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-rw-r--r--pjmedia/src/pjmedia-codec/speex/ltp.c854
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diff --git a/pjmedia/src/pjmedia-codec/speex/ltp.c b/pjmedia/src/pjmedia-codec/speex/ltp.c
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--- a/pjmedia/src/pjmedia-codec/speex/ltp.c
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-/* Copyright (C) 2002-2006 Jean-Marc Valin
- File: ltp.c
- Long-Term Prediction functions
-
- 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 <math.h>
-#include "ltp.h"
-#include "stack_alloc.h"
-#include "filters.h"
-#include <speex/speex_bits.h>
-#include "math_approx.h"
-
-#ifndef NULL
-#define NULL 0
-#endif
-
-
-#ifdef _USE_SSE
-#include "ltp_sse.h"
-#elif defined (ARM4_ASM) || defined(ARM5E_ASM)
-#include "ltp_arm4.h"
-#elif defined (BFIN_ASM)
-#include "ltp_bfin.h"
-#endif
-
-#ifndef OVERRIDE_INNER_PROD
-spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
-{
- spx_word32_t sum=0;
- len >>= 2;
- while(len--)
- {
- spx_word32_t part=0;
- part = MAC16_16(part,*x++,*y++);
- part = MAC16_16(part,*x++,*y++);
- part = MAC16_16(part,*x++,*y++);
- part = MAC16_16(part,*x++,*y++);
- /* HINT: If you had a 40-bit accumulator, you could shift only at the end */
- sum = ADD32(sum,SHR32(part,6));
- }
- return sum;
-}
-#endif
-
-#ifndef OVERRIDE_PITCH_XCORR
-#if 0 /* HINT: Enable this for machines with enough registers (i.e. not x86) */
-void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
-{
- int i,j;
- for (i=0;i<nb_pitch;i+=4)
- {
- /* Compute correlation*/
- /*corr[nb_pitch-1-i]=inner_prod(x, _y+i, len);*/
- spx_word32_t sum1=0;
- spx_word32_t sum2=0;
- spx_word32_t sum3=0;
- spx_word32_t sum4=0;
- const spx_word16_t *y = _y+i;
- const spx_word16_t *x = _x;
- spx_word16_t y0, y1, y2, y3;
- /*y0=y[0];y1=y[1];y2=y[2];y3=y[3];*/
- y0=*y++;
- y1=*y++;
- y2=*y++;
- y3=*y++;
- for (j=0;j<len;j+=4)
- {
- spx_word32_t part1;
- spx_word32_t part2;
- spx_word32_t part3;
- spx_word32_t part4;
- part1 = MULT16_16(*x,y0);
- part2 = MULT16_16(*x,y1);
- part3 = MULT16_16(*x,y2);
- part4 = MULT16_16(*x,y3);
- x++;
- y0=*y++;
- part1 = MAC16_16(part1,*x,y1);
- part2 = MAC16_16(part2,*x,y2);
- part3 = MAC16_16(part3,*x,y3);
- part4 = MAC16_16(part4,*x,y0);
- x++;
- y1=*y++;
- part1 = MAC16_16(part1,*x,y2);
- part2 = MAC16_16(part2,*x,y3);
- part3 = MAC16_16(part3,*x,y0);
- part4 = MAC16_16(part4,*x,y1);
- x++;
- y2=*y++;
- part1 = MAC16_16(part1,*x,y3);
- part2 = MAC16_16(part2,*x,y0);
- part3 = MAC16_16(part3,*x,y1);
- part4 = MAC16_16(part4,*x,y2);
- x++;
- y3=*y++;
-
- sum1 = ADD32(sum1,SHR32(part1,6));
- sum2 = ADD32(sum2,SHR32(part2,6));
- sum3 = ADD32(sum3,SHR32(part3,6));
- sum4 = ADD32(sum4,SHR32(part4,6));
- }
- corr[nb_pitch-1-i]=sum1;
- corr[nb_pitch-2-i]=sum2;
- corr[nb_pitch-3-i]=sum3;
- corr[nb_pitch-4-i]=sum4;
- }
-
-}
-#else
-void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
-{
- int i;
- for (i=0;i<nb_pitch;i++)
- {
- /* Compute correlation*/
- corr[nb_pitch-1-i]=inner_prod(_x, _y+i, len);
- }
-
-}
-#endif
-#endif
-
-#ifndef OVERRIDE_COMPUTE_PITCH_ERROR
-static inline spx_word32_t compute_pitch_error(spx_word16_t *C, spx_word16_t *g, spx_word16_t pitch_control)
-{
- spx_word32_t sum = 0;
- sum = ADD32(sum,MULT16_16(MULT16_16_16(g[0],pitch_control),C[0]));
- sum = ADD32(sum,MULT16_16(MULT16_16_16(g[1],pitch_control),C[1]));
- sum = ADD32(sum,MULT16_16(MULT16_16_16(g[2],pitch_control),C[2]));
- sum = SUB32(sum,MULT16_16(MULT16_16_16(g[0],g[1]),C[3]));
- sum = SUB32(sum,MULT16_16(MULT16_16_16(g[2],g[1]),C[4]));
- sum = SUB32(sum,MULT16_16(MULT16_16_16(g[2],g[0]),C[5]));
- sum = SUB32(sum,MULT16_16(MULT16_16_16(g[0],g[0]),C[6]));
- sum = SUB32(sum,MULT16_16(MULT16_16_16(g[1],g[1]),C[7]));
- sum = SUB32(sum,MULT16_16(MULT16_16_16(g[2],g[2]),C[8]));
- return sum;
-}
-#endif
-
-#ifndef OVERRIDE_OPEN_LOOP_NBEST_PITCH
-void open_loop_nbest_pitch(spx_word16_t *sw, int start, int end, int len, int *pitch, spx_word16_t *gain, int N, char *stack)
-{
- int i,j,k;
- VARDECL(spx_word32_t *best_score);
- VARDECL(spx_word32_t *best_ener);
- spx_word32_t e0;
- VARDECL(spx_word32_t *corr);
- VARDECL(spx_word32_t *energy);
-#ifdef FIXED_POINT
- int scaledown = 0;
-#endif
-
- ALLOC(best_score, N, spx_word32_t);
- ALLOC(best_ener, N, spx_word32_t);
- ALLOC(corr, end-start+1, spx_word32_t);
- ALLOC(energy, end-start+2, spx_word32_t);
-
- for (i=0;i<N;i++)
- {
- best_score[i]=-1;
- best_ener[i]=0;
- pitch[i]=start;
- }
-#ifdef FIXED_POINT
- for (i=-end;i<len;i++)
- {
- if (ABS16(sw[i])>16383)
- {
- scaledown=1;
- break;
- }
- }
- /* If the weighted input is close to saturation, then we scale it down */
- if (scaledown)
- {
- for (i=-end;i<len;i++)
- {
- sw[i]=SHR16(sw[i],1);
- }
- }
-#endif
- energy[0]=inner_prod(sw-start, sw-start, len);
- e0=inner_prod(sw, sw, len);
- for (i=start;i<end;i++)
- {
- /* Update energy for next pitch*/
- energy[i-start+1] = SUB32(ADD32(energy[i-start],SHR32(MULT16_16(sw[-i-1],sw[-i-1]),6)), SHR32(MULT16_16(sw[-i+len-1],sw[-i+len-1]),6));
- if (energy[i-start+1] < 0)
- energy[i-start+1] = 0;
- }
-
- pitch_xcorr(sw, sw-end, corr, len, end-start+1, stack);
-#ifdef FIXED_POINT
- /* If we scaled weighted input down, we need to scale it up again (OK, so we've just lost the LSB, who cares?) */
- if (scaledown)
- {
- for (i=-end;i<len;i++)
- {
- sw[i]=SHL16(sw[i],1);
- }
- }
-#endif
-
- /* FIXME: Fixed-point and floating-point code should be merged */
-#ifdef FIXED_POINT
- {
- VARDECL(spx_word16_t *corr16);
- VARDECL(spx_word16_t *ener16);
- ALLOC(corr16, end-start+1, spx_word16_t);
- ALLOC(ener16, end-start+1, spx_word16_t);
- /* Normalize to 180 so we can square it and it still fits in 16 bits */
- normalize16(corr, corr16, 180, end-start+1);
- normalize16(energy, ener16, 180, end-start+1);
-
- for (i=start;i<=end;i++)
- {
- spx_word16_t tmp = MULT16_16_16(corr16[i-start],corr16[i-start]);
- /* Instead of dividing the tmp by the energy, we multiply on the other side */
- if (MULT16_16(tmp,best_ener[N-1])>MULT16_16(best_score[N-1],ADD16(1,ener16[i-start])))
- {
- /* We can safely put it last and then check */
- best_score[N-1]=tmp;
- best_ener[N-1]=ener16[i-start]+1;
- pitch[N-1]=i;
- /* Check if it comes in front of others */
- for (j=0;j<N-1;j++)
- {
- if (MULT16_16(tmp,best_ener[j])>MULT16_16(best_score[j],ADD16(1,ener16[i-start])))
- {
- for (k=N-1;k>j;k--)
- {
- best_score[k]=best_score[k-1];
- best_ener[k]=best_ener[k-1];
- pitch[k]=pitch[k-1];
- }
- best_score[j]=tmp;
- best_ener[j]=ener16[i-start]+1;
- pitch[j]=i;
- break;
- }
- }
- }
- }
- }
-#else
- for (i=start;i<=end;i++)
- {
- float tmp = corr[i-start]*corr[i-start];
- if (tmp*best_ener[N-1]>best_score[N-1]*(1+energy[i-start]))
- {
- for (j=0;j<N;j++)
- {
- if (tmp*best_ener[j]>best_score[j]*(1+energy[i-start]))
- {
- for (k=N-1;k>j;k--)
- {
- best_score[k]=best_score[k-1];
- best_ener[k]=best_ener[k-1];
- pitch[k]=pitch[k-1];
- }
- best_score[j]=tmp;
- best_ener[j]=energy[i-start]+1;
- pitch[j]=i;
- break;
- }
- }
- }
- }
-#endif
-
- /* Compute open-loop gain */
- if (gain)
- {
- for (j=0;j<N;j++)
- {
- spx_word16_t g;
- i=pitch[j];
- g = DIV32(corr[i-start], 10+SHR32(MULT16_16(spx_sqrt(e0),spx_sqrt(energy[i-start])),6));
- /* FIXME: g = max(g,corr/energy) */
- if (g<0)
- g = 0;
- gain[j]=g;
- }
- }
-}
-#endif
-
-#ifndef OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
-static int pitch_gain_search_3tap_vq(
- const signed char *gain_cdbk,
- int gain_cdbk_size,
- spx_word16_t *C16,
- spx_word16_t max_gain
-)
-{
- const signed char *ptr=gain_cdbk;
- int best_cdbk=0;
- spx_word32_t best_sum=-VERY_LARGE32;
- spx_word32_t sum=0;
- spx_word16_t g[3];
- spx_word16_t pitch_control=64;
- spx_word16_t gain_sum;
- int i;
-
- for (i=0;i<gain_cdbk_size;i++) {
-
- ptr = gain_cdbk+4*i;
- g[0]=ADD16((spx_word16_t)ptr[0],32);
- g[1]=ADD16((spx_word16_t)ptr[1],32);
- g[2]=ADD16((spx_word16_t)ptr[2],32);
- gain_sum = (spx_word16_t)ptr[3];
-
- sum = compute_pitch_error(C16, g, pitch_control);
-
- if (sum>best_sum && gain_sum<=max_gain) {
- best_sum=sum;
- best_cdbk=i;
- }
- }
-
- return best_cdbk;
-}
-#endif
-
-/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
-static spx_word32_t pitch_gain_search_3tap(
-const spx_word16_t target[], /* Target vector */
-const spx_coef_t ak[], /* LPCs for this subframe */
-const spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */
-const spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */
-spx_sig_t exc[], /* Excitation */
-const signed char *gain_cdbk,
-int gain_cdbk_size,
-int pitch, /* Pitch value */
-int p, /* Number of LPC coeffs */
-int nsf, /* Number of samples in subframe */
-SpeexBits *bits,
-char *stack,
-const spx_word16_t *exc2,
-const spx_word16_t *r,
-spx_word16_t *new_target,
-int *cdbk_index,
-int plc_tuning,
-spx_word32_t cumul_gain,
-int scaledown
-)
-{
- int i,j;
- VARDECL(spx_word16_t *tmp1);
- VARDECL(spx_word16_t *e);
- spx_word16_t *x[3];
- spx_word32_t corr[3];
- spx_word32_t A[3][3];
- spx_word16_t gain[3];
- spx_word32_t err;
- spx_word16_t max_gain=128;
- int best_cdbk=0;
-
- ALLOC(tmp1, 3*nsf, spx_word16_t);
- ALLOC(e, nsf, spx_word16_t);
-
- if (cumul_gain > 262144)
- max_gain = 31;
-
- x[0]=tmp1;
- x[1]=tmp1+nsf;
- x[2]=tmp1+2*nsf;
-
- for (j=0;j<nsf;j++)
- new_target[j] = target[j];
-
- {
- VARDECL(spx_mem_t *mm);
- int pp=pitch-1;
- ALLOC(mm, p, spx_mem_t);
- for (j=0;j<nsf;j++)
- {
- if (j-pp<0)
- e[j]=exc2[j-pp];
- else if (j-pp-pitch<0)
- e[j]=exc2[j-pp-pitch];
- else
- e[j]=0;
- }
-#ifdef FIXED_POINT
- /* Scale target and excitation down if needed (avoiding overflow) */
- if (scaledown)
- {
- for (j=0;j<nsf;j++)
- e[j] = SHR16(e[j],1);
- for (j=0;j<nsf;j++)
- new_target[j] = SHR16(new_target[j],1);
- }
-#endif
- for (j=0;j<p;j++)
- mm[j] = 0;
- iir_mem16(e, ak, e, nsf, p, mm, stack);
- for (j=0;j<p;j++)
- mm[j] = 0;
- filter_mem16(e, awk1, awk2, e, nsf, p, mm, stack);
- for (j=0;j<nsf;j++)
- x[2][j] = e[j];
- }
- for (i=1;i>=0;i--)
- {
- spx_word16_t e0=exc2[-pitch-1+i];
-#ifdef FIXED_POINT
- /* Scale excitation down if needed (avoiding overflow) */
- if (scaledown)
- e0 = SHR16(e0,1);
-#endif
- x[i][0]=MULT16_16_Q14(r[0], e0);
- for (j=0;j<nsf-1;j++)
- x[i][j+1]=ADD32(x[i+1][j],MULT16_16_P14(r[j+1], e0));
- }
-
- for (i=0;i<3;i++)
- corr[i]=inner_prod(x[i],new_target,nsf);
- for (i=0;i<3;i++)
- for (j=0;j<=i;j++)
- A[i][j]=A[j][i]=inner_prod(x[i],x[j],nsf);
-
- {
- spx_word32_t C[9];
-#ifdef FIXED_POINT
- spx_word16_t C16[9];
-#else
- spx_word16_t *C16=C;
-#endif
- C[0]=corr[2];
- C[1]=corr[1];
- C[2]=corr[0];
- C[3]=A[1][2];
- C[4]=A[0][1];
- C[5]=A[0][2];
- C[6]=A[2][2];
- C[7]=A[1][1];
- C[8]=A[0][0];
-
- /*plc_tuning *= 2;*/
- if (plc_tuning<2)
- plc_tuning=2;
- if (plc_tuning>30)
- plc_tuning=30;
-#ifdef FIXED_POINT
- C[0] = SHL32(C[0],1);
- C[1] = SHL32(C[1],1);
- C[2] = SHL32(C[2],1);
- C[3] = SHL32(C[3],1);
- C[4] = SHL32(C[4],1);
- C[5] = SHL32(C[5],1);
- C[6] = MAC16_32_Q15(C[6],MULT16_16_16(plc_tuning,655),C[6]);
- C[7] = MAC16_32_Q15(C[7],MULT16_16_16(plc_tuning,655),C[7]);
- C[8] = MAC16_32_Q15(C[8],MULT16_16_16(plc_tuning,655),C[8]);
- normalize16(C, C16, 32767, 9);
-#else
- C[6]*=.5*(1+.02*plc_tuning);
- C[7]*=.5*(1+.02*plc_tuning);
- C[8]*=.5*(1+.02*plc_tuning);
-#endif
-
- best_cdbk = pitch_gain_search_3tap_vq(gain_cdbk, gain_cdbk_size, C16, max_gain);
-
-#ifdef FIXED_POINT
- gain[0] = ADD16(32,(spx_word16_t)gain_cdbk[best_cdbk*4]);
- gain[1] = ADD16(32,(spx_word16_t)gain_cdbk[best_cdbk*4+1]);
- gain[2] = ADD16(32,(spx_word16_t)gain_cdbk[best_cdbk*4+2]);
- /*printf ("%d %d %d %d\n",gain[0],gain[1],gain[2], best_cdbk);*/
-#else
- gain[0] = 0.015625*gain_cdbk[best_cdbk*4] + .5;
- gain[1] = 0.015625*gain_cdbk[best_cdbk*4+1]+ .5;
- gain[2] = 0.015625*gain_cdbk[best_cdbk*4+2]+ .5;
-#endif
- *cdbk_index=best_cdbk;
- }
-
- for (i=0;i<nsf;i++)
- exc[i]=0;
- for (i=0;i<3;i++)
- {
- int j;
- int tmp1, tmp3;
- int pp=pitch+1-i;
- tmp1=nsf;
- if (tmp1>pp)
- tmp1=pp;
- for (j=0;j<tmp1;j++)
- exc[j]=MAC16_16(exc[j],SHL16(gain[2-i],7),exc2[j-pp]);
- tmp3=nsf;
- if (tmp3>pp+pitch)
- tmp3=pp+pitch;
- for (j=tmp1;j<tmp3;j++)
- exc[j]=MAC16_16(exc[j],SHL16(gain[2-i],7),exc2[j-pp-pitch]);
- }
- for (i=0;i<nsf;i++)
- {
- spx_word32_t tmp = ADD32(ADD32(MULT16_16(gain[0],x[2][i]),MULT16_16(gain[1],x[1][i])),
- MULT16_16(gain[2],x[0][i]));
- new_target[i] = SUB16(new_target[i], EXTRACT16(PSHR32(tmp,6)));
- }
- err = inner_prod(new_target, new_target, nsf);
-
- return err;
-}
-
-/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
-int pitch_search_3tap(
-spx_word16_t target[], /* Target vector */
-spx_word16_t *sw,
-spx_coef_t ak[], /* LPCs for this subframe */
-spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */
-spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */
-spx_sig_t exc[], /* Excitation */
-const void *par,
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-int p, /* Number of LPC coeffs */
-int nsf, /* Number of samples in subframe */
-SpeexBits *bits,
-char *stack,
-spx_word16_t *exc2,
-spx_word16_t *r,
-int complexity,
-int cdbk_offset,
-int plc_tuning,
-spx_word32_t *cumul_gain
-)
-{
- int i,j;
- int cdbk_index, pitch=0, best_gain_index=0;
- VARDECL(spx_sig_t *best_exc);
- VARDECL(spx_word16_t *new_target);
- VARDECL(spx_word16_t *best_target);
- int best_pitch=0;
- spx_word32_t err, best_err=-1;
- int N;
- const ltp_params *params;
- const signed char *gain_cdbk;
- int gain_cdbk_size;
- int scaledown=0;
-
- VARDECL(int *nbest);
-
- params = (const ltp_params*) par;
- gain_cdbk_size = 1<<params->gain_bits;
- gain_cdbk = params->gain_cdbk + 4*gain_cdbk_size*cdbk_offset;
-
- N=complexity;
- if (N>10)
- N=10;
- if (N<1)
- N=1;
-
- ALLOC(nbest, N, int);
- params = (const ltp_params*) par;
-
- if (end<start)
- {
- speex_bits_pack(bits, 0, params->pitch_bits);
- speex_bits_pack(bits, 0, params->gain_bits);
- for (i=0;i<nsf;i++)
- exc[i]=0;
- return start;
- }
-
-#ifdef FIXED_POINT
- /* Check if we need to scale everything down in the pitch search to avoid overflows */
- for (i=0;i<nsf;i++)
- {
- if (ABS16(target[i])>16383)
- {
- scaledown=1;
- break;
- }
- }
- for (i=-end;i<nsf;i++)
- {
- if (ABS16(exc2[i])>16383)
- {
- scaledown=1;
- break;
- }
- }
-#endif
- if (N>end-start+1)
- N=end-start+1;
- if (end != start)
- open_loop_nbest_pitch(sw, start, end, nsf, nbest, NULL, N, stack);
- else
- nbest[0] = start;
-
- ALLOC(best_exc, nsf, spx_sig_t);
- ALLOC(new_target, nsf, spx_word16_t);
- ALLOC(best_target, nsf, spx_word16_t);
-
- for (i=0;i<N;i++)
- {
- pitch=nbest[i];
- for (j=0;j<nsf;j++)
- exc[j]=0;
- err=pitch_gain_search_3tap(target, ak, awk1, awk2, exc, gain_cdbk, gain_cdbk_size, pitch, p, nsf,
- bits, stack, exc2, r, new_target, &cdbk_index, plc_tuning, *cumul_gain, scaledown);
- if (err<best_err || best_err<0)
- {
- for (j=0;j<nsf;j++)
- best_exc[j]=exc[j];
- for (j=0;j<nsf;j++)
- best_target[j]=new_target[j];
- best_err=err;
- best_pitch=pitch;
- best_gain_index=cdbk_index;
- }
- }
- /*printf ("pitch: %d %d\n", best_pitch, best_gain_index);*/
- speex_bits_pack(bits, best_pitch-start, params->pitch_bits);
- speex_bits_pack(bits, best_gain_index, params->gain_bits);
-#ifdef FIXED_POINT
- *cumul_gain = MULT16_32_Q13(SHL16(params->gain_cdbk[4*best_gain_index+3],8), MAX32(1024,*cumul_gain));
-#else
- *cumul_gain = 0.03125*MAX32(1024,*cumul_gain)*params->gain_cdbk[4*best_gain_index+3];
-#endif
- /*printf ("%f\n", cumul_gain);*/
- /*printf ("encode pitch: %d %d\n", best_pitch, best_gain_index);*/
- for (i=0;i<nsf;i++)
- exc[i]=best_exc[i];
- for (i=0;i<nsf;i++)
- target[i]=best_target[i];
-#ifdef FIXED_POINT
- /* Scale target back up if needed */
- if (scaledown)
- {
- for (i=0;i<nsf;i++)
- target[i]=SHL16(target[i],1);
- }
-#endif
- return pitch;
-}
-
-void pitch_unquant_3tap(
-spx_word16_t exc[], /* Input excitation */
-spx_word32_t exc_out[], /* Output excitation */
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-const void *par,
-int nsf, /* Number of samples in subframe */
-int *pitch_val,
-spx_word16_t *gain_val,
-SpeexBits *bits,
-char *stack,
-int count_lost,
-int subframe_offset,
-spx_word16_t last_pitch_gain,
-int cdbk_offset
-)
-{
- int i;
- int pitch;
- int gain_index;
- spx_word16_t gain[3];
- const signed char *gain_cdbk;
- int gain_cdbk_size;
- const ltp_params *params;
-
- params = (const ltp_params*) par;
- gain_cdbk_size = 1<<params->gain_bits;
- gain_cdbk = params->gain_cdbk + 4*gain_cdbk_size*cdbk_offset;
-
- pitch = speex_bits_unpack_unsigned(bits, params->pitch_bits);
- pitch += start;
- gain_index = speex_bits_unpack_unsigned(bits, params->gain_bits);
- /*printf ("decode pitch: %d %d\n", pitch, gain_index);*/
-#ifdef FIXED_POINT
- gain[0] = ADD16(32,(spx_word16_t)gain_cdbk[gain_index*4]);
- gain[1] = ADD16(32,(spx_word16_t)gain_cdbk[gain_index*4+1]);
- gain[2] = ADD16(32,(spx_word16_t)gain_cdbk[gain_index*4+2]);
-#else
- gain[0] = 0.015625*gain_cdbk[gain_index*4]+.5;
- gain[1] = 0.015625*gain_cdbk[gain_index*4+1]+.5;
- gain[2] = 0.015625*gain_cdbk[gain_index*4+2]+.5;
-#endif
-
- if (count_lost && pitch > subframe_offset)
- {
- spx_word16_t gain_sum;
- if (1) {
-#ifdef FIXED_POINT
- spx_word16_t tmp = count_lost < 4 ? last_pitch_gain : SHR16(last_pitch_gain,1);
- if (tmp>62)
- tmp=62;
-#else
- spx_word16_t tmp = count_lost < 4 ? last_pitch_gain : 0.5 * last_pitch_gain;
- if (tmp>.95)
- tmp=.95;
-#endif
- gain_sum = gain_3tap_to_1tap(gain);
-
- if (gain_sum > tmp)
- {
- spx_word16_t fact = DIV32_16(SHL32(EXTEND32(tmp),14),gain_sum);
- for (i=0;i<3;i++)
- gain[i]=MULT16_16_Q14(fact,gain[i]);
- }
-
- }
-
- }
-
- *pitch_val = pitch;
- gain_val[0]=gain[0];
- gain_val[1]=gain[1];
- gain_val[2]=gain[2];
- gain[0] = SHL16(gain[0],7);
- gain[1] = SHL16(gain[1],7);
- gain[2] = SHL16(gain[2],7);
- for (i=0;i<nsf;i++)
- exc_out[i]=0;
- for (i=0;i<3;i++)
- {
- int j;
- int tmp1, tmp3;
- int pp=pitch+1-i;
- tmp1=nsf;
- if (tmp1>pp)
- tmp1=pp;
- for (j=0;j<tmp1;j++)
- exc_out[j]=MAC16_16(exc_out[j],gain[2-i],exc[j-pp]);
- tmp3=nsf;
- if (tmp3>pp+pitch)
- tmp3=pp+pitch;
- for (j=tmp1;j<tmp3;j++)
- exc_out[j]=MAC16_16(exc_out[j],gain[2-i],exc[j-pp-pitch]);
- }
- /*for (i=0;i<nsf;i++)
- exc[i]=PSHR32(exc32[i],13);*/
-}
-
-
-/** Forced pitch delay and gain */
-int forced_pitch_quant(
-spx_word16_t target[], /* Target vector */
-spx_word16_t *sw,
-spx_coef_t ak[], /* LPCs for this subframe */
-spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */
-spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */
-spx_sig_t exc[], /* Excitation */
-const void *par,
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-int p, /* Number of LPC coeffs */
-int nsf, /* Number of samples in subframe */
-SpeexBits *bits,
-char *stack,
-spx_word16_t *exc2,
-spx_word16_t *r,
-int complexity,
-int cdbk_offset,
-int plc_tuning,
-spx_word32_t *cumul_gain
-)
-{
- int i;
- VARDECL(spx_sig_t *res);
- ALLOC(res, nsf, spx_sig_t);
-#ifdef FIXED_POINT
- if (pitch_coef>63)
- pitch_coef=63;
-#else
- if (pitch_coef>.99)
- pitch_coef=.99;
-#endif
- for (i=0;i<nsf&&i<start;i++)
- {
- exc[i]=MULT16_16(SHL16(pitch_coef, 7),exc2[i-start]);
- }
- for (;i<nsf;i++)
- {
- exc[i]=MULT16_32_Q15(SHL16(pitch_coef, 9),exc[i-start]);
- }
- syn_percep_zero(exc, ak, awk1, awk2, res, nsf, p, stack);
- for (i=0;i<nsf;i++)
- target[i]=EXTRACT16(SATURATE(SUB32(EXTEND32(target[i]),PSHR32(res[i],SIG_SHIFT-1)),32700));
- return start;
-}
-
-/** Unquantize forced pitch delay and gain */
-void forced_pitch_unquant(
-spx_word16_t exc[], /* Input excitation */
-spx_word32_t exc_out[], /* Output excitation */
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-const void *par,
-int nsf, /* Number of samples in subframe */
-int *pitch_val,
-spx_word16_t *gain_val,
-SpeexBits *bits,
-char *stack,
-int count_lost,
-int subframe_offset,
-spx_word16_t last_pitch_gain,
-int cdbk_offset
-)
-{
- int i;
-#ifdef FIXED_POINT
- if (pitch_coef>63)
- pitch_coef=63;
-#else
- if (pitch_coef>.99)
- pitch_coef=.99;
-#endif
- for (i=0;i<nsf;i++)
- {
- exc_out[i]=MULT16_16(exc[i-start],SHL16(pitch_coef,7));
- exc[i] = PSHR(exc_out[i],13);
- }
- *pitch_val = start;
- gain_val[0]=gain_val[2]=0;
- gain_val[1] = pitch_coef;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 22:21:08 +0000