995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
385 lines
9.6 KiB
C
385 lines
9.6 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin
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File: quant_lsp.c
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LSP vector quantization
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "quant_lsp.h"
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#include "os_support.h"
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#include <math.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#include "arch.h"
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#ifdef BFIN_ASM
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#include "quant_lsp_bfin.h"
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#endif
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#ifdef FIXED_POINT
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#define LSP_LINEAR(i) (SHL16(i+1,11))
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#define LSP_LINEAR_HIGH(i) (ADD16(MULT16_16_16(i,2560),6144))
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#define LSP_DIV_256(x) (SHL16((spx_word16_t)x, 5))
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#define LSP_DIV_512(x) (SHL16((spx_word16_t)x, 4))
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#define LSP_DIV_1024(x) (SHL16((spx_word16_t)x, 3))
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#define LSP_PI 25736
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#else
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#define LSP_LINEAR(i) (.25*(i)+.25)
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#define LSP_LINEAR_HIGH(i) (.3125*(i)+.75)
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#define LSP_SCALE 256.
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#define LSP_DIV_256(x) (0.0039062*(x))
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#define LSP_DIV_512(x) (0.0019531*(x))
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#define LSP_DIV_1024(x) (0.00097656*(x))
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#define LSP_PI M_PI
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#endif
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static void compute_quant_weights(spx_lsp_t *qlsp, spx_word16_t *quant_weight, int order)
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{
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int i;
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spx_word16_t tmp1, tmp2;
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for (i=0;i<order;i++)
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{
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if (i==0)
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tmp1 = qlsp[i];
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else
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tmp1 = qlsp[i]-qlsp[i-1];
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if (i==order-1)
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tmp2 = LSP_PI-qlsp[i];
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else
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tmp2 = qlsp[i+1]-qlsp[i];
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if (tmp2<tmp1)
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tmp1 = tmp2;
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#ifdef FIXED_POINT
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quant_weight[i] = DIV32_16(81920,ADD16(300,tmp1));
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#else
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quant_weight[i] = 10/(.04+tmp1);
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#endif
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}
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}
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/* Note: x is modified*/
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#ifndef OVERRIDE_LSP_QUANT
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static int lsp_quant(spx_word16_t *x, const signed char *cdbk, int nbVec, int nbDim)
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{
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int i,j;
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spx_word32_t dist;
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spx_word16_t tmp;
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spx_word32_t best_dist=VERY_LARGE32;
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int best_id=0;
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const signed char *ptr=cdbk;
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for (i=0;i<nbVec;i++)
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{
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dist=0;
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for (j=0;j<nbDim;j++)
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{
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tmp=SUB16(x[j],SHL16((spx_word16_t)*ptr++,5));
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dist=MAC16_16(dist,tmp,tmp);
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}
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if (dist<best_dist)
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{
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best_dist=dist;
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best_id=i;
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}
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}
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for (j=0;j<nbDim;j++)
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x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
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return best_id;
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}
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#endif
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/* Note: x is modified*/
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#ifndef OVERRIDE_LSP_WEIGHT_QUANT
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static int lsp_weight_quant(spx_word16_t *x, spx_word16_t *weight, const signed char *cdbk, int nbVec, int nbDim)
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{
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int i,j;
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spx_word32_t dist;
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spx_word16_t tmp;
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spx_word32_t best_dist=VERY_LARGE32;
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int best_id=0;
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const signed char *ptr=cdbk;
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for (i=0;i<nbVec;i++)
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{
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dist=0;
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for (j=0;j<nbDim;j++)
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{
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tmp=SUB16(x[j],SHL16((spx_word16_t)*ptr++,5));
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dist=MAC16_32_Q15(dist,weight[j],MULT16_16(tmp,tmp));
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}
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if (dist<best_dist)
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{
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best_dist=dist;
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best_id=i;
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}
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}
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for (j=0;j<nbDim;j++)
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x[j] = SUB16(x[j],SHL16((spx_word16_t)cdbk[best_id*nbDim+j],5));
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return best_id;
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}
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#endif
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void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
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{
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int i;
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int id;
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spx_word16_t quant_weight[10];
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for (i=0;i<order;i++)
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qlsp[i]=lsp[i];
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compute_quant_weights(qlsp, quant_weight, order);
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for (i=0;i<order;i++)
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qlsp[i]=SUB16(qlsp[i],LSP_LINEAR(i));
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#ifndef FIXED_POINT
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for (i=0;i<order;i++)
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qlsp[i] = LSP_SCALE*qlsp[i];
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#endif
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id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
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speex_bits_pack(bits, id, 6);
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for (i=0;i<order;i++)
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qlsp[i]*=2;
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id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
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speex_bits_pack(bits, id, 6);
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for (i=0;i<5;i++)
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qlsp[i]*=2;
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id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low2, NB_CDBK_SIZE_LOW2, 5);
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speex_bits_pack(bits, id, 6);
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id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
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speex_bits_pack(bits, id, 6);
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for (i=5;i<10;i++)
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qlsp[i]*=2;
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id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high2, NB_CDBK_SIZE_HIGH2, 5);
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speex_bits_pack(bits, id, 6);
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#ifdef FIXED_POINT
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for (i=0;i<order;i++)
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qlsp[i]=PSHR16(qlsp[i],2);
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#else
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for (i=0;i<order;i++)
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qlsp[i]=qlsp[i] * .00097656;
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#endif
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for (i=0;i<order;i++)
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qlsp[i]=lsp[i]-qlsp[i];
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}
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void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits)
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{
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int i, id;
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for (i=0;i<order;i++)
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lsp[i]=LSP_LINEAR(i);
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<10;i++)
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lsp[i] = ADD32(lsp[i], LSP_DIV_256(cdbk_nb[id*10+i]));
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<5;i++)
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lsp[i] = ADD16(lsp[i], LSP_DIV_512(cdbk_nb_low1[id*5+i]));
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<5;i++)
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lsp[i] = ADD32(lsp[i], LSP_DIV_1024(cdbk_nb_low2[id*5+i]));
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<5;i++)
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lsp[i+5] = ADD32(lsp[i+5], LSP_DIV_512(cdbk_nb_high1[id*5+i]));
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<5;i++)
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lsp[i+5] = ADD32(lsp[i+5], LSP_DIV_1024(cdbk_nb_high2[id*5+i]));
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}
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void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
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{
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int i;
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int id;
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spx_word16_t quant_weight[10];
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for (i=0;i<order;i++)
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qlsp[i]=lsp[i];
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compute_quant_weights(qlsp, quant_weight, order);
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for (i=0;i<order;i++)
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qlsp[i]=SUB16(qlsp[i],LSP_LINEAR(i));
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#ifndef FIXED_POINT
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for (i=0;i<order;i++)
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qlsp[i]=qlsp[i]*LSP_SCALE;
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#endif
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id = lsp_quant(qlsp, cdbk_nb, NB_CDBK_SIZE, order);
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speex_bits_pack(bits, id, 6);
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for (i=0;i<order;i++)
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qlsp[i]*=2;
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id = lsp_weight_quant(qlsp, quant_weight, cdbk_nb_low1, NB_CDBK_SIZE_LOW1, 5);
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speex_bits_pack(bits, id, 6);
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id = lsp_weight_quant(qlsp+5, quant_weight+5, cdbk_nb_high1, NB_CDBK_SIZE_HIGH1, 5);
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speex_bits_pack(bits, id, 6);
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#ifdef FIXED_POINT
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for (i=0;i<order;i++)
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qlsp[i] = PSHR16(qlsp[i],1);
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#else
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for (i=0;i<order;i++)
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qlsp[i] = qlsp[i]*0.0019531;
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#endif
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for (i=0;i<order;i++)
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qlsp[i]=lsp[i]-qlsp[i];
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}
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void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits)
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{
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int i, id;
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for (i=0;i<order;i++)
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lsp[i]=LSP_LINEAR(i);
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<10;i++)
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lsp[i] += LSP_DIV_256(cdbk_nb[id*10+i]);
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<5;i++)
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lsp[i] += LSP_DIV_512(cdbk_nb_low1[id*5+i]);
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<5;i++)
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lsp[i+5] += LSP_DIV_512(cdbk_nb_high1[id*5+i]);
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}
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#ifdef DISABLE_WIDEBAND
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void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
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{
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speex_fatal("Wideband and Ultra-wideband are disabled");
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}
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void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits)
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{
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speex_fatal("Wideband and Ultra-wideband are disabled");
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}
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#else
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extern const signed char high_lsp_cdbk[];
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extern const signed char high_lsp_cdbk2[];
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void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits)
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{
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int i;
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int id;
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spx_word16_t quant_weight[10];
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for (i=0;i<order;i++)
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qlsp[i]=lsp[i];
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compute_quant_weights(qlsp, quant_weight, order);
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/* quant_weight[0] = 10/(qlsp[1]-qlsp[0]);
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quant_weight[order-1] = 10/(qlsp[order-1]-qlsp[order-2]);
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for (i=1;i<order-1;i++)
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{
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tmp1 = 10/(qlsp[i]-qlsp[i-1]);
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tmp2 = 10/(qlsp[i+1]-qlsp[i]);
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quant_weight[i] = tmp1 > tmp2 ? tmp1 : tmp2;
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}*/
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for (i=0;i<order;i++)
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qlsp[i]=SUB16(qlsp[i],LSP_LINEAR_HIGH(i));
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#ifndef FIXED_POINT
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for (i=0;i<order;i++)
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qlsp[i] = qlsp[i]*LSP_SCALE;
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#endif
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id = lsp_quant(qlsp, high_lsp_cdbk, 64, order);
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speex_bits_pack(bits, id, 6);
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for (i=0;i<order;i++)
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qlsp[i]*=2;
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id = lsp_weight_quant(qlsp, quant_weight, high_lsp_cdbk2, 64, order);
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speex_bits_pack(bits, id, 6);
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#ifdef FIXED_POINT
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for (i=0;i<order;i++)
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qlsp[i] = PSHR16(qlsp[i],1);
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#else
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for (i=0;i<order;i++)
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qlsp[i] = qlsp[i]*0.0019531;
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#endif
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for (i=0;i<order;i++)
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qlsp[i]=lsp[i]-qlsp[i];
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}
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void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits)
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{
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int i, id;
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for (i=0;i<order;i++)
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lsp[i]=LSP_LINEAR_HIGH(i);
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<order;i++)
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lsp[i] += LSP_DIV_256(high_lsp_cdbk[id*order+i]);
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id=speex_bits_unpack_unsigned(bits, 6);
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for (i=0;i<order;i++)
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lsp[i] += LSP_DIV_512(high_lsp_cdbk2[id*order+i]);
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}
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#endif
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