Added basic wavelet classifier blocks. GSL is now a prerequisite for

gnuradio-core.  Merged from eb/frank -r9627:9868 to trunk.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9870 221aa14e-8319-0410-a670-987f0aec2ac5

23 files changed, 1331 insertions, 3 deletions

diff --git a/config/Makefile.am b/config/Makefile.am
index 0ee6096a7..bdc79a5fa 100644
--- a/config/Makefile.am
+++ b/config/Makefile.am
@@ -26,6 +26,7 @@ m4datadir = $(datadir)/aclocal
 
 # List your m4 macros here
 m4macros = \
+	acx_cblas.m4 \
 	acx_pthread.m4 \
 	ax_boost_base.m4 \
 	ax_boost_date_time.m4 \
diff --git a/config/acx_cblas.m4 b/config/acx_cblas.m4
new file mode 100644
index 000000000..38d859828
--- /dev/null
+++ b/config/acx_cblas.m4
@@ -0,0 +1,227 @@
+# ===========================================================================
+#                http://autoconf-archive.cryp.to/acx_blas.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   ACX_CBLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro looks for a library that implements the CBLAS linear-algebra
+#   interface (see http://www.netlib.org/blas/). On success, it sets the
+#   CBLAS_LIBS output variable to hold the requisite library linkages.
+#
+#   To link with BLAS, you should link with:
+#
+#   	$CBLAS_LIBS $LIBS
+#
+#   Many libraries are searched for, from ATLAS to CXML to ESSL. The user
+#   may also use --with-blas=<lib> in order to use some specific CBLAS
+#   library <lib>. In order to link successfully, however, be aware that you
+#   will probably need to use the same Fortran compiler (which can be set
+#   via the F77 env. var.) as was used to compile the BLAS library.
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a CBLAS library is
+#   found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is
+#   not found. If ACTION-IF-FOUND is not specified, the default action will
+#   define HAVE_CBLAS.
+#
+#   This macro requires autoconf 2.50 or later.
+#
+# LAST MODIFICATION
+#
+#   2008-04-12
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+#   Copyright (c) 2008 Free Software Foundation, Inc.
+#
+#   This program 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 of the License, or (at your
+#   option) any later version.
+#
+#   This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Macro Archive. When you make and
+#   distribute a modified version of the Autoconf Macro, you may extend this
+#   special exception to the GPL to apply to your modified version as well.
+
+AC_DEFUN([ACX_CBLAS], [
+AC_PREREQ(2.50)
+dnl AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
+AC_REQUIRE([AC_CANONICAL_HOST])
+acx_cblas_ok=no
+
+AC_ARG_WITH(cblas,
+	[AC_HELP_STRING([--with-cblas=<lib>], [use CBLAS library <lib>])])
+case $with_cblas in
+	yes | "") ;;
+	no) acx_cblas_ok=disable ;;
+	-* | */* | *.a | *.so | *.so.* | *.o) CBLAS_LIBS="$with_cblas" ;;
+	*) CBLAS_LIBS="-l$with_cblas" ;;
+esac
+
+
+acx_cblas_save_LIBS="$LIBS"
+LIBS="$LIBS $FLIBS"
+
+# First, check CBLAS_LIBS environment variable
+if test $acx_cblas_ok = no; then
+if test "x$CBLAS_LIBS" != x; then
+	save_LIBS="$LIBS"; LIBS="$CBLAS_LIBS $LIBS"
+	AC_MSG_CHECKING([for cblas_sgemm in $CBLAS_LIBS])
+	AC_TRY_LINK_FUNC(cblas_sgemm, [acx_cblas_ok=yes], [CBLAS_LIBS=""])
+	AC_MSG_RESULT($acx_cblas_ok)
+	LIBS="$save_LIBS"
+fi
+fi
+
+# CBLAS linked to by default?  (happens on some supercomputers)
+if test $acx_cblas_ok = no; then
+	save_LIBS="$LIBS"; LIBS="$LIBS"
+	AC_CHECK_FUNC(cblas_sgemm, [acx_cblas_ok=yes])
+	LIBS="$save_LIBS"
+fi
+
+# CBLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(atlas, ATL_xerbla,
+	    [AC_CHECK_LIB(cblas, cblas_dgemm,
+	        [acx_cblas_ok=yes
+		 CBLAS_LIBS="-lcblas -latlas"],
+                [], [-latlas])],
+	    [], [-latlas])
+fi
+
+# CBLAS in ATLAS library in /usr/lib64/atlas (if not cross-compiling)
+if test $acx_cblas_ok = no && test "$cross_compiling" = no; then
+	unset ac_cv_lib_atlas_ATL_xerbla
+	unset ac_cv_lib_cblas_cblas_dgemm
+	AC_CHECK_LIB(atlas, ATL_xerbla,
+	    [AC_CHECK_LIB(cblas, cblas_dgemm,
+	        [acx_cblas_ok=yes
+		 CBLAS_LIBS="-L/usr/lib64/atlas -lcblas -latlas"],
+                [], [-L/usr/lib64/atlas -latlas])],
+	    [], [-L/usr/lib64/atlas -latlas])
+fi
+
+# CBLAS in ATLAS library in /usr/lib/atlas (if not cross-compiling)
+if test $acx_cblas_ok = no && test "$cross_compiling" = no; then
+	unset ac_cv_lib_atlas_ATL_xerbla
+	unset ac_cv_lib_cblas_cblas_dgemm
+	AC_CHECK_LIB(atlas, ATL_xerbla,
+	    [AC_CHECK_LIB(cblas, cblas_dgemm,
+	        [acx_cblas_ok=yes
+		 CBLAS_LIBS="-L/usr/lib/atlas -lcblas -latlas"],
+                [], [-L/usr/lib/atlas -latlas])],
+	    [], [-L/usr/lib/atlas -latlas])
+fi
+
+
+# CBLAS in PhiPACK libraries? (requires generic BLAS lib, too)
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(cblas, cblas_sgemm,
+		[AC_CHECK_LIB(dgemm, cblas_dgemm,
+		[AC_CHECK_LIB(sgemm, cblas_sgemm,
+			[acx_cblas_ok=yes; CBLAS_LIBS="-lsgemm -ldgemm -lblas"],
+			[], [-lblas])],
+			[], [-lblas])])
+fi
+
+# BLAS in Intel MKL library?
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(mkl, cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-lmkl"])
+fi
+
+# CBLAS in Apple vecLib library?
+if test $acx_cblas_ok = no; then
+	save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS"
+	AC_CHECK_FUNC(cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-framework vecLib"])
+	LIBS="$save_LIBS"
+fi
+
+# CBLAS in Alpha CXML library?
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(cxml, cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-lcxml"])
+fi
+
+# CBLAS in Alpha DXML library? (now called CXML, see above)
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(dxml, cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-ldxml"])
+fi
+
+# CBLAS in Sun Performance library?
+if test $acx_cblas_ok = no; then
+	if test "x$GCC" != xyes; then # only works with Sun CC
+		AC_CHECK_LIB(sunmath, acosp,
+			[AC_CHECK_LIB(sunperf, cblas_sgemm,
+        			[CBLAS_LIBS="-xlic_lib=sunperf -lsunmath"
+                                 acx_cblas_ok=yes],[],[-lsunmath])])
+	fi
+fi
+
+# CBLAS in SCSL library?  (SGI/Cray Scientific Library)
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(scs, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lscs"])
+fi
+
+# CBLAS in SGIMATH library?
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(complib.sgimath, cblas_sgemm,
+		     [acx_cblas_ok=yes; CBLAS_LIBS="-lcomplib.sgimath"])
+fi
+
+# CBLAS in IBM ESSL library? (requires generic CBLAS lib, too)
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(cblas, cblas_sgemm,
+		[AC_CHECK_LIB(essl, cblas_sgemm,
+			[acx_cblas_ok=yes; CBLAS_LIBS="-lessl -lblas"],
+			[], [-lblas $FLIBS])])
+fi
+
+# Generic CBLAS library?
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(cblas, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lcblas"])
+fi
+
+# Generic BLAS library?
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(blas, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lblas"])
+fi
+
+# GSL generic CBLAS library?
+if test $acx_cblas_ok = no; then
+	AC_CHECK_LIB(gslcblas, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lgslcblas"])
+fi
+
+AC_SUBST(CBLAS_LIBS)
+
+LIBS="$acx_cblas_save_LIBS"
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$acx_cblas_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_CBLAS,1,[Define if you have a CBLAS library.]),[$1])
+        :
+else
+        acx_cblas_ok=no
+        $2
+fi
+])dnl ACX_CBLAS
diff --git a/config/grc_gnuradio_core.m4 b/config/grc_gnuradio_core.m4
index df2ec305d..607f36a73 100644
--- a/config/grc_gnuradio_core.m4
+++ b/config/grc_gnuradio_core.m4
@@ -36,6 +36,15 @@ AC_DEFUN([GRC_GNURADIO_CORE],[
     dnl   with : if the --with code didn't error out
     dnl   yes  : if the --enable code passed muster and all dependencies are met
     dnl   no   : otherwise
+    if test $passed = yes; then	
+	dnl look for fast CBLAS for GSL, but don't complain if not found
+	ACX_CBLAS([],[])
+        dnl check for GSL
+	PKG_CHECK_MODULES(GSL, gsl >= 1.10,
+	    [], dnl FIXME remove -lgslcblas from GSL_LIBS if we found a better CBLAS_LIBS above
+	    [passed=no;AC_MSG_RESULT([gnuradio-core requires package gsl, not found.])])
+    fi
+
     if test $passed != with; then
 	dnl how and where to find INCLUDES and LA and such
         gnuradio_core_INCLUDES="\
@@ -52,7 +61,8 @@ AC_DEFUN([GRC_GNURADIO_CORE],[
 -I\${abs_top_srcdir}/gnuradio-core/src/lib/g72x \
 -I\${abs_top_srcdir}/gnuradio-core/src/lib/swig \
 -I\${abs_top_builddir}/gnuradio-core/src/lib/swig \
-\$(FFTW3F_CFLAGS)"
+\$(FFTW3F_CFLAGS) \
+\$(GSL_CFLAGS)"
         gnuradio_core_LA="\${abs_top_builddir}/gnuradio-core/src/lib/libgnuradio-core.la"
 	gnuradio_core_I="\${abs_top_srcdir}/gnuradio-core/src/lib/swig/gnuradio.i"
 	gnuradio_core_LIBDIRPATH="\${abs_top_builddir}/gnuradio-core/src/lib:\${abs_top_builddir}/gnuradio-core/src/lib/.libs"
diff --git a/gnuradio-core/src/lib/Makefile.am b/gnuradio-core/src/lib/Makefile.am
index e4646cfcc..dea284067 100644
--- a/gnuradio-core/src/lib/Makefile.am
+++ b/gnuradio-core/src/lib/Makefile.am
@@ -50,7 +50,9 @@ libgnuradio_core_la_LIBADD  = 		\
 	runtime/libruntime.la		\
 	$(OMNITHREAD_LA)		\
 	$(GRUEL_LA)			\
-	$(FFTW3F_LIBS)
+	$(FFTW3F_LIBS)			\
+	$(GSL_LIBS)			\
+	$(CBLAS_LIBS)			
 
 libgnuradio_core_qa_la_LIBADD  = 	\
 	filter/libfilter-qa.la		\
diff --git a/gnuradio-core/src/lib/general/Makefile.am b/gnuradio-core/src/lib/general/Makefile.am
index b46590070..7d486092a 100644
--- a/gnuradio-core/src/lib/general/Makefile.am
+++ b/gnuradio-core/src/lib/general/Makefile.am
@@ -125,6 +125,7 @@ libgeneral_la_SOURCES = 		\
 	gr_pwr_squelch_cc.cc		\
 	gr_pwr_squelch_ff.cc		\
 	gr_quadrature_demod_cf.cc	\
+	gr_rail_ff.cc			\
 	gr_random.cc			\
 	gr_regenerate_bb.cc		\
 	gr_remez.cc			\
@@ -137,6 +138,7 @@ libgeneral_la_SOURCES = 		\
 	gr_simple_framer.cc		\
 	gr_simple_squelch_cc.cc		\
 	gr_skiphead.cc			\
+	gr_squash_ff.cc			\
 	gr_squelch_base_cc.cc		\
 	gr_squelch_base_ff.cc		\
 	gr_stream_mux.cc		\
@@ -144,6 +146,7 @@ libgeneral_la_SOURCES = 		\
 	gr_stream_to_vector.cc		\
 	gr_streams_to_stream.cc		\
 	gr_streams_to_vector.cc		\
+	gr_stretch_ff.cc		\
         gr_test.cc                      \
 	gr_threshold_ff.cc		\
 	gr_throttle.cc			\
@@ -151,6 +154,8 @@ libgeneral_la_SOURCES = 		\
 	gr_vco_f.cc			\
 	gr_vector_to_stream.cc		\
 	gr_vector_to_streams.cc		\
+	gr_wavelet_ff.cc		\
+	gr_wvps_ff.cc			\
 	gri_add_const_ss_generic.cc	\
 	gri_char_to_float.cc		\
 	gri_debugger_hook.cc		\
@@ -275,6 +280,7 @@ grinclude_HEADERS = 			\
 	gr_pwr_squelch_cc.h		\
 	gr_pwr_squelch_ff.h		\
 	gr_quadrature_demod_cf.h	\
+	gr_rail_ff.h			\
 	gr_random.h			\
 	gr_regenerate_bb.h		\
 	gr_remez.h			\
@@ -287,6 +293,7 @@ grinclude_HEADERS = 			\
 	gr_simple_framer.h		\
 	gr_simple_framer_sync.h		\
 	gr_simple_squelch_cc.h		\
+	gr_squash_ff.h			\
 	gr_skiphead.h			\
 	gr_squelch_base_cc.h		\
 	gr_squelch_base_ff.h		\
@@ -295,6 +302,7 @@ grinclude_HEADERS = 			\
 	gr_stream_to_vector.h		\
 	gr_streams_to_stream.h		\
 	gr_streams_to_vector.h		\
+	gr_stretch_ff.h			\
         gr_test_types.h			\
         gr_test.h			\
 	gr_threshold_ff.h		\
@@ -304,6 +312,8 @@ grinclude_HEADERS = 			\
 	gr_vco_f.h			\
 	gr_vector_to_stream.h		\
 	gr_vector_to_streams.h		\
+	gr_wavelet_ff.h			\
+	gr_wvps_ff.h			\
 	gri_add_const_ss.h		\
 	gri_agc_cc.h			\
 	gri_agc_ff.h			\
@@ -427,6 +437,7 @@ swiginclude_HEADERS =			\
 	gr_pwr_squelch_cc.i		\
 	gr_pwr_squelch_ff.i		\
 	gr_quadrature_demod_cf.i	\
+	gr_rail_ff.i			\
 	gr_regenerate_bb.i		\
 	gr_remez.i			\
 	gr_rms_cf.i			\
@@ -437,6 +448,7 @@ swiginclude_HEADERS =			\
 	gr_simple_framer.i		\
 	gr_simple_squelch_cc.i		\
 	gr_skiphead.i			\
+	gr_squash_ff.i			\
 	gr_squelch_base_cc.i		\
 	gr_squelch_base_ff.i		\
 	gr_stream_mux.i			\
@@ -444,6 +456,7 @@ swiginclude_HEADERS =			\
 	gr_stream_to_vector.i		\
 	gr_streams_to_stream.i		\
 	gr_streams_to_vector.i		\
+	gr_stretch_ff.i			\
         gr_test.i			\
 	gr_threshold_ff.i		\
 	gr_throttle.i			\
@@ -452,6 +465,8 @@ swiginclude_HEADERS =			\
 	gr_vector_to_stream.i		\
 	gr_vector_to_streams.i		\
 	gr_unpack_k_bits_bb.i		\
+	gr_wavelet_ff.i			\
+	gr_wvps_ff.i			\
 	gri_agc_cc.i			\
 	gri_agc_ff.i			\
 	gri_agc2_cc.i			\
diff --git a/gnuradio-core/src/lib/general/general.i b/gnuradio-core/src/lib/general/general.i
index 542bf6064..e7d9e978e 100644
--- a/gnuradio-core/src/lib/general/general.i
+++ b/gnuradio-core/src/lib/general/general.i
@@ -133,6 +133,12 @@
 #include <gr_scrambler_bb.h>
 #include <gr_probe_mpsk_snr_c.h>
 #include <gr_probe_density_b.h>
+#include <gr_rail_ff.h>
+#include <gr_squash_ff.h>
+#include <gr_stretch_ff.h>
+#include <gr_wavelet_ff.h>
+#include <gr_wvps_ff.h>
+
 %}
 
 %include "gr_nop.i"
@@ -246,3 +252,8 @@
 %include "gr_scrambler_bb.i"
 %include "gr_probe_mpsk_snr_c.i"
 %include "gr_probe_density_b.i"
+%include "gr_rail_ff.i"
+%include "gr_squash_ff.i"
+%include "gr_stretch_ff.i"
+%include "gr_wavelet_ff.i"
+%include "gr_wvps_ff.i"
diff --git a/gnuradio-core/src/lib/general/gr_rail_ff.cc b/gnuradio-core/src/lib/general/gr_rail_ff.cc
new file mode 100644
index 000000000..9fd3af8df
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_rail_ff.cc
@@ -0,0 +1,62 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gr_rail_ff.h>
+#include <gr_io_signature.h>
+
+gr_rail_ff_sptr
+gr_make_rail_ff(float lo, float hi)
+{
+  return gr_rail_ff_sptr(new gr_rail_ff(lo, hi));
+}
+
+gr_rail_ff::gr_rail_ff(float lo, float hi)
+  : gr_sync_block("rail_ff",
+		  gr_make_io_signature(1, 1, sizeof(float)),
+		  gr_make_io_signature(1, 1, sizeof(float))),
+    d_lo(lo), d_hi(hi)
+{
+}
+
+int
+gr_rail_ff::work(int noutput_items,
+		 gr_vector_const_void_star &input_items,
+		 gr_vector_void_star &output_items)
+{
+  const float *in  = (const float *) input_items[0];
+  float       *out = (float *) output_items[0];
+  
+  for (int i = 0; i < noutput_items; i++) {
+    if (in[i] < d_lo)
+      out[i] = d_lo;
+    else if (in[i] > d_hi)
+      out[i] = d_hi;
+    else
+      out[i] = in[i];
+  }
+
+  return noutput_items;
+}
diff --git a/gnuradio-core/src/lib/general/gr_rail_ff.h b/gnuradio-core/src/lib/general/gr_rail_ff.h
new file mode 100644
index 000000000..d9e19a964
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_rail_ff.h
@@ -0,0 +1,56 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifndef   	INCLUDED_GR_RAIL_FF_H_
+# define   	INCLUDED_GR_RAIL_FF_H_
+
+#include <gr_sync_block.h>
+
+/*!
+ * \brief clips input values to min, max
+ * \ingroup misc
+ */
+
+class gr_rail_ff;
+typedef boost::shared_ptr<gr_rail_ff> gr_rail_ff_sptr;
+
+gr_rail_ff_sptr gr_make_rail_ff(float lo, float hi);
+
+class gr_rail_ff : public gr_sync_block
+{
+  friend gr_rail_ff_sptr gr_make_rail_ff (float lo, float hi);
+
+  float	d_lo, d_hi;		// the constant
+  gr_rail_ff(float lo, float hi);
+
+ public:
+  float lo() const { return d_lo; }
+  void set_lo(float lo) { d_lo = lo; }
+  float hi() const { return d_hi; }
+  void set_hi(float hi) { d_hi = hi; }
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+};
+
+#endif
diff --git a/gnuradio-core/src/lib/general/gr_rail_ff.i b/gnuradio-core/src/lib/general/gr_rail_ff.i
new file mode 100644
index 000000000..ae39b76de
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_rail_ff.i
@@ -0,0 +1,30 @@
+/* -*- c++ -*- */
+/*
+ * 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,rail_ff);
+
+gr_rail_ff_sptr gr_make_rail_ff(float lo, float hi);
+
+class gr_rail_ff : public gr_sync_block
+{
+private:
+  gr_rail_ff(float lo, float hi);
+};
diff --git a/gnuradio-core/src/lib/general/gr_squash_ff.cc b/gnuradio-core/src/lib/general/gr_squash_ff.cc
new file mode 100644
index 000000000..977376bc5
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_squash_ff.cc
@@ -0,0 +1,93 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdexcept>
+#include <gr_squash_ff.h>
+#include <gr_io_signature.h>
+
+// expect input vector of igrid.size y-values,
+// produce output vector of ogrid.size y-values
+
+gr_squash_ff_sptr
+gr_make_squash_ff(const std::vector<float> &igrid,
+		  const std::vector<float> &ogrid)
+{
+  return gr_squash_ff_sptr(new gr_squash_ff(igrid, ogrid));
+}
+
+gr_squash_ff::gr_squash_ff(const std::vector<float> &igrid,
+			   const std::vector<float> &ogrid)
+  : gr_sync_block("squash_ff",
+		  gr_make_io_signature(1, 1, sizeof(float) * igrid.size()),
+		  gr_make_io_signature(1, 1, sizeof(float) * ogrid.size()))
+{
+  d_inum  = igrid.size();
+  d_onum  = ogrid.size();
+  d_igrid = (double *) malloc(d_inum * sizeof(double));
+  d_iwork = (double *) malloc(d_inum * sizeof(double));
+  d_ogrid = (double *) malloc(d_onum * sizeof(double));
+  for (int i = 0; i < d_inum; i++)
+    d_igrid[i] = igrid[i];
+  for (int i = 0; i < d_onum; i++)
+    d_ogrid[i] = ogrid[i];
+
+  d_accel = gsl_interp_accel_alloc();
+  d_spline = gsl_spline_alloc(gsl_interp_cspline, d_inum);	// FIXME check w/ Frank
+}
+
+gr_squash_ff::~gr_squash_ff()
+{
+  free((char *) d_igrid);
+  free((char *) d_iwork);
+  free((char *) d_ogrid);
+  gsl_interp_accel_free(d_accel);
+  gsl_spline_free(d_spline);
+}
+
+int
+gr_squash_ff::work(int noutput_items,
+		    gr_vector_const_void_star &input_items,
+		    gr_vector_void_star &output_items)
+{
+  const float *in  = (const float *) input_items[0];
+  float       *out = (float *) output_items[0];
+
+  for (int count = 0; count < noutput_items; count++) {
+
+    for (int i = 0; i < d_inum; i++)
+      d_iwork[i] = in[i];
+
+    gsl_spline_init(d_spline, d_igrid, d_iwork, d_inum);
+    
+    for (int i = 0; i < d_onum; i++)
+      out[i] = gsl_spline_eval(d_spline, d_ogrid[i], d_accel);
+
+    in  += d_inum;
+    out += d_onum;
+  }
+
+  return noutput_items;
+}
diff --git a/gnuradio-core/src/lib/general/gr_squash_ff.h b/gnuradio-core/src/lib/general/gr_squash_ff.h
new file mode 100644
index 000000000..43880857e
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_squash_ff.h
@@ -0,0 +1,67 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifndef   	INCLUDED_GR_SQUASH_FF_H_
+# define   	INCLUDED_GR_SQUASH_FF_H_
+
+#include <gr_sync_block.h>
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_interp.h>
+#include <gsl/gsl_spline.h>
+/*!
+ * \brief implements cheap resampling of spectrum directly from
+ * spectral points, using gsl interpolation
+ * \ingroup misc
+ */
+
+class gr_squash_ff;
+typedef boost::shared_ptr<gr_squash_ff> gr_squash_ff_sptr;
+
+gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
+				    const std::vector<float> &ogrid);
+
+class gr_squash_ff : public gr_sync_block
+{
+  friend gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
+					     const std::vector<float> &ogrid);
+  
+  size_t  d_inum;
+  size_t  d_onum;
+  double *d_igrid;
+  double *d_iwork;
+  double *d_ogrid;
+
+  gsl_interp_accel *d_accel;
+  gsl_spline       *d_spline;
+  
+  gr_squash_ff(const std::vector<float> &igrid,
+	       const std::vector<float> &ogrid);
+
+ public:
+  ~gr_squash_ff();
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+};
+
+#endif
diff --git a/gnuradio-core/src/lib/general/gr_squash_ff.i b/gnuradio-core/src/lib/general/gr_squash_ff.i
new file mode 100644
index 000000000..c89b1c28d
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_squash_ff.i
@@ -0,0 +1,34 @@
+/* -*- c++ -*- */
+/*
+ * 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,squash_ff);
+
+gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
+				    const std::vector<float> &ogrid);
+
+class gr_squash_ff : public gr_sync_block
+{
+private:
+  gr_squash_ff(const std::vector<float> &igrid,
+	       const std::vector<float> &ogrid);
+
+};
+
diff --git a/gnuradio-core/src/lib/general/gr_stretch_ff.cc b/gnuradio-core/src/lib/general/gr_stretch_ff.cc
new file mode 100644
index 000000000..0913d5277
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_stretch_ff.cc
@@ -0,0 +1,74 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gr_stretch_ff.h>
+#include <gr_io_signature.h>
+
+gr_stretch_ff_sptr
+gr_make_stretch_ff(float lo, size_t vlen)
+{
+  return gr_stretch_ff_sptr(new gr_stretch_ff(lo, vlen));
+}
+
+gr_stretch_ff::gr_stretch_ff(float lo, size_t vlen)
+  : gr_sync_block("stretch_ff",
+		  gr_make_io_signature(1, 1, vlen * sizeof(float)),
+		  gr_make_io_signature(1, 1, vlen * sizeof(float))),
+    d_lo(lo), d_vlen(vlen)
+{
+}
+
+int
+gr_stretch_ff::work(int noutput_items,
+		    gr_vector_const_void_star &input_items,
+		    gr_vector_void_star &output_items)
+{
+  const float *in  = (const float *) input_items[0];
+  float       *out = (float *) output_items[0];
+  
+  for (int count = 0; count < noutput_items; count++) {
+    float vmax = in[0] - d_lo;
+
+    for (int i = 1; i < d_vlen; i++) {
+      float vtmp = in[i] - d_lo;
+      if (vtmp > vmax)
+	vmax = vtmp;
+    }
+    
+    if (vmax != 0.0)
+      for (int i = 0; i < d_vlen; i++)
+	out[i] = d_lo * (1.0 - (in[i] - d_lo) / vmax);
+    else
+      for (int i = 0; i < d_vlen; i++)
+	out[i] = in[i];
+
+    in  += d_vlen;
+    out += d_vlen;
+  }
+  
+  return noutput_items;
+}
+
diff --git a/gnuradio-core/src/lib/general/gr_stretch_ff.h b/gnuradio-core/src/lib/general/gr_stretch_ff.h
new file mode 100644
index 000000000..d2164f8f4
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_stretch_ff.h
@@ -0,0 +1,59 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifndef   	INCLUDED_GR_STRETCH_FF_H_
+# define   	INCLUDED_GR_STRETCH_FF_H_
+
+#include <gr_sync_block.h>
+
+/*!
+ * \brief adjust y-range of an input vector by mapping to range
+ * (max-of-input, stipulated-min). Primarily for spectral signature
+ * matching by normalizing spectrum dynamic ranges.
+ * \ingroup misc
+ */
+
+
+class gr_stretch_ff;
+typedef boost::shared_ptr<gr_stretch_ff> gr_stretch_ff_sptr;
+
+gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
+
+class gr_stretch_ff : public gr_sync_block
+{
+  friend gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
+
+  float	d_lo;		// the constant
+  size_t d_vlen;
+  gr_stretch_ff(float lo, size_t vlen);
+
+ public:
+  float lo() const { return d_lo; }
+  void set_lo(float lo) { d_lo = lo; }
+  size_t vlen() const { return d_vlen; }
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+};
+
+#endif
diff --git a/gnuradio-core/src/lib/general/gr_stretch_ff.i b/gnuradio-core/src/lib/general/gr_stretch_ff.i
new file mode 100644
index 000000000..74c10fb2f
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_stretch_ff.i
@@ -0,0 +1,31 @@
+/* -*- c++ -*- */
+/*
+ * 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,stretch_ff);
+
+gr_stretch_ff_sptr gr_make_stretch_ff(float lo, size_t vlen);
+
+class gr_stretch_ff : public gr_sync_block
+{
+private:
+  gr_stretch_ff(float lo, size_t vlen);
+};
+
diff --git a/gnuradio-core/src/lib/general/gr_wavelet_ff.cc b/gnuradio-core/src/lib/general/gr_wavelet_ff.cc
new file mode 100644
index 000000000..6cbfa2381
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_wavelet_ff.cc
@@ -0,0 +1,107 @@
+/* -*- c++ -*- */
+/*
+ * 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 tewavelet 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdexcept>
+#include <gr_wavelet_ff.h>
+#include <gr_io_signature.h>
+
+#include <stdio.h>
+
+// NB in this version, only Daubechies wavelets
+// order is wavelet length, even, 2...20
+
+gr_wavelet_ff_sptr
+gr_make_wavelet_ff(int size,
+		   int order,
+		   bool forward)
+{
+  return gr_wavelet_ff_sptr(new gr_wavelet_ff(size,
+					      order,
+					      forward));
+}
+
+gr_wavelet_ff::gr_wavelet_ff(int size,
+			     int order,
+			     bool forward)
+  : gr_sync_block("wavelet_ff",
+		  gr_make_io_signature(1, 1, size * sizeof(float)),
+		  gr_make_io_signature(1, 1, size * sizeof(float))),
+    d_size(size),
+    d_order(order),
+    d_forward(forward)
+{
+  d_wavelet = gsl_wavelet_alloc(gsl_wavelet_daubechies, d_order);
+  if (d_wavelet == NULL)
+    throw std::runtime_error("can't allocate wavelet");
+  d_workspace = gsl_wavelet_workspace_alloc(d_size);
+  if (d_workspace == NULL)
+    throw std::runtime_error("can't allocate wavelet workspace");
+  d_temp = (double *) malloc(d_size*sizeof(double));
+  if (d_workspace == NULL)
+    throw std::runtime_error("can't allocate wavelet double conversion temp");
+}
+
+gr_wavelet_ff::~gr_wavelet_ff()
+{
+  gsl_wavelet_free(d_wavelet);
+  gsl_wavelet_workspace_free(d_workspace);
+  free((char *) d_temp);
+}
+
+int
+gr_wavelet_ff::work(int noutput_items,
+		    gr_vector_const_void_star &input_items,
+		    gr_vector_void_star &output_items)
+{
+  const float *in  = (const float *) input_items[0];
+  float       *out = (float *) output_items[0];
+
+  for (int count = 0; count < noutput_items; count++) {
+    for (int i = 0; i < d_size; i++)
+      d_temp[i] = in[i];
+    
+    if (d_forward)
+      gsl_wavelet_transform_forward(d_wavelet,
+				    d_temp,
+				    1,
+				    d_size,
+				    d_workspace);
+    else
+      gsl_wavelet_transform_inverse(d_wavelet,
+				    d_temp,
+				    1,
+				    d_size,
+				    d_workspace);
+    
+    for (int i = 0; i < d_size; i++)
+      out[i] = d_temp[i];
+
+    in  += d_size;
+    out += d_size;
+  }
+
+  return noutput_items;
+}
diff --git a/gnuradio-core/src/lib/general/gr_wavelet_ff.h b/gnuradio-core/src/lib/general/gr_wavelet_ff.h
new file mode 100644
index 000000000..1e98d2e49
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_wavelet_ff.h
@@ -0,0 +1,70 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 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 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.
+ */
+#ifndef INCLUDED_GR_WAVELET_FF_H
+#define INCLUDED_GR_WAVELET_FF_H
+
+#include <iostream>
+#include <gr_sync_block.h>
+
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_wavelet.h>
+
+class gr_wavelet_ff;
+typedef boost::shared_ptr<gr_wavelet_ff> gr_wavelet_ff_sptr;
+
+gr_wavelet_ff_sptr
+gr_make_wavelet_ff(int size = 1024,
+		   int order = 20,
+		   bool forward = true);
+
+/*!
+ * \brief compute wavelet transform using gsl routines
+ * \ingroup math
+ */
+
+class gr_wavelet_ff : public gr_sync_block
+{
+  int                    d_size;
+  int                    d_order;
+  bool			 d_forward;
+  gsl_wavelet           *d_wavelet;
+  gsl_wavelet_workspace *d_workspace;
+  double                *d_temp;
+
+  friend gr_wavelet_ff_sptr
+    gr_make_wavelet_ff(int size,
+		       int order,
+		       bool forward);
+
+  gr_wavelet_ff(int size,
+		int order,
+		bool forward);
+
+public:
+  ~gr_wavelet_ff();
+
+  int work (int noutput_items,
+	    gr_vector_const_void_star &input_items,
+	    gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_GR_WAVELET_FF_H */
diff --git a/gnuradio-core/src/lib/general/gr_wavelet_ff.i b/gnuradio-core/src/lib/general/gr_wavelet_ff.i
new file mode 100644
index 000000000..9d4264170
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_wavelet_ff.i
@@ -0,0 +1,31 @@
+/* -*- c++ -*- */
+/*
+ * 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+GR_SWIG_BLOCK_MAGIC(gr,wavelet_ff);
+
+gr_wavelet_ff_sptr gr_make_wavelet_ff(int size, int order, bool forward);
+
+class gr_wavelet_ff : public gr_sync_block
+{
+private:
+  gr_wavelet_ff(int size, int order, bool forward);
+};
+
diff --git a/gnuradio-core/src/lib/general/gr_wvps_ff.cc b/gnuradio-core/src/lib/general/gr_wvps_ff.cc
new file mode 100644
index 000000000..f814ba8fc
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_wvps_ff.cc
@@ -0,0 +1,98 @@
+/* -*- c++ -*- */
+/*
+ * 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 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gr_wvps_ff.h>
+#include <gr_io_signature.h>
+#include <string.h>
+
+static int
+ceil_log2(int k)
+{
+  int m = 0;
+  for (int n = k-1; n > 0; n >>= 1) m++;
+  return m;
+}
+
+gr_wvps_ff_sptr
+gr_make_wvps_ff(int ilen)
+{
+  return gr_wvps_ff_sptr(new gr_wvps_ff(ilen));
+}
+
+gr_wvps_ff::gr_wvps_ff(int ilen)
+  : gr_sync_block("wvps_ff",
+		  gr_make_io_signature(1, 1, sizeof(float) * ilen),
+		  gr_make_io_signature(1, 1, sizeof(float) * ceil_log2(ilen))),
+    d_ilen(ilen), d_olen(ceil_log2(ilen))
+{
+}
+
+// input vector assumed to be output from gsl wavelet computation
+
+int
+gr_wvps_ff::work(int noutput_items,
+		 gr_vector_const_void_star &input_items,
+		 gr_vector_void_star &output_items)
+{
+  const float *in  = (const float *) input_items[0];
+  float       *out = (float *) output_items[0];
+
+  for (int count = 0; count < noutput_items; count++) {
+
+    // any power?
+
+    if (in[0] == 0.0) {
+      for (int i = 0; i < d_olen; i++)
+	out[i] = 0.0;
+
+    } else {
+      
+      // get power normalization from 0-th wavelet coefficient
+
+      float scl = 1.0/(in[0]*in[0]);
+      int k = 1;
+      
+      // sum powers over sequences of bins,
+      // sequence lengths in increasing powers of 2
+      
+      for (int e = 0; e < d_olen; e++) {
+	int m = 01<<e;
+	float sum = 0.0;
+	
+	for (int l = 0; l < m; l++)
+	  sum += (in[k+l]*in[k+l]);
+	
+	out[e] = scl*sum;
+	k += m;
+      }
+    }
+
+    in  += d_ilen;
+    out += d_olen;
+  }
+
+  return noutput_items;
+}
diff --git a/gnuradio-core/src/lib/general/gr_wvps_ff.h b/gnuradio-core/src/lib/general/gr_wvps_ff.h
new file mode 100644
index 000000000..ced9646bb
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_wvps_ff.h
@@ -0,0 +1,57 @@
+/* -*- c++ -*- */
+/*
+ * 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.
+ */
+
+#ifndef INCLUDED_GR_WVPS_FF_H
+#define INCLUDED_GR_WVPS_FF_H
+
+#include <gr_sync_decimator.h>
+
+class gr_wvps_ff;
+typedef boost::shared_ptr<gr_wvps_ff> gr_wvps_ff_sptr;
+
+gr_wvps_ff_sptr 
+gr_make_wvps_ff(int ilen);
+
+
+/*!
+ * \brief computes the Wavelet Power Spectrum from a set of wavelet coefficients
+ * \ingroup misc
+ */
+class gr_wvps_ff : public gr_sync_block
+{
+  friend gr_wvps_ff_sptr
+  gr_make_wvps_ff(int ilen);
+
+  int d_ilen;
+  int d_olen;
+
+ protected:
+  gr_wvps_ff(int ilen);
+
+ public:
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+
+};
+
+#endif /* INCLUDED_GR_WVPS_FF_H */
diff --git a/gnuradio-core/src/lib/general/gr_wvps_ff.i b/gnuradio-core/src/lib/general/gr_wvps_ff.i
new file mode 100644
index 000000000..877126fb2
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_wvps_ff.i
@@ -0,0 +1,29 @@
+/* -*- c++ -*- */
+/*
+ * 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+GR_SWIG_BLOCK_MAGIC(gr,wvps_ff);
+
+gr_wvps_ff_sptr gr_make_wvps_ff(int ilen);
+
+class gr_wvps_ff : public gr_sync_block
+{
+private:
+  gr_wvps_ff(int ilen);
+};
diff --git a/gnuradio-core/src/python/gnuradio/gr/Makefile.am b/gnuradio-core/src/python/gnuradio/gr/Makefile.am
index 8b07e4ae1..31d8831fa 100644
--- a/gnuradio-core/src/python/gnuradio/gr/Makefile.am
+++ b/gnuradio-core/src/python/gnuradio/gr/Makefile.am
@@ -49,6 +49,7 @@ noinst_PYTHON = 			\
 	qa_agc.py			\
 	qa_argmax.py			\
 	qa_bin_statistics.py		\
+	qa_classify.py			\
 	qa_cma_equalizer.py		\
 	qa_complex_to_xxx.py		\
 	qa_constellation_decoder_cb.py  \
@@ -93,4 +94,5 @@ noinst_PYTHON = 			\
 	qa_skiphead.py			\
 	qa_unpack_k_bits.py		\
 	qa_repeat.py                    \
-	qa_scrambler.py
+	qa_scrambler.py			\
+	qa_vector_sink_source.py	
diff --git a/gnuradio-core/src/python/gnuradio/gr/qa_classify.py b/gnuradio-core/src/python/gnuradio/gr/qa_classify.py
new file mode 100755
index 000000000..20ce084dc
--- /dev/null
+++ b/gnuradio-core/src/python/gnuradio/gr/qa_classify.py
@@ -0,0 +1,162 @@
+#!/usr/bin/env python
+
+import numpy
+from gnuradio import gr, gr_unittest
+import copy
+import pygsl.wavelet as wavelet
+import math
+
+
+def sqr(x):
+    return x*x
+
+def np2(k):
+    m = 0
+    n = k - 1
+    while n > 0:
+        m += 1
+    return m
+
+
+class qa_classify(gr_unittest.TestCase):
+
+    def setUp(self):
+        self.tb = gr.top_block()
+
+    def tearDown(self):
+        self.tb = None
+
+#     def test_000_(self):
+#         src_data = numpy.zeros(10)
+#         trg_data = numpy.zeros(10)
+#         src = gr.vector_source_f(src_data)
+#         dst = gr.vector_sink_f()
+#         self.tb.connect(src, dst)
+#         self.tb.run()
+#         rsl_data = dst.data()
+#         sum = 0
+#         for (u,v) in zip(trg_data, rsl_data):
+#             w = u - v
+#             sum += w * w
+#         sum /= float(len(trg_data))
+#         assert sum < 1e-6
+
+    def test_001_(self):
+        src_data = numpy.array([-1.0, 1.0, -1.0, 1.0])
+        trg_data = src_data * 0.5
+        src = gr.vector_source_f(src_data)
+        dst = gr.vector_sink_f()
+        rail = gr.rail_ff(-0.5, 0.5)
+        self.tb.connect(src, rail)
+        self.tb.connect(rail, dst)
+        self.tb.run()
+        rsl_data = dst.data()
+        sum = 0
+        for (u, v) in zip(trg_data, rsl_data):
+            w = u - v
+            sum += w * w
+        sum /= float(len(trg_data))
+        assert sum < 1e-6
+
+    def test_002_(self):
+        src_data = numpy.array([-1.0,
+                                -1.0/2.0,
+                                -1.0/3.0,
+                                -1.0/4.0,
+                                -1.0/5.0])
+        trg_data = copy.deepcopy(src_data)
+
+        src = gr.vector_source_f(src_data, False, len(src_data))
+        st = gr.stretch_ff(-1.0/5.0, len(src_data))
+        dst = gr.vector_sink_f(len(src_data))
+        self.tb.connect(src, st)
+        self.tb.connect(st, dst)
+        self.tb.run()
+        rsl_data = dst.data()
+        sum = 0
+        for (u, v) in zip(trg_data, rsl_data):
+            w = u - v
+            sum += w * w
+        sum /= float(len(trg_data))
+        assert sum < 1e-6
+        
+    def test_003_(self):
+        src_grid = (0.0, 1.0, 2.0, 3.0, 4.0)
+        trg_grid = copy.deepcopy(src_grid)
+        src_data = (0.0, 1.0, 0.0, 1.0, 0.0)
+
+        src = gr.vector_source_f(src_data, False, len(src_grid))
+        sq = gr.squash_ff(src_grid, trg_grid)
+        dst = gr.vector_sink_f(len(trg_grid))
+        self.tb.connect(src, sq)
+        self.tb.connect(sq, dst)
+        self.tb.run()
+        rsl_data = dst.data()
+        sum = 0
+        for (u, v) in zip(src_data, rsl_data):
+            w = u - v
+            sum += w * w
+        sum /= float(len(src_data))
+        assert sum < 1e-6
+
+    def test_004_(self):
+
+        n = 256
+        o = 4
+        ws = wavelet.workspace(n)
+        w = wavelet.daubechies(o)
+
+        a = numpy.arange(n)
+        b = numpy.sin(a*numpy.pi/16.0)
+        c = w.transform_forward(b, ws)
+        d = w.transform_inverse(c, ws)
+
+        src = gr.vector_source_f(b, False, n)
+        wv = gr.wavelet_ff(n, o, True)
+
+        dst = gr.vector_sink_f(n)
+        self.tb.connect(src, wv)
+        self.tb.connect(wv, dst)
+        self.tb.run()
+        e = dst.data()
+
+        sum = 0
+        for (u, v) in zip(c, e):
+            w = u - v
+            sum += w * w
+        sum /= float(len(c))
+        assert sum < 1e-6
+
+    def test_005_(self):
+
+        src_data = (1.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0)
+
+        dwav = numpy.array(src_data)
+        wvps = numpy.zeros(3)
+        # wavelet power spectrum
+        scl = 1.0/sqr(dwav[0])
+        k = 1
+        for e in range(len(wvps)):
+            wvps[e] = scl*sqr(dwav[k:k+(01<<e)]).sum()
+            k += 01<<e
+
+        src = gr.vector_source_f(src_data, False, len(src_data))
+        kon = gr.wvps_ff(len(src_data))
+        dst = gr.vector_sink_f(int(math.ceil(math.log(len(src_data), 2))))
+
+        self.tb.connect(src, kon)
+        self.tb.connect(kon, dst)
+
+        self.tb.run()
+        snk_data = dst.data()
+
+        sum = 0
+        for (u,v) in zip(snk_data, wvps):
+            w = u - v
+            sum += w * w
+        sum /= float(len(snk_data))
+        assert sum < 1e-6
+
+if __name__ == '__main__':
+    gr_unittest.main()
+