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/*****************************************************************************/
/* BroadVoice(R)16 (BV16) Fixed-Point ANSI-C Source Code */
/* Revision Date: November 13, 2009 */
/* Version 1.1 */
/*****************************************************************************/
/*****************************************************************************/
/* Copyright 2000-2009 Broadcom Corporation */
/* */
/* This software is provided under the GNU Lesser General Public License, */
/* version 2.1, as published by the Free Software Foundation ("LGPL"). */
/* This program is distributed in the hope that it will be useful, but */
/* WITHOUT ANY SUPPORT OR WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the LGPL for */
/* more details. A copy of the LGPL is available at */
/* http://www.broadcom.com/licenses/LGPLv2.1.php, */
/* or by writing to the Free Software Foundation, Inc., */
/* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*****************************************************************************/
/*****************************************************************************
bv16externs.c : BV16 Fixed-Point externs
$Log$
******************************************************************************/
/* POINTERS */
extern Word16 winl[WINSZ];
extern Word16 sstwinl_h[];
extern Word16 sstwinl_l[];
extern Word16 gfsz[];
extern Word16 gfsp[];
extern Word16 idxord[];
extern Word16 hpfa[];
extern Word16 hpfb[];
extern Word16 adf_h[];
extern Word16 adf_l[];
extern Word16 bdf[];
extern Word16 x[];
extern Word16 x2[];
extern Word16 MPTH[];
/* LSP Quantization */
extern Word16 lspecb1[];
extern Word16 lspecb2[];
extern Word16 lspmean[];
extern Word16 lspp[];
/* Log-Gain Quantization */
extern Word16 lgpecb[];
extern Word16 lgp[];
extern Word16 lgmean;
/* Log-Gain Limitation */
extern Word16 lgclimit[];
/* Excitation Codebook */
extern Word16 cccb[];
/* Function Prototypes */
Word32 estlevel(
Word32 lg,
Word32 *level,
Word32 *lmax,
Word32 *lmin,
Word32 *lmean,
Word32 *x1,
Word16 ngfae,
Word16 nggalgc,
Word16 *estl_alpha_min); /* Q15 */
void excdec_w_synth(
Word16 *xq, /* (o) Q0 quantized signal vector */
Word16 *ltsym, /* (i/o) Q16 quantized excitation signal vector */
Word16 *stsym, /* (i/o) Q0 short-term predictor memory */
Word16 *idx, /* (o) quantizer codebook index for uq[] vector */
Word16 *b, /* (i) Q15 coefficient of 3-tap pitch predictor */
Word16 *cb, /* (i) Q0 codebook */
Word16 pp, /* pitch period (# of 8 kHz samples) */
Word16 *aq, /* (i) Q12 short-term predictor coefficients */
Word16 gain_exp, /* gain_exp of current sub-frame */
Word32 *EE
);
Word32 gaindec(
Word32 *lgq, /* Q25 */
Word16 gidx,
Word16 *lgpm, /* Q11 */
Word32 *prevlg, /* Q25 */
Word32 level, /* Q25 */
Word16 *nggalgc,
Word32 *lg_el);
void gainplc(Word32 E, Word16 *lgeqm, Word32 *lgqm);
void lspdec(
Word16 *lspq, /* Q15 */
Word16 *lspidx,
Word16 *lsppm, /* Q15 */
Word16 *lspqlast);
void lspdecplc(
Word16 *lspq, /* Q15 */
Word16 *lsppm); /* Q15 */
Word16 coarsepitch(
Word16 *xw, /* (i) Q1 weighted low-band signal frame */
struct BV16_Encoder_State *c); /* (i/o) coder state */
Word16 refinepitch(
Word16 *x,
Word16 cpp,
Word16 *ppt);
Word16 pitchtapquan(
Word16 *x,
Word16 pp,
Word16 *b,
Word32 *re);
void excquan(
Word16 *idx, /* quantizer codebook index for uq[] vector */
Word16 *s, /* (i) Q0 input signal vector */
Word16 *aq, /* (i) Q12 noise feedback filter coefficient array */
Word16 *fsz, /* (i) Q12 short-term noise feedback filter - numerator */
Word16 *fsp, /* (i) Q12 short-term noise feedback filter - denominator */
Word16 *b, /* (i) Q15 coefficient of 3-tap pitch predictor */
Word16 beta, /* (i) Q13 coefficient of pitch feedback filter */
Word16 *stsym, /* (i/o) Q0 filter memory */
Word16 *ltsym, /* (i/0) Q0 long-term synthesis filter memory */
Word16 *ltnfm, /* (i/o) Q0 long-term noise feedback filter memory */
Word16 *stnfz, /* (i/o) Q0 filter memory */
Word16 *stnfp, /* (i/o) Q0 filter memory */
Word16 *cb, /* (i) scalar quantizer codebook - normalized by gain_exp */
Word16 pp, /* pitch period (# of 8 kHz samples) */
Word16 gain_exp
);
Word16 gainquan(
Word32 *gainq, /* Q18 */
Word32 *ee, /* Q3 */
Word16 *lgpm, /* Q11 */
Word32 *prevlg, /* Q25 */
Word32 level); /* Q25 */
void lspquan(
Word16 *lspq,
Word16 *lspidx,
Word16 *lsp,
Word16 *lsppm);
void preprocess(
struct BV16_Encoder_State *cs,
Word16 *output, /* (o) Q0 output signal, less factor 1.5 */
Word16 *input, /* (i) Q0 input signal */
Word16 N); /* length of signal */
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