ilbc_encoder.java

java的ilbc语音编码器,实现了其全部功能

   void SimpleAnalysis(
       float lsf[],         /* (o) lsf coefficients */
       float data[])    /* (i) new data vector */
   {
       int k, is;
       float [] temp = new float[ilbc_constants.BLOCKL_MAX];
       float [] lp = new float[ilbc_constants.LPC_FILTERORDER + 1];
       float [] lp2 = new float[ilbc_constants.LPC_FILTERORDER + 1];
       float [] r = new float[ilbc_constants.LPC_FILTERORDER + 1];

       is=ilbc_constants.LPC_LOOKBACK+ilbc_constants.BLOCKL_MAX-this.ULP_inst.blockl;
       //       System.out.println("copie 1");
//        System.out.println("\nInformations de copie : \nbuffer source : " + data.length + " octets\n"+
// 			  "buffer cible : " + this.lpc_buffer.length + "octets\n" +
// 			  "  offset : " + is + "octets\n" +
// 			  "longueur de la copie : " + this.ULP_inst.blockl);
       System.arraycopy(data, 0, this.lpc_buffer, is, this.ULP_inst.blockl);
//        memcpy(iLBCenc_inst->lpc_buffer+is,data,iLBCenc_inst->blockl*sizeof(float));

       /* No lookahead, last window is asymmetric */

       for (k = 0; k < this.ULP_inst.lpc_n; k++) {

           is = ilbc_constants.LPC_LOOKBACK;

           if (k < (this.ULP_inst.lpc_n - 1)) {
               window(temp, ilbc_constants.lpc_winTbl, this.lpc_buffer, 0,
		      ilbc_constants.BLOCKL_MAX);
           } else {
               window(temp, ilbc_constants.lpc_asymwinTbl,
                   this.lpc_buffer, is, ilbc_constants.BLOCKL_MAX);
           }

           autocorr(r, temp, ilbc_constants.BLOCKL_MAX, ilbc_constants.LPC_FILTERORDER);
           window(r, r, ilbc_constants.lpc_lagwinTbl, 0, ilbc_constants.LPC_FILTERORDER + 1);

           levdurb(lp, temp, r, ilbc_constants.LPC_FILTERORDER);
           ilbc_common.bwexpand(lp2, 0, lp, ilbc_constants.LPC_CHIRP_SYNTDENUM,
				ilbc_constants.LPC_FILTERORDER+1);

           a2lsf(lsf, k * ilbc_constants.LPC_FILTERORDER, lp2);
       }
       is=ilbc_constants.LPC_LOOKBACK+ilbc_constants.BLOCKL_MAX-this.ULP_inst.blockl;
//        System.out.println("copie 2");
       System.arraycopy(this.lpc_buffer, ilbc_constants.LPC_LOOKBACK + ilbc_constants.BLOCKL_MAX - is,
			this.lpc_buffer, 0, is);
//        memmove(iLBCenc_inst->lpc_buffer,
//            iLBCenc_inst->lpc_buffer+LPC_LOOKBACK+BLOCKL_MAX-is,
//            is*sizeof(float));
   }

   /*----------------------------------------------------------------*
    *  lsf interpolator and conversion from lsf to a coefficients
    *  (subrutine to SimpleInterpolateLSF)
    *---------------------------------------------------------------*/

   void LSFinterpolate2a_enc(
       float a[],       /* (o) lpc coefficients */
       float lsf1[],/* (i) first set of lsf coefficients */
       float lsf2[],/* (i) second set of lsf coefficients */
       int lsf2_idx,
       float coef,     /* (i) weighting coefficient to use between
                              lsf1 and lsf2 */
       long length      /* (i) length of coefficient vectors */
   ){
       float  [] lsftmp = new float[ilbc_constants.LPC_FILTERORDER];

       ilbc_common.interpolate(lsftmp, lsf1, lsf2, lsf2_idx, coef, ((int)length));
       ilbc_common.lsf2a(a, lsftmp);
   }

   /*----------------------------------------------------------------*
    *  lsf interpolator (subrutine to LPCencode)
    *---------------------------------------------------------------*/

   void SimpleInterpolateLSF(
       float syntdenum[],   /* (o) the synthesis filter denominator
                                  resulting from the quantized
                                  interpolated lsf */
       float weightdenum[], /* (o) the weighting filter denominator
                                  resulting from the unquantized
                                  interpolated lsf */
       float lsf[],         /* (i) the unquantized lsf coefficients */
       float lsfdeq[],      /* (i) the dequantized lsf coefficients */
       float lsfold[],      /* (i) the unquantized lsf coefficients of
                                  the previous signal frame */
       float lsfdeqold[], /* (i) the dequantized lsf coefficients of
                                  the previous signal frame */
       int length)         /* (i) should equate LPC_FILTERORDER */
   {
       int    i, pos, lp_length;
       float [] lp = new float[ilbc_constants.LPC_FILTERORDER + 1];
       int lsf2, lsfdeq2;

       lsf2 = length;
       lsfdeq2 = length;
//        lsf2 = lsf + length;
//        lsfdeq2 = lsfdeq + length;
       lp_length = length + 1;

       if (this.ULP_inst.mode==30) {
           /* sub-frame 1: Interpolation between old and first

              set of lsf coefficients */

           LSFinterpolate2a_enc(lp, lsfdeqold, lsfdeq, 0,
				ilbc_constants.lsf_weightTbl_30ms[0], length);
	   System.arraycopy(lp, 0, syntdenum, 0, lp_length);
	   //           memcpy(syntdenum,lp,lp_length*sizeof(float));
           LSFinterpolate2a_enc(lp, lsfold, lsf, 0,
				ilbc_constants.lsf_weightTbl_30ms[0], length);
           ilbc_common.bwexpand(weightdenum, 0, lp,
				   ilbc_constants.LPC_CHIRP_WEIGHTDENUM,
				   lp_length);

           /* sub-frame 2 to 6: Interpolation between first
              and second set of lsf coefficients */

           pos = lp_length;
           for (i = 1; i < this.ULP_inst.nsub; i++) {
               LSFinterpolate2a_enc(lp, lsfdeq, lsfdeq, lsfdeq2,
				    ilbc_constants.lsf_weightTbl_30ms[i], length);
	       System.arraycopy(lp, 0, syntdenum, pos, lp_length);
	       //               memcpy(syntdenum + pos,lp,lp_length*sizeof(float));

               LSFinterpolate2a_enc(lp, lsf, lsf, lsf2,
				    ilbc_constants.lsf_weightTbl_30ms[i], length);
               ilbc_common.bwexpand(weightdenum, pos, lp,
				    ilbc_constants.LPC_CHIRP_WEIGHTDENUM, lp_length);
               pos += lp_length;
           }
       }
       else {
           pos = 0;
           for (i = 0; i < this.ULP_inst.nsub; i++) {
	       //System.out.println("ici ?");
               LSFinterpolate2a_enc(lp, lsfdeqold, lsfdeq, 0,
				    ilbc_constants.lsf_weightTbl_20ms[i], length);
	       //System.out.println("ici !");
	       System.arraycopy(lp, 0, syntdenum, pos, lp_length);
	       for (int li = 0; li < lp_length; li++)
		   //System.out.println("interpolate syntdenum [" + (li+pos) +"] is worth " + syntdenum[li+pos]);
	       //               memcpy(syntdenum+pos,lp,lp_length*sizeof(float));
               LSFinterpolate2a_enc(lp, lsfold, lsf, 0,
				    ilbc_constants.lsf_weightTbl_20ms[i], length);
               ilbc_common.bwexpand(weightdenum, pos, lp,
				    ilbc_constants.LPC_CHIRP_WEIGHTDENUM, lp_length);
               pos += lp_length;
           }
       }

       /* update memory */

       if (this.ULP_inst.mode==30) {
	   System.arraycopy(lsf, lsf2, lsfold, 0, length);
//            memcpy(lsfold, lsf2, length*sizeof(float));
	   System.arraycopy(lsfdeq, lsfdeq2, lsfdeqold, 0, length);
//            memcpy(lsfdeqold, lsfdeq2, length*sizeof(float));
       }
       else {
	   System.arraycopy(lsf, 0, lsfold, 0, length);
//            memcpy(lsfold, lsf, length*sizeof(float));
	   System.arraycopy(lsfdeq, 0, lsfdeqold, 0, length);
//            memcpy(lsfdeqold, lsfdeq, length*sizeof(float));

       }
   }

   /*----------------------------------------------------------------*
    *  lsf quantizer (subrutine to LPCencode)
    *---------------------------------------------------------------*/

   void SimplelsfQ(
		   float lsfdeq[],    /* (o) dequantized lsf coefficients
                              (dimension FILTERORDER) */
		   int index[],     /* (o) quantization index */
		   float lsf[],      /* (i) the lsf coefficient vector to be
					 quantized (dimension FILTERORDER ) */
		   int lpc_n     /* (i) number of lsf sets to quantize */
   ){
       /* Quantize first LSF with memoryless split VQ */
       SplitVQ(lsfdeq, 0, index, 0, lsf, 0, ilbc_constants.lsfCbTbl,
	       ilbc_constants.LSF_NSPLIT, ilbc_constants.dim_lsfCbTbl,
	       ilbc_constants.size_lsfCbTbl);

       if (lpc_n==2) {
           /* Quantize second LSF with memoryless split VQ */
           SplitVQ(lsfdeq, ilbc_constants.LPC_FILTERORDER,
		   index, ilbc_constants.LSF_NSPLIT,
		   lsf, ilbc_constants.LPC_FILTERORDER,
		   ilbc_constants.lsfCbTbl,
		   ilbc_constants.LSF_NSPLIT,
		   ilbc_constants.dim_lsfCbTbl,
		   ilbc_constants.size_lsfCbTbl);
       }
   }

   /*----------------------------------------------------------------*
    *  lpc encoder
    *---------------------------------------------------------------*/

   void LPCencode(
       float syntdenum[], /* (i/o) synthesis filter coefficients
                                  before/after encoding */
       float weightdenum[], /* (i/o) weighting denumerator
                                  coefficients before/after
                                  encoding */
       int lsf_index[],     /* (o) lsf quantization index */
       float data[])    /* (i) lsf coefficients to quantize */
   {
       float [] lsf = new float[ilbc_constants.LPC_FILTERORDER * ilbc_constants.LPC_N_MAX];
       float [] lsfdeq= new float[ilbc_constants.LPC_FILTERORDER * ilbc_constants.LPC_N_MAX];
       int change = 0;

       SimpleAnalysis(lsf, data);
       //       for (int li = 0; li < ilbc_constants.LPC_FILTERORDER * ilbc_constants.LPC_N_MAX; li++)
       //	   System.out.println("postSA n-" + li + " is worth " + lsf[li]);
       //       for (int li = 0; li < ilbc_constants.BLOCKL_MAX; li++)
       //	   System.out.println("data postSA n-" + li + " is worth " + data[li]);
              SimplelsfQ(lsfdeq, lsf_index, lsf, this.ULP_inst.lpc_n);
	      //       for (int li = 0; li < ilbc_constants.LPC_FILTERORDER * ilbc_constants.LPC_N_MAX; li++)
	      //	   System.out.println("postSlsfQ n-" + li + " is worth " + lsfdeq[li]);
	      //       for (int li = 0; li < lsf_index.length; li++)
	      //	   System.out.println("index postSlsfQ n-" + li + " is worth " + lsf_index[li]);

       change = ilbc_common.LSF_check(lsfdeq, ilbc_constants.LPC_FILTERORDER, this.ULP_inst.lpc_n);
       //System.out.println("check gives " + change);
       SimpleInterpolateLSF(syntdenum, weightdenum,
			    lsf, lsfdeq, this.lsfold,
			    this.lsfdeqold, ilbc_constants.LPC_FILTERORDER);
       //       for (int li = 0; li < syntdenum.length; li++)
       //	   System.out.println("syntdenum[" + li +"] is worth " + syntdenum[li]);
   }

    public void iCBSearch(
			  int index[],         /* (o) Codebook indices */
       int index_idx,
       int gain_index[],/* (o) Gain quantization indices */
       int gain_index_idx,

       float intarget[],/* (i) Target vector for encoding */
       int intarget_idx,
       float mem[],         /* (i) Buffer for codebook construction */
       int mem_idx,
       int lMem,           /* (i) Length of buffer */
       int lTarget,    /* (i) Length of vector */
       int nStages,    /* (i) Number of codebook stages */
       float weightDenum[], /* (i) weighting filter coefficients */
       int weightDenum_idx,
       float weightState[], /* (i) weighting filter state */
       int block)           /* (i) the sub-block number */
    {
       int i, j, icount, stage, best_index, range, counter;
       float max_measure, gain, measure, crossDot, ftmp;
       float [] gains = new float[ilbc_constants.CB_NSTAGES];
       float [] target = new float[ilbc_constants.SUBL];
       int base_index, sInd, eInd, base_size;
       int sIndAug=0, eIndAug=0;
       float [] buf = new float[ilbc_constants.CB_MEML+ilbc_constants.SUBL+2*ilbc_constants.LPC_FILTERORDER];
       float [] invenergy = new float[ilbc_constants.CB_EXPAND*128];
       float [] energy = new float[ilbc_constants.CB_EXPAND*128];
       //       float *pp, *ppi=0, *ppo=0, *ppe=0;
       int pp, ppi = 0, ppo = 0, ppe = 0;
       float [] ppt;
       float [] cbvectors = new float[ilbc_constants.CB_MEML];
       float tene, cene;
       float [] cvec = new float[ilbc_constants.SUBL];
       float [] aug_vec = new float[ilbc_constants.SUBL];

       float [] a = new float[1];
       int [] b = new int[1];
       float [] c = new float[1];

       for (int li = 0; li < ilbc_constants.SUBL; li++)
	   cvec[li] = 0.0f;
       //       memset(cvec,0,SUBL*sizeof(float));

       /* Determine size of codebook sections */

       base_size=lMem-lTarget+1;

       if (lTarget == ilbc_constants.SUBL) {
           base_size=lMem-lTarget+1+lTarget/2;
       }

       /* setup buffer for weighting */

       System.arraycopy(weightState, 0, buf, 0, ilbc_constants.LPC_FILTERORDER);
//        memcpy(buf,weightState,sizeof(float)*LPC_FILTERORDER);
       System.arraycopy(mem, mem_idx, buf, ilbc_constants.LPC_FILTERORDER, lMem);
//        memcpy(buf+LPC_FILTERORDER,mem,lMem*sizeof(float));
       System.arraycopy(intarget, intarget_idx, buf, ilbc_constants.LPC_FILTERORDER+lMem, lTarget);
//        memcpy(buf+LPC_FILTERORDER+lMem,intarget,lTarget*sizeof(float));

       //System.out.println("beginning of mem");
//        for (int li = 0; li < lMem; li++)
// 	   System.out.println("mem[" + li + "] = " + mem[li+mem_idx]);
//       System.out.println("end of mem");


//        System.out.println("plages : [0-" + ilbc_constants.LPC_FILTERORDER +
// 			  "], puis [" + ilbc_constants.LPC_FILTERORDER + "-" + (ilbc_constants.LPC_FILTERORDER + lMem) +
// 			  "], puis [" + (ilbc_constants.LPC_FILTERORDER + lMem) +
// 			  "-" + (ilbc_constants.LPC_FILTERORDER + lMem + lTarget) + "]");

//       System.out.println("beginning of buffer");

//        for (int li = 0; li < buf.length; li++)
// 	   System.out.println("buffer[" + li + "] = " + buf[li]);

//       System.out.println("end of buffer");
       /* weighting */

       ilbc_common.AllPoleFilter(buf, ilbc_constants.LPC_FILTERORDER, weightDenum, weightDenum_idx,
		     lMem+lTarget, ilbc_constants.LPC_FILTERORDER);

       /* Construct the codebook and target needed */

       System.arraycopy(buf, ilbc_constants.LPC_FILTERORDER + lMem, target, 0, lTarget);
       //       memcpy(target, buf+LPC_FILTERORDER+lMem, lTarget*sizeof(float));

       tene=0.0f;

       for (i=0; i<lTarget; i++) {
           tene+=target[i]*target[i];
       }

       /* Prepare search over one more codebook section. This section
          is created by filtering the original buffer with a filter. */

       filteredCBvecs(cbvectors, buf, ilbc_constants.LPC_FILTERORDER, lMem);

       /* The Main Loop over stages */

       for (stage=0; stage<nStages; stage++) {

           range = ilbc_constants.search_rangeTbl[block][stage];

           /* initialize search measure */

           max_measure = (float)-10000000.0f;
           gain = (float)0.0f;
           best_index = 0;

           /* Compute cross dot product between the target
              and the CB memory */

           crossDot=0.0f;
           pp=ilbc_constants.LPC_FILTERORDER+lMem-lTarget;
//            pp=buf+ilbc_constants.LPC_FILTERORDER+lMem-lTarget;
           for (j=0; j<lTarget; j++) {
               crossDot += target[j]*(buf[pp]);
	       pp++;
           }

           if (stage==0) {

               /* Calculate energy in the first block of
                 'lTarget' samples. */
               ppe = 0;
               ppi = ilbc_constants.LPC_FILTERORDER+lMem-lTarget-1;
               ppo = ilbc_constants.LPC_FILTERORDER+lMem-1;
//                ppe = energy;
//                ppi = buf+ilbc_constants.LPC_FILTERORDER+lMem-lTarget-1;
//                ppo = buf+ilbc_constants.LPC_FILTERORDER+lMem-1;

               energy[ppe]=0.0f;
               pp=ilbc_constants.LPC_FILTERORDER+lMem-lTarget;
//                pp=buf+ilbc_constants.LPC_FILTERORDER+lMem-lTarget;
               for (j=0; j<lTarget; j++) {
                   energy[ppe]+=(buf[pp])*(buf[pp]);
		   pp++;
               }