Organized python example directory for new hierarchical blocks, cleaned up dial_tone2.py

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4190 221aa14e-8319-0410-a670-987f0aec2ac5

2 files changed, 107 insertions, 0 deletions

diff --git a/gnuradio-examples/python/hier/audio/Makefile.am b/gnuradio-examples/python/hier/audio/Makefile.am
new file mode 100644
index 000000000..50cf3e6cc
--- /dev/null
+++ b/gnuradio-examples/python/hier/audio/Makefile.am
@@ -0,0 +1,23 @@
+#
+# 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+EXTRA_DIST = \
+    dial_tone2.py
diff --git a/gnuradio-examples/python/hier/audio/dial_tone2.py b/gnuradio-examples/python/hier/audio/dial_tone2.py
new file mode 100755
index 000000000..cbb187a36
--- /dev/null
+++ b/gnuradio-examples/python/hier/audio/dial_tone2.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2005,2006 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
+from gnuradio import audio
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+# Top-level block creating a dial tone
+# Derives from new class gr.hier_block2
+class dial_tone(gr.hier_block2):
+	def __init__(self, 
+		     sample_rate,  # Audio output sample rate (int)
+		     audio_output, # Audio output device
+		     amplitude):   # Output volume (0.0-1.0)
+
+		# Call hierarchical block constructor
+		# Top-level blocks have no inputs or outputs
+		gr.hier_block2.__init__(self, 
+					"dial_tone",		# Block type 
+					gr.io_signature(0,0,0), # Input signature
+					gr.io_signature(0,0,0)) # Output signature
+
+		# Hierarchical blocks have a set of 'components' (which may
+		# be themselves hierarchical blocks), mapped to names.
+		# 'define_component' takes a string and either a hierarchical 
+		# block or an instance of a 'leaf node' (gr_block) block
+
+		# Give names to two sine wave sources and an audio sink
+		self.define_component("src0", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 350, amplitude))
+		self.define_component("src1", gr.sig_source_f (sample_rate, gr.GR_SIN_WAVE, 440, amplitude))
+		self.define_component("dst",  audio.sink(sample_rate, audio_output))
+
+		# Wire up outputs to inputs. (TODO: convenience functions)
+		self.connect("src0", 0, "dst", 0)	
+		self.connect("src1", 0, "dst", 1)
+	
+if __name__ == '__main__':
+	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("-a", "--amplitude", type="eng_float", default=0.1,
+			  help="set output volume to AMPLITUDE (0.1)")
+        (options, args) = parser.parse_args()
+        if len(args) != 0:
+            parser.print_help()
+            raise SystemExit, 1
+
+	# Create an instance of a hierarchical block
+	top_block = dial_tone(int(options.sample_rate), 
+			      options.audio_output, 
+			      options.amplitude)
+			      
+	# Create an instance of a runtime, passing it the top block
+	# to process
+	runtime = gr.runtime(top_block)
+
+	try:    
+		# Run forever
+		runtime.run()
+	except KeyboardInterrupt:
+		# Ctrl-C exits
+		pass