From fb7b1484548138e10aeac4051506ec58731c3362 Mon Sep 17 00:00:00 2001
From: max <max@65a5c917-d112-43f1-993d-58c26a4786be>
Date: Tue, 26 Feb 2013 03:36:13 +0000
Subject: [PATCH] app_rpt soundcard p25 tx

git-svn-id: http://op25.osmocom.org/svn/trunk@309 65a5c917-d112-43f1-993d-58c26a4786be
---
 repeater/src/python/soundcard_tx.py | 118 ++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100755 repeater/src/python/soundcard_tx.py

diff --git a/repeater/src/python/soundcard_tx.py b/repeater/src/python/soundcard_tx.py
new file mode 100755
index 0000000..195db16
--- /dev/null
+++ b/repeater/src/python/soundcard_tx.py
@@ -0,0 +1,118 @@
+#!/usr/bin/env python
+#
+# Copyright 2005,2006,2007 Free Software Foundation, Inc.
+# 
+# GNU Radio Multichannel APCO P25 Tx (c) Copyright 2009-2013 KA1RBI
+# 
+# This file is part of GNU Radio and part of OP25
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# It is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+"""
+Transmit 1 narrow band P25 signal using soundcard TX
+
+"""
+
+from gnuradio import gr, eng_notation, repeater
+from gnuradio import audio
+from gnuradio import blks2
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import math
+import sys
+import os
+
+from gnuradio.wxgui import stdgui2, scopesink2
+import wx
+
+class tx_channel_soundcard(gr.hier_block2):
+    def __init__(self, port, gain, soundcard_rate):
+        gr.hier_block2.__init__(self, "tx_channel_soundcard",
+                                gr.io_signature(0, 0, 0),
+                                gr.io_signature(1, 1, gr.sizeof_float))
+
+        msg_queue = gr.msg_queue(2)
+        do_imbe = 1
+        do_float = 1
+        do_complex = 0
+        if soundcard_rate == 96000:
+		decim = 1
+	else:
+		decim = 2	# for 48000
+        # per-channel GR source block including these steps:
+        # - receive audio chunks from asterisk via UDP
+        # - imbe encode
+        # - generate float output stream (table lookup method)
+        # - generates zero power while no input received
+        self.chan = repeater.chan_usrp(port, do_imbe, do_complex, do_float, 1.0, decim, msg_queue)
+        self.amp = gr.multiply_const_ff(gain)
+
+        self.connect (self.chan, self.amp, self)
+
+class fm_tx_block(stdgui2.std_top_block):
+    def __init__(self, frame, panel, vbox, argv):
+        MAX_CHANNELS = 1
+        stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv)
+
+        parser = OptionParser (option_class=eng_option)
+        parser.add_option("-A", "--audio-output", type="string", default="")
+        parser.add_option("-d","--debug", action="store_true", default=False)
+        parser.add_option("-e","--enable-scope", action="store_true", default=False,
+                          help="enable c4fm scope")
+        parser.add_option("-g", "--gain", type="eng_float", default=1.0,
+                          help="output gain (default: %default)")
+        parser.add_option("-p", "--udp-port", type="int", default=32001,
+                           help="UDP port number")
+        parser.add_option("-s", "--output-sample-rate", type="int", default=48000,
+                           help="soundcard output sampling rate")
+        (options, args) = parser.parse_args ()
+
+        if len(args) != 0:
+            parser.print_help()
+            sys.exit(1)
+
+        # ----------------------------------------------------------------
+        # Set up constants and parameters
+
+        self.soundcard = audio.sink(options.output_sample_rate, options.audio_output)
+
+        # Instantiate TX channel
+        t = tx_channel_soundcard(options.udp_port, options.gain, options.output_sample_rate)
+        self.connect (t, self.soundcard)
+
+        # plot an FFT to verify we are sending what we want
+        if options.enable_scope:
+            post_mod = scopesink2.scope_sink_f(panel, title="C4FM Scope",
+                                           fft_size=512, sample_rate=options.output_sample_rate,
+                                           v_scale=5, t_scale=0.001)
+            self.connect (t, post_mod)
+            vbox.Add (post_mod.win, 1, wx.EXPAND)
+
+        if options.debug:
+        #    self.debugger = tx_debug_gui.tx_debug_gui(self.subdev)
+        #    self.debugger.Show(True)
+          print "attach pid %d" % os.getpid()
+          raw_input("press enter")
+
+
+def main ():
+    sys.stderr.write("GNU Radio Multichannel APCO P25 Tx (c) Copyright 2009-2013 KA1RBI\n")
+    app = stdgui2.stdapp(fm_tx_block, "Multichannel APCO P25 Tx", nstatus=1)
+    app.MainLoop ()
+
+if __name__ == '__main__':
+    main ()