add unified modem script

scripts/modem.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info.major == 2:
+    _stdin = sys.stdin
+    _stdout = sys.stdout
+else:
+    _stdin = sys.stdin.buffer
+    _stdout = sys.stdout.buffer
+import logging
+logging.basicConfig(level=logging.DEBUG,
+                    format='%(asctime)s %(levelname)-12s %(message)s')
+
+import amodem.recv
+import amodem.send
+
+import argparse
+p = argparse.ArgumentParser()
+p.add_argument('-i', '--input',
+               type=argparse.FileType('rb'),
+               default=_stdin)
+p.add_argument('-o', '--output',
+               type=argparse.FileType('wb'),
+               default=_stdout)
+
+sub = p.add_subparsers()
+
+send = sub.add_parser('send')
+send.add_argument('--silence-start', type=float, default=1.0)
+send.add_argument('--silence-stop', type=float, default=1.0)
+send.set_defaults(func=amodem.send.main)
+
+recv = sub.add_parser('recv')
+recv.add_argument('--skip', type=int, default=128,
+                  help='skip initial N samples, due to spurious spikes')
+recv.add_argument('--plot', dest='plt', action='store_true', default=False,
+                  help='plot results using pylab module')
+recv.set_defaults(func=amodem.recv.main)
+
+args = p.parse_args()
+args.func(args)