1 files changed, 69 insertions, 0 deletions
diff --git a/plugins/camera_sensor/tacamera.py b/plugins/camera_sensor/tacamera.py
new file mode 100644
index 0000000..fc0804d
--- /dev/null
+++ b/plugins/camera_sensor/tacamera.py
@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+#Copyright (c) 2010, Walter Bender
+#Copyright (c) 2010, Tony Forster
+
+#Permission is hereby granted, free of charge, to any person obtaining a copy
+#of this software and associated documentation files (the "Software"), to deal
+#in the Software without restriction, including without limitation the rights
+#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+#copies of the Software, and to permit persons to whom the Software is
+#furnished to do so, subject to the following conditions:
+
+#The above copyright notice and this permission notice shall be included in
+#all copies or substantial portions of the Software.
+
+#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+#THE SOFTWARE.
+
+import gst, time
+import gobject
+
+from TurtleArt.tautils import debug_output
+
+
+class Camera():
+    ''' Sets up a pipe from the camera to a pixbuf and emits a signal
+    when the image is ready. '''
+
+    def __init__(self, device='/dev/video0'):
+        ''' Prepare camera pipeline to pixbuf and signal watch '''
+        self.pipe = gst.Pipeline('pipeline')
+        v4l2src = gst.element_factory_make('v4l2src', None)
+        v4l2src.props.device = device
+        self.pipe.add(v4l2src)
+        ffmpegcolorspace = gst.element_factory_make('ffmpegcolorspace', None)
+        self.pipe.add(ffmpegcolorspace)
+        gdkpixbufsink = gst.element_factory_make('gdkpixbufsink', None)
+        self.pipe.add(gdkpixbufsink)
+        gst.element_link_many(v4l2src, ffmpegcolorspace, gdkpixbufsink)
+        if self.pipe is not None:
+            self.bus = self.pipe.get_bus()
+            self.bus.add_signal_watch()
+            self.bus.connect('message', self._on_message)
+            status = True
+        else:
+            status = False
+
+    def _on_message(self, bus, message):
+        ''' We get a message if a pixbuf is available '''
+        if message.structure is not None:
+            if message.structure.get_name() == 'pixbuf':
+                self.pixbuf = message.structure['pixbuf']
+                self.image_ready = True
+
+    def start_camera_input(self):
+        ''' Start grabbing '''
+        self.pixbuf = None
+        self.image_ready = False
+        self.pipe.set_state(gst.STATE_PLAYING)
+        while not self.image_ready:
+            self.bus.poll(gst.MESSAGE_ANY, -1)
+
+    def stop_camera_input(self):
+        ''' Stop grabbing '''
+        self.pipe.set_state(gst.STATE_NULL)