385 lines
9.6 KiB
C
385 lines
9.6 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin
|
|
File: quant_lsp.c
|
|
LSP vector quantization
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "quant_lsp.h"
|
|
#include "os_support.h"
|
|
#include <math.h>
|
|
#ifndef M_PI
|
|
#define M_PI 3.14159265358979323846
|
|
#endif
|
|
|
|
#include "arch.h"
|
|
|
|
#ifdef BFIN_ASM
|
|
#include "quant_lsp_bfin.h"
|
|
#endif
|
|
|
|
#ifdef FIXED_POINT
|
|
|
|
#define LSP_LINEAR(i) (SHL16(i+1,11))
|
|
#define LSP_LINEAR_HIGH(i) (ADD16(MULT16_16_16(i,2560),6144))
|
|
#define LSP_DIV_256(x) (SHL16((spx_word16_t)x, 5))
|
|
#define LSP_DIV_512(x) (SHL16((spx_word16_t)x, 4))
|
|
#define LSP_DIV_1024(x) (SHL16((spx_word16_t)x, 3))
|
|
#define LSP_PI 25736
|
|
|
|
#else
|
|
|
|
#define LSP_LINEAR(i) (.25*(i)+.25)
|
|
#define LSP_LINEAR_HIGH(i) (.3125*(i)+.75)
|
|
#define LSP_SCALE 256.
|
|
#define LSP_DIV_256(x) (0.0039062*(x))
|
|
#define LSP_DIV_512(x) (0.0019531*(x))
|
|
#define LSP_DIV_1024(x) (0.00097656*(x))
|
|
#define LSP_PI M_PI
|
|
|
|
#endif
|
|
|
|
static void compute_quant_weights(spx_lsp_t *qlsp, spx_word16_t *quant_weight, int order)
|
|
{
|
|
int i;
|
|
spx_word16_t tmp1, tmp2;
|
|
for (i=0;i<order;i++)
|
|
{
|
|
if (i==0)
|
|
tmp1 = qlsp[i];
|
|
else
|
|
tmp1 = qlsp[i]-qlsp[i-1];
|
|
if (i==order-1)
|
|
tmp2 = LSP_PI-qlsp[i];
|
|
else
|
|
tmp2 = qlsp[i+1]-qlsp[i];
|
|
if (tmp2<tmp1)
|
|
tmp1 = tmp2;
|
|
#ifdef FIXED_POINT
|
|
quant_weight[i] = DIV32_16(81920,ADD16(300,tmp1));
|
|
#else
|
|
quant_weight[i] = 10/(.04+tmp1);
|
|
#endif
|
|
}
|
|
|
|
}
|
|
|
|
/* Note: x is modified*/
|
|
#ifndef OVERRIDE_LSP_QUANT
|
|
static int lsp_quant(spx_word16_t *x, const signed char *cdbk, int nbVec, int nbDim)
|
|
{
|
|
int i,j;
|
|
spx_word32_t dist;
|
|
spx_word16_t tmp;
|
|
spx_word32_t best_dist=VERY_LARGE32;
|
|
int best_id=0;
|
|
const signed char *ptr=cdbk;
|
|
for (i=0;i<nbVec;i++)
|
|
{
|
|
dist=0;
|
|
for (j=0;j<nbDim;j++)
|
|
{
|
|
tmp=SUB16(x[j],SHL16((spx_word16_t)*ptr++,5));
|
|
dist=MAC16_16(dist,tmp,tmp);
|
|
}
|
|
if (dist<best_dist)
|
|
{
|
|
best_dist=dist;
|
|
best_id=i;
|
|
}
|
|
}
|
|
|
|
for (j=0;j<nbDim;j++)
|
|
x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
|
|
|
|
return best_id;
|
|
}
|
|
#endif
|
|
|
|
/* Note: x is modified*/
|
|
#ifndef OVERRIDE_LSP_WEIGHT_QUANT
|
|
static int lsp_weight_quant(spx_word16_t *x, spx_word16_t *weight, const signed char *cdbk, int nbVec, int nbDim)
|
|
{
|
|
int i,j;
|
|
spx_word32_t dist;
|
|
spx_word16_t tmp;
|
|
spx_word32_t best_dist=VERY_LARGE32;
|
|
int best_id=0;
|
|
const signed char *ptr=cdbk;
|
|
for (i=0;i<nbVec;i++)
|
|
{
|
|
dist=0;
|
|
for (j=0;j<nbDim;j++)
|
|
{
|
|
tmp=SUB16(x[j],SHL16((spx_word16_t)*ptr++,5));
|
|
dist=MAC16_32_Q15(dist,weight[j],MULT16_16(tmp,tmp));
|
|
}
|
|
if (dist<best_dist)
|
|
{
|
|
best_dist=dist;
|
|
best_id=i;
|
|
}
|
|
}
|
|
|
|
for (j=0;j<nbDim;j++)
|
|
x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
|
|
return best_id;
|
|
}
|
|
#endif
|
|
|
|
void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
|
|
{
|
|
int i;
|
|
int id;
|
|
spx_word16_t quant_weight[10];
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=lsp[i];
|
|
|
|
compute_quant_weights(qlsp, quant_weight, order);
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=SUB16(qlsp[i],LSP_LINEAR(i));
|
|
|
|
#ifndef FIXED_POINT
|
|
for (i=0;i<order;i++)
|
|
qlsp[i] = LSP_SCALE*qlsp[i];
|
|
#endif
|
|
id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]*=2;
|
|
|
|
id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
for (i=0;i<5;i++)
|
|
qlsp[i]*=2;
|
|
|
|
id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low2, NB_CDBK_SIZE_LOW2, 5);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
for (i=5;i<10;i++)
|
|
qlsp[i]*=2;
|
|
|
|
id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high2, NB_CDBK_SIZE_HIGH2, 5);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
#ifdef FIXED_POINT
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=PSHR16(qlsp[i],2);
|
|
#else
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=qlsp[i] * .00097656;
|
|
#endif
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=lsp[i]-qlsp[i];
|
|
}
|
|
|
|
void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits)
|
|
{
|
|
int i, id;
|
|
for (i=0;i<order;i++)
|
|
lsp[i]=LSP_LINEAR(i);
|
|
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<10;i++)
|
|
lsp[i] = ADD32(lsp[i], LSP_DIV_256(cdbk_nb[id*10+i]));
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<5;i++)
|
|
lsp[i] = ADD16(lsp[i], LSP_DIV_512(cdbk_nb_low1[id*5+i]));
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<5;i++)
|
|
lsp[i] = ADD32(lsp[i], LSP_DIV_1024(cdbk_nb_low2[id*5+i]));
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<5;i++)
|
|
lsp[i+5] = ADD32(lsp[i+5], LSP_DIV_512(cdbk_nb_high1[id*5+i]));
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<5;i++)
|
|
lsp[i+5] = ADD32(lsp[i+5], LSP_DIV_1024(cdbk_nb_high2[id*5+i]));
|
|
}
|
|
|
|
|
|
void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
|
|
{
|
|
int i;
|
|
int id;
|
|
spx_word16_t quant_weight[10];
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=lsp[i];
|
|
|
|
compute_quant_weights(qlsp, quant_weight, order);
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=SUB16(qlsp[i],LSP_LINEAR(i));
|
|
#ifndef FIXED_POINT
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=qlsp[i]*LSP_SCALE;
|
|
#endif
|
|
id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]*=2;
|
|
|
|
id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
#ifdef FIXED_POINT
|
|
for (i=0;i<order;i++)
|
|
qlsp[i] = PSHR16(qlsp[i],1);
|
|
#else
|
|
for (i=0;i<order;i++)
|
|
qlsp[i] = qlsp[i]*0.0019531;
|
|
#endif
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=lsp[i]-qlsp[i];
|
|
}
|
|
|
|
void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits)
|
|
{
|
|
int i, id;
|
|
for (i=0;i<order;i++)
|
|
lsp[i]=LSP_LINEAR(i);
|
|
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<10;i++)
|
|
lsp[i] += LSP_DIV_256(cdbk_nb[id*10+i]);
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<5;i++)
|
|
lsp[i] += LSP_DIV_512(cdbk_nb_low1[id*5+i]);
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<5;i++)
|
|
lsp[i+5] += LSP_DIV_512(cdbk_nb_high1[id*5+i]);
|
|
|
|
}
|
|
|
|
|
|
#ifdef DISABLE_WIDEBAND
|
|
void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
|
|
{
|
|
speex_fatal("Wideband and Ultra-wideband are disabled");
|
|
}
|
|
void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits)
|
|
{
|
|
speex_fatal("Wideband and Ultra-wideband are disabled");
|
|
}
|
|
#else
|
|
extern const signed char high_lsp_cdbk[];
|
|
extern const signed char high_lsp_cdbk2[];
|
|
|
|
|
|
void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
|
|
{
|
|
int i;
|
|
int id;
|
|
spx_word16_t quant_weight[10];
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=lsp[i];
|
|
|
|
compute_quant_weights(qlsp, quant_weight, order);
|
|
|
|
/* quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
|
|
quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
|
|
for (i=1;i<order-1;i++)
|
|
{
|
|
tmp1 = 10/(qlsp[i]-qlsp[i-1]);
|
|
tmp2 = 10/(qlsp[i+1]-qlsp[i]);
|
|
quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
|
|
}*/
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=SUB16(qlsp[i],LSP_LINEAR_HIGH(i));
|
|
#ifndef FIXED_POINT
|
|
for (i=0;i<order;i++)
|
|
qlsp[i] = qlsp[i]*LSP_SCALE;
|
|
#endif
|
|
id = lsp_quant(qlsp, high_lsp_cdbk, 64, order);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]*=2;
|
|
|
|
id = lsp_weight_quant(qlsp, quant_weight, high_lsp_cdbk2, 64, order);
|
|
speex_bits_pack(bits, id, 6);
|
|
|
|
#ifdef FIXED_POINT
|
|
for (i=0;i<order;i++)
|
|
qlsp[i] = PSHR16(qlsp[i],1);
|
|
#else
|
|
for (i=0;i<order;i++)
|
|
qlsp[i] = qlsp[i]*0.0019531;
|
|
#endif
|
|
|
|
for (i=0;i<order;i++)
|
|
qlsp[i]=lsp[i]-qlsp[i];
|
|
}
|
|
|
|
void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits)
|
|
{
|
|
|
|
int i, id;
|
|
for (i=0;i<order;i++)
|
|
lsp[i]=LSP_LINEAR_HIGH(i);
|
|
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<order;i++)
|
|
lsp[i] += LSP_DIV_256(high_lsp_cdbk[id*order+i]);
|
|
|
|
|
|
id=speex_bits_unpack_unsigned(bits, 6);
|
|
for (i=0;i<order;i++)
|
|
lsp[i] += LSP_DIV_512(high_lsp_cdbk2[id*order+i]);
|
|
}
|
|
|
|
#endif
|
|
|