diff options
Diffstat (limited to 'gr-vocoder/python')
| -rw-r--r-- | gr-vocoder/python/.gitignore | 9 | ||||
| -rw-r--r-- | gr-vocoder/python/Makefile.am | 42 | ||||
| -rw-r--r-- | gr-vocoder/python/__init__.py | 28 | ||||
| -rw-r--r-- | gr-vocoder/python/cvsd.py | 86 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_alaw_vocoder.py | 39 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_codec2_vocoder.py | 39 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_cvsd_vocoder.py | 123 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_g721_vocoder.py | 39 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_g723_24_vocoder.py | 39 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_g723_40_vocoder.py | 39 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_gsm_full_rate.py | 39 | ||||
| -rwxr-xr-x | gr-vocoder/python/qa_ulaw_vocoder.py | 39 | ||||
| -rw-r--r-- | gr-vocoder/python/run_tests.in | 10 |
13 files changed, 571 insertions, 0 deletions
diff --git a/gr-vocoder/python/.gitignore b/gr-vocoder/python/.gitignore new file mode 100644 index 000000000..bf03975bb --- /dev/null +++ b/gr-vocoder/python/.gitignore @@ -0,0 +1,9 @@ +/Makefile +/Makefile.in +/.deps +/.libs +/*.la +/*.lo +/*.pyc +/*.pyo +/run_tests diff --git a/gr-vocoder/python/Makefile.am b/gr-vocoder/python/Makefile.am new file mode 100644 index 000000000..4b6146ca7 --- /dev/null +++ b/gr-vocoder/python/Makefile.am @@ -0,0 +1,42 @@ +# +# Copyright 2011 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. +# + +include $(top_srcdir)/Makefile.common + +vocoderdir = $(grpythondir)/vocoder + +TESTS = run_tests + +noinst_PYTHON = \ + qa_alaw_vocoder.py \ + qa_codec2_vocoder.py \ + qa_cvsd_vocoder.py \ + qa_g721_vocoder.py \ + qa_g723_24_vocoder.py \ + qa_g723_40_vocoder.py \ + qa_gsm_full_rate.py \ + qa_ulaw_vocoder.py + +vocoder_PYTHON = \ + __init__.py \ + cvsd.py + +EXTRA_DIST += run_tests.in diff --git a/gr-vocoder/python/__init__.py b/gr-vocoder/python/__init__.py new file mode 100644 index 000000000..c5477b2be --- /dev/null +++ b/gr-vocoder/python/__init__.py @@ -0,0 +1,28 @@ +# +# Copyright 2011 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. +# + +''' +This is the gr-vocoder package. This package includes the various +vocoder blocks in GNU Radio. +''' + +from vocoder_swig import * +from cvsd import * diff --git a/gr-vocoder/python/cvsd.py b/gr-vocoder/python/cvsd.py new file mode 100644 index 000000000..27b06ddeb --- /dev/null +++ b/gr-vocoder/python/cvsd.py @@ -0,0 +1,86 @@ +#!/usr/bin/env python +# +# Copyright 2007,2011 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 vocoder_swig + +class cvsd_encode_fb(gr.hier_block2): + ''' + This is a wrapper for the CVSD encoder that performs interpolation and filtering + necessary to work with the vocoding. It converts an incoming float (+-1) to a short, scales + it (to 32000; slightly below the maximum value), interpolates it, and then vocodes it. + + The incoming sampling rate can be anything, though, of course, the higher the sampling rate and the + higher the interpolation rate are, the better the sound quality. + ''' + + def __init__(self, resample=8, bw=0.5): + ''' + When using the CVSD vocoder, appropriate sampling rates are from 8k to 64k with resampling rates + from 1 to 8. A rate of 8k with a resampling rate of 8 provides a good quality signal. + ''' + + gr.hier_block2.__init__(self, "cvsd_encode", + gr.io_signature(1, 1, gr.sizeof_float), # Input signature + gr.io_signature(1, 1, gr.sizeof_char)) # Output signature + + scale_factor = 32000.0 + self.interp = resample + + src_scale = gr.multiply_const_ff(scale_factor) + taps = gr.firdes.low_pass(self.interp, self.interp, bw, 2*bw) + interp = gr.interp_fir_filter_fff(self.interp, taps) + f2s = gr.float_to_short() + enc = vocoder_swig.cvsd_encode_sb() + + self.connect(self, src_scale, interp, f2s, enc, self) + + +class cvsd_decode_bf(gr.hier_block2): + ''' + This is a wrapper for the CVSD decoder that performs decimation and filtering + necessary to work with the vocoding. It converts an incoming CVSD-encoded short to a float, decodes it + to a float, decimates it, and scales it (by 32000; slightly below the maximum value to avoid clipping). + + The sampling rate can be anything, though, of course, the higher the sampling rate and the + higher the interpolation rate are, the better the sound quality. + ''' + + def __init__(self, resample=8, bw=0.5): + ''' + When using the CVSD vocoder, appropriate sampling rates are from 8k to 64k with resampling rates + from 1 to 8. A rate of 8k with a resampling rate of 8 provides a good quality signal. + ''' + gr.hier_block2.__init__(self, "cvsd_decode", + gr.io_signature(1, 1, gr.sizeof_char), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + + scale_factor = 32000.0 + self.decim = resample + + dec = vocoder_swig.cvsd_decode_bs() + s2f = gr.short_to_float() + taps = gr.firdes.low_pass(1, 1, bw, 2*bw) + decim = gr.fir_filter_fff(self.decim, taps) + sink_scale = gr.multiply_const_ff(1.0/scale_factor) + + self.connect(self, dec, s2f, decim, sink_scale, self) diff --git a/gr-vocoder/python/qa_alaw_vocoder.py b/gr-vocoder/python/qa_alaw_vocoder.py new file mode 100755 index 000000000..b7b937138 --- /dev/null +++ b/gr-vocoder/python/qa_alaw_vocoder.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2011 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, gr_unittest +from vocoder_swig import * + +class test_alaw_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + enc = alaw_encode_sb(); + dec = alaw_decode_bs(); + +if __name__ == '__main__': + gr_unittest.run(test_alaw_vocoder, "test_alaw_vocoder.xml") diff --git a/gr-vocoder/python/qa_codec2_vocoder.py b/gr-vocoder/python/qa_codec2_vocoder.py new file mode 100755 index 000000000..699bb7dda --- /dev/null +++ b/gr-vocoder/python/qa_codec2_vocoder.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2011 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, gr_unittest +from vocoder_swig import * + +class test_codec2_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + raw_enc = codec2_encode_sp(); + raw_dec = codec2_decode_ps(); + +if __name__ == '__main__': + gr_unittest.run(test_codec2_vocoder, "test_codec2_vocoder.xml") diff --git a/gr-vocoder/python/qa_cvsd_vocoder.py b/gr-vocoder/python/qa_cvsd_vocoder.py new file mode 100755 index 000000000..53045e4a9 --- /dev/null +++ b/gr-vocoder/python/qa_cvsd_vocoder.py @@ -0,0 +1,123 @@ +#!/usr/bin/env python +# +# Copyright 2007,2010,2011 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, gr_unittest +from vocoder_swig import * +from cvsd import * + +class test_cvsd_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + raw_enc = cvsd_encode_sb(); + raw_dec = cvsd_decode_bs(); + hb_enc = cvsd_encode_fb(); + hb_dec = cvsd_decode_bf(); + + + """ Disable for now + def test01(self): + sample_rate = 8000 + scale_factor = 32000 + + expected_data = (6.9670547250243192e-21, -2.4088578356895596e-05, + -5.1261918997624889e-05, 7.2410854045301676e-05, + 8.444241393590346e-05, -1.2537107068055775e-05, + 0.00024186755763366818, -0.00060463894624263048, + 0.00064864184241741896, 0.010409165173768997, + 0.0087582804262638092, 0.017965050414204597, + 0.010722399689257145, 0.006602009292691946, + 0.02213001623749733, 0.0079685859382152557, + 0.033707316964864731, 0.027021972462534904, + 0.0086071854457259178, 0.0081678871065378189, + 0.039343506097793579, 0.030671956017613411, + 0.029626710340380669, 0.020126519724726677, + 0.023636780679225922, 0.0064640454947948456, + -0.0038861562497913837, 0.0021134600974619389, + -0.0088051930069923401, -0.00023228264763019979, + -0.033737499266862869, -0.033141419291496277, + -0.037145044654607773, -0.0080892946571111679, + -0.077117636799812317, -0.078382067382335663, + -0.055503919720649719, -0.019355267286300659, + -0.022441385313868523, -0.073706060647964478, + -0.054677654057741165, -0.047119375318288803, + -0.044418536126613617, -0.036084383726119995, + -0.0206278245896101, -0.031200021505355835, + -0.0004070434661116451, 0.0006594572332687676, + -0.016584658995270729, 0.07387717068195343, + -0.0063191778026521206, 0.051200628280639648, + -0.029480356723070145, 0.05176771804690361, + 0.038578659296035767, 0.026550088077783585, + 0.067103870213031769, 0.001888439292088151, + 0.28141644597053528, 0.49543789029121399, + 0.6626054048538208, 0.79180729389190674, + 0.89210402965545654, 0.96999943256378174, + 1.0261462926864624, 1.0267977714538574, + 1.0251555442810059, 1.0265737771987915, + 1.0278496742248535, 1.0208886861801147, + 1.0325057506561279, 0.91415292024612427, + 0.83941859006881714, 0.67373806238174438, + 0.51683622598648071, 0.38949671387672424, + 0.16016888618469238, 0.049505095928907394, + -0.16699212789535522, -0.26886492967605591, + -0.49256673455238342, -0.59178370237350464, + -0.73317724466323853, -0.78922677040100098, + -0.88782668113708496, -0.96708977222442627, + -0.96490746736526489, -0.94962418079376221, + -0.94716215133666992, -0.93755108118057251, + -0.84852480888366699, -0.80485564470291138, + -0.69762390851974487, -0.58398681879043579, + -0.45891636610031128, -0.29681697487831116, + -0.16035343706607819, 0.014823081903159618, + 0.16282452642917633, 0.33802291750907898) + + src = gr.sig_source_f(sample_rate, gr.GR_SIN_WAVE, 200, 1, 0) + head = gr.head(gr.sizeof_float, 100) + src_scale = gr.multiply_const_ff(scale_factor) + + interp = blks2.rational_resampler_fff(8, 1) + f2s = gr.float_to_short () + + enc = cvsd_vocoder.encode_sb() + dec = cvsd_vocoder.decode_bs() + + s2f = gr.short_to_float () + decim = blks2.rational_resampler_fff(1, 8) + + sink_scale = gr.multiply_const_ff(1.0/scale_factor) + sink = gr.vector_sink_f() + + self.tb.connect(src, src_scale, interp, f2s, enc) + self.tb.connect(enc, dec, s2f, decim, sink_scale, head, sink) + self.tb.run() + print sink.data() + + self.assertFloatTuplesAlmostEqual (expected_data, sink.data(), 5) + """ + +if __name__ == '__main__': + gr_unittest.run(test_cvsd_vocoder, "test_cvsd_vocoder.xml") diff --git a/gr-vocoder/python/qa_g721_vocoder.py b/gr-vocoder/python/qa_g721_vocoder.py new file mode 100755 index 000000000..79cc944f3 --- /dev/null +++ b/gr-vocoder/python/qa_g721_vocoder.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2011 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, gr_unittest +from vocoder_swig import * + +class test_g721_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + enc = g721_encode_sb(); + dec = g721_decode_bs(); + +if __name__ == '__main__': + gr_unittest.run(test_g721_vocoder, "test_g721_vocoder.xml") diff --git a/gr-vocoder/python/qa_g723_24_vocoder.py b/gr-vocoder/python/qa_g723_24_vocoder.py new file mode 100755 index 000000000..ccf215f46 --- /dev/null +++ b/gr-vocoder/python/qa_g723_24_vocoder.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2011 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, gr_unittest +from vocoder_swig import * + +class test_g723_24_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + enc = g723_24_encode_sb(); + dec = g723_24_decode_bs(); + +if __name__ == '__main__': + gr_unittest.run(test_g723_24_vocoder, "test_g723_24_vocoder.xml") diff --git a/gr-vocoder/python/qa_g723_40_vocoder.py b/gr-vocoder/python/qa_g723_40_vocoder.py new file mode 100755 index 000000000..9e6a52339 --- /dev/null +++ b/gr-vocoder/python/qa_g723_40_vocoder.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2011 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, gr_unittest +from vocoder_swig import * + +class test_g723_40_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + enc = g723_40_encode_sb(); + dec = g723_40_decode_bs(); + +if __name__ == '__main__': + gr_unittest.run(test_g723_40_vocoder, "test_g723_40_vocoder.xml") diff --git a/gr-vocoder/python/qa_gsm_full_rate.py b/gr-vocoder/python/qa_gsm_full_rate.py new file mode 100755 index 000000000..f9125905c --- /dev/null +++ b/gr-vocoder/python/qa_gsm_full_rate.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2004,2007,2010 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, gr_unittest +import vocoder_swig + +class test_gsm_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block () + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + enc = vocoder_swig.gsm_fr_encode_sp(); + dec = vocoder_swig.gsm_fr_decode_ps(); + +if __name__ == '__main__': + gr_unittest.run(test_gsm_vocoder, "test_gsm_vocoder.xml") diff --git a/gr-vocoder/python/qa_ulaw_vocoder.py b/gr-vocoder/python/qa_ulaw_vocoder.py new file mode 100755 index 000000000..0e201638c --- /dev/null +++ b/gr-vocoder/python/qa_ulaw_vocoder.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python +# +# Copyright 2011 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, gr_unittest +from vocoder_swig import * + +class test_ulaw_vocoder (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block() + + def tearDown (self): + self.tb = None + + def test001_module_load (self): + enc = ulaw_encode_sb(); + dec = ulaw_decode_bs(); + +if __name__ == '__main__': + gr_unittest.run(test_ulaw_vocoder, "test_ulaw_vocoder.xml") diff --git a/gr-vocoder/python/run_tests.in b/gr-vocoder/python/run_tests.in new file mode 100644 index 000000000..e0c61a6b4 --- /dev/null +++ b/gr-vocoder/python/run_tests.in @@ -0,0 +1,10 @@ +#!/bin/sh + +# 1st parameter is absolute path to component source directory +# 2nd parameter is absolute path to component build directory +# 3rd parameter is path to Python QA directory + +@top_builddir@/run_tests.sh \ + @abs_top_srcdir@/gr-vocoder \ + @abs_top_builddir@/gr-vocoder \ + @srcdir@ |