencode, vpay, vsink)

         if (not gst.element_link_many (vqueue,  vscale, vrate, vencode, vpay, vsink)):

             print "Fail to link video elements"

             return None

         vbin.add_pad (gst.GhostPad ("sink", vqueue.get_pad ("sink")))

         #audio encode

         #audio/x-raw-int ! queue ! audioconvert ! faac ! rtpmp4gpay !  udpsink name=upd_audio host=224.0.0.1 port=5002

         abin = gst.Bin ()

         aqueue = gst.element_factory_make ("queue", "vqueue")

         aconvert = gst.element_factory_make ("audioconvert", "aconvert")

         aencode = gst.element_factory_make ("faac", "aencode")

         apay = gst.element_factory_make ("rtpmp4gpay", "apay")

         asink = gst.element_factory_make ("udpsink", "asink")

         if (None in [abin, aqueue, aconvert, aencode, apay, asink]):

             print "Fail to create video encode elements."

             return None

         asink.set_property ("host", "224.0.0.1")

         asink.set_property ("port", 5002)

         abin.add (aqueue, aconvert, aencode, apay, asink)

         if (not gst.element_link_many (aqueue, aconvert, aencode, apay, asink)):

             print "Fail to link video elements"

             return None

         abin.add_pad (gst.GhostPad ("sink", aqueue.get_pad ("sink")))

 	self.pipe.add (src, decode, abin, vbin)

 	gst.element_link_many (src, decode)

 	stream_data = self.StreamData (self.pipe, abin, vbin)

 	bus = self.pipe.get_bus()

 	bus.add_signal_watch()

 	bus.connect("message", self.__on_bus_message, stream_data)

 	decode.connect("new-decoded-pad", self.__on_decode_new_pad, stream_data)

 	decode.connect("unknown-type", self.__on_decode_unknown_type, stream_data)

 	self.pipe.set_state (gst.STATE_PAUSED)

         print "Running Pipe"

 	stream_data.Loop.run ()

         print "End run"

 	a_caps = stream_data.ACaps

 	v_caps = stream_data.VCaps

 	stream_id = stream_data.Id

         self.streams.append (stream_data)

     def play(self):

         print "Trying to play pipeline: %s" % self.pipe

         try:

             if (self.pipe):

                 self.pipe.set_state(gst.STATE_PLAYING)

         except gobject.GError, e:

             print "Error: " + str(e)

     def stop(self):

         print "Trying to stop pipeline: %s" % self.pipe

         try:

             if (self.pipeline):

                 self.pipeline.set_state(gst.STATE_NULL)

         except gobject.GError, e:

             print "Error: " + str(e)

     def __on_bus_message (self, bus, message, stream_data):

         t = message.type

         if (t == gst.MESSAGE_STATE_CHANGED):

             oldstate = -1

             newstate = -1

             pending = -1

             oldstate, newstate, pending = message.parse_state_changed ()

             if ((oldstate == gst.STATE_READY) and \

                 (newstate == gst.STATE_PAUSED) and \

                 (pending == gst.STATE_VOID_PENDING) and \

                 (stream_data.Ready == False)):

                 state_changed_status, current_state, pending_state = stream_data.Pipe.get_state () 

 		if ((current_state == gst.STATE_PAUSED) and \

                     (pending_state == gst.STATE_VOID_PENDING)):

                     print "Pipe paused"

                     self.__fill_sink_pads (stream_data)

                     stream_data.Loop.quit ()

                     stream_data.Ready = True

         elif (t == gst.MESSAGE_ERROR):

             err, debug = message.parse_error()

 	    print "Error: %s" % err, debug

             stream_data.Loop.quit ()

             stream_data.Ready = False

         return True

     def __fill_sink_pads (self, stream_data):

         asink = stream_data.Abin.get_by_name ("asink")

         vsink = stream_data.Vbin.get_by_name ("vsink")

         asink_pad = asink.get_pad ("sink")

         stream_data.ACaps = asink_pad.get_negotiated_caps().to_string()

         print "ACAPS " + stream_data.ACaps

         vsink_pad = vsink.get_pad ("sink")

         stream_data.VCaps = vsink_pad.get_negotiated_caps().to_string()

         print "ACAPS " + stream_data.VCaps

     def __on_decode_unknown_type (self, decode, pad, caps, stream_data):

         print "Unknown Type"

         return None

     def __on_decode_new_pad (self, decode, pad, arg1, stream_data):

         caps = pad.get_caps().to_string()

         print "New pad " + caps

 	if (caps.rfind ("audio") != -1):

             apad = stream_data.Abin.get_pad ("sink")

             if (pad.link (apad) != gst.PAD_LINK_OK):

                 print "Error on link audio pad"

                 return None

         elif (caps.rfind ("video") != -1):

             vpad = stream_data.Vbin.get_pad ("sink")

             if (pad.link (vpad) != gst.PAD_LINK_OK):

                 print "Error on link video pad"

                 return None

         else:

             print "Invalid caps"