108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/*
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* iLBC - a library for the iLBC codec
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*
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* iLBC_define.h - The head guy amongst the headers
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*
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* Adapted by Steve Underwood <steveu@coppice.org> from the reference
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* iLBC code supplied in RFC3951.
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*
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* Original code Copyright (C) The Internet Society (2004).
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* All changes to produce this version Copyright (C) 2008 by Steve Underwood
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* All Rights Reserved.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: iLBC_define.h,v 1.2 2008/03/06 12:27:38 steveu Exp $
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*/
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/*! \file */
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#if !defined(_ILBC_DEFINE_H_)
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#define _ILBC_DEFINE_H_
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#include <string.h>
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#define FS 8000.0f
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#define NSUB_20MS 4
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#define NSUB_30MS 6
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#define NASUB_20MS 2
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#define NASUB_30MS 4
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#define NASUB_MAX 4
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#define SUBL 40
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#define STATE_LEN 80
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#define STATE_SHORT_LEN_30MS 58
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#define STATE_SHORT_LEN_20MS 57
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/* LPC settings */
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#define ILBC_LPC_FILTERORDER 10
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#define LPC_CHIRP_SYNTDENUM 0.9025f
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#define LPC_CHIRP_WEIGHTDENUM 0.4222f
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#define LPC_LOOKBACK 60
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#define LPC_N_20MS 1
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#define LPC_N_30MS 2
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#define LPC_N_MAX 2
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#define LPC_ASYMDIFF 20
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#define LPC_BW 60.0f
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#define LPC_WN 1.0001f
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#define LSF_NSPLIT 3
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#define LSF_NUMBER_OF_STEPS 4
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#define LPC_HALFORDER (ILBC_LPC_FILTERORDER/2)
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/* cb settings */
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#define CB_NSTAGES 3
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#define CB_EXPAND 2
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#define CB_MEML 147
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#define CB_FILTERLEN 2*4
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#define CB_HALFFILTERLEN 4
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#define CB_RESRANGE 34
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#define CB_MAXGAIN 1.3f
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/* enhancer */
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#define ENH_BLOCKL 80 /* block length */
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#define ENH_BLOCKL_HALF (ENH_BLOCKL/2)
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#define ENH_HL 3 /* 2*ENH_HL+1 is number blocks in said second sequence */
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#define ENH_SLOP 2 /* max difference estimated and correct pitch period */
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#define ENH_PLOCSL 20 /* pitch-estimates and pitch-locations buffer length */
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#define ENH_OVERHANG 2
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#define ENH_UPS0 4 /* upsampling rate */
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#define ENH_FL0 3 /* 2*FLO+1 is the length of each filter */
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#define ENH_VECTL (ENH_BLOCKL + 2*ENH_FL0)
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#define ENH_CORRDIM (2*ENH_SLOP + 1)
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#define ENH_NBLOCKS (ILBC_BLOCK_LEN_MAX/ENH_BLOCKL)
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#define ENH_NBLOCKS_EXTRA 5
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#define ENH_NBLOCKS_TOT 8 /* ENH_NBLOCKS + ENH_NBLOCKS_EXTRA */
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#define ENH_BUFL (ENH_NBLOCKS_TOT*ENH_BLOCKL)
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#define ENH_ALPHA0 0.05f
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/* Down sampling */
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#define FILTERORDER_DS 7
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#define DELAY_DS 3
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#define FACTOR_DS 2
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/* bit stream defs */
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#define STATE_BITS 3
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#define BYTE_LEN 8
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/* help parameters */
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#define FLOAT_MAX 1.0e37f
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#define EPS 2.220446049250313e-016f
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#define PI 3.14159265358979323846f
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#define MIN_SAMPLE -32768
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#define MAX_SAMPLE 32767
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#define TWO_PI 6.283185307f
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#define PI2 0.159154943f
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#endif
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/*- End of file ------------------------------------------------------------*/
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