Working codec2 support

libs/libcodec2/src/codec2.h

@@ -0,0 +1,43 @@
+/*---------------------------------------------------------------------------*\
+
+  FILE........: codec2.h
+  AUTHOR......: David Rowe
+  DATE CREATED: 21/8/2010
+
+  Codec2 fully quantised encoder and decoder functions.  If you want use 
+  codec2, these are the functions you need to call.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+  Copyright (C) 2010 David Rowe
+
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License version 2.1, as
+  published by the Free Software Foundation.  This program 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 Lesser General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __CODEC2__
+#define  __CODEC2__
+#include "codebook.h"
+
+#define CODEC2_SAMPLES_PER_FRAME 160
+#define CODEC2_BITS_PER_FRAME     51
+
+void *codec2_create();
+void codec2_destroy(void *codec2_state);
+void codec2_encode(void *codec2_state, unsigned char * bits, short speech_in[]);
+void codec2_decode(void *codec2_state, short speech_out[],
+      const unsigned char * bits);
+
+#endif