219 lines
5.6 KiB
C
219 lines
5.6 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#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 ---------------------------------------------------------*/
|