merged trondeau/digital-wip2 r4193:4730 into trunk - improves digital receiver and fixes ticket:72

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4731 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 149 insertions, 0 deletions

diff --git a/gnuradio-examples/python/hier/digital/tx_voice.py b/gnuradio-examples/python/hier/digital/tx_voice.py
new file mode 100755
index 000000000..eba0c3c71
--- /dev/null
+++ b/gnuradio-examples/python/hier/digital/tx_voice.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python
+#
+# Copyright 2005,2006 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio 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 2, or (at your option)
+# any later version.
+# 
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+from gnuradio import gr, gru, modulation_utils
+from gnuradio import usrp
+from gnuradio import audio
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+from gnuradio.vocoder import gsm_full_rate
+
+import random
+import time
+import struct
+import sys
+
+# from current dir
+from transmit_path import transmit_path
+import fusb_options
+
+#import os
+#print os.getpid()
+#raw_input('Attach and press enter')
+
+
+class audio_rx(gr.hier_block):
+    def __init__(self, fg, audio_input_dev):
+        sample_rate = 8000
+        src = audio.source(sample_rate, audio_input_dev)
+        src_scale = gr.multiply_const_ff(32767)
+        f2s = gr.float_to_short()
+        voice_coder = gsm_full_rate.encode_sp()
+        self.packets_from_encoder = gr.msg_queue()
+        packet_sink = gr.message_sink(33, self.packets_from_encoder, False)
+        fg.connect(src, src_scale, f2s, voice_coder, packet_sink)
+        gr.hier_block.__init__(self, fg, src, packet_sink)
+
+    def get_encoded_voice_packet(self):
+        return self.packets_from_encoder.delete_head()
+        
+
+class my_graph(gr.flow_graph):
+
+    def __init__(self, modulator_class, options):
+        gr.flow_graph.__init__(self)
+        self.txpath = transmit_path(self, modulator_class, options)
+        self.audio_rx = audio_rx(self, options.audio_input)
+
+
+
+# /////////////////////////////////////////////////////////////////////////////
+#                                   main
+# /////////////////////////////////////////////////////////////////////////////
+
+def main():
+
+    def send_pkt(payload='', eof=False):
+        return fg.txpath.send_pkt(payload, eof)
+
+    def rx_callback(ok, payload):
+        print "ok = %r, payload = '%s'" % (ok, payload)
+
+    mods = modulation_utils.type_1_mods()
+
+    parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
+    expert_grp = parser.add_option_group("Expert")
+
+    parser.add_option("-m", "--modulation", type="choice", choices=mods.keys(),
+                      default='gmsk',
+                      help="Select modulation from: %s [default=%%default]"
+                            % (', '.join(mods.keys()),))
+    parser.add_option("-M", "--megabytes", type="eng_float", default=0,
+                      help="set megabytes to transmit [default=inf]")
+    parser.add_option("-I", "--audio-input", type="string", default="",
+                      help="pcm input device name.  E.g., hw:0,0 or /dev/dsp")
+
+    transmit_path.add_options(parser, expert_grp)
+
+    for mod in mods.values():
+        mod.add_options(expert_grp)
+
+    fusb_options.add_options(expert_grp)
+
+    parser.set_defaults(bitrate=50e3)  # override default bitrate default
+    (options, args) = parser.parse_args ()
+
+    if len(args) != 0:
+        parser.print_help()
+        sys.exit(1)
+
+    if options.tx_freq is None:
+        sys.stderr.write("You must specify -f FREQ or --freq FREQ\n")
+        parser.print_help(sys.stderr)
+        sys.exit(1)
+
+
+    # build the graph
+    fg = my_graph(mods[options.modulation], options)
+
+    r = gr.enable_realtime_scheduling()
+    if r != gr.RT_OK:
+        print "Warning: failed to enable realtime scheduling"
+
+
+    fg.start()                       # start flow graph
+
+    # generate and send packets
+    nbytes = int(1e6 * options.megabytes)
+    n = 0
+    pktno = 0
+
+    while nbytes == 0 or n < nbytes:
+        packet = fg.audio_rx.get_encoded_voice_packet()
+        s = packet.to_string()
+        send_pkt(s)
+        n += len(s)
+        sys.stderr.write('.')
+        pktno += 1
+        
+    send_pkt(eof=True)
+    fg.wait()                       # wait for it to finish
+    fg.txpath.set_auto_tr(False)
+
+
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        pass