1 files changed, 77 insertions, 0 deletions
diff --git a/gr-vocoder/lib/gsm_fr_decode_ps_impl.cc b/gr-vocoder/lib/gsm_fr_decode_ps_impl.cc
new file mode 100644
index 0000000000..2b3d11135c
--- /dev/null
+++ b/gr-vocoder/lib/gsm_fr_decode_ps_impl.cc
@@ -0,0 +1,77 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2005,2010,2013 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 "gsm_fr_decode_ps_impl.h"
+#include <gr_io_signature.h>
+#include <stdexcept>
+#include <assert.h>
+
+namespace gr {
+  namespace vocoder {
+
+    gsm_fr_decode_ps::sptr
+    gsm_fr_decode_ps::make()
+    {
+      return gnuradio::get_initial_sptr
+	(new gsm_fr_decode_ps_impl());
+    }
+
+    gsm_fr_decode_ps_impl::gsm_fr_decode_ps_impl()
+      : gr_sync_interpolator("vocoder_gsm_fr_decode_ps",
+			     gr_make_io_signature(1, 1, sizeof(gsm_frame)),
+			     gr_make_io_signature(1, 1, sizeof(short)),
+			     GSM_SAMPLES_PER_FRAME)
+    {
+      if((d_gsm = gsm_create()) == 0)
+	throw std::runtime_error("gsm_fr_decode_ps_impl: gsm_create failed");
+    }
+
+    gsm_fr_decode_ps_impl::~gsm_fr_decode_ps_impl()
+    {
+      gsm_destroy(d_gsm);
+    }
+
+    int
+    gsm_fr_decode_ps_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];
+
+      assert((noutput_items % GSM_SAMPLES_PER_FRAME) == 0);
+
+      for(int i = 0; i < noutput_items; i += GSM_SAMPLES_PER_FRAME) {
+	gsm_decode(d_gsm, const_cast<unsigned char*>(in), out);
+	in += sizeof(gsm_frame);
+	out += GSM_SAMPLES_PER_FRAME;
+      }
+
+      return noutput_items;
+    }
+
+  } /* namespace vocoder */
+} /* namespace gr */