Added an example for video in GUI

diff --git a/.gitignore b/.gitignore
new file mode 100644 (file)
index 0000000..06661e9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+# Ignore Glade's temp files
+*~

diff --git a/example3.glade b/example3.glade
new file mode 100644 (file)
index 0000000..8a73a3b
--- /dev/null
+++ b/example3.glade
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.16.1 -->
+<interface>
+  <requires lib="gtk+" version="3.10"/>
+  <object class="GtkWindow" id="mainwindow">
+    <property name="can_focus">False</property>
+    <property name="title" translatable="yes">GStreamer video test</property>
+    <property name="icon_name">video-display</property>
+    <child>
+      <object class="GtkBox" id="box1">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkAlignment" id="alignment2">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="margin_left">8</property>
+            <property name="margin_right">8</property>
+            <property name="margin_top">8</property>
+            <child>
+              <object class="GtkDrawingArea" id="viewport">
+                <property name="name">viewport</property>
+                <property name="width_request">320</property>
+                <property name="height_request">240</property>
+                <property name="visible">True</property>
+                <property name="app_paintable">True</property>
+                <property name="can_focus">False</property>
+                <property name="hexpand">True</property>
+                <property name="vexpand">True</property>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkAlignment" id="alignment1">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="margin_left">8</property>
+            <property name="margin_right">8</property>
+            <property name="margin_top">8</property>
+            <property name="margin_bottom">8</property>
+            <property name="yalign">1</property>
+            <child>
+              <object class="GtkButtonBox" id="buttonbox1">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="spacing">8</property>
+                <property name="homogeneous">True</property>
+                <property name="baseline_position">bottom</property>
+                <property name="layout_style">center</property>
+                <child>
+                  <object class="GtkButton" id="play">
+                    <property name="label">gtk-media-play</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="use_stock">True</property>
+                    <property name="always_show_image">True</property>
+                    <signal name="clicked" handler="on_play_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton" id="stop">
+                    <property name="label">gtk-media-stop</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="use_stock">True</property>
+                    <property name="always_show_image">True</property>
+                    <signal name="clicked" handler="on_stop_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkButton" id="quit">
+                    <property name="label">gtk-quit</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="use_stock">True</property>
+                    <property name="always_show_image">True</property>
+                    <signal name="clicked" handler="on_quit_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

diff --git a/example3.py b/example3.py
new file mode 100755 (executable)
index 0000000..dd99993
--- /dev/null
+++ b/example3.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+# Let's see if we can get a viewport working, building on code from example2.py
+# Some final info and updated code stolen from
+# http://bazaar.launchpad.net/~jderose/+junk/gst-examples/view/head:/video-player-1.0
+
+# GdkX11 to get access to xid, GstVideo to get access to set_window_handle
+from gi.repository import Gtk, Gst, GdkX11, GstVideo
+import signal
+
+class Main:
+    def __init__(self):
+        
+        # Create gui bits and bobs
+
+        self.mainwindow = Gtk.Builder()
+        self.mainwindow.add_from_file("example3.glade")
+        
+        signals = {
+            "on_play_clicked" : self.OnPlay,
+            "on_stop_clicked" : self.OnStop,
+            "on_quit_clicked" : self.OnQuit,
+        }
+
+        self.mainwindow.connect_signals(signals)
+
+        # Create GStreamer bits and bobs
+
+        # Initiate the pipeline
+        Gst.init(None)
+        self.pipeline = Gst.Pipeline("mypipeline")
+
+        # Add a videotestsrc element to the pipeline, set it to pattern "snow."
+        self.videotestsrc = Gst.ElementFactory.make("videotestsrc", "videosource")
+        self.videotestsrc.set_property("pattern", "snow")
+        self.pipeline.add(self.videotestsrc)
+        
+        # Add a capsfilter that we want to apply to our videotestsrc
+        self.videotestcaps = Gst.ElementFactory.make("capsfilter", "videotestcaps")
+        self.videotestcaps.set_property("caps",Gst.Caps.from_string("video/x-raw,width=640,height=480"))
+        self.pipeline.add(self.videotestcaps)
+        
+        # Link the capsfilter to the videotestsrc
+        self.videotestsrc.link(self.videotestcaps)
+
+        # Add a videosink element to the pipeline
+        self.videosink = Gst.ElementFactory.make("autovideosink", "videosink")
+        self.pipeline.add(self.videosink)
+
+        # Link the already linked videotestcaps to the sink
+        self.videotestcaps.link(self.videosink)
+        
+        # Set up a bus to our pipeline to get notified when the video is ready
+        self.bus = self.pipeline.get_bus()
+        self.bus.enable_sync_message_emission()
+        self.bus.connect("sync-message::element", self.OnSyncElement)
+        
+        # Summon the window and connect the window's close button to quit
+        self.window = self.mainwindow.get_object("mainwindow")
+        self.window.connect("delete-event", Gtk.main_quit)
+        self.window.show_all()
+        
+        # Get window ID of the viewport widget from the GUI
+        self.win_id = self.mainwindow.get_object("viewport").get_window().get_xid()
+
+
+    # When we get a message that video is ready to display, set the 
+    # correct window id to hook it to our viewport
+    def OnSyncElement(self, bus, message):
+        if message.get_structure().get_name() == "prepare-window-handle":
+            print "prepare-window-handle"
+            message.src.set_window_handle(self.win_id)
+
+    def OnPlay(self, widget):
+        print "play"
+        self.pipeline.set_state(Gst.State.PLAYING)
+
+    def OnStop(self, widget):
+        print "stop"
+        self.pipeline.set_state(Gst.State.READY)
+        
+    def OnQuit(self, widget):
+        print "quit"
+        Gtk.main_quit()
+
+    # Workaround to get Ctrl+C to terminate from command line
+    # ref: https://bugzilla.gnome.org/show_bug.cgi?id=622084#c12
+    signal.signal(signal.SIGINT, signal.SIG_DFL)
+
+start = Main()
+Gtk.main()