gr-vocoder: added G.723 40K ADPCM encoder, decoder, and audio loopback example

3 files changed, 164 insertions, 0 deletions

diff --git a/gr-vocoder/lib/Makefile.am b/gr-vocoder/lib/Makefile.am
index d9e12c6a2..158347ffe 100644
--- a/gr-vocoder/lib/Makefile.am
+++ b/gr-vocoder/lib/Makefile.am
@@ -39,6 +39,8 @@ libgnuradio_vocoder_la_SOURCES = \
 	vocoder_g721_encode_sb.cc \
 	vocoder_g723_24_decode_bs.cc \
 	vocoder_g723_24_encode_sb.cc \
+	vocoder_g723_40_decode_bs.cc \
+	vocoder_g723_40_encode_sb.cc \
 	vocoder_gsm_fr_decode_ps.cc \
 	vocoder_gsm_fr_encode_sp.cc \
 	vocoder_ulaw_decode_bs.cc \
diff --git a/gr-vocoder/lib/vocoder_g723_40_decode_bs.cc b/gr-vocoder/lib/vocoder_g723_40_decode_bs.cc
new file mode 100644
index 000000000..38fd0fb5e
--- /dev/null
+++ b/gr-vocoder/lib/vocoder_g723_40_decode_bs.cc
@@ -0,0 +1,81 @@
+/* -*- 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <vocoder_g723_40_decode_bs.h>
+#include <gr_io_signature.h>
+#include <limits.h>
+
+extern "C" {
+#include "g7xx/g72x.h"
+}
+
+class vocoder_g723_40_decode_bs_impl : public vocoder_g723_40_decode_bs
+{
+public:
+
+  vocoder_g723_40_decode_bs_impl();
+  ~vocoder_g723_40_decode_bs_impl();
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+
+private:
+
+  g72x_state d_state;
+
+};
+
+vocoder_g723_40_decode_bs_sptr vocoder_make_g723_40_decode_bs()
+{
+  return gnuradio::get_initial_sptr(new vocoder_g723_40_decode_bs_impl());
+}
+
+vocoder_g723_40_decode_bs_impl::vocoder_g723_40_decode_bs_impl()
+  : gr_sync_block("vocoder_g723_40_decode_bs",
+		  gr_make_io_signature (1, 1, sizeof (unsigned char)),
+		  gr_make_io_signature (1, 1, sizeof (short)))
+{
+  g72x_init_state(&d_state);
+}
+
+vocoder_g723_40_decode_bs_impl::~vocoder_g723_40_decode_bs_impl()
+{
+}
+
+int 
+vocoder_g723_40_decode_bs_impl::work(int noutput_items,
+				     gr_vector_const_void_star &input_items,
+				     gr_vector_void_star &output_items)
+{
+  const unsigned char *in = (const unsigned char *)input_items[0];
+  short *out = (short *)output_items[0];
+
+  for(int i = 0; i < noutput_items; i++)
+    out[i] = g723_40_decoder(in[i], AUDIO_ENCODING_LINEAR, &d_state);
+  
+  return noutput_items;
+}
diff --git a/gr-vocoder/lib/vocoder_g723_40_encode_sb.cc b/gr-vocoder/lib/vocoder_g723_40_encode_sb.cc
new file mode 100644
index 000000000..1089306e7
--- /dev/null
+++ b/gr-vocoder/lib/vocoder_g723_40_encode_sb.cc
@@ -0,0 +1,81 @@
+/* -*- 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <vocoder_g723_40_encode_sb.h>
+#include <gr_io_signature.h>
+#include <limits.h>
+
+extern "C" {
+#include "g7xx/g72x.h"
+}
+
+class vocoder_g723_40_encode_sb_impl : public vocoder_g723_40_encode_sb
+{
+public:
+
+  vocoder_g723_40_encode_sb_impl();
+  ~vocoder_g723_40_encode_sb_impl();
+
+  int work(int noutput_items,
+	   gr_vector_const_void_star &input_items,
+	   gr_vector_void_star &output_items);
+
+private:
+
+  g72x_state d_state;
+
+};
+
+vocoder_g723_40_encode_sb_sptr vocoder_make_g723_40_encode_sb()
+{
+  return gnuradio::get_initial_sptr(new vocoder_g723_40_encode_sb_impl());
+}
+
+vocoder_g723_40_encode_sb_impl::vocoder_g723_40_encode_sb_impl()
+  : gr_sync_block("vocoder_g723_40_encode_sb",
+		  gr_make_io_signature (1, 1, sizeof (short)),
+		  gr_make_io_signature (1, 1, sizeof (unsigned char)))
+{
+  g72x_init_state(&d_state);
+}
+
+vocoder_g723_40_encode_sb_impl::~vocoder_g723_40_encode_sb_impl()
+{
+}
+
+int 
+vocoder_g723_40_encode_sb_impl::work(int noutput_items,
+				     gr_vector_const_void_star &input_items,
+				     gr_vector_void_star &output_items)
+{
+  const short *in = (const short *)input_items[0];
+  unsigned char *out = (unsigned char *)output_items[0];
+
+  for(int i = 0; i < noutput_items; i++)
+    out[i] = g723_40_encoder(in[i], AUDIO_ENCODING_LINEAR, &d_state);
+  
+  return noutput_items;
+}