mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
101 lines
3.7 KiB
Python
101 lines
3.7 KiB
Python
import gobject
|
|
gobject.threads_init()
|
|
import gtk
|
|
gtk.gdk.threads_init()
|
|
import hildon
|
|
import gst
|
|
import sys
|
|
|
|
# VideoWidget taken from play.py in gst-python examples
|
|
class VideoWidget(gtk.DrawingArea):
|
|
def __init__(self):
|
|
gtk.DrawingArea.__init__(self)
|
|
self.imagesink = None
|
|
self.unset_flags(gtk.DOUBLE_BUFFERED)
|
|
|
|
def do_expose_event(self, event):
|
|
if self.imagesink:
|
|
self.imagesink.expose()
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
def set_sink(self, sink):
|
|
assert self.window.xid
|
|
self.imagesink = sink
|
|
self.imagesink.set_xwindow_id(self.window.xid)
|
|
|
|
class MaemoGstView:
|
|
|
|
def __init__(self):
|
|
# hildon has one program instance per app, so get instance
|
|
self.p = hildon.Program.get_instance()
|
|
# set name of application: this shows in titlebar
|
|
gtk.set_application_name("Maemo GStreamer VideoTest")
|
|
# stackable window in case we want more windows in future in app
|
|
self.w = hildon.StackableWindow()
|
|
box = gtk.VBox()
|
|
self.video_widget = VideoWidget()
|
|
# video widget we want to expand to size
|
|
box.pack_start(self.video_widget, True, True, 0)
|
|
# a button finger height to play/pause
|
|
self.button = hildon.Button(gtk.HILDON_SIZE_FINGER_HEIGHT,
|
|
hildon.BUTTON_ARRANGEMENT_VERTICAL, title="Pause")
|
|
self.button.connect_after("clicked", self.on_button_clicked)
|
|
# don't want button to expand or fill, just stay finger height
|
|
box.pack_start(self.button, False, False, 0)
|
|
self.w.add(box)
|
|
self.w.connect("delete-event", gtk.main_quit)
|
|
self.p.add_window(self.w)
|
|
self.w.show_all()
|
|
self.start_streaming()
|
|
|
|
def start_streaming(self):
|
|
# we use ximagesink solely for screenshotting ability
|
|
# less cpu usage would happen with videotestsrc ! xvimagesink
|
|
self.pipeline = \
|
|
gst.parse_launch("videotestsrc ! videoscale ! ximagesink")
|
|
bus = self.pipeline.get_bus()
|
|
# need to connect to sync message handler so we get the sink to be
|
|
# embedded at the right time and not have a temporary new window
|
|
bus.enable_sync_message_emission()
|
|
bus.add_signal_watch()
|
|
bus.connect("sync-message::element", self.on_sync_message)
|
|
bus.connect("message", self.on_message)
|
|
self.pipeline.set_state(gst.STATE_PLAYING)
|
|
|
|
def on_sync_message(self, bus, message):
|
|
if message.structure is None:
|
|
return
|
|
if message.structure.get_name() == 'prepare-xwindow-id':
|
|
# all this is needed to sync with the X server before giving the
|
|
# x id to the sink
|
|
gtk.gdk.threads_enter()
|
|
gtk.gdk.display_get_default().sync()
|
|
self.video_widget.set_sink(message.src)
|
|
message.src.set_property("force-aspect-ratio", True)
|
|
gtk.gdk.threads_leave()
|
|
|
|
def on_message(self, bus, message):
|
|
if message.type == gst.MESSAGE_ERROR:
|
|
err, debug = message.parse_error()
|
|
hildon.hildon_banner_show_information(self.w, '',
|
|
"Error: %s" % err)
|
|
|
|
def on_button_clicked(self, widget):
|
|
success, state, pending = self.pipeline.get_state(1)
|
|
# do not listen if in middle of state change
|
|
if not pending:
|
|
if state == gst.STATE_PLAYING:
|
|
self.pipeline.set_state(gst.STATE_PAUSED)
|
|
self.button.set_label("Play")
|
|
else:
|
|
self.pipeline.set_state(gst.STATE_PLAYING)
|
|
self.button.set_label("Pause")
|
|
|
|
def main():
|
|
view = MaemoGstView()
|
|
gtk.main()
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(main())
|