Capture from Discriminator Tap

git-svn-id: http://op25.osmocom.org/svn/trunk@159 65a5c917-d112-43f1-993d-58c26a4786be

python/audio_capture.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2007 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 3, 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
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+class my_top_block(gr.top_block):
+
+    def __init__(self):
+        gr.top_block.__init__(self)
+
+        usage="%prog: [options] output_filename"
+        parser = OptionParser(option_class=eng_option, usage=usage)
+        parser.add_option("-I", "--audio-input", type="string", default="",
+                          help="pcm input device name.  E.g., hw:0,0 or /dev/dsp")
+        parser.add_option("-s", "--sample-rate", type="eng_float", default=48000,
+                          help="set sample rate to RATE (48000)")
+        parser.add_option("-N", "--nsamples", type="eng_float", default=None,
+                          help="number of samples to collect [default=+inf]")
+     
+        (options, args) = parser.parse_args ()
+        if len(args) != 2:
+            parser.print_help()
+            raise SystemExit, 1
+        filename = args[0]
+        filename2 = args[1]
+
+        sample_rate = int(options.sample_rate)
+        src = audio.source (sample_rate, options.audio_input)
+        dst  = gr.file_sink (gr.sizeof_float, filename)
+        dst2 = gr.file_sink (gr.sizeof_float, filename2)
+
+        if options.nsamples is None:
+            self.connect((src, 0), dst)
+            self.connect((src, 1), dst2)
+        else:
+            head = gr.head(gr.sizeof_float, int(options.nsamples))
+            head2 = gr.head(gr.sizeof_float, int(options.nsamples))
+            self.connect((src, 0), head, dst)
+            self.connect((src, 1), head2, dst2)
+
+
+if __name__ == '__main__':
+    try:
+        my_top_block().run()
+    except KeyboardInterrupt:
+        pass