gnuradio-examples, gr-audio: moved audio Python and C++ examples into gr-audio

This begins a transition of examples from a separate gnuradio-examples component
into an examples directory with the component they go with.  In this commit:

gnuradio-examples/c++/audio/   => gr-audio/examples/c++
gnuradio-examples/python/audio => gr-audio/examples/python

The system installation directory remains $PREFIX/share/gnuradio/examples/audio

1 files changed, 138 insertions, 0 deletions

diff --git a/gr-audio/examples/python/audio_fft.py b/gr-audio/examples/python/audio_fft.py
new file mode 100755
index 000000000..960e0f94d
--- /dev/null
+++ b/gr-audio/examples/python/audio_fft.py
@@ -0,0 +1,138 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005,2007 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, gru, audio
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from gnuradio.wxgui import stdgui2, fftsink2, waterfallsink2, scopesink2, form, slider
+from optparse import OptionParser
+import wx
+import sys
+
+class app_top_block(stdgui2.std_top_block):
+    def __init__(self, frame, panel, vbox, argv):
+        stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
+
+        self.frame = frame
+        self.panel = panel
+        
+        parser = OptionParser(option_class=eng_option)
+        parser.add_option("-W", "--waterfall", action="store_true", default=False,
+                          help="Enable waterfall display")
+        parser.add_option("-S", "--oscilloscope", action="store_true", default=False,
+                          help="Enable oscilloscope display")
+        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("-r", "--sample-rate", type="eng_float", default=48000,
+                          help="set sample rate to RATE (48000)")
+
+        (options, args) = parser.parse_args()   
+	sample_rate = int(options.sample_rate)
+        
+	if len(args) != 0:
+            parser.print_help()
+            sys.exit(1)
+
+        self.show_debug_info = True
+        
+        # build the graph
+        if options.waterfall:
+            self.scope = \
+              waterfallsink2.waterfall_sink_f (panel, fft_size=1024, sample_rate=sample_rate)
+        elif options.oscilloscope:
+            self.scope = scopesink2.scope_sink_f(panel, sample_rate=sample_rate)
+        else:
+            self.scope = fftsink2.fft_sink_f (panel, fft_size=1024, sample_rate=sample_rate, fft_rate=30,
+					      ref_scale=1.0, ref_level=0, y_divs=12)
+
+	self.src = audio.source (sample_rate, options.audio_input)
+
+        self.connect(self.src, self.scope)
+
+        self._build_gui(vbox)
+
+        # set initial values
+
+    def _set_status_msg(self, msg):
+        self.frame.GetStatusBar().SetStatusText(msg, 0)
+
+    def _build_gui(self, vbox):
+
+        def _form_set_freq(kv):
+            return self.set_freq(kv['freq'])
+            
+        vbox.Add(self.scope.win, 10, wx.EXPAND)
+        
+	#self._build_subpanel(vbox)
+
+    def _build_subpanel(self, vbox_arg):
+        # build a secondary information panel (sometimes hidden)
+
+        # FIXME figure out how to have this be a subpanel that is always
+        # created, but has its visibility controlled by foo.Show(True/False)
+        
+        def _form_set_decim(kv):
+            return self.set_decim(kv['decim'])
+
+        if not(self.show_debug_info):
+            return
+
+        panel = self.panel
+        vbox = vbox_arg
+        myform = self.myform
+
+        #panel = wx.Panel(self.panel, -1)
+        #vbox = wx.BoxSizer(wx.VERTICAL)
+
+        hbox = wx.BoxSizer(wx.HORIZONTAL)
+        hbox.Add((5,0), 0)
+
+        myform['decim'] = form.int_field(
+            parent=panel, sizer=hbox, label="Decim",
+            callback=myform.check_input_and_call(_form_set_decim, self._set_status_msg))
+
+        hbox.Add((5,0), 1)
+        myform['fs@usb'] = form.static_float_field(
+            parent=panel, sizer=hbox, label="Fs@USB")
+
+        hbox.Add((5,0), 1)
+        myform['dbname'] = form.static_text_field(
+            parent=panel, sizer=hbox)
+
+        hbox.Add((5,0), 1)
+        myform['baseband'] = form.static_float_field(
+            parent=panel, sizer=hbox, label="Analog BB")
+
+        hbox.Add((5,0), 1)
+        myform['ddc'] = form.static_float_field(
+            parent=panel, sizer=hbox, label="DDC")
+
+        hbox.Add((5,0), 0)
+        vbox.Add(hbox, 0, wx.EXPAND)
+
+        
+def main ():
+    app = stdgui2.stdapp(app_top_block, "Audio FFT", nstatus=1)
+    app.MainLoop()
+
+if __name__ == '__main__':
+    main ()