1 files changed, 71 insertions, 0 deletions
diff --git a/gnuradio-examples/python/audio/dialtone_v.py b/gnuradio-examples/python/audio/dialtone_v.py
new file mode 100755
index 000000000..e704414a9
--- /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