From ed0887962c21337efed2925a4826e5158eaaeb7a Mon Sep 17 00:00:00 2001
From: Joseph Coffland <joseph@cauldrondevelopment.com>
Date: Sat, 15 Dec 2018 13:13:36 -0800
Subject: [PATCH] Only allow one camera stream at a time

---
 src/py/bbctrl/Camera.py | 197 ++++------------------------------------
 1 file changed, 20 insertions(+), 177 deletions(-)

diff --git a/src/py/bbctrl/Camera.py b/src/py/bbctrl/Camera.py
index 98a0403..7dc7262 100755
--- a/src/py/bbctrl/Camera.py
+++ b/src/py/bbctrl/Camera.py
@@ -36,6 +36,7 @@ import pyudev
 import base64
 import socket
 from tornado import gen, web, iostream
+import bbctrl
 
 try:
     import v4l2
@@ -45,176 +46,6 @@ except:
 log = logging.getLogger('Camera')
 
 
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-'''
-
-
 def array_to_string(a): return ''.join([chr(i) for i in a])
 
 
@@ -437,7 +268,8 @@ class Camera(object):
         self.fps = ctrl.args.fps
         self.fourcc = string_to_fourcc(ctrl.args.fourcc)
 
-        self.offline_jpg = self._format_frame(base64.b64decode(offline_jpg))
+        self.offline_jpg = self._get_image_resource('http/images/offline.jpg')
+        self.in_use_jpg = self._get_image_resource('http/images/in-use.jpg')
         self.dev = None
         self.clients = []
         self.path = None
@@ -468,6 +300,13 @@ class Camera(object):
         if action == 'remove' and path == self.path: self.close()
 
 
+    def _get_image_resource(self, path):
+        path = bbctrl.get_resource(path)
+
+        with open(path, 'rb') as f:
+            return self._format_frame(f.read())
+
+
     def _format_frame(self, frame):
         frame = [
             b'Content-type: image/jpeg\r\n',
@@ -478,13 +317,12 @@ class Camera(object):
 
 
     def _send_frame(self, frame):
-        frame = self._format_frame(frame)
+        if not len(self.clients): return
 
-        for client in self.clients:
-            try:
-                client.write_frame(frame)
-            except Exception as e:
-                log.warning('Failed to write frame to client: %s' % e)
+        try:
+            self.clients[-1].write_frame(self._format_frame(frame))
+        except Exception as e:
+            log.warning('Failed to write frame to client: %s' % e)
 
 
     def _fd_handler(self, fd, events):
@@ -560,6 +398,11 @@ class Camera(object):
 
     def add_client(self, client):
         log.info('Adding camera client: %d' % len(self.clients))
+
+        if len(self.clients):
+            self.clients[-1].write_frame(self.in_use_jpg)
+            self.clients[-1].write_frame(self.in_use_jpg)
+
         self.clients.append(client)
 
         if self.dev is None:
-- 
2.27.0