From 4df03f7bb6c99bb22f41d21e6c65c1b41e00ff05 Mon Sep 17 00:00:00 2001
From: jblum
Date: Wed, 8 Oct 2008 03:48:33 +0000
Subject: probe hier wrappers

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9741 221aa14e-8319-0410-a670-987f0aec2ac5
---
 grc/src/grc_gnuradio/blks2/probe.py | 107 ++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 grc/src/grc_gnuradio/blks2/probe.py

(limited to 'grc/src/grc_gnuradio/blks2/probe.py')

diff --git a/grc/src/grc_gnuradio/blks2/probe.py b/grc/src/grc_gnuradio/blks2/probe.py
new file mode 100644
index 000000000..28721422d
--- /dev/null
+++ b/grc/src/grc_gnuradio/blks2/probe.py
@@ -0,0 +1,107 @@
+#
+# Copyright 2008 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
+import threading
+import numpy
+import time
+
+class _probe_base(gr.hier_block2, threading.Thread):
+	"""
+	A hier2 block with float output and probe input.
+	The thread polls the prope for values and writes to a message source.
+	"""
+
+	def __init__(self, probe_block, probe_callback, probe_rate):
+		#init hier block
+		gr.hier_block2.__init__(
+			self, 'probe',
+			gr.io_signature(1, 1, probe_block.input_signature().sizeof_stream_items()[0]),
+			gr.io_signature(1, 1, gr.sizeof_float),
+		)
+		self._probe_callback = probe_callback
+		self.set_probe_rate(probe_rate)
+		#create message source
+		message_source = gr.message_source(gr.sizeof_float, 1)
+		self._msgq = message_source.msgq()
+		#connect
+		self.connect(self, probe_block)
+		self.connect(message_source, self)
+		#setup thread
+		threading.Thread.__init__(self)
+		self.setDaemon(True)
+		self.start()
+
+	def run(self):
+		"""
+		Infinite polling loop.
+		"""
+		while True:
+			time.sleep(1.0/self._probe_rate)
+			arr = numpy.array(self._probe_callback(), numpy.float32)
+			msg = gr.message_from_string(arr.tostring(), 0, gr.sizeof_float, 1)
+			self._msgq.insert_tail(msg)
+
+	def set_probe_rate(self, probe_rate):
+		self._probe_rate = probe_rate
+
+#######################################################################################
+## Probe: Average Magnitude Squared
+#######################################################################################
+class _probe_avg_mag_sqrd_base(_probe_base):
+	def __init__(self, threshold, alpha, probe_rate):
+		#create block
+		probe_block = self._probe_block_contructor[0](threshold, alpha)
+		#forward callbacks
+		self.set_alpha = probe_block.set_alpha
+		self.set_threshold = probe_block.set_threshold
+		#init
+		_probe_base.__init__(self, probe_block, probe_block.level, probe_rate)
+
+class probe_avg_mag_sqrd_c(_probe_avg_mag_sqrd_base): _probe_block_contructor = (gr.probe_avg_mag_sqrd_c,)
+class probe_avg_mag_sqrd_f(_probe_avg_mag_sqrd_base): _probe_block_contructor = (gr.probe_avg_mag_sqrd_f,)
+
+#######################################################################################
+## Probe: Density
+#######################################################################################
+class probe_density_b(_probe_base):
+	def __init__(self, alpha, probe_rate):
+		#create block
+		probe_block = gr.probe_density_b(alpha)
+		#forward callbacks
+		self.set_alpha = probe_block.set_alpha
+		#init
+		_probe_base.__init__(self, probe_block, probe_block.density, probe_rate)
+
+#######################################################################################
+## Probe: MPSK SNR
+#######################################################################################
+class probe_mpsk_snr_c(_probe_base):
+	def __init__(self, type, alpha, probe_rate):
+		"""
+		Type can be "snr", "signal_mean", or "noise_variance" 
+		"""
+		#create block
+		probe_block = gr.probe_mpsk_snr_c(alpha)
+		#forward callbacks
+		self.set_alpha = probe_block.set_alpha
+		#init
+		_probe_base.__init__(self, probe_block, getattr(probe_block, type), probe_rate)
-- 
cgit