Initial commit, not functional yet.

diff --git a/stream.glade b/stream.glade
new file mode 100644 (file)
index 0000000..1d98556
--- /dev/null
+++ b/stream.glade
@@ -0,0 +1,109 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.10 -->
+  <!-- interface-naming-policy toplevel-contextual -->
+  <object class="GtkImage" id="image1">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-connect</property>
+  </object>
+  <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="GtkVBox" id="box1">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <child>
+          <object class="GtkAlignment" id="alignment2">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <child>
+              <object class="GtkDrawingArea" id="viewport">
+                <property name="width_request">1280</property>
+                <property name="height_request">720</property>
+                <property name="visible">True</property>
+                <property name="app_paintable">True</property>
+                <property name="can_focus">False</property>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">True</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="yalign">1</property>
+            <child>
+              <object class="GtkHButtonBox" id="buttonbox1">
+                <property name="height_request">46</property>
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="spacing">8</property>
+                <property name="homogeneous">True</property>
+                <property name="layout_style">center</property>
+                <child>
+                  <object class="GtkButton" id="play">
+                    <property name="label">Stream</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">True</property>
+                    <property name="image">image1</property>
+                    <signal name="clicked" handler="on_stream_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">True</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>
+                    <signal name="clicked" handler="on_stop_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">True</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>
+                    <signal name="clicked" handler="on_quit_clicked" swapped="no"/>
+                  </object>
+                  <packing>
+                    <property name="expand">True</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="pack_type">end</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

diff --git a/stream.py b/stream.py
new file mode 100755 (executable)
index 0000000..33cd7c1
--- /dev/null
+++ b/stream.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+# GdkX11 to get access to xid, GstVideo to get access to set_window_handle
+import gi
+gi.require_version('Gtk', '3.0')
+gi.require_version('Gst', '1.0')
+gi.require_version('GstVideo', '1.0')
+from gi.repository import Gtk, Gst, GstVideo, GdkX11
+import signal
+
+settings = Gtk.Settings.get_default()
+settings.props.gtk_button_images = True
+
+class Main:
+    def __init__(self):
+
+        # Create gui bits and bobs
+
+        self.mainwindow = Gtk.Builder()
+        self.mainwindow.add_from_file("stream.glade")
+
+        signals = {
+            "on_stream_clicked" : self.OnStream,
+            "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 our video source, the first v4l2 device we can find
+        self.videosrc = Gst.ElementFactory.make("v4l2src", "videosource")
+        self.pipeline.add(self.videosrc)
+
+        # Add a jpeg decoder to force the v4l2src to output jpeg data
+        self.jpegdec = Gst.ElementFactory.make("jpegdec", "jpegdec")
+        self.pipeline.add(self.jpegdec)
+        self.videosrc.link(self.jpegdec)
+
+        # Add some video convert magic
+        self.videoconvert = Gst.ElementFactory.make("videoconvert", "videoconvert")
+        self.pipeline.add(self.videoconvert)
+        self.jpegdec.link(self.videoconvert)
+
+        # Add a videosink element to the pipeline
+        self.videosink = Gst.ElementFactory.make("autovideosink", "videosink")
+        self.videosink.set_property("sync", False)
+        self.pipeline.add(self.videosink)
+        self.videoconvert.link(self.videosink)
+
+        # Start playing
+        self.pipeline.set_state(Gst.State.PLAYING)
+
+        # 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 OnStream(self, widget):
+        print "stream"
+        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()