--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/src/spandsp/private/g722.h	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,111 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * private/g722.h - The ITU G.722 codec.
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2005 Steve Underwood
+ *
+ * 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 Lesser 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.
+ *
+ * Based on a single channel G.722 codec which is:
+ *
+ *****    Copyright (c) CMU    1993      *****
+ * Computer Science, Speech Group
+ * Chengxiang Lu and Alex Hauptmann
+ *
+ * $Id: g722.h,v 1.2 2009/04/12 09:12:11 steveu Exp $
+ */
+
+
+/*! \file */
+
+#if !defined(_SPANDSP_PRIVATE_G722_H_)
+#define _SPANDSP_PRIVATE_G722_H_
+
+/*! The per band parameters for both encoding and decoding G.722 */
+typedef struct
+{
+    int16_t nb;
+    int16_t det;
+    int16_t s;
+    int16_t sz;
+    int16_t r;
+    int16_t p[2];
+    int16_t a[2];
+    int16_t b[6];
+    int16_t d[7];
+} g722_band_t;
+
+/*!
+    G.722 encode state
+ */
+struct g722_encode_state_s
+{
+    /*! TRUE if the operating in the special ITU test mode, with the band split filters
+             disabled. */
+    int itu_test_mode;
+    /*! TRUE if the G.722 data is packed */
+    int packed;
+    /*! TRUE if encode from 8k samples/second */
+    int eight_k;
+    /*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */
+    int bits_per_sample;
+
+    /*! Signal history for the QMF */
+    int16_t x[12];
+    int16_t y[12];
+    int ptr;
+
+    g722_band_t band[2];
+
+    uint32_t in_buffer;
+    int in_bits;
+    uint32_t out_buffer;
+    int out_bits;
+};
+
+/*!
+    G.722 decode state
+ */
+struct g722_decode_state_s
+{
+    /*! TRUE if the operating in the special ITU test mode, with the band split filters
+             disabled. */
+    int itu_test_mode;
+    /*! TRUE if the G.722 data is packed */
+    int packed;
+    /*! TRUE if decode to 8k samples/second */
+    int eight_k;
+    /*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */
+    int bits_per_sample;
+
+    /*! Signal history for the QMF */
+    int16_t x[12];
+    int16_t y[12];
+    int ptr;
+
+    g722_band_t band[2];
+    
+    uint32_t in_buffer;
+    int in_bits;
+    uint32_t out_buffer;
+    int out_bits;
+};
+
+#endif
+/*- End of file ------------------------------------------------------------*/