From 5d69a524f81f234b3fbc41d49ba18d6f6886baba Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 3 Aug 2006 04:51:51 +0000
Subject: Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/audio/Makefile.am | 32 ++++++++
gnuradio-examples/python/audio/audio_copy.py | 64 +++++++++++++++
gnuradio-examples/python/audio/audio_play.py | 57 ++++++++++++++
gnuradio-examples/python/audio/audio_to_file.py | 63 +++++++++++++++
gnuradio-examples/python/audio/dial_squelch.py | 89 +++++++++++++++++++++
gnuradio-examples/python/audio/dial_tone.py | 57 ++++++++++++++
gnuradio-examples/python/audio/dialtone_v.py | 71 +++++++++++++++++
gnuradio-examples/python/audio/mono_tone.py | 66 ++++++++++++++++
gnuradio-examples/python/audio/multi_tone.py | 90 ++++++++++++++++++++++
.../python/audio/spectrum_inversion.py | 48 ++++++++++++
gnuradio-examples/python/audio/test_resampler.py | 66 ++++++++++++++++
11 files changed, 703 insertions(+)
create mode 100644 gnuradio-examples/python/audio/Makefile.am
create mode 100755 gnuradio-examples/python/audio/audio_copy.py
create mode 100755 gnuradio-examples/python/audio/audio_play.py
create mode 100755 gnuradio-examples/python/audio/audio_to_file.py
create mode 100755 gnuradio-examples/python/audio/dial_squelch.py
create mode 100755 gnuradio-examples/python/audio/dial_tone.py
create mode 100755 gnuradio-examples/python/audio/dialtone_v.py
create mode 100755 gnuradio-examples/python/audio/mono_tone.py
create mode 100755 gnuradio-examples/python/audio/multi_tone.py
create mode 100755 gnuradio-examples/python/audio/spectrum_inversion.py
create mode 100755 gnuradio-examples/python/audio/test_resampler.py
(limited to 'gnuradio-examples/python/audio')
diff --git a/gnuradio-examples/python/audio/Makefile.am b/gnuradio-examples/python/audio/Makefile.am
new file mode 100644
index 0000000000..27cea62a31
--- /dev/null
+++ b/gnuradio-examples/python/audio/Makefile.am
@@ -0,0 +1,32 @@
+#
+# Copyright 2004 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+EXTRA_DIST = \
+ audio_copy.py \
+ audio_play.py \
+ audio_to_file.py \
+ dial_tone.py \
+ mono_tone.py \
+ multi_tone.py \
+ spectrum_inversion.py \
+ test_resampler.py
+
+
diff --git a/gnuradio-examples/python/audio/audio_copy.py b/gnuradio-examples/python/audio/audio_copy.py
new file mode 100755
index 0000000000..56fa836d29
--- /dev/null
+++ b/gnuradio-examples/python/audio/audio_copy.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ 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("-O", "--audio-output", type="string", default="",
+ help="pcm output 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 ()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ sample_rate = int(options.sample_rate)
+ src = audio.source (sample_rate, options.audio_input)
+ dst = audio.sink (sample_rate, options.audio_output)
+
+ # Determine the maximum number of outputs on the source and
+ # maximum number of inputs on the sink, then connect together
+ # the most channels we can without overlap
+ nchan = min (src.output_signature().max_streams(),
+ dst.input_signature().max_streams())
+
+ for i in range (nchan):
+ self.connect ((src, i), (dst, i))
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
+
diff --git a/gnuradio-examples/python/audio/audio_play.py b/gnuradio-examples/python/audio/audio_play.py
new file mode 100755
index 0000000000..e70b0f942d
--- /dev/null
+++ b/gnuradio-examples/python/audio/audio_play.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ parser.add_option("-F", "--filename", type="string", default="audio.dat",
+ help="read input from FILE")
+ parser.add_option("-r", "--sample-rate", type="eng_float", default=48000,
+ help="set sample rate to RATE (48000)")
+ parser.add_option("-R", "--repeat", action="store_true", default=False)
+ parser.add_option("-O", "--audio-output", type="string", default="",
+ help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
+ (options, args) = parser.parse_args()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ sample_rate = int(options.sample_rate)
+ src = gr.file_source (gr.sizeof_float, options.filename, options.repeat)
+ dst = audio.sink (sample_rate, options.audio_output)
+ self.connect(src, dst)
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/audio_to_file.py b/gnuradio-examples/python/audio/audio_to_file.py
new file mode 100755
index 0000000000..74e1ea7ac3
--- /dev/null
+++ b/gnuradio-examples/python/audio/audio_to_file.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+#
+# Copyright 2004 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__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("-r", "--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) != 1:
+ parser.print_help()
+ raise SystemExit, 1
+ filename = args[0]
+
+ sample_rate = int(options.sample_rate)
+ src = audio.source (sample_rate, options.audio_input)
+ dst = gr.file_sink (gr.sizeof_float, filename)
+
+ if options.nsamples is None:
+ self.connect((src, 0), dst)
+ else:
+ head = gr.head(gr.sizeof_float, int(options.nsamples))
+ self.connect((src, 0), head, dst)
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/dial_squelch.py b/gnuradio-examples/python/audio/dial_squelch.py
new file mode 100755
index 0000000000..d947e58604
--- /dev/null
+++ b/gnuradio-examples/python/audio/dial_squelch.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+
+# Copyright 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr, audio, eng_option
+from gnuradio.eng_option import eng_option
+from math import pi, cos
+from optparse import OptionParser
+
+"""
+This script generates a standard dial tone and then applies a sinusoidal
+envelope to vary it's loudness. The audio is then passed through the
+power squelch block before it gets sent to the sound card. By varying
+the command line parameters, one can see the effect of differing
+amounts of power averaging, threshold, and attack/decay ramping.
+"""
+
+class app_flow_graph(gr.flow_graph):
+ def __init__(self, options, args):
+ gr.flow_graph.__init__(self)
+
+ # Create dial tone by adding two sine waves
+ SRC1 = gr.sig_source_f(options.rate, gr.GR_SIN_WAVE, 350, 0.5, 0.0)
+ SRC2 = gr.sig_source_f(options.rate, gr.GR_SIN_WAVE, 440, 0.5, 0.0)
+ ADD = gr.add_ff()
+
+ # Convert to vector stream (and back) to apply raised cosine envelope
+ # You could also do this with a vector_source_f block that repeats.
+ S2V = gr.stream_to_vector(gr.sizeof_float, options.rate)
+ ENV = [0.5-cos(2*pi*x/options.rate)/2 for x in range(options.rate)]
+ MLT = gr.multiply_const_vff(ENV)
+ V2S = gr.vector_to_stream(gr.sizeof_float, options.rate)
+
+ # Run through power squelch with user supplied or default options
+ # Zero output when squelch is invoked
+ SQL = gr.pwr_squelch_ff(options.threshold, options.alpha, options.ramp, False)
+ DST = audio.sink(options.rate)
+
+ # Solder it all together
+ self.connect(SRC1, (ADD, 0))
+ self.connect(SRC2, (ADD, 1))
+ self.connect(ADD, S2V, MLT, V2S, SQL, DST)
+
+def main():
+ parser = OptionParser(option_class=eng_option)
+ parser.add_option("-r", "--rate", type="int", default=8000, help="set audio output sample rate to RATE", metavar="RATE")
+ parser.add_option("-t", "--threshold", type="eng_float", default=-10.0, help="set power squelch to DB", metavar="DB")
+ parser.add_option("-a", "--alpha", type="eng_float", default=None, help="set alpha to ALPHA", metavar="ALPHA")
+ parser.add_option("-m", "--ramp", type="int", default=None, help="set attack/decay ramp to SAMPLES", metavar="SAMPLES")
+ (options, args) = parser.parse_args()
+
+ if options.alpha == None:
+ options.alpha = 50.0/options.rate
+
+ if options.ramp == None:
+ options.ramp = options.rate/50 # ~ 20 ms
+
+ print "Using audio rate of", options.rate
+ print "Using threshold of", options.threshold, "db"
+ print "Using alpha of", options.alpha
+ print "Using ramp of", options.ramp, "samples"
+
+ fg = app_flow_graph(options, args)
+
+ try:
+ fg.run()
+ except KeyboardInterrupt:
+ pass
+
+if __name__ == "__main__":
+ main()
diff --git a/gnuradio-examples/python/audio/dial_tone.py b/gnuradio-examples/python/audio/dial_tone.py
new file mode 100755
index 0000000000..3ce84eb596
--- /dev/null
+++ b/gnuradio-examples/python/audio/dial_tone.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ parser.add_option("-O", "--audio-output", type="string", default="",
+ help="pcm output 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 ()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ sample_rate = int(options.sample_rate)
+ ampl = 0.1
+
+ src0 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, ampl)
+ src1 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, ampl)
+ dst = audio.sink (sample_rate, options.audio_output)
+ self.connect (src0, (dst, 0))
+ self.connect (src1, (dst, 1))
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/dialtone_v.py b/gnuradio-examples/python/audio/dialtone_v.py
new file mode 100755
index 0000000000..e704414a9e
--- /dev/null
+++ b/gnuradio-examples/python/audio/dialtone_v.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python
+
+# Copyright 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr, audio
+from math import pi, sin
+
+"""
+This test script demonstrates the use of element-wise vector processing
+vs. stream processing. The example is artificial in that the stream
+version in dial_tone.py is the normal way to do it; in addition, the
+envelope processing here is just for demo purposes and isn't needed.
+"""
+
+# For testing different buffer sizes
+rate = 48000
+
+fg = gr.flow_graph()
+
+# Two streams of floats
+a = gr.sig_source_f(rate, gr.GR_SIN_WAVE, 350, 0.5, 0.0);
+b = gr.sig_source_f(rate, gr.GR_SIN_WAVE, 440, 0.5, 0.0);
+
+# Turn them into vectors of length 'size'
+av = gr.stream_to_vector(gr.sizeof_float, rate)
+bv = gr.stream_to_vector(gr.sizeof_float, rate)
+
+# Make a vector adder for float vectors
+adder = gr.add_vff(rate)
+
+# Make a 1 Hz sine envelope
+envelope = [sin(2*pi*x/rate)*0.5 for x in range(rate)]
+multiplier = gr.multiply_const_vff(envelope)
+
+# Make an offset adder
+offset = gr.add_const_vff((0.5,)*rate)
+
+# Turn the vector back into a stream of floats
+result = gr.vector_to_stream(gr.sizeof_float, rate)
+
+# Play it
+sink = audio.sink(rate)
+
+fg.connect(a, av)
+fg.connect(b, bv)
+fg.connect(av, (adder, 0))
+fg.connect(bv, (adder, 1))
+fg.connect(adder, multiplier, offset, result, sink)
+
+try:
+ fg.run()
+except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/mono_tone.py b/gnuradio-examples/python/audio/mono_tone.py
new file mode 100755
index 0000000000..84c3b542ee
--- /dev/null
+++ b/gnuradio-examples/python/audio/mono_tone.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+#import os
+#print os.getpid()
+#raw_input('Attach gdb and press Enter: ')
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ parser.add_option("-O", "--audio-output", type="string", default="",
+ help="pcm output 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)")
+ parser.add_option("-D", "--dont-block", action="store_false", default=True,
+ dest="ok_to_block")
+
+ (options, args) = parser.parse_args ()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ sample_rate = int(options.sample_rate)
+ ampl = 0.1
+
+ src0 = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 650, ampl)
+
+ dst = audio.sink (sample_rate,
+ options.audio_output,
+ options.ok_to_block)
+
+ self.connect (src0, (dst, 0))
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/multi_tone.py b/gnuradio-examples/python/audio/multi_tone.py
new file mode 100755
index 0000000000..c6f83050e2
--- /dev/null
+++ b/gnuradio-examples/python/audio/multi_tone.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2006 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+#import os
+#print os.getpid()
+#raw_input('Attach gdb and press Enter: ')
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ parser.add_option("-O", "--audio-output", type="string", default="",
+ help="pcm output 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)")
+ parser.add_option ("-m", "--max-channels", type="int", default="16",
+ help="set maximum channels to use")
+ parser.add_option("-D", "--dont-block", action="store_false", default=True,
+ dest="ok_to_block")
+ (options, args) = parser.parse_args ()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ sample_rate = int(options.sample_rate)
+ limit_channels = options.max_channels
+
+ ampl = 0.1
+
+ # With a tip of the hat to Harry Partch, may he R.I.P.
+ # See "Genesis of a Music". He was into some very wild tunings...
+ base = 392
+ ratios = { 1 : 1.0,
+ 3 : 3.0/2,
+ 5 : 5.0/4,
+ 7 : 7.0/4,
+ 9 : 9.0/8,
+ 11 : 11.0/8 }
+
+ # progression = (1, 5, 3, 7)
+ # progression = (1, 9, 3, 7)
+ # progression = (3, 7, 9, 11)
+ # progression = (7, 11, 1, 5)
+ progression = (7, 11, 1, 5, 9)
+
+ dst = audio.sink (sample_rate,
+ options.audio_output,
+ options.ok_to_block)
+
+ max_chan = dst.input_signature().max_streams()
+ if (max_chan == -1) or (max_chan > limit_channels):
+ max_chan = limit_channels
+
+ for i in range (max_chan):
+ quo, rem = divmod (i, len (progression))
+ freq = base * ratios[progression[rem]] * (quo + 1)
+ src = gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, freq, ampl)
+ self.connect (src, (dst, i))
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/spectrum_inversion.py b/gnuradio-examples/python/audio/spectrum_inversion.py
new file mode 100755
index 0000000000..9bb87aa4b1
--- /dev/null
+++ b/gnuradio-examples/python/audio/spectrum_inversion.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+#
+# Gang - Here's a simple script that demonstrates spectrum inversion
+# using the multiply by [1,-1] method (mixing with Nyquist frequency).
+# Requires nothing but a sound card, and sounds just like listening
+# to a SSB signal on the wrong sideband.
+#
+
+from gnuradio import gr
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ 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("-O", "--audio-output", type="string", default="",
+ help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
+ parser.add_option("-r", "--sample-rate", type="eng_float", default=8000,
+ help="set sample rate to RATE (8000)")
+ (options, args) = parser.parse_args ()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ sample_rate = int(options.sample_rate)
+ src = audio.source (sample_rate, options.audio_input)
+ dst = audio.sink (sample_rate, options.audio_output)
+
+ vec1 = [1, -1]
+ vsource = gr.vector_source_f(vec1, True)
+ multiply = gr.multiply_ff()
+
+ self.connect(src, (multiply, 0))
+ self.connect(vsource, (multiply, 1))
+ self.connect(multiply, dst)
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
diff --git a/gnuradio-examples/python/audio/test_resampler.py b/gnuradio-examples/python/audio/test_resampler.py
new file mode 100755
index 0000000000..6c9e5a7608
--- /dev/null
+++ b/gnuradio-examples/python/audio/test_resampler.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+#
+
+from gnuradio import gr, gru, blks
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self):
+ gr.flow_graph.__init__(self)
+
+ parser = OptionParser(option_class=eng_option)
+ parser.add_option("-O", "--audio-output", type="string", default="",
+ help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
+ parser.add_option("-i", "--input-rate", type="eng_float", default=8000,
+ help="set input sample rate to RATE (%default)")
+ parser.add_option("-o", "--output-rate", type="eng_float", default=48000,
+ help="set output sample rate to RATE (%default)")
+ (options, args) = parser.parse_args ()
+ if len(args) != 0:
+ parser.print_help()
+ raise SystemExit, 1
+
+ input_rate = int(options.input_rate)
+ output_rate = int(options.output_rate)
+
+ interp = gru.lcm(input_rate, output_rate) / input_rate
+ decim = gru.lcm(input_rate, output_rate) / output_rate
+
+ print "interp =", interp
+ print "decim =", decim
+
+ ampl = 0.1
+ src0 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 650, ampl)
+ rr = blks.rational_resampler_fff(self, interp, decim)
+ dst = audio.sink (output_rate, options.audio_output)
+ self.connect (src0, rr, (dst, 0))
+
+
+if __name__ == '__main__':
+ try:
+ my_graph().run()
+ except KeyboardInterrupt:
+ pass
--
cgit v1.2.3