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+/* 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
+