dmt

commit 94b9549f46cc6c7728b51c6f22e9a6e1a31d15a1
parent 4ac934837cf0043f9801867dc248265112fa7cee
Author: parazyd <parazyd@dyne.org>
Date:   Fri, 17 Nov 2017 22:28:51 +0100

add the http listener daemon

Diffstat:
A
http-api/README.md
 | 
26
++++++++++++++++++++++++++
A
http-api/config.py
 | 
17
+++++++++++++++++
A
http-api/http_listener.py
 | 
50
++++++++++++++++++++++++++++++++++++++++++++++++++

3 files changed, 93 insertions(+), 0 deletions(-)
diff --git a/http-api/README.md b/http-api/README.md
@@ -0,0 +1,26 @@
+http-listener
+=============
+
+http-listener is a small Flask daemon acting as a HTTP API listening for
+callbacks from the FreePBX log handler.
+
+It offers callbacks for `/callanswered` and `/callended`.
+
+The former will mute the playback of our sound input on the speakers and
+enable it on the phone.
+
+The latter will do the opposite.
+
+
+Dependencies
+------------
+
+```
+python3-flask
+```
+
+
+Deployment
+----------
+
+Deploy this by running `./http_listener.py` on the Caller Station.
diff --git a/http-api/config.py b/http-api/config.py
@@ -0,0 +1,17 @@
+# See LICENSE file for copyright and license details.
+"""
+HTTP API handler configuration
+"""
+
+# We are using the following USB sound card:
+# input: GeneralPlus USB Audio Device as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.3/0003:1B3F:2008.0003/input/input17
+# hid-generic 0003:1B3F:2008.0003: input,hidraw0: USB HID v2.01 Device [GeneralPlus USB Audio Device] on usb-0000:00:1a.0-1.2/input3
+
+# Card number (found in ALSA)
+cardno = '1'
+
+# Mic capture line (for amixer)
+mic_cap = "numid=4,iface=MIXER,name='Mic Playback Volume'"
+
+# Mic playback line (for amixer)
+mic_play = "numid=8,iface=MIXER,name='Mic Capture Volume'"
diff --git a/http-api/http_listener.py b/http-api/http_listener.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+# See LICENSE file for copyright and license details.
+"""
+HTTP API handler for the Caller Station
+"""
+
+from subprocess import Popen
+from flask import Flask
+
+from config import (cardno, mic_cap, mic_play)
+
+APP = Flask(__name__)
+
+
+@APP.route('/')
+def main():
+    """
+    Main routine (noop)
+    """
+    return '\n'
+
+
+@APP.route('/callanswered')
+def callanswered():
+    """
+    Handler for the answered phone call.
+    """
+    print('Call answered')
+
+    Popen(['amixer', '-c', cardno, 'cset', mic_play, '0'])
+    Popen(['amixer', '-c', cardno, 'cset', mic_cap, '100'])
+
+    return 'Call answered\n'
+
+
+@APP.route('/callended')
+def callended():
+    """
+    Handler for the ended phone call.
+    """
+    print('Call ended')
+
+    Popen(['amixer', '-c', cardno, 'cset', mic_play, '100'])
+    Popen(['amixer', '-c', cardno, 'cset', mic_cap, '0'])
+
+    return 'Call ended\n'
+
+
+if __name__ == '__main__':
+    APP.run(host='0.0.0.0', port=8000, threaded=True, debug=True)