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-rw-r--r--pjmedia/src/pjmedia-codec/speex/ltp.c850
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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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+/* Copyright (C) 2002 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
+static 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) */
+static 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
+static 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_word32_t *C, spx_word16_t *g, spx_word16_t pitch_control)
+{
+ spx_word32_t sum = 0;
+ sum = ADD32(sum,MULT16_32_Q15(MULT16_16_16(g[0],pitch_control),C[0]));
+ sum = ADD32(sum,MULT16_32_Q15(MULT16_16_16(g[1],pitch_control),C[1]));
+ sum = ADD32(sum,MULT16_32_Q15(MULT16_16_16(g[2],pitch_control),C[2]));
+ sum = SUB32(sum,MULT16_32_Q15(MULT16_16_16(g[0],g[1]),C[3]));
+ sum = SUB32(sum,MULT16_32_Q15(MULT16_16_16(g[2],g[1]),C[4]));
+ sum = SUB32(sum,MULT16_32_Q15(MULT16_16_16(g[2],g[0]),C[5]));
+ sum = SUB32(sum,MULT16_32_Q15(MULT16_16_16(g[0],g[0]),C[6]));
+ sum = SUB32(sum,MULT16_32_Q15(MULT16_16_16(g[1],g[1]),C[7]));
+ sum = SUB32(sum,MULT16_32_Q15(MULT16_16_16(g[2],g[2]),C[8]));
+ return sum;
+}
+#endif
+
+void open_loop_nbest_pitch(spx_sig_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);
+ spx_word32_t e0;
+ VARDECL(spx_word32_t *corr);
+ VARDECL(spx_word32_t *energy);
+ VARDECL(spx_word32_t *score);
+ VARDECL(spx_word16_t *swn2);
+ spx_word16_t *swn;
+
+ ALLOC(best_score, N, spx_word32_t);
+ ALLOC(corr, end-start+1, spx_word32_t);
+ ALLOC(energy, end-start+2, spx_word32_t);
+ ALLOC(score, end-start+1, spx_word32_t);
+
+#ifdef FIXED_POINT
+ ALLOC(swn2, end+len, spx_word16_t);
+ normalize16(sw-end, swn2, 16384, end+len);
+ swn = swn2 + end;
+#else
+ swn = sw;
+#endif
+
+ for (i=0;i<N;i++)
+ {
+ best_score[i]=-1;
+ pitch[i]=start;
+ }
+
+
+ energy[0]=inner_prod(swn-start, swn-start, len);
+ e0=inner_prod(swn, swn, len);
+ for (i=start;i<=end;i++)
+ {
+ /* Update energy for next pitch*/
+ energy[i-start+1] = SUB32(ADD32(energy[i-start],SHR32(MULT16_16(swn[-i-1],swn[-i-1]),6)), SHR32(MULT16_16(swn[-i+len-1],swn[-i+len-1]),6));
+ if (energy[i-start+1] < 0)
+ energy[i-start+1] = 0;
+ }
+
+ pitch_xcorr(swn, swn-end, corr, len, end-start+1, stack);
+
+#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);
+ normalize16(corr, corr16, 16384, end-start+1);
+ normalize16(energy, ener16, 16384, end-start+1);
+
+ for (i=start;i<=end;i++)
+ {
+ spx_word16_t g;
+ spx_word32_t tmp;
+ tmp = corr16[i-start];
+ if (tmp>0)
+ {
+ if (SHR16(corr16[i-start],4)>ener16[i-start])
+ tmp = SHL32(EXTEND32(ener16[i-start]),14);
+ else if (-SHR16(corr16[i-start],4)>ener16[i-start])
+ tmp = -SHL32(EXTEND32(ener16[i-start]),14);
+ else
+ tmp = SHL32(tmp,10);
+ g = DIV32_16(tmp, 8+ener16[i-start]);
+ score[i-start] = MULT16_16(corr16[i-start],g);
+ } else
+ {
+ score[i-start] = 1;
+ }
+ }
+ }
+#else
+ for (i=start;i<=end;i++)
+ {
+ float g = corr[i-start]/(1+energy[i-start]);
+ if (g>16)
+ g = 16;
+ else if (g<-16)
+ g = -16;
+ score[i-start] = g*corr[i-start];
+ }
+#endif
+
+ /* Extract best scores */
+ for (i=start;i<=end;i++)
+ {
+ if (score[i-start]>best_score[N-1])
+ {
+ for (j=0;j<N;j++)
+ {
+ if (score[i-start] > best_score[j])
+ {
+ for (k=N-1;k>j;k--)
+ {
+ best_score[k]=best_score[k-1];
+ pitch[k]=pitch[k-1];
+ }
+ best_score[j]=score[i-start];
+ pitch[j]=i;
+ break;
+ }
+ }
+ }
+ }
+
+ /* 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;
+ }
+ }
+}
+
+
+/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
+static spx_word64_t pitch_gain_search_3tap(
+const spx_sig_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 void *par,
+int pitch, /* Pitch value */
+int p, /* Number of LPC coeffs */
+int nsf, /* Number of samples in subframe */
+SpeexBits *bits,
+char *stack,
+const spx_sig_t *exc2,
+const spx_word16_t *r,
+spx_sig_t *new_target,
+int *cdbk_index,
+int cdbk_offset,
+int plc_tuning
+)
+{
+ int i,j;
+ VARDECL(spx_sig_t *tmp1);
+ VARDECL(spx_sig_t *tmp2);
+ spx_sig_t *x[3];
+ spx_sig_t *e[3];
+ spx_word32_t corr[3];
+ spx_word32_t A[3][3];
+ int gain_cdbk_size;
+ const signed char *gain_cdbk;
+ spx_word16_t gain[3];
+ spx_word64_t err;
+
+ const ltp_params *params;
+ params = (const ltp_params*) par;
+ gain_cdbk_size = 1<<params->gain_bits;
+ gain_cdbk = params->gain_cdbk + 3*gain_cdbk_size*cdbk_offset;
+ ALLOC(tmp1, 3*nsf, spx_sig_t);
+ ALLOC(tmp2, 3*nsf, spx_sig_t);
+
+ x[0]=tmp1;
+ x[1]=tmp1+nsf;
+ x[2]=tmp1+2*nsf;
+
+ e[0]=tmp2;
+ e[1]=tmp2+nsf;
+ e[2]=tmp2+2*nsf;
+ for (i=2;i>=0;i--)
+ {
+ int pp=pitch+1-i;
+ for (j=0;j<nsf;j++)
+ {
+ if (j-pp<0)
+ e[i][j]=exc2[j-pp];
+ else if (j-pp-pitch<0)
+ e[i][j]=exc2[j-pp-pitch];
+ else
+ e[i][j]=0;
+ }
+
+ if (i==2)
+ syn_percep_zero(e[i], ak, awk1, awk2, x[i], nsf, p, stack);
+ else {
+ for (j=0;j<nsf-1;j++)
+ x[i][j+1]=x[i+1][j];
+ x[i][0]=0;
+ for (j=0;j<nsf;j++)
+ {
+ x[i][j]=ADD32(x[i][j],SHL32(MULT16_32_Q15(r[j], e[i][0]),1));
+ }
+ }
+ }
+
+#ifdef FIXED_POINT
+ {
+ /* If using fixed-point, we need to normalize the signals first */
+ spx_word16_t *y[3];
+ VARDECL(spx_word16_t *ytmp);
+ VARDECL(spx_word16_t *t);
+
+ spx_sig_t max_val=1;
+ int sig_shift;
+
+ ALLOC(ytmp, 3*nsf, spx_word16_t);
+#if 0
+ ALLOC(y[0], nsf, spx_word16_t);
+ ALLOC(y[1], nsf, spx_word16_t);
+ ALLOC(y[2], nsf, spx_word16_t);
+#else
+ y[0] = ytmp;
+ y[1] = ytmp+nsf;
+ y[2] = ytmp+2*nsf;
+#endif
+ ALLOC(t, nsf, spx_word16_t);
+ for (j=0;j<3;j++)
+ {
+ for (i=0;i<nsf;i++)
+ {
+ spx_sig_t tmp = x[j][i];
+ if (tmp<0)
+ tmp = -tmp;
+ if (tmp > max_val)
+ max_val = tmp;
+ }
+ }
+ for (i=0;i<nsf;i++)
+ {
+ spx_sig_t tmp = target[i];
+ if (tmp<0)
+ tmp = -tmp;
+ if (tmp > max_val)
+ max_val = tmp;
+ }
+
+ sig_shift=0;
+ while (max_val>16384)
+ {
+ sig_shift++;
+ max_val >>= 1;
+ }
+
+ for (j=0;j<3;j++)
+ {
+ for (i=0;i<nsf;i++)
+ {
+ y[j][i] = EXTRACT16(SHR32(x[j][i],sig_shift));
+ }
+ }
+ for (i=0;i<nsf;i++)
+ {
+ t[i] = EXTRACT16(SHR32(target[i],sig_shift));
+ }
+
+ for (i=0;i<3;i++)
+ corr[i]=inner_prod(y[i],t,nsf);
+
+ for (i=0;i<3;i++)
+ for (j=0;j<=i;j++)
+ A[i][j]=A[j][i]=inner_prod(y[i],y[j],nsf);
+ }
+#else
+ {
+ for (i=0;i<3;i++)
+ corr[i]=inner_prod(x[i],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);
+ }
+#endif
+
+ {
+ spx_word32_t C[9];
+ const signed char *ptr=gain_cdbk;
+ int best_cdbk=0;
+ spx_word32_t best_sum=0;
+ 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;
+#ifdef FIXED_POINT
+ C[0] = MAC16_32_Q15(C[0],MULT16_16_16(plc_tuning,-327),C[0]);
+ C[1] = MAC16_32_Q15(C[1],MULT16_16_16(plc_tuning,-327),C[1]);
+ C[2] = MAC16_32_Q15(C[2],MULT16_16_16(plc_tuning,-327),C[2]);
+ 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);
+#else
+ C[0]*=1-.01*plc_tuning;
+ C[1]*=1-.01*plc_tuning;
+ C[2]*=1-.01*plc_tuning;
+ C[6]*=.5*(1+.01*plc_tuning);
+ C[7]*=.5*(1+.01*plc_tuning);
+ C[8]*=.5*(1+.01*plc_tuning);
+#endif
+ for (i=0;i<gain_cdbk_size;i++)
+ {
+ spx_word32_t sum=0;
+ spx_word16_t g[3];
+ spx_word16_t pitch_control=64;
+ spx_word16_t gain_sum;
+
+ ptr = gain_cdbk+3*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);
+
+ /* We favor "safe" pitch values to handle packet loss better */
+ gain_sum = ADD16(ADD16(g[1],MAX16(g[0], 0)),MAX16(g[2], 0));
+ if (gain_sum > 64)
+ {
+ gain_sum = SUB16(gain_sum, 64);
+ if (gain_sum > 127)
+ gain_sum = 127;
+#ifdef FIXED_POINT
+ pitch_control = SUB16(64,EXTRACT16(PSHR32(MULT16_16(64,MULT16_16_16(plc_tuning, gain_sum)),10)));
+#else
+ pitch_control = 64*(1.-.001*plc_tuning*gain_sum);
+#endif
+ if (pitch_control < 0)
+ pitch_control = 0;
+ }
+
+ sum = compute_pitch_error(C, g, pitch_control);
+
+ if (sum>best_sum || i==0)
+ {
+ best_sum=sum;
+ best_cdbk=i;
+ }
+ }
+#ifdef FIXED_POINT
+ gain[0] = ADD16(32,(spx_word16_t)gain_cdbk[best_cdbk*3]);
+ gain[1] = ADD16(32,(spx_word16_t)gain_cdbk[best_cdbk*3+1]);
+ gain[2] = ADD16(32,(spx_word16_t)gain_cdbk[best_cdbk*3+2]);
+ /*printf ("%d %d %d %d\n",gain[0],gain[1],gain[2], best_cdbk);*/
+#else
+ gain[0] = 0.015625*gain_cdbk[best_cdbk*3] + .5;
+ gain[1] = 0.015625*gain_cdbk[best_cdbk*3+1]+ .5;
+ gain[2] = 0.015625*gain_cdbk[best_cdbk*3+2]+ .5;
+#endif
+ *cdbk_index=best_cdbk;
+ }
+
+#ifdef FIXED_POINT
+ for (i=0;i<nsf;i++)
+ exc[i]=SHL32(ADD32(ADD32(MULT16_32_Q15(SHL16(gain[0],7),e[2][i]), MULT16_32_Q15(SHL16(gain[1],7),e[1][i])),
+ MULT16_32_Q15(SHL16(gain[2],7),e[0][i])), 2);
+
+ err=0;
+ for (i=0;i<nsf;i++)
+ {
+ spx_word16_t perr2;
+ spx_sig_t tmp = SHL32(ADD32(ADD32(MULT16_32_Q15(SHL16(gain[0],7),x[2][i]),MULT16_32_Q15(SHL16(gain[1],7),x[1][i])),
+ MULT16_32_Q15(SHL16(gain[2],7),x[0][i])),2);
+ spx_sig_t perr=SUB32(target[i],tmp);
+ new_target[i] = SUB32(target[i], tmp);
+ perr2 = EXTRACT16(PSHR32(perr,15));
+ err = ADD64(err,MULT16_16(perr2,perr2));
+
+ }
+#else
+ for (i=0;i<nsf;i++)
+ exc[i]=gain[0]*e[2][i]+gain[1]*e[1][i]+gain[2]*e[0][i];
+
+ err=0;
+ for (i=0;i<nsf;i++)
+ {
+ spx_sig_t tmp = gain[2]*x[0][i]+gain[1]*x[1][i]+gain[0]*x[2][i];
+ new_target[i] = target[i] - tmp;
+ err+=new_target[i]*new_target[i];
+ }
+#endif
+
+ return err;
+}
+
+
+/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
+int pitch_search_3tap(
+spx_sig_t target[], /* Target vector */
+spx_sig_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_sig_t *exc2,
+spx_word16_t *r,
+int complexity,
+int cdbk_offset,
+int plc_tuning
+)
+{
+ int i,j;
+ int cdbk_index, pitch=0, best_gain_index=0;
+ VARDECL(spx_sig_t *best_exc);
+ VARDECL(spx_sig_t *new_target);
+ VARDECL(spx_sig_t *best_target);
+ int best_pitch=0;
+ spx_word64_t err, best_err=-1;
+ int N;
+ const ltp_params *params;
+ VARDECL(int *nbest);
+
+ 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;
+ }
+
+ ALLOC(best_exc, nsf, spx_sig_t);
+ ALLOC(new_target, nsf, spx_sig_t);
+ ALLOC(best_target, nsf, spx_sig_t);
+
+ 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;
+ 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, par, pitch, p, nsf,
+ bits, stack, exc2, r, new_target, &cdbk_index, cdbk_offset, plc_tuning);
+ 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);
+ /*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];
+
+ return pitch;
+}
+
+void pitch_unquant_3tap(
+spx_sig_t exc[], /* 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 + 3*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*3]);
+ gain[1] = ADD16(32,(spx_word16_t)gain_cdbk[gain_index*3+1]);
+ gain[2] = ADD16(32,(spx_word16_t)gain_cdbk[gain_index*3+2]);
+#else
+ gain[0] = 0.015625*gain_cdbk[gain_index*3]+.5;
+ gain[1] = 0.015625*gain_cdbk[gain_index*3+1]+.5;
+ gain[2] = 0.015625*gain_cdbk[gain_index*3+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];
+
+ {
+ spx_sig_t *e[3];
+ VARDECL(spx_sig_t *tmp2);
+ ALLOC(tmp2, 3*nsf, spx_sig_t);
+ e[0]=tmp2;
+ e[1]=tmp2+nsf;
+ e[2]=tmp2+2*nsf;
+
+ for (i=0;i<3;i++)
+ {
+ int j;
+ int pp=pitch+1-i;
+#if 0
+ for (j=0;j<nsf;j++)
+ {
+ if (j-pp<0)
+ e[i][j]=exc[j-pp];
+ else if (j-pp-pitch<0)
+ e[i][j]=exc[j-pp-pitch];
+ else
+ e[i][j]=0;
+ }
+#else
+ {
+ int tmp1, tmp3;
+ tmp1=nsf;
+ if (tmp1>pp)
+ tmp1=pp;
+ for (j=0;j<tmp1;j++)
+ e[i][j]=exc[j-pp];
+ tmp3=nsf;
+ if (tmp3>pp+pitch)
+ tmp3=pp+pitch;
+ for (j=tmp1;j<tmp3;j++)
+ e[i][j]=exc[j-pp-pitch];
+ for (j=tmp3;j<nsf;j++)
+ e[i][j]=0;
+ }
+#endif
+ }
+
+#ifdef FIXED_POINT
+ {
+ for (i=0;i<nsf;i++)
+ exc[i]=SHL32(ADD32(ADD32(MULT16_32_Q15(SHL16(gain[0],7),e[2][i]), MULT16_32_Q15(SHL16(gain[1],7),e[1][i])),
+ MULT16_32_Q15(SHL16(gain[2],7),e[0][i])), 2);
+ }
+#else
+ for (i=0;i<nsf;i++)
+ exc[i]=VERY_SMALL+gain[0]*e[2][i]+gain[1]*e[1][i]+gain[2]*e[0][i];
+#endif
+ }
+}
+
+
+/** Forced pitch delay and gain */
+int forced_pitch_quant(
+spx_sig_t target[], /* Target vector */
+spx_sig_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_sig_t *exc2,
+spx_word16_t *r,
+int complexity,
+int cdbk_offset,
+int plc_tuning
+)
+{
+ int i;
+ float coef = GAIN_SCALING_1*pitch_coef;
+ if (coef>.99)
+ coef=.99;
+ for (i=0;i<nsf;i++)
+ {
+ exc[i]=exc[i-start]*coef;
+ }
+ return start;
+}
+
+/** Unquantize forced pitch delay and gain */
+void forced_pitch_unquant(
+spx_sig_t exc[], /* 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;
+ float coef = GAIN_SCALING_1*pitch_coef;
+ if (coef>.99)
+ coef=.99;
+ for (i=0;i<nsf;i++)
+ {
+ exc[i]=exc[i-start]*coef;
+ }
+ *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 2024-07-13 13:01:08 +0000