--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/src/spandsp/private/lpc10.h	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,220 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * private/lpc10.h - LPC10 low bit rate speech codec.
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2006 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.
+ *
+ * $Id: lpc10.h,v 1.3 2009/04/12 09:12:11 steveu Exp $
+ */
+
+#if !defined(_SPANDSP_PRIVATE_LPC10_H_)
+#define _SPANDSP_PRIVATE_LPC10_H_
+
+/*!
+    LPC10 codec encoder state descriptor. This defines the state of
+    a single working instance of the LPC10 encoder.
+*/
+struct lpc10_encode_state_s
+{
+    /*! \brief ??? */
+    int error_correction;
+
+    /* State used only by function high_pass_100hz */
+    /*! \brief ??? */
+    float z11;
+    /*! \brief ??? */
+    float z21;
+    /*! \brief ??? */
+    float z12;
+    /*! \brief ??? */
+    float z22;
+    
+    /* State used by function lpc10_analyse */
+    /*! \brief ??? */
+    float inbuf[LPC10_SAMPLES_PER_FRAME*3];
+    /*! \brief ??? */
+    float pebuf[LPC10_SAMPLES_PER_FRAME*3];
+    /*! \brief ??? */
+    float lpbuf[696];
+    /*! \brief ??? */
+    float ivbuf[312];
+    /*! \brief ??? */
+    float bias;
+    /*! \brief No initial value necessary */
+    int32_t osbuf[10];
+    /*! \brief Initial value 1 */
+    int32_t osptr;
+    /*! \brief ??? */
+    int32_t obound[3];
+    /*! \brief Initial value vwin[2][0] = 307; vwin[2][1] = 462; */
+    int32_t vwin[3][2];
+    /*! \brief Initial value awin[2][0] = 307; awin[2][1] = 462; */
+    int32_t awin[3][2];
+    /*! \brief ??? */
+    int32_t voibuf[4][2];
+    /*! \brief ??? */
+    float rmsbuf[3];
+    /*! \brief ??? */
+    float rcbuf[3][10];
+    /*! \brief ??? */
+    float zpre;
+
+    /* State used by function onset */
+    /*! \brief ??? */
+    float n;
+    /*! \brief Initial value 1.0f */
+    float d__;
+    /*! \brief No initial value necessary */
+    float fpc;
+    /*! \brief ??? */
+    float l2buf[16];
+    /*! \brief ??? */
+    float l2sum1;
+    /*! \brief Initial value 1 */
+    int32_t l2ptr1;
+    /*! \brief Initial value 9 */
+    int32_t l2ptr2;
+    /*! \brief No initial value necessary */
+    int32_t lasti;
+    /*! \brief Initial value FALSE */
+    int hyst;
+
+    /* State used by function lpc10_voicing */
+    /*! \brief Initial value 20.0f */
+    float dither;
+    /*! \brief ??? */
+    float snr;
+    /*! \brief ??? */
+    float maxmin;
+    /*! \brief Initial value is probably unnecessary */
+    float voice[3][2];
+    /*! \brief ??? */
+    int32_t lbve;
+    /*! \brief ??? */
+    int32_t lbue;
+    /*! \brief ??? */
+    int32_t fbve;
+    /*! \brief ??? */
+    int32_t fbue;
+    /*! \brief ??? */
+    int32_t ofbue;
+    /*! \brief ??? */
+    int32_t sfbue;
+    /*! \brief ??? */
+    int32_t olbue;
+    /*! \brief ??? */
+    int32_t slbue;
+
+    /* State used by function dynamic_pitch_tracking */
+    /*! \brief ??? */
+    float s[60];
+    /*! \brief ??? */
+    int32_t p[2][60];
+    /*! \brief ??? */
+    int32_t ipoint;
+    /*! \brief ??? */
+    float alphax;
+
+    /* State used by function lpc10_pack */
+    /*! \brief ??? */
+    int32_t isync;
+};
+
+/*!
+    LPC10 codec decoder state descriptor. This defines the state of
+    a single working instance of the LPC10 decoder.
+*/
+struct lpc10_decode_state_s
+{
+    /*! \brief ??? */
+    int error_correction;
+
+    /* State used by function decode */
+    /*! \brief Initial value 60 */
+    int32_t iptold;
+    /*! \brief Initial value TRUE */
+    int first;
+    /*! \brief ??? */
+    int32_t ivp2h;
+    /*! \brief ??? */
+    int32_t iovoic;
+    /*! \brief Initial value 60. */
+    int32_t iavgp;
+    /*! \brief ??? */
+    int32_t erate;
+    /*! \brief ??? */
+    int32_t drc[10][3];
+    /*! \brief ??? */
+    int32_t dpit[3];
+    /*! \brief ??? */
+    int32_t drms[3];
+
+    /* State used by function synths */
+    /*! \brief ??? */
+    float buf[LPC10_SAMPLES_PER_FRAME*2];
+    /*! \brief Initial value LPC10_SAMPLES_PER_FRAME */
+    int32_t buflen;
+
+    /* State used by function pitsyn */
+    /*! \brief No initial value necessary as long as first_pitsyn is initially TRUE */
+    int32_t ivoico;
+    /*! \brief  No initial value necessary as long as first_pitsyn is initially TRUE */
+    int32_t ipito;
+    /*! \brief Initial value 1.0f */
+    float rmso;
+    /*! \brief No initial value necessary as long as first_pitsyn is initially TRUE */
+    float rco[10];
+    /*! \brief No initial value necessary as long as first_pitsyn is initially TRUE */
+    int32_t jsamp;
+    /*! \brief Initial value TRUE */
+    int first_pitsyn;
+
+    /* State used by function bsynz */
+    /*! \brief ??? */
+    int32_t ipo;
+    /*! \brief ??? */
+    float exc[166];
+    /*! \brief ??? */
+    float exc2[166];
+    /*! \brief ??? */
+    float lpi[3];
+    /*! \brief ??? */
+    float hpi[3];
+    /*! \brief ??? */
+    float rmso_bsynz;
+
+    /* State used by function random */
+    /*! \brief ??? */
+    int32_t j;
+    /*! \brief ??? */
+    int32_t k;
+    /*! \brief ??? */
+    int16_t y[5];
+
+    /* State used by function deemp */
+    /*! \brief ??? */
+    float dei[2];
+    /*! \brief ??? */
+    float deo[3];
+};
+
+#endif
+/*- End of include ---------------------------------------------------------*/