From b80502b71eb27f9329b5d5e641bd0dd5ad0d7cdd Mon Sep 17 00:00:00 2001
From: Johnathan Corgan
Date: Tue, 19 Jul 2011 09:06:58 -0700
Subject: gr-vocoder: adds ulaw encoder, decoder, and audio loopback example

---
 gr-vocoder/lib/vocoder_ulaw_encode_sb.cc | 63 ++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 gr-vocoder/lib/vocoder_ulaw_encode_sb.cc

(limited to 'gr-vocoder/lib/vocoder_ulaw_encode_sb.cc')

diff --git a/gr-vocoder/lib/vocoder_ulaw_encode_sb.cc b/gr-vocoder/lib/vocoder_ulaw_encode_sb.cc
new file mode 100644
index 000000000..19c53d72c
--- /dev/null
+++ b/gr-vocoder/lib/vocoder_ulaw_encode_sb.cc
@@ -0,0 +1,63 @@
+/* -*- 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_ulaw_encode_sb.h>
+#include <gr_io_signature.h>
+#include <limits.h>
+
+extern "C" {
+#include "g7xx/g72x.h"
+}
+
+vocoder_ulaw_encode_sb_sptr vocoder_make_ulaw_encode_sb()
+{
+  return gnuradio::get_initial_sptr(new vocoder_ulaw_encode_sb());
+}
+
+vocoder_ulaw_encode_sb::vocoder_ulaw_encode_sb()
+  : gr_sync_block("vocoder_ulaw_encode_sb",
+		  gr_make_io_signature (1, 1, sizeof(short)),
+		  gr_make_io_signature (1, 1, sizeof(unsigned char)))
+{
+}
+
+vocoder_ulaw_encode_sb::~vocoder_ulaw_encode_sb()
+{
+}
+
+int 
+vocoder_ulaw_encode_sb::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] = linear2ulaw(in[i]);
+
+  return noutput_items;
+}
-- 
cgit