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C++ EXTRACT16函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中EXTRACT16函数的典型用法代码示例。如果您正苦于以下问题：C++ EXTRACT16函数的具体用法？C++ EXTRACT16怎么用？C++ EXTRACT16使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了EXTRACT16函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: speex_decode_stereo_int

void speex_decode_stereo_int(spx_int16_t *data, int frame_size, SpeexStereoState *_stereo)
{
   int i;
   spx_word32_t balance;
   spx_word16_t e_left, e_right, e_ratio;
   RealSpeexStereoState *stereo = (RealSpeexStereoState*)_stereo;

   /* COMPATIBILITY_HACK(stereo); */
   
   balance=stereo->balance;
   e_ratio=stereo->e_ratio;
   
   /* These two are Q14, with max value just below 2. */
   e_right = DIV32(QCONST32(1., 22), spx_sqrt(MULT16_32_Q15(e_ratio, ADD32(QCONST32(1., 16), balance))));
   e_left = SHR32(MULT16_16(spx_sqrt(balance), e_right), 8);

   for (i=frame_size-1;i>=0;i--)
   {
      spx_int16_t tmp=data[i];
      stereo->smooth_left = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_left, QCONST16(0.98, 15)), e_left, QCONST16(0.02, 15)), 15));
      stereo->smooth_right = EXTRACT16(PSHR32(MAC16_16(MULT16_16(stereo->smooth_right, QCONST16(0.98, 15)), e_right, QCONST16(0.02, 15)), 15));
      data[2*i] = (spx_int16_t)MULT16_16_P14(stereo->smooth_left, tmp);
      data[2*i+1] = (spx_int16_t)MULT16_16_P14(stereo->smooth_right, tmp);
   }
}
开发者ID:4nykey，项目名称:rockbox，代码行数:25，代码来源:stereo.c


示例2: tansig_approx

static inline opus_val16 tansig_approx(opus_val32 _x)
{				/* Q19 */
	int i;
	opus_val16 xx;		/* Q11 */
	/*double x, y; */
	opus_val16 dy, yy;	/* Q14 */
	/*x = 1.9073e-06*_x; */
	if (_x >= QCONST32(8, 19))
		return QCONST32(1., 14);
	if (_x <= -QCONST32(8, 19))
		return -QCONST32(1., 14);
	xx = EXTRACT16(SHR32(_x, 8));
	/*i = lrint(25*x); */
	i = SHR32(ADD32(1024, MULT16_16(25, xx)), 11);
	/*x -= .04*i; */
	xx -= EXTRACT16(SHR32(MULT16_16(20972, i), 8));
	/*x = xx*(1./2048); */
	/*y = tansig_table[250+i]; */
	yy = tansig_table[250 + i];
	/*y = yy*(1./16384); */
	dy = 16384 - MULT16_16_Q14(yy, yy);
	yy = yy + MULT16_16_Q14(MULT16_16_Q11(xx, dy),
				(16384 - MULT16_16_Q11(yy, xx)));
	return yy;
}
开发者ID:CEPBEP，项目名称:onion-phone，代码行数:25，代码来源:mlp.c


示例3: exp_rotation1

static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s)
{
    int i;
    opus_val16 ms;
    celt_norm *Xptr;
    Xptr = X;
    ms = NEG16(s);
    for (i=0; i<len-stride; i++)
    {
        celt_norm x1, x2;
        x1 = Xptr[0];
        x2 = Xptr[stride];
        Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2),  s, x1), 15));
        *Xptr++      = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
    }
    Xptr = &X[len-2*stride-1];
    for (i=len-2*stride-1; i>=0; i--)
    {
        celt_norm x1, x2;
        x1 = Xptr[0];
        x2 = Xptr[stride];
        Xptr[stride] = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x2),  s, x1), 15));
        *Xptr--      = EXTRACT16(PSHR32(MAC16_16(MULT16_16(c, x1), ms, x2), 15));
    }
}
开发者ID:carriercomm，项目名称:opus，代码行数:25，代码来源:vq.c


示例4: mdf_adjust_prop

static inline void mdf_adjust_prop(const spx_word32_t *W, int N, int M, int P, spx_word16_t *prop)
{
   int i, j, p;
   spx_word16_t max_sum = 1;
   spx_word32_t prop_sum = 1;
   for (i=0;i<M;i++)
   {
      spx_word32_t tmp = 1;
      for (p=0;p<P;p++)
         for (j=0;j<N;j++)
            tmp += MULT16_16(EXTRACT16(SHR32(W[p*N*M + i*N+j],18)), EXTRACT16(SHR32(W[p*N*M + i*N+j],18)));
#ifdef FIXED_POINT
      /* Just a security in case an overflow were to occur */
      tmp = MIN32(ABS32(tmp), 536870912);
#endif
      prop[i] = spx_sqrt(tmp);
      if (prop[i] > max_sum)
         max_sum = prop[i];
   }
   for (i=0;i<M;i++)
   {
      prop[i] += MULT16_16_Q15(QCONST16(.1f,15),max_sum);
      prop_sum += EXTEND32(prop[i]);
   }
   for (i=0;i<M;i++)
   {
      prop[i] = DIV32(MULT16_16(QCONST16(.99f,15), prop[i]),prop_sum);
      /*printf ("%f ", prop[i]);*/
   }
   /*printf ("\n");*/
}
开发者ID:FreshLeaf8865，项目名称:mumble，代码行数:31，代码来源:mdf.c


示例5: compute_band_energies

/* Compute the amplitude (sqrt energy) in each of the bands */
void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bandE, int end, int C, int M)
{
   int i, c, N;
   const opus_int16 *eBands = m->eBands;
   N = M*m->shortMdctSize;
   c=0; do {
      for (i=0;i<end;i++)
      {
         int j;
         opus_val32 maxval=0;
         opus_val32 sum = 0;

         j=M*eBands[i]; do {
            maxval = MAX32(maxval, X[j+c*N]);
            maxval = MAX32(maxval, -X[j+c*N]);
         } while (++j<M*eBands[i+1]);

         if (maxval > 0)
         {
            int shift = celt_ilog2(maxval)-10;
            j=M*eBands[i]; do {
               sum = MAC16_16(sum, EXTRACT16(VSHR32(X[j+c*N],shift)),
                                   EXTRACT16(VSHR32(X[j+c*N],shift)));
            } while (++j<M*eBands[i+1]);
            /* We're adding one here to make damn sure we never end up with a pitch vector that's
               larger than unity norm */
            bandE[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
         } else {
            bandE[i+c*m->nbEBands] = EPSILON;
         }
         /*printf ("%f ", bandE[i+c*m->nbEBands]);*/
      }
   } while (++c<C);
   /*printf ("\n");*/
}
开发者ID:oneman，项目名称:opus-oneman，代码行数:36，代码来源:bands.c


示例6: forced_pitch_quant

/** 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)
{
	(void)sw;
	(void)par;
	(void)end;
	(void)bits;
	(void)r;
	(void)complexity;
	(void)cdbk_offset;
	(void)plc_tuning;
	(void)cumul_gain;
	int i;
	spx_word16_t res[nsf];
#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]);
	}
	for (i = 0; i < nsf; i++)
		res[i] = EXTRACT16(PSHR32(exc[i], SIG_SHIFT - 1));
	syn_percep_zero16(res, ak, awk1, awk2, res, nsf, p, stack);
	for (i = 0; i < nsf; i++)
		target[i] =
		    EXTRACT16(SATURATE
			      (SUB32(EXTEND32(target[i]), EXTEND32(res[i])),
			       32700));
	return start;
}
开发者ID:CEPBEP，项目名称:onion-phone，代码行数:53，代码来源:ltp.c


示例7: speex_rand

spx_word32_t speex_rand(spx_word16_t std, spx_int32_t *seed)
{
   spx_word32_t res;
   *seed = 1664525 * *seed + 1013904223;
   res = MULT16_16(EXTRACT16(SHR32(*seed,16)),std);
   return SUB32(res, SHR(res, 3));
}
开发者ID:Caboose1543，项目名称:LUNIServerProject，代码行数:7，代码来源:misc.c


示例8: compute_weighted_codebook

static void compute_weighted_codebook(const signed char *shape_cb, const spx_word16_t *r, spx_word16_t *resp, spx_word16_t *resp2, spx_word32_t *E, int shape_cb_size, int subvect_size, char *stack)
{
   int i, j, k;
   VARDECL(spx_word16_t *shape);
   ALLOC(shape, subvect_size, spx_word16_t);
   for (i=0;i<shape_cb_size;i++)
   {
      spx_word16_t *res;
      
      res = resp+i*subvect_size;
      for (k=0;k<subvect_size;k++)
         shape[k] = (spx_word16_t)shape_cb[i*subvect_size+k];
      E[i]=0;

      /* Compute codeword response using convolution with impulse response */
      for(j=0;j<subvect_size;j++)
      {
         spx_word32_t resj=0;
         spx_word16_t res16;
         for (k=0;k<=j;k++)
            resj = MAC16_16(resj,shape[k],r[j-k]);
#ifdef FIXED_POINT
         res16 = EXTRACT16(SHR32(resj, 13));
#else
         res16 = 0.03125f*resj;
#endif
         /* Compute codeword energy */
         E[i]=MAC16_16(E[i],res16,res16);
         res[j] = res16;
         /*printf ("%d\n", (int)res[j]);*/
      }
   }

}
开发者ID:TomDataworks，项目名称:whisper_client，代码行数:34，代码来源:cb_search.c


示例9: find_best_pitch

static void find_best_pitch(opus_val32 *xcorr, opus_val16 *y, int len,
                            int max_pitch, int *best_pitch
#ifdef FIXED_POINT
                            , int yshift, opus_val32 maxcorr
#endif
                            )
{
   int i, j;
   opus_val32 Syy=1;
   opus_val16 best_num[2];
   opus_val32 best_den[2];
#ifdef FIXED_POINT
   int xshift;

   xshift = celt_ilog2(maxcorr)-14;
#endif

   best_num[0] = -1;
   best_num[1] = -1;
   best_den[0] = 0;
   best_den[1] = 0;
   best_pitch[0] = 0;
   best_pitch[1] = 1;
   for (j=0;j<len;j++)
      Syy = ADD32(Syy, SHR32(MULT16_16(y[j],y[j]), yshift));
   for (i=0;i<max_pitch;i++)
   {
      if (xcorr[i]>0)
      {
         opus_val16 num;
         opus_val32 xcorr16;
         xcorr16 = EXTRACT16(VSHR32(xcorr[i], xshift));
#ifndef FIXED_POINT
         /* Considering the range of xcorr16, this should avoid both underflows
            and overflows (inf) when squaring xcorr16 */
         xcorr16 *= 1e-12f;
#endif
         num = MULT16_16_Q15(xcorr16,xcorr16);
         if (MULT16_32_Q15(num,best_den[1]) > MULT16_32_Q15(best_num[1],Syy))
         {
            if (MULT16_32_Q15(num,best_den[0]) > MULT16_32_Q15(best_num[0],Syy))
            {
               best_num[1] = best_num[0];
               best_den[1] = best_den[0];
               best_pitch[1] = best_pitch[0];
               best_num[0] = num;
               best_den[0] = Syy;
               best_pitch[0] = i;
            } else {
               best_num[1] = num;
               best_den[1] = Syy;
               best_pitch[1] = i;
            }
         }
      }
      Syy += SHR32(MULT16_16(y[i+len],y[i+len]),yshift) - SHR32(MULT16_16(y[i],y[i]),yshift);
      Syy = MAX32(1, Syy);
   }
}
开发者ID:93i，项目名称:godot，代码行数:59，代码来源:pitch.c


示例10: speex_echo_ctl

EXPORT int speex_echo_ctl(SpeexEchoState *st, int request, void *ptr)
{
   switch(request)
   {
      
      case SPEEX_ECHO_GET_FRAME_SIZE:
         (*(int*)ptr) = st->frame_size;
         break;
      case SPEEX_ECHO_SET_SAMPLING_RATE:
         st->sampling_rate = (*(int*)ptr);
         st->spec_average = DIV32_16(SHL32(EXTEND32(st->frame_size), 15), st->sampling_rate);
#ifdef FIXED_POINT
         st->beta0 = DIV32_16(SHL32(EXTEND32(st->frame_size), 16), st->sampling_rate);
         st->beta_max = DIV32_16(SHL32(EXTEND32(st->frame_size), 14), st->sampling_rate);
#else
         st->beta0 = (2.0f*st->frame_size)/st->sampling_rate;
         st->beta_max = (.5f*st->frame_size)/st->sampling_rate;
#endif
         if (st->sampling_rate<12000)
            st->notch_radius = QCONST16(.9, 15);
         else if (st->sampling_rate<24000)
            st->notch_radius = QCONST16(.982, 15);
         else
            st->notch_radius = QCONST16(.992, 15);
         break;
      case SPEEX_ECHO_GET_SAMPLING_RATE:
         (*(int*)ptr) = st->sampling_rate;
         break;
      case SPEEX_ECHO_GET_IMPULSE_RESPONSE_SIZE:
         /*FIXME: Implement this for multiple channels */
         *((spx_int32_t *)ptr) = st->M * st->frame_size;
         break;
      case SPEEX_ECHO_GET_IMPULSE_RESPONSE:
      {
         int M = st->M, N = st->window_size, n = st->frame_size, i, j;
         spx_int32_t *filt = (spx_int32_t *) ptr;
         for(j=0;j<M;j++)
         {
            /*FIXME: Implement this for multiple channels */
#ifdef FIXED_POINT
            for (i=0;i<N;i++)
               st->wtmp2[i] = EXTRACT16(PSHR32(st->W[j*N+i],16+NORMALIZE_SCALEDOWN));
            spx_ifft(st->fft_table, st->wtmp2, st->wtmp);
#else
            spx_ifft(st->fft_table, &st->W[j*N], st->wtmp);
#endif
            for(i=0;i<n;i++)
               filt[j*n+i] = PSHR32(MULT16_16(32767,st->wtmp[i]), WEIGHT_SHIFT-NORMALIZE_SCALEDOWN);
         }
      }
         break;
      default:
         speex_warning_int("Unknown speex_echo_ctl request: ", request);
         return -1;
   }
   return 0;
}
开发者ID:FreshLeaf8865，项目名称:mumble，代码行数:57，代码来源:mdf.c


示例11: SIG2WORD16

static __inline celt_word16_t SIG2WORD16(celt_sig_t x)
{
#ifdef FIXED_POINT
   x = PSHR32(x, SIG_SHIFT);
   x = MAX32(x, -32768);
   x = MIN32(x, 32767);
   return EXTRACT16(x);
#else
   return (celt_word16_t)x;
#endif
}
开发者ID:tzhuan，项目名称:llcon，代码行数:11，代码来源:celt.c


示例12: find_best_pitch

static void find_best_pitch(opus_val32 *xcorr, opus_val16 *y, int len,
                            int max_pitch, int *best_pitch
#ifdef FIXED_POINT
                            , int yshift, opus_val32 maxcorr
#endif
                            )
{
   int i, j;
   opus_val32 Syy=1;
   opus_val16 best_num[2];
   opus_val32 best_den[2];
#ifdef FIXED_POINT
   int xshift;

   xshift = celt_ilog2(maxcorr)-14;
#endif

   best_num[0] = -1;
   best_num[1] = -1;
   best_den[0] = 0;
   best_den[1] = 0;
   best_pitch[0] = 0;
   best_pitch[1] = 1;
   for (j=0;j<len;j++)
      Syy = MAC16_16(Syy, y[j],y[j]);
   for (i=0;i<max_pitch;i++)
   {
      if (xcorr[i]>0)
      {
         opus_val16 num;
         opus_val32 xcorr16;
         xcorr16 = EXTRACT16(VSHR32(xcorr[i], xshift));
         num = MULT16_16_Q15(xcorr16,xcorr16);
         if (MULT16_32_Q15(num,best_den[1]) > MULT16_32_Q15(best_num[1],Syy))
         {
            if (MULT16_32_Q15(num,best_den[0]) > MULT16_32_Q15(best_num[0],Syy))
            {
               best_num[1] = best_num[0];
               best_den[1] = best_den[0];
               best_pitch[1] = best_pitch[0];
               best_num[0] = num;
               best_den[0] = Syy;
               best_pitch[0] = i;
            } else {
               best_num[1] = num;
               best_den[1] = Syy;
               best_pitch[1] = i;
            }
         }
      }
      Syy += SHR32(MULT16_16(y[i+len],y[i+len]),yshift) - SHR32(MULT16_16(y[i],y[i]),yshift);
      Syy = MAX32(1, Syy);
   }
}
开发者ID:oneman，项目名称:opus-oneman，代码行数:54，代码来源:pitch.c


示例13: SIG2WORD16

static inline opus_val16 SIG2WORD16(celt_sig x)
{
#ifdef FIXED_POINT
   x = PSHR32(x, SIG_SHIFT);
   x = MAX32(x, -32768);
   x = MIN32(x, 32767);
   return EXTRACT16(x);
#else
   return (opus_val16)x;
#endif
}
开发者ID:Sciumo，项目名称:opus，代码行数:11，代码来源:celt_decoder.c


示例14: filterbank_compute_psd16

void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *ps)
{
   int i;
   for (i=0;i<bank->len;i++)
   {
      spx_word32_t tmp;
      int id1, id2;
      id1 = bank->bank_left[i];
      id2 = bank->bank_right[i];
      tmp = MULT16_16(mel[id1],bank->filter_left[i]);
      tmp += MULT16_16(mel[id2],bank->filter_right[i]);
      ps[i] = EXTRACT16(PSHR32(tmp,15));
   }
}
开发者ID:03050903，项目名称:godot，代码行数:14，代码来源:filterbank.c


示例15: compute_band_energies

/* Compute the amplitude (sqrt energy) in each of the bands */
void compute_band_energies(const CELTMode *m, const celt_sig *X, celt_ener *bank, int _C)
{
   int i, c, N;
   const celt_int16 *eBands = m->eBands;
   const int C = CHANNELS(_C);
   N = FRAMESIZE(m);
   for (c=0;c<C;c++)
   {
      for (i=0;i<m->nbEBands;i++)
      {
         int j;
         celt_word32 maxval=0;
         celt_word32 sum = 0;
         
         j=eBands[i]; do {
            maxval = MAX32(maxval, X[j+c*N]);
            maxval = MAX32(maxval, -X[j+c*N]);
         } while (++j<eBands[i+1]);
         
         if (maxval > 0)
         {
            int shift = celt_ilog2(maxval)-10;
            j=eBands[i]; do {
               sum = MAC16_16(sum, EXTRACT16(VSHR32(X[j+c*N],shift)),
                                   EXTRACT16(VSHR32(X[j+c*N],shift)));
            } while (++j<eBands[i+1]);
            /* We're adding one here to make damn sure we never end up with a pitch vector that's
               larger than unity norm */
            bank[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
         } else {
            bank[i+c*m->nbEBands] = EPSILON;
         }
         /*printf ("%f ", bank[i+c*m->nbEBands]);*/
      }
   }
   /*printf ("\n");*/
}
开发者ID:FreshLeaf8865，项目名称:mumble，代码行数:38，代码来源:bands.c


示例16: cubic_coef

static void cubic_coef(spx_word16_t x, spx_word16_t interp[4])
{
   /* Compute interpolation coefficients. I'm not sure whether this corresponds to cubic interpolation
   but I know it's MMSE-optimal on a sinc */
   spx_word16_t x2, x3;
   x2 = MULT16_16_P15(x, x);
   x3 = MULT16_16_P15(x, x2);
   interp[0] = PSHR32(MULT16_16(QCONST16(-0.16667f, 15),x) + MULT16_16(QCONST16(0.16667f, 15),x3),15);
   interp[1] = EXTRACT16(EXTEND32(x) + SHR32(SUB32(EXTEND32(x2),EXTEND32(x3)),1));
   interp[3] = PSHR32(MULT16_16(QCONST16(-0.33333f, 15),x) + MULT16_16(QCONST16(.5f,15),x2) - MULT16_16(QCONST16(0.16667f, 15),x3),15);
   /* Just to make sure we don't have rounding problems */
   interp[2] = Q15_ONE-interp[0]-interp[1]-interp[3];
   if (interp[2]<32767)
      interp[2]+=1;
}
开发者ID:CharaD7，项目名称:wireshark，代码行数:15，代码来源:resample.c


示例17: mlp_process

void mlp_process(const MLP * m, const opus_val16 * in, opus_val16 * out)
{
	int j;
	opus_val16 hidden[MAX_NEURONS];
	const opus_val16 *W = m->weights;
	/* Copy to tmp_in */
	for (j = 0; j < m->topo[1]; j++) {
		int k;
		opus_val32 sum = SHL32(EXTEND32(*W++), 8);
		for (k = 0; k < m->topo[0]; k++)
			sum = MAC16_16(sum, in[k], *W++);
		hidden[j] = tansig_approx(sum);
	}
	for (j = 0; j < m->topo[2]; j++) {
		int k;
		opus_val32 sum = SHL32(EXTEND32(*W++), 14);
		for (k = 0; k < m->topo[1]; k++)
			sum = MAC16_16(sum, hidden[k], *W++);
		out[j] = tansig_approx(EXTRACT16(PSHR32(sum, 17)));
	}
}
开发者ID:CEPBEP，项目名称:onion-phone，代码行数:21，代码来源:mlp.c


示例18: split_cb_search_shape_sign

void split_cb_search_shape_sign(
spx_word16_t target[],			/* target vector */
spx_coef_t ak[],			/* LPCs for this subframe */
spx_coef_t awk1[],			/* Weighted LPCs for this subframe */
spx_coef_t awk2[],			/* Weighted LPCs for this subframe */
const void *par,                      /* Codebook/search parameters*/
int   p,                        /* number of LPC coeffs */
int   nsf,                      /* number of samples in subframe */
spx_sig_t *exc,
spx_word16_t *r,
SpeexBits *bits,
char *stack,
int   complexity,
int   update_target
)
{
   int i,j,m,q;
   const signed char *shape_cb;
   int shape_cb_size = 32, subvect_size = 10;
   int best_index;
   spx_word32_t best_dist;
   spx_word16_t resp[320];
   spx_word16_t *resp2 = resp;
   spx_word32_t E[32];
   spx_word16_t t[40];
   spx_sig_t  e[40];
   shape_cb=exc_10_32_table;

   
   /* FIXME: Do we still need to copy the target? */
   SPEEX_COPY(t, target, nsf);

   //compute_weighted_codebook
   {
     int i, k;
     spx_word16_t shape[10];
	 for (i=0;i<shape_cb_size;i++)
     {
       spx_word16_t *res;
      
       res = resp+i*subvect_size;
       for (k=0;k<subvect_size;k++)
          shape[k] = (spx_word16_t)shape_cb[i*subvect_size+k];
       E[i]=0;

       /* Compute codeword response using convolution with impulse response */
       {
	     spx_word32_t resj;
         spx_word16_t res16;
	  	 
		 // 0          
         resj = MULT16_16(shape[0],r[0]);
		 res16 = EXTRACT16(SHR32(resj, 13));
         // Compute codeword energy 
         E[i]=MAC16_16(E[i],res16,res16);
         res[0] = res16;
         //++++++++++++++++++++++++++
         
		 // 1          
         resj = MULT16_16(shape[0],r[1]);    
		 resj = MAC16_16(resj,shape[1],r[0]);
         res16 = EXTRACT16(SHR32(resj, 13));
         // Compute codeword energy 
         E[i]=MAC16_16(E[i],res16,res16);
         res[1] = res16;
         //++++++++++++++++++++++++++
         
         // 2         
         resj = MULT16_16(shape[0],r[2]);    
		 resj = MAC16_16(resj,shape[1],r[1]);
         resj = MAC16_16(resj,shape[2],r[0]);
         res16 = EXTRACT16(SHR32(resj, 13));
         // Compute codeword energy 
         E[i]=MAC16_16(E[i],res16,res16);
         res[2] = res16;
         //++++++++++++++++++++++++++
         
         // 3          
         resj = MULT16_16(shape[0],r[3]);
         resj = MAC16_16(resj,shape[1],r[2]);
         resj = MAC16_16(resj,shape[2],r[1]);
		 resj = MAC16_16(resj,shape[3],r[0]);
         res16 = EXTRACT16(SHR32(resj, 13));
         // Compute codeword energy 
         E[i]=MAC16_16(E[i],res16,res16);
         res[3] = res16;
         //++++++++++++++++++++++++++
         
         // 4        
         resj = MULT16_16(shape[0],r[4]);
         resj = MAC16_16(resj,shape[1],r[3]);
         resj = MAC16_16(resj,shape[2],r[2]);
         resj = MAC16_16(resj,shape[3],r[1]);
		 resj = MAC16_16(resj,shape[4],r[0]);
         res16 = EXTRACT16(SHR32(resj, 13));
         // Compute codeword energy 
         E[i]=MAC16_16(E[i],res16,res16);
         res[4] = res16;
         //++++++++++++++++++++++++++
         
//.........这里部分代码省略.........
开发者ID:thaidao，项目名称:Workspace_Ex，代码行数:101，代码来源:cb_search.c


示例19: pitch_gain_search_3tap


//.........这里部分代码省略.........
#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];
开发者ID:Affix，项目名称:fgcom，代码行数:67，代码来源:ltp.c


示例20: split_cb_search_shape_sign


//.........这里部分代码省略.........
         }
         if (i==0)
            break;
      }
      for (j=0;j<N;j++)
      {
         /*previous target (we don't care what happened before*/
         for (m=(i+1)*subvect_size;m<nsf;m++)
            nt[j][m]=ot[best_ntarget[j]][m];
         
         /* New code: update the rest of the target only if it's worth it */
         for (m=0;m<subvect_size;m++)
         {
            spx_word16_t g;
            int rind;
            spx_word16_t sign=1;
            rind = best_nind[j];
            if (rind>=shape_cb_size)
            {
               sign=-1;
               rind-=shape_cb_size;
            }

            q=subvect_size-m;
#ifdef FIXED_POINT
            g=sign*shape_cb[rind*subvect_size+m];
#else
            g=sign*0.03125*shape_cb[rind*subvect_size+m];
#endif
            target_update(nt[j]+subvect_size*(i+1), g, r+q, nsf-subvect_size*(i+1));
         }

         for (q=0;q<nb_subvect;q++)
            nind[j][q]=oind[best_ntarget[j]][q];
         nind[j][i]=best_nind[j];
      }

      /*update old-new data*/
      /* just swap pointers instead of a long copy */
      {
         spx_word16_t **tmp2;
         tmp2=ot;
         ot=nt;
         nt=tmp2;
      }
      for (j=0;j<N;j++)
         for (m=0;m<nb_subvect;m++)
            oind[j][m]=nind[j][m];
      for (j=0;j<N;j++)
         odist[j]=ndist[j];
   }

   /*save indices*/
   for (i=0;i<nb_subvect;i++)
   {
      ind[i]=nind[0][i];
      speex_bits_pack(bits,ind[i],params->shape_bits+have_sign);
   }
   
   /* Put everything back together */
   for (i=0;i<nb_subvect;i++)
   {
      int rind;
      spx_word16_t sign=1;
      rind = ind[i];
      if (rind>=shape_cb_size)
      {
         sign=-1;
         rind-=shape_cb_size;
      }
#ifdef FIXED_POINT
      if (sign==1)
      {
         for (j=0;j<subvect_size;j++)
            e[subvect_size*i+j]=SHL32(EXTEND32(shape_cb[rind*subvect_size+j]),SIG_SHIFT-5);
      } else {
         for (j=0;j<subvect_size;j++)
            e[subvect_size*i+j]=NEG32(SHL32(EXTEND32(shape_cb[rind*subvect_size+j]),SIG_SHIFT-5));
      }
#else
      for (j=0;j<subvect_size;j++)
         e[subvect_size*i+j]=sign*0.03125*shape_cb[rind*subvect_size+j];
#endif
   }   
   /* Update excitation */
   for (j=0;j<nsf;j++)
      exc[j]=ADD32(exc[j],e[j]);
   
   /* Update target: only update target if necessary */
   if (update_target)
   {
      VARDECL(spx_word16_t *r2);
      ALLOC(r2, nsf, spx_word16_t);
      for (j=0;j<nsf;j++)
         r2[j] = EXTRACT16(PSHR32(e[j] ,6));
      syn_percep_zero16(r2, ak, awk1, awk2, r2, nsf,p, stack);
      for (j=0;j<nsf;j++)
         target[j]=SUB16(target[j],PSHR16(r2[j],2));
   }
}
开发者ID:TomDataworks，项目名称:whisper_client，代码行数:101，代码来源:cb_search.c



注：本文中的EXTRACT16函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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