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# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
import gtk
import pygtk
pygtk.require('2.0')
import sys
import pygst
pygst.require('0.10')
import gst
import gst.interfaces
import gobject
gobject.threads_init()
class Glive(gobject.GObject):
__gsignals__ = {
'new-picture': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT])),
'sink': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT]))
}
def __init__(self, parent, width, height):
gobject.GObject.__init__(self)
self._parent = parent
#check out the halfpipe, d00d.
self.pipeline = gst.Pipeline()
self.v4l2src = gst.element_factory_make("v4l2src", "v4l2src")
self.t = gst.element_factory_make("tee", "tee")
self.t_src_pad = self.t.get_request_pad( "src%d" )
self.vscale = gst.element_factory_make("videoscale", "videoscale")
self.ximagesink = gst.element_factory_make("ximagesink", "ximagesink")
self.pipeline.add(self.v4l2src)
self.pipeline.add(self.t)
self.pipeline.add(self.vscale)
self.pipeline.add(self.ximagesink)
self.v4l2src.link(self.t)
videoscale_structure = gst.Structure("video/x-raw-rgb")
videoscale_structure['width'] = width
videoscale_structure['height'] = height
videoscale_structure['bpp'] = 16
videoscale_structure['depth'] = 16
videoscale_caps = gst.Caps(videoscale_structure)
self.t_src_pad.link(self.vscale.get_pad("sink"))
self.vscale.link(self.ximagesink, videoscale_caps)
#self.vscale.link(self.ximagesink)
self.queue = gst.element_factory_make("queue", "queue")
self.queue.set_property("leaky", True)
self.queue.set_property("max-size-buffers", 1)
self.qsrc = self.queue.get_pad( "src" )
self.qsink = self.queue.get_pad("sink")
self.ffmpeg = gst.element_factory_make("ffmpegcolorspace", "ffmpegcolorspace")
self.jpgenc = gst.element_factory_make("jpegenc", "jpegenc")
self.filesink = gst.element_factory_make("fakesink", "fakesink")
self.filesink.connect( "handoff", self.copyframe )
self.filesink.set_property("signal-handoffs", True)
self.pipeline.add(self.queue, self.ffmpeg, self.jpgenc, self.filesink)
#only link at snapshot time
#self.t.link(self.queue)
self.queue.link(self.ffmpeg)
self.ffmpeg.link(self.jpgenc)
self.jpgenc.link(self.filesink)
self.exposureOpen = False
self._bus = self.pipeline.get_bus()
self._CONNECT_SYNC = -1
self._CONNECT_MSG = -1
self.doPostBusStuff()
def copyframe(self, fsink, buffer, pad, user_data=None):
#for some reason, we get two back to back buffers, even though we
#ask for only one.
if (self.exposureOpen):
self.exposureOpen = False
piccy = gtk.gdk.pixbuf_loader_new_with_mime_type("image/jpeg")
piccy.write( buffer )
piccy.close()
pixbuf = piccy.get_pixbuf()
del piccy
self.t.unlink(self.queue)
self.queue.set_property("leaky", True)
gobject.idle_add(self.loadPic, pixbuf)
def loadPic( self, pixbuf ):
self.emit('new-picture', pixbuf)
def takeSnapshot( self ):
if (self.exposureOpen):
return
else:
self.exposureOpen = True
self.t.link(self.queue)
def doPostBusStuff(self):
self._bus.enable_sync_message_emission()
self._bus.add_signal_watch()
self._CONNECT_SYNC = self._bus.connect('sync-message::element', self.on_sync_message)
self._CONNECT_MSG = self._bus.connect('message', self.on_message)
def on_sync_message(self, bus, message):
if message.structure is None:
return
if message.structure.get_name() == 'prepare-xwindow-id':
self.emit('sink', message.src)
message.src.set_property('force-aspect-ratio', True)
def on_message(self, bus, message):
t = message.type
if (t == gst.MESSAGE_ERROR):
err, debug = message.parse_error()
if (self.on_eos):
self.on_eos()
self._playing = False
elif (t == gst.MESSAGE_EOS):
if (self.on_eos):
self.on_eos()
self._playing = False
def on_eos( self ):
pass
def stop(self):
self.pipeline.set_state(gst.STATE_NULL)
def play(self):
self.pipeline.set_state(gst.STATE_PLAYING)
def pause(self):
self.pipeline.set_state(gst.STATE_PAUSED)
class LiveVideoSlot(gtk.EventBox):
__gsignals__ = {
'pixbuf': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ([gobject.TYPE_PYOBJECT])),
}
def __init__(self, width, height):
gtk.EventBox.__init__(self)
self.imagesink = None
self.playa = None
self._width = width
self._height = height
self.unset_flags(gtk.DOUBLE_BUFFERED)
self.connect('focus-in-event', self.focus_in)
self.connect('focus-out-event', self.focus_out)
self.connect("button-press-event", self._button_press_event_cb)
self.connect("expose-event", self._expose_event_cb)
def _expose_event_cb(self, widget, event):
if not self.playa:
self.playa = Glive(self, self._width, self._height)
self.playa.connect('new-picture', self._new_picture_cb)
self.playa.connect('sink', self._new_sink_cb)
def _new_picture_cb(self, playa, pixbuf):
self.emit('pixbuf', pixbuf)
def _new_sink_cb(self, playa, sink):
if (self.imagesink != None):
assert self.window.xid
self.imagesink = None
del self.imagesink
self.imagesink = sink
self.imagesink.set_xwindow_id(self.window.xid)
def _button_press_event_cb(self, widget, event):
self.takeSnapshot()
def focus_in(self, widget, event, args=None):
self.play()
def focus_out(self, widget, event, args=None):
self.stop()
def play( self ):
self.playa.play()
def pause( self ):
self.playa.pause()
def stop( self ):
self.playa.stop()
def takeSnapshot( self ):
self.playa.takeSnapshot()
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