gr-vocoder: adds alaw encoder, decoder, and audio loopback example

3 files changed, 111 insertions, 0 deletions

diff --git a/gr-vocoder/include/Makefile.am b/gr-vocoder/include/Makefile.am
index 495e1a827..06c649680 100644
--- a/gr-vocoder/include/Makefile.am
+++ b/gr-vocoder/include/Makefile.am
@@ -23,6 +23,8 @@ include $(top_srcdir)/Makefile.common
 
 # C/C++ headers get installed in ${prefix}/include/gnuradio
 grinclude_HEADERS = \
+	vocoder_alaw_decode_bs.h \
+	vocoder_alaw_encode_sb.h \
 	vocoder_codec2_decode_ps.h \
 	vocoder_codec2_encode_sp.h \
 	vocoder_cvsd_decode_bs.h \
diff --git a/gr-vocoder/include/vocoder_alaw_decode_bs.h b/gr-vocoder/include/vocoder_alaw_decode_bs.h
new file mode 100644
index 000000000..b71569439
--- /dev/null
+++ b/gr-vocoder/include/vocoder_alaw_decode_bs.h
@@ -0,0 +1,55 @@
+/* -*- c++ -*- */
+/*
+ * 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.
+ */
+
+#ifndef INCLUDED_VOCODER_ALAW_DECODE_BS_H
+#define INCLUDED_VOCODER_ALAW_DECODE_BS_H
+
+#include <gr_sync_block.h>
+
+class vocoder_alaw_decode_bs;
+
+typedef boost::shared_ptr<vocoder_alaw_decode_bs> vocoder_alaw_decode_bs_sptr;
+
+vocoder_alaw_decode_bs_sptr vocoder_make_alaw_decode_bs();
+
+/*!
+ * \brief This block performs alaw audio decoding. 
+ *
+ * \ingroup vocoder_blk
+ */
+
+class vocoder_alaw_decode_bs : public gr_sync_block
+{
+private:
+  friend vocoder_alaw_decode_bs_sptr vocoder_make_alaw_decode_bs();
+
+  vocoder_alaw_decode_bs();
+
+ public:
+  ~vocoder_alaw_decode_bs();
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_VOCODER_ALAW_DECODE_BS_H */
diff --git a/gr-vocoder/include/vocoder_alaw_encode_sb.h b/gr-vocoder/include/vocoder_alaw_encode_sb.h
new file mode 100644
index 000000000..d1858d048
--- /dev/null
+++ b/gr-vocoder/include/vocoder_alaw_encode_sb.h
@@ -0,0 +1,54 @@
+/* -*- c++ -*- */
+/*
+ * 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.
+ */
+
+#ifndef INCLUDED_VOCODER_ALAW_ENCODER_SB_H
+#define INCLUDED_VOCODER_ALAW_ENCODER_SB_H
+
+#include <gr_sync_block.h>
+
+class vocoder_alaw_encode_sb;
+
+typedef boost::shared_ptr<vocoder_alaw_encode_sb> vocoder_alaw_encode_sb_sptr;
+
+vocoder_alaw_encode_sb_sptr vocoder_make_alaw_encode_sb();
+
+/*!
+ * \brief This block performs g.711 alaw audio encoding. 
+ *
+ * \ingroup vocoder_blk
+ */
+class vocoder_alaw_encode_sb : public gr_sync_block
+{
+private:
+  friend vocoder_alaw_encode_sb_sptr vocoder_make_alaw_encode_sb();
+
+  vocoder_alaw_encode_sb();
+
+ public:
+  ~vocoder_alaw_encode_sb();
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+};
+
+#endif /* INCLUDED_VOCODER_ALAW_ENCODE_SB_H */