Upgrade GStreamer to 1.0

.travis.yml

@@ -0,0 +1,38 @@
+sudo: required
+dist: xenial
+
+language: python
+
+addons:
+  apt:
+    packages:
+      - gstreamer1.0-plugins-base
+      - gstreamer1.0-plugins-good
+      - gir1.2-gstreamer-1.0
+      - python-gst-1.0
+      - python3-gst-1.0
+      - python-redis
+      - python3-redis
+      - python-gobject
+      - python-gi
+
+services:
+  - redis-server
+
+python:
+  - 2.7
+  - 3.5
+
+virtualenv:
+  system_site_packages: true # Required as Travis runs python in a virtualenv, thus denying access to system GLib
+
+install:
+  - python setup.py install
+
+script:
+  - (openob 127.0.0.1 -v travis_1 travis tx 127.0.0.1 -a test 2>&1 | tee tx_log) &
+  - (tail -f -n0 tx_log &) | grep -q "Started mono audio transmission"
+  - (openob 127.0.0.1 -v travis_2 travis rx -a test 2>&1 | tee rx_log) &
+  - (tail -f -n0 rx_log &) | grep -q "Receiving mono audio transmission"
+  - sleep 10
+  - pkill openob

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 4.0.0-dev
+
+* Upgraded GStreamer libraries to ^1.0
+* Added Python 3 compatability
+
 ## 3.1
 
 * Improved command line interface (Jonty Sewell)

bin/openob

@@ -1,15 +1,13 @@
-#!/usr/bin/python
+#!/usr/bin/env python
+
 import sys
 import argparse
 import logging
-# Thanks gst for messing with argv
-argv = sys.argv
-sys.argv = []
+
 from openob.logger import LoggerFactory
 from openob.node import Node
 from openob.link_config import LinkConfig
 from openob.audio_interface import AudioInterface
-sys.argv = argv
 
 parser = argparse.ArgumentParser(prog='openob', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 parser.add_argument('-v', '--verbose', action='store_const', help='Increase logging verbosity', const=logging.DEBUG, default=logging.INFO)
@@ -21,7 +19,7 @@ subparsers = parser.add_subparsers(help="The link mode to operate in on this end
 
 parser_tx = subparsers.add_parser('tx', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 parser_tx.add_argument('receiver_host', type=str, help="The receiver for this transmitter. The machine at this address must be running an rx-mode Manager for this link name")
-parser_tx.add_argument('-a', '--audio_input', type=str, choices=['auto', 'alsa', 'jack'], default='auto', help="The audio source type for this end of the link")
+parser_tx.add_argument('-a', '--audio_input', type=str, choices=['auto', 'alsa', 'jack', 'test'], default='auto', help="The audio source type for this end of the link")
 parser_tx_alsa = parser_tx.add_argument_group('alsa', 'Options when using ALSA source type')
 parser_tx_alsa.add_argument('-d', '--alsa_device', type=str, default='hw:0', help="The ALSA device to connect to for input")
 parser_tx_jack = parser_tx.add_argument_group('jack', 'Options when using JACK source type')
@@ -45,7 +43,7 @@ parser_tx_opus.add_argument('--framesize', type=int, default=20, help="Opus fram
 parser_tx.set_defaults(mode='tx', fec=True, dtx=False, multicast=False)
 
 parser_rx = subparsers.add_parser('rx', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
-parser_rx.add_argument('-a', '--audio_output', type=str, choices=['auto', 'alsa', 'jack'], default='auto', help="The audio output type for this end of the link")
+parser_rx.add_argument('-a', '--audio_output', type=str, choices=['auto', 'alsa', 'jack', 'test'], default='auto', help="The audio output type for this end of the link")
 parser_rx_alsa = parser_rx.add_argument_group('alsa', 'Options when using ALSA output type')
 parser_rx_alsa.add_argument('-d', '--alsa_device', type=str, default='hw:0', help="The ALSA device to connect to for input")
 parser_rx_jack = parser_rx.add_argument_group('jack', 'Options when using JACK output type')

doc/source/conf.py

@@ -48,9 +48,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '3.0'
+version = '4.0'
 # The full version, including alpha/beta/rc tags.
-release = '3.0 alpha2'
+release = '4.0.0-dev'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

doc/source/index.rst

@@ -14,10 +14,6 @@ OpenOB can be used for:
 
 It can be used on a variety of network connections (including over the internet and mobile links such as 3G), with operating bitrates as low as 16kbps in compressed mode, and support for fully lossless operation in linear PCM mode.
 
-.. WARNING::
-  This is the documentation for the currently-unreleased/unstable OpenOB 3 refactoring. If you are using the 2.3 version from PyPi some documentation may be incorrect or misleading.
-
-
 Documentation Index
 ===================
 

doc/source/intro.rst

@@ -10,7 +10,7 @@ Architecture
 
 OpenOB is a peer to peer audio streaming system with a central configuration server.
 
-The program itself is a set of Python classes wrapping the PyGST bindings for the GStreamer media framework, which itself performs the audio encoding/decoding and transmission.
+The program itself is a set of Python classes wrapping the Python GObject bindings for the GStreamer media framework, which itself performs the audio encoding/decoding and transmission.
 
 An OpenOB *link* is comprised of a receiver and transmitter pair.
 
@@ -51,7 +51,7 @@ The following is a recommended set of specifications that are known to run OpenO
 - Dual-core Intel Atom, i3 or better @ 1.2GHz or better
 - 512MB RAM (2GB if you want a desktop environment)
 - 100Mbps NIC
-- Debian Wheezy (7.0)
+- Debian Jessie (8.0)
 
 OpenOB has been known to run on systems with significantly lower specifications.
 

doc/source/tutorial.rst

@@ -17,25 +17,27 @@ OpenOB relies on the GStreamer media framework for the underlying audio transpor
 
 Additionally, OpenOB needs some Python extensions, and on the configuration server, we must also install the Redis server used for configuration management.
 
-On Debian you can install the prerequisites with the following command:
+On Debian Stretch / Ubuntu Xenial you can install the prerequisites with the following command:
 
 .. code-block:: bash
 
-  sudo apt-get install python-gst0.10 python-setuptools gstreamer0.10-plugins-base gstreamer0.10-plugins-bad gstreamer0.10-plugins-good gstreamer0.10-plugins-ugly gstreamer0.10-tools python-gobject python-gobject-2 gstreamer0.10-alsa python-argparse python-redis
+  sudo apt install gstreamer1.0-plugins-base gstreamer1.0-plugins-good gir1.2-gstreamer-1.0 python-gst-1.0 python-redis python-gi python-setuptools
 
-This should also work on Ubuntu. Your GStreamer implementation must be recent enough to support Opus; this is supported in Ubuntu 13.04 and Debian Wheezy or newer. In order to ensure compatibility, it is recommended that both ends of the link use the same version of GStreamer, which is most easily achieved by running the same operating system version on each end and installing the distribution's packages as detailed above.
+If you wish to use Python 3, you must install `python3-redis`, `python3-gst-1.0` and `python3-setuptools` instead of the Python 2 equivalents.
+The GStreamer Opus plugin has graduated from the 'bad' plugins repository to the 'base' repository as of 2015.  Older distributions may require the `gstreamer1.0-plugins-bad` package installed.
+In order to ensure compatibility, it is recommended that both ends of the link use the same version of GStreamer, which is most easily achieved by running the same operating system version on each end and installing the distribution's packages as detailed above.
 
 On one machine, which for this tutorial we'll assume is also our receiver, we'll install Redis:
 
 .. code-block:: bash
 
-  [user@rx-host] $ sudo apt-get install redis-server
+  [user@rx-host] $ sudo apt install redis-server
 
 We also need to make sure Redis binds itself to be accessible to remote machines, not just localhost. You can edit ``/etc/redis/redis.conf`` yourself or run the following to instantly make this adjustment
 
 .. code-block:: bash
 
-  [user@rx-host] $ sudo sed -i.bak ‘s/bind 127.*/bind 0.0.0.0/’ /etc/redis/redis.conf && sudo service redis restart
+  [user@rx-host] $ sudo sed -i.bak ‘s/bind 127.*/bind 0.0.0.0/’ /etc/redis/redis.conf && sudo service redis-server restart
 
 Installing OpenOB
 -----------------
@@ -44,7 +46,7 @@ Now we can install OpenOB itself. You can install from git for the bleeding edge
 
 .. code-block:: bash
 
-  sudo easy_install OpenOB
+  sudo pip install OpenOB
 
 Networking
 ----------

openob/link_config.py

@@ -27,7 +27,7 @@ def __init__(self, link_name, redis_host):
         self.redis = None
         while True:
             try:
-                self.redis = redis.StrictRedis(self.redis_host)
+                self.redis = redis.StrictRedis(host=self.redis_host, charset="utf-8", decode_responses=True)
                 break
             except Exception as e:
                 self.logger.error(

openob/node.py

@@ -4,8 +4,6 @@
 from openob.rtp.tx import RTPTransmitter
 from openob.rtp.rx import RTPReceiver
 from openob.link_config import LinkConfig
-from gst import ElementNotFoundError
-
 
 class Node(object):
 
@@ -50,9 +48,6 @@ def run_link(self, link_config, audio_interface):
                         link_logger.debug("Got caps from transmitter, setting config")
                         link_config.set("caps", caps)
                         transmitter.loop()
-                    except ElementNotFoundError as e:
-                        link_logger.critical("GStreamer element missing: %s - will now exit" % e)
-                        sys.exit(1)
                     except Exception as e:
                         link_logger.exception("Transmitter crashed for some reason! Restarting...")
                         time.sleep(0.5)
@@ -65,9 +60,6 @@ def run_link(self, link_config, audio_interface):
                         receiver = RTPReceiver(self.node_name, link_config, audio_interface)
                         receiver.run()
                         receiver.loop()
-                    except ElementNotFoundError as e:
-                        link_logger.critical("GStreamer element missing: %s - will now exit" % e)
-                        sys.exit(1)
                     except Exception as e:
                         link_logger.exception("Receiver crashed for some reason! Restarting...")
                         time.sleep(0.1)