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gmyth-stream/server/plugins/media/gstreamer.py
author rosfran
Tue Apr 03 19:39:23 2007 +0100 (2007-04-03)
branchtrunk
changeset 486 56b98fd15019
child 521 605cbc483e09
permissions -rw-r--r--
[svn r491] Solve bug with the --enable-debug on configure.ac; reversed changes in the GMythBackendInfo object; procedure to close the Recorder in not mandatory. 
     1 import pygst

     2 pygst.require("0.10")

     3 import gst

     4 import gobject

     5 import socket

     6 

     7 class Media:

     8     class StreamData:

     9         stream_count = 0

    10 		

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

    12 

    13 	    self.stream_count += 1

    14 	    self.Id = self.stream_count

    15 	    self.Pipe = pipe

    16 	    self.Abin = abin

    17 	    self.Vbin = vbin

    18             self.Sink = sink

    19 	    self.Loop = gobject.MainLoop()

    20 	    self.ACaps = ""

    21 	    self.VCaps = ""

    22 	    self.Ready = False

    23 

    24 

    25     def __init__(self, config):

    26         # set gstreamer basic options

    27         self.config = config

    28         self.pipe = None

    29         self.streams = []

    30 	self.socket = None

    31 	self.connection = None

    32 	self.addr = None

    33 

    34 

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

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

    37 

    38         ## Pipelines

    39         self.pipe = gst.Pipeline ()

    40         uri = "file://" + filename

    41         print "Opening Uri:" + uri

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

    43         if (src is None):

    44             return None

    45         

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

    47         if (decode is None):

    48             return None

    49 

    50 	mux = gst.element_factory_make ("avimux", "mux")

    51         if (mux is None):

    52             return None

    53 

    54         sink = gst.element_factory_make ("fdsink", "sink")

    55         if (sink is None):

    56             return None

    57 

    58         #Create socket

    59         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    60 	self.socket.bind(('', int (port)))

    61         

    62         #video encode 

    63         #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

    64         vbin = gst.Bin ()

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

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

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

    68         vencode = gst.element_factory_make ("ffenc_h263p", "vencode")

    69 

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

    71             print "Fail to create video encode elements."

    72             return None

    73 

    74         vscale_pad = vscale.get_pad("sink")

    75         if (vscale_pad is None):

    76             print "Fail to get vscale sink pad."

    77             return None

    78 

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

    80         if (vscale_caps is None):

    81             print "Fail to create video caps"

    82             return None

    83 

    84         if (not vscale_pad.set_caps (vscale_caps)):

    85             print "Fail to set video output caps"

    86             return None

    87         

    88         vbin.add (vqueue, vscale, vrate, vencode)

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

    90             print "Fail to link video elements"

    91             return None

    92         

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

    94 	vbin.add_pad (gst.GhostPad ("src", vencode.get_pad ("src")))

    95 

    96         #audio encode

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

    98         abin = gst.Bin ()

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

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

   101         aencode = gst.element_factory_make ("ffenc_ac3", "aencode")

   102 

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

   104             print "Fail to create video encode elements."

   105             return None

   106 

   107         abin.add (aqueue, aconvert, aencode)

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

   109             print "Fail to link video elements"

   110             return None

   111         

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

   113         abin.add_pad (gst.GhostPad ("src", aencode.get_pad ("src")))

   114 

   115         #Finish Pipeline

   116 

   117 	self.pipe.add (src, decode, abin, vbin, mux, sink)

   118 	gst.element_link_many (src, decode)

   119         gst.element_link_many (mux, sink)

   120 

   121         #Linking decode with mux

   122         mux_audio = mux.get_pad ("audio_0")

   123         mux_video = mux.get_pad ("video_0")

   124 

   125 	audio_pad = abin.get_pad ("src")

   126         video_pad = vbin.get_pad ("src")

   127 

   128         if (audio_pad.link (mux_audio) != gst.PAD_LINK_OK):

   129             print "Fail to link audio with mux"

   130             return None

   131  

   132         if (video_pad.link (mux_video) != gst.PAD_LINK_OK):

   133             print "Fail to link audio with mux"

   134             return None

   135 

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

   137 

   138 	bus = self.pipe.get_bus()

   139 	bus.add_signal_watch()

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

   141 	

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

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

   144 

   145 	

   146 	self.pipe.set_state (gst.STATE_PAUSED)

   147         print "Running Pipe"

   148 	stream_data.Loop.run ()

   149         print "End run"

   150 

   151 	a_caps = stream_data.ACaps

   152 	v_caps = stream_data.VCaps

   153 	stream_id = stream_data.Id

   154 

   155         self.streams.append (stream_data)

   156 

   157     def play(self):

   158 

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

   160         try:

   161             if (self.pipe):

   162 		print "Waiting for connection"

   163 		self.socket.listen(1)

   164 		print "Connection Requested"

   165 	        #Create socket

   166 		self.connection, self.addr = self.socket.accept ()

   167 

   168 		stream_data = self.streams[0]

   169 		stream_data.Sink.set_property ("fd", self.connection.fileno());

   170                 print "Connected"

   171 

   172                 self.pipe.set_state(gst.STATE_PLAYING)

   173         except gobject.GError, e:

   174             print "Error: " + str(e)

   175 

   176 

   177     def stop(self):

   178 

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

   180         try:

   181             if (self.pipeline):

   182                 self.connection.close ()

   183                 self.pipeline.set_state(gst.STATE_NULL)

   184         except gobject.GError, e:

   185             print "Error: " + str(e)

   186 

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

   188 

   189         t = message.type

   190         if (t == gst.MESSAGE_STATE_CHANGED):

   191             oldstate = -1

   192             newstate = -1

   193             pending = -1

   194             oldstate, newstate, pending = message.parse_state_changed ()

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

   196                 (newstate == gst.STATE_PAUSED) and \

   197                 (pending == gst.STATE_VOID_PENDING) and \

   198                 (stream_data.Ready == False)):

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

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

   201                     (pending_state == gst.STATE_VOID_PENDING)):

   202                     print "Pipe paused"

   203                     stream_data.Loop.quit ()

   204                     stream_data.Ready = True

   205         elif (t == gst.MESSAGE_ERROR):

   206             err, debug = message.parse_error()

   207 	    print "Error: %s" % err, debug

   208             stream_data.Loop.quit ()

   209             stream_data.Ready = False

   210 

   211         return True

   212  

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

   214 

   215         print "Unknown Type"

   216         return None

   217 

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

   219         

   220         caps = pad.get_caps().to_string()

   221         print "New pad " + caps

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

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

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

   225                 print "Error on link audio pad"

   226                 return None

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

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

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

   230                 print "Error on link video pad"

   231                 return None

   232         else:

   233             print "Invalid caps"

   234 

   235
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