From ee6de7c2457c521edb57c5e0a716f9f0dbe4580c Mon Sep 17 00:00:00 2001 From: Zaheer Abbas Merali Date: Thu, 15 Oct 2009 14:15:37 +0100 Subject: [PATCH] examples: add a simple Maemo 5 example --- examples/Makefile.am | 3 +- examples/maemogst.py | 101 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 103 insertions(+), 1 deletion(-) create mode 100644 examples/maemogst.py diff --git a/examples/Makefile.am b/examples/Makefile.am index 495e473bc9..c6338dec7d 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -16,6 +16,7 @@ examples_DATA = \ remuxer.py \ sinkelement.py \ vumeter.py \ - decodebin.py + decodebin.py \ + maemogst.py EXTRA_DIST = $(examples_DATA) diff --git a/examples/maemogst.py b/examples/maemogst.py new file mode 100644 index 0000000000..1f9ae0de26 --- /dev/null +++ b/examples/maemogst.py @@ -0,0 +1,101 @@ +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())