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