From 3d80025b7fe79339c7985e2e10161447eea46d1e Mon Sep 17 00:00:00 2001
From: Christian Franke <nobody@nowhere.ws>
Date: Wed, 16 Nov 2011 04:22:27 +0100
Subject: Initial commit

---
 remote/projector.py | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100755 remote/projector.py

(limited to 'remote/projector.py')

diff --git a/remote/projector.py b/remote/projector.py
new file mode 100755
index 0000000..16cceb8
--- /dev/null
+++ b/remote/projector.py
@@ -0,0 +1,128 @@
+#!/usr/bin/python2
+
+import subprocess
+import os
+import time
+import sys
+import signal
+import select
+import errno
+import inspect
+
+from SimpleXMLRPCServer import SimpleXMLRPCServer
+
+projection_process = None
+default_task = [
+        './brause.py',
+        'http://sublab.rotefraktion.org/loungescreen/'
+]
+projection_task = default_task
+
+class ChildProcess(subprocess.Popen):
+    def __init__(self, *args, **kwargs):
+        subprocess.Popen.__init__(self, *args, **kwargs)
+        self._kill = os.kill
+    def __del__(self):
+        try:
+            self._kill(self.pid, 9)
+            self.poll()
+        except EnvironmentError as e:
+            if e.args[0] != errno.ESRCH:
+                raise
+
+def restart_projection(dummy=None):
+    global projection_process
+    global projection_task
+
+    print "Replacing projection_process..."
+    projection_process = ChildProcess(projection_task)
+
+def sigchld(signum, trace):
+    global projection_process
+
+    print "Got SIGCHLD"
+    if projection_process is not None and \
+            projection_process.poll() is None:
+        # This info was not about the current projection_process...
+        return
+
+    # Current projection_process exited, fallback to default
+    reset_projection()
+
+def display_url(url):
+    global projection_task
+
+    projection_task = [
+        './brause.py',
+        url
+    ]
+    restart_projection()
+
+    return 0 # For RPC
+
+def display_video(url):
+    global projection_task
+
+    if not (url.startswith('http://') or \
+            url.startswith('ftp://')):
+        raise ValueError('URL should point to a http/ftp resource...')
+
+    projection_task = [
+        'mplayer',
+        '-fs',
+        url
+    ]
+    restart_projection()
+
+    return 0 # For RPC
+
+def reset_projection():
+    global projection_task
+    global default_task
+
+    projection_task = default_task
+    restart_projection()
+
+    return 0 # For RPC
+
+def start_vnc(port):
+    global projection_task
+
+    if type(port) is not int:
+        raise TypeError("start_vnc expects (port:int) as arguments")
+
+    # Worst Monkey Patch ever (tm)
+    host = inspect.stack()[3][0].f_locals['self'].client_address[0]
+    print 'Connecting vncviewer to %s:%d' % (host,port)
+
+    projection_task = [
+            "vncviewer", "-fullscreen",
+            "-viewonly", "%s::%d" % (host,port) ]
+    restart_projection()
+
+    return 0
+
+def main():
+    global projecting
+    subprocess.check_call("xset s off".split())
+    subprocess.check_call("xset -dpms".split())
+
+    signal.signal(signal.SIGCHLD, sigchld)
+    restart_projection()
+
+    server = SimpleXMLRPCServer(("0.0.0.0", 8082))
+    server.register_function(display_url)
+    server.register_function(display_video)
+    server.register_function(reset_projection)
+    server.register_function(start_vnc)
+
+    while True:
+        try:
+            server.serve_forever()
+        except select.error as e:
+            if e.args[0] == errno.EINTR:
+                continue
+            raise
+
+if __name__ == '__main__':
+    main()
-- 
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