Upgrade opus 1.0.2 -> 1.1

1 files changed, 0 insertions, 1302 deletions

diff --git a/src/opus-1.0.2/celt/bands.c b/src/opus-1.0.2/celt/bands.c
deleted file mode 100644
index 3be543c3..00000000
--- a/src/opus-1.0.2/celt/bands.c
+++ /dev/null
@@ -1,1302 +0,0 @@
-/* Copyright (c) 2007-2008 CSIRO
-   Copyright (c) 2007-2009 Xiph.Org Foundation
-   Copyright (c) 2008-2009 Gregory Maxwell
-   Written by Jean-Marc Valin and Gregory Maxwell */
-/*
-   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.
-
-   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 COPYRIGHT OWNER
-   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 "bands.h"
-#include "modes.h"
-#include "vq.h"
-#include "cwrs.h"
-#include "stack_alloc.h"
-#include "os_support.h"
-#include "mathops.h"
-#include "rate.h"
-
-opus_uint32 celt_lcg_rand(opus_uint32 seed)
-{
-   return 1664525 * seed + 1013904223;
-}
-
-/* This is a cos() approximation designed to be bit-exact on any platform. Bit exactness
-   with this approximation is important because it has an impact on the bit allocation */
-static opus_int16 bitexact_cos(opus_int16 x)
-{
-   opus_int32 tmp;
-   opus_int16 x2;
-   tmp = (4096+((opus_int32)(x)*(x)))>>13;
-   celt_assert(tmp<=32767);
-   x2 = tmp;
-   x2 = (32767-x2) + FRAC_MUL16(x2, (-7651 + FRAC_MUL16(x2, (8277 + FRAC_MUL16(-626, x2)))));
-   celt_assert(x2<=32766);
-   return 1+x2;
-}
-
-static int bitexact_log2tan(int isin,int icos)
-{
-   int lc;
-   int ls;
-   lc=EC_ILOG(icos);
-   ls=EC_ILOG(isin);
-   icos<<=15-lc;
-   isin<<=15-ls;
-   return (ls-lc)*(1<<11)
-         +FRAC_MUL16(isin, FRAC_MUL16(isin, -2597) + 7932)
-         -FRAC_MUL16(icos, FRAC_MUL16(icos, -2597) + 7932);
-}
-
-#ifdef FIXED_POINT
-/* 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 ensure the normalized band isn't 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");*/
-}
-
-/* Normalise each band such that the energy is one. */
-void normalise_bands(const CELTMode *m, const celt_sig * OPUS_RESTRICT freq, celt_norm * OPUS_RESTRICT X, const 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 {
-      i=0; do {
-         opus_val16 g;
-         int j,shift;
-         opus_val16 E;
-         shift = celt_zlog2(bandE[i+c*m->nbEBands])-13;
-         E = VSHR32(bandE[i+c*m->nbEBands], shift);
-         g = EXTRACT16(celt_rcp(SHL32(E,3)));
-         j=M*eBands[i]; do {
-            X[j+c*N] = MULT16_16_Q15(VSHR32(freq[j+c*N],shift-1),g);
-         } while (++j<M*eBands[i+1]);
-      } while (++i<end);
-   } while (++c<C);
-}
-
-#else /* FIXED_POINT */
-/* 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 sum = 1e-27f;
-         for (j=M*eBands[i];j<M*eBands[i+1];j++)
-            sum += X[j+c*N]*X[j+c*N];
-         bandE[i+c*m->nbEBands] = celt_sqrt(sum);
-         /*printf ("%f ", bandE[i+c*m->nbEBands]);*/
-      }
-   } while (++c<C);
-   /*printf ("\n");*/
-}
-
-/* Normalise each band such that the energy is one. */
-void normalise_bands(const CELTMode *m, const celt_sig * OPUS_RESTRICT freq, celt_norm * OPUS_RESTRICT X, const 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_val16 g = 1.f/(1e-27f+bandE[i+c*m->nbEBands]);
-         for (j=M*eBands[i];j<M*eBands[i+1];j++)
-            X[j+c*N] = freq[j+c*N]*g;
-      }
-   } while (++c<C);
-}
-
-#endif /* FIXED_POINT */
-
-/* De-normalise the energy to produce the synthesis from the unit-energy bands */
-void denormalise_bands(const CELTMode *m, const celt_norm * OPUS_RESTRICT X, celt_sig * OPUS_RESTRICT freq, const celt_ener *bandE, int end, int C, int M)
-{
-   int i, c, N;
-   const opus_int16 *eBands = m->eBands;
-   N = M*m->shortMdctSize;
-   celt_assert2(C<=2, "denormalise_bands() not implemented for >2 channels");
-   c=0; do {
-      celt_sig * OPUS_RESTRICT f;
-      const celt_norm * OPUS_RESTRICT x;
-      f = freq+c*N;
-      x = X+c*N;
-      for (i=0;i<end;i++)
-      {
-         int j, band_end;
-         opus_val32 g = SHR32(bandE[i+c*m->nbEBands],1);
-         j=M*eBands[i];
-         band_end = M*eBands[i+1];
-         do {
-            *f++ = SHL32(MULT16_32_Q15(*x, g),2);
-            x++;
-         } while (++j<band_end);
-      }
-      for (i=M*eBands[end];i<N;i++)
-         *f++ = 0;
-   } while (++c<C);
-}
-
-/* This prevents energy collapse for transients with multiple short MDCTs */
-void anti_collapse(const CELTMode *m, celt_norm *X_, unsigned char *collapse_masks, int LM, int C, int size,
-      int start, int end, opus_val16 *logE, opus_val16 *prev1logE,
-      opus_val16 *prev2logE, int *pulses, opus_uint32 seed)
-{
-   int c, i, j, k;
-   for (i=start;i<end;i++)
-   {
-      int N0;
-      opus_val16 thresh, sqrt_1;
-      int depth;
-#ifdef FIXED_POINT
-      int shift;
-      opus_val32 thresh32;
-#endif
-
-      N0 = m->eBands[i+1]-m->eBands[i];
-      /* depth in 1/8 bits */
-      depth = (1+pulses[i])/((m->eBands[i+1]-m->eBands[i])<<LM);
-
-#ifdef FIXED_POINT
-      thresh32 = SHR32(celt_exp2(-SHL16(depth, 10-BITRES)),1);
-      thresh = MULT16_32_Q15(QCONST16(0.5f, 15), MIN32(32767,thresh32));
-      {
-         opus_val32 t;
-         t = N0<<LM;
-         shift = celt_ilog2(t)>>1;
-         t = SHL32(t, (7-shift)<<1);
-         sqrt_1 = celt_rsqrt_norm(t);
-      }
-#else
-      thresh = .5f*celt_exp2(-.125f*depth);
-      sqrt_1 = celt_rsqrt(N0<<LM);
-#endif
-
-      c=0; do
-      {
-         celt_norm *X;
-         opus_val16 prev1;
-         opus_val16 prev2;
-         opus_val32 Ediff;
-         opus_val16 r;
-         int renormalize=0;
-         prev1 = prev1logE[c*m->nbEBands+i];
-         prev2 = prev2logE[c*m->nbEBands+i];
-         if (C==1)
-         {
-            prev1 = MAX16(prev1,prev1logE[m->nbEBands+i]);
-            prev2 = MAX16(prev2,prev2logE[m->nbEBands+i]);
-         }
-         Ediff = EXTEND32(logE[c*m->nbEBands+i])-EXTEND32(MIN16(prev1,prev2));
-         Ediff = MAX32(0, Ediff);
-
-#ifdef FIXED_POINT
-         if (Ediff < 16384)
-         {
-            opus_val32 r32 = SHR32(celt_exp2(-EXTRACT16(Ediff)),1);
-            r = 2*MIN16(16383,r32);
-         } else {
-            r = 0;
-         }
-         if (LM==3)
-            r = MULT16_16_Q14(23170, MIN32(23169, r));
-         r = SHR16(MIN16(thresh, r),1);
-         r = SHR32(MULT16_16_Q15(sqrt_1, r),shift);
-#else
-         /* r needs to be multiplied by 2 or 2*sqrt(2) depending on LM because
-            short blocks don't have the same energy as long */
-         r = 2.f*celt_exp2(-Ediff);
-         if (LM==3)
-            r *= 1.41421356f;
-         r = MIN16(thresh, r);
-         r = r*sqrt_1;
-#endif
-         X = X_+c*size+(m->eBands[i]<<LM);
-         for (k=0;k<1<<LM;k++)
-         {
-            /* Detect collapse */
-            if (!(collapse_masks[i*C+c]&1<<k))
-            {
-               /* Fill with noise */
-               for (j=0;j<N0;j++)
-               {
-                  seed = celt_lcg_rand(seed);
-                  X[(j<<LM)+k] = (seed&0x8000 ? r : -r);
-               }
-               renormalize = 1;
-            }
-         }
-         /* We just added some energy, so we need to renormalise */
-         if (renormalize)
-            renormalise_vector(X, N0<<LM, Q15ONE);
-      } while (++c<C);
-   }
-}
-
-static void intensity_stereo(const CELTMode *m, celt_norm *X, celt_norm *Y, const celt_ener *bandE, int bandID, int N)
-{
-   int i = bandID;
-   int j;
-   opus_val16 a1, a2;
-   opus_val16 left, right;
-   opus_val16 norm;
-#ifdef FIXED_POINT
-   int shift = celt_zlog2(MAX32(bandE[i], bandE[i+m->nbEBands]))-13;
-#endif
-   left = VSHR32(bandE[i],shift);
-   right = VSHR32(bandE[i+m->nbEBands],shift);
-   norm = EPSILON + celt_sqrt(EPSILON+MULT16_16(left,left)+MULT16_16(right,right));
-   a1 = DIV32_16(SHL32(EXTEND32(left),14),norm);
-   a2 = DIV32_16(SHL32(EXTEND32(right),14),norm);
-   for (j=0;j<N;j++)
-   {
-      celt_norm r, l;
-      l = X[j];
-      r = Y[j];
-      X[j] = MULT16_16_Q14(a1,l) + MULT16_16_Q14(a2,r);
-      /* Side is not encoded, no need to calculate */
-   }
-}
-
-static void stereo_split(celt_norm *X, celt_norm *Y, int N)
-{
-   int j;
-   for (j=0;j<N;j++)
-   {
-      celt_norm r, l;
-      l = MULT16_16_Q15(QCONST16(.70710678f,15), X[j]);
-      r = MULT16_16_Q15(QCONST16(.70710678f,15), Y[j]);
-      X[j] = l+r;
-      Y[j] = r-l;
-   }
-}
-
-static void stereo_merge(celt_norm *X, celt_norm *Y, opus_val16 mid, int N)
-{
-   int j;
-   opus_val32 xp=0, side=0;
-   opus_val32 El, Er;
-   opus_val16 mid2;
-#ifdef FIXED_POINT
-   int kl, kr;
-#endif
-   opus_val32 t, lgain, rgain;
-
-   /* Compute the norm of X+Y and X-Y as |X|^2 + |Y|^2 +/- sum(xy) */
-   for (j=0;j<N;j++)
-   {
-      xp = MAC16_16(xp, X[j], Y[j]);
-      side = MAC16_16(side, Y[j], Y[j]);
-   }
-   /* Compensating for the mid normalization */
-   xp = MULT16_32_Q15(mid, xp);
-   /* mid and side are in Q15, not Q14 like X and Y */
-   mid2 = SHR32(mid, 1);
-   El = MULT16_16(mid2, mid2) + side - 2*xp;
-   Er = MULT16_16(mid2, mid2) + side + 2*xp;
-   if (Er < QCONST32(6e-4f, 28) || El < QCONST32(6e-4f, 28))
-   {
-      for (j=0;j<N;j++)
-         Y[j] = X[j];
-      return;
-   }
-
-#ifdef FIXED_POINT
-   kl = celt_ilog2(El)>>1;
-   kr = celt_ilog2(Er)>>1;
-#endif
-   t = VSHR32(El, (kl-7)<<1);
-   lgain = celt_rsqrt_norm(t);
-   t = VSHR32(Er, (kr-7)<<1);
-   rgain = celt_rsqrt_norm(t);
-
-#ifdef FIXED_POINT
-   if (kl < 7)
-      kl = 7;
-   if (kr < 7)
-      kr = 7;
-#endif
-
-   for (j=0;j<N;j++)
-   {
-      celt_norm r, l;
-      /* Apply mid scaling (side is already scaled) */
-      l = MULT16_16_Q15(mid, X[j]);
-      r = Y[j];
-      X[j] = EXTRACT16(PSHR32(MULT16_16(lgain, SUB16(l,r)), kl+1));
-      Y[j] = EXTRACT16(PSHR32(MULT16_16(rgain, ADD16(l,r)), kr+1));
-   }
-}
-
-/* Decide whether we should spread the pulses in the current frame */
-int spreading_decision(const CELTMode *m, celt_norm *X, int *average,
-      int last_decision, int *hf_average, int *tapset_decision, int update_hf,
-      int end, int C, int M)
-{
-   int i, c, N0;
-   int sum = 0, nbBands=0;
-   const opus_int16 * OPUS_RESTRICT eBands = m->eBands;
-   int decision;
-   int hf_sum=0;
-
-   celt_assert(end>0);
-
-   N0 = M*m->shortMdctSize;
-
-   if (M*(eBands[end]-eBands[end-1]) <= 8)
-      return SPREAD_NONE;
-   c=0; do {
-      for (i=0;i<end;i++)
-      {
-         int j, N, tmp=0;
-         int tcount[3] = {0,0,0};
-         celt_norm * OPUS_RESTRICT x = X+M*eBands[i]+c*N0;
-         N = M*(eBands[i+1]-eBands[i]);
-         if (N<=8)
-            continue;
-         /* Compute rough CDF of |x[j]| */
-         for (j=0;j<N;j++)
-         {
-            opus_val32 x2N; /* Q13 */
-
-            x2N = MULT16_16(MULT16_16_Q15(x[j], x[j]), N);
-            if (x2N < QCONST16(0.25f,13))
-               tcount[0]++;
-            if (x2N < QCONST16(0.0625f,13))
-               tcount[1]++;
-            if (x2N < QCONST16(0.015625f,13))
-               tcount[2]++;
-         }
-
-         /* Only include four last bands (8 kHz and up) */
-         if (i>m->nbEBands-4)
-            hf_sum += 32*(tcount[1]+tcount[0])/N;
-         tmp = (2*tcount[2] >= N) + (2*tcount[1] >= N) + (2*tcount[0] >= N);
-         sum += tmp*256;
-         nbBands++;
-      }
-   } while (++c<C);
-
-   if (update_hf)
-   {
-      if (hf_sum)
-         hf_sum /= C*(4-m->nbEBands+end);
-      *hf_average = (*hf_average+hf_sum)>>1;
-      hf_sum = *hf_average;
-      if (*tapset_decision==2)
-         hf_sum += 4;
-      else if (*tapset_decision==0)
-         hf_sum -= 4;
-      if (hf_sum > 22)
-         *tapset_decision=2;
-      else if (hf_sum > 18)
-         *tapset_decision=1;
-      else
-         *tapset_decision=0;
-   }
-   /*printf("%d %d %d\n", hf_sum, *hf_average, *tapset_decision);*/
-   celt_assert(nbBands>0); /*M*(eBands[end]-eBands[end-1]) <= 8 assures this*/
-   sum /= nbBands;
-   /* Recursive averaging */
-   sum = (sum+*average)>>1;
-   *average = sum;
-   /* Hysteresis */
-   sum = (3*sum + (((3-last_decision)<<7) + 64) + 2)>>2;
-   if (sum < 80)
-   {
-      decision = SPREAD_AGGRESSIVE;
-   } else if (sum < 256)
-   {
-      decision = SPREAD_NORMAL;
-   } else if (sum < 384)
-   {
-      decision = SPREAD_LIGHT;
-   } else {
-      decision = SPREAD_NONE;
-   }
-#ifdef FUZZING
-   decision = rand()&0x3;
-   *tapset_decision=rand()%3;
-#endif
-   return decision;
-}
-
-#ifdef MEASURE_NORM_MSE
-
-float MSE[30] = {0};
-int nbMSEBands = 0;
-int MSECount[30] = {0};
-
-void dump_norm_mse(void)
-{
-   int i;
-   for (i=0;i<nbMSEBands;i++)
-   {
-      printf ("%g ", MSE[i]/MSECount[i]);
-   }
-   printf ("\n");
-}
-
-void measure_norm_mse(const CELTMode *m, float *X, float *X0, float *bandE, float *bandE0, int M, int N, int C)
-{
-   static int init = 0;
-   int i;
-   if (!init)
-   {
-      atexit(dump_norm_mse);
-      init = 1;
-   }
-   for (i=0;i<m->nbEBands;i++)
-   {
-      int j;
-      int c;
-      float g;
-      if (bandE0[i]<10 || (C==2 && bandE0[i+m->nbEBands]<1))
-         continue;
-      c=0; do {
-         g = bandE[i+c*m->nbEBands]/(1e-15+bandE0[i+c*m->nbEBands]);
-         for (j=M*m->eBands[i];j<M*m->eBands[i+1];j++)
-            MSE[i] += (g*X[j+c*N]-X0[j+c*N])*(g*X[j+c*N]-X0[j+c*N]);
-      } while (++c<C);
-      MSECount[i]+=C;
-   }
-   nbMSEBands = m->nbEBands;
-}
-
-#endif
-
-/* Indexing table for converting from natural Hadamard to ordery Hadamard
-   This is essentially a bit-reversed Gray, on top of which we've added
-   an inversion of the order because we want the DC at the end rather than
-   the beginning. The lines are for N=2, 4, 8, 16 */
-static const int ordery_table[] = {
-       1,  0,
-       3,  0,  2,  1,
-       7,  0,  4,  3,  6,  1,  5,  2,
-      15,  0,  8,  7, 12,  3, 11,  4, 14,  1,  9,  6, 13,  2, 10,  5,
-};
-
-static void deinterleave_hadamard(celt_norm *X, int N0, int stride, int hadamard)
-{
-   int i,j;
-   VARDECL(celt_norm, tmp);
-   int N;
-   SAVE_STACK;
-   N = N0*stride;
-   ALLOC(tmp, N, celt_norm);
-   celt_assert(stride>0);
-   if (hadamard)
-   {
-      const int *ordery = ordery_table+stride-2;
-      for (i=0;i<stride;i++)
-      {
-         for (j=0;j<N0;j++)
-            tmp[ordery[i]*N0+j] = X[j*stride+i];
-      }
-   } else {
-      for (i=0;i<stride;i++)
-         for (j=0;j<N0;j++)
-            tmp[i*N0+j] = X[j*stride+i];
-   }
-   for (j=0;j<N;j++)
-      X[j] = tmp[j];
-   RESTORE_STACK;
-}
-
-static void interleave_hadamard(celt_norm *X, int N0, int stride, int hadamard)
-{
-   int i,j;
-   VARDECL(celt_norm, tmp);
-   int N;
-   SAVE_STACK;
-   N = N0*stride;
-   ALLOC(tmp, N, celt_norm);
-   if (hadamard)
-   {
-      const int *ordery = ordery_table+stride-2;
-      for (i=0;i<stride;i++)
-         for (j=0;j<N0;j++)
-            tmp[j*stride+i] = X[ordery[i]*N0+j];
-   } else {
-      for (i=0;i<stride;i++)
-         for (j=0;j<N0;j++)
-            tmp[j*stride+i] = X[i*N0+j];
-   }
-   for (j=0;j<N;j++)
-      X[j] = tmp[j];
-   RESTORE_STACK;
-}
-
-void haar1(celt_norm *X, int N0, int stride)
-{
-   int i, j;
-   N0 >>= 1;
-   for (i=0;i<stride;i++)
-      for (j=0;j<N0;j++)
-      {
-         celt_norm tmp1, tmp2;
-         tmp1 = MULT16_16_Q15(QCONST16(.70710678f,15), X[stride*2*j+i]);
-         tmp2 = MULT16_16_Q15(QCONST16(.70710678f,15), X[stride*(2*j+1)+i]);
-         X[stride*2*j+i] = tmp1 + tmp2;
-         X[stride*(2*j+1)+i] = tmp1 - tmp2;
-      }
-}
-
-static int compute_qn(int N, int b, int offset, int pulse_cap, int stereo)
-{
-   static const opus_int16 exp2_table8[8] =
-      {16384, 17866, 19483, 21247, 23170, 25267, 27554, 30048};
-   int qn, qb;
-   int N2 = 2*N-1;
-   if (stereo && N==2)
-      N2--;
-   /* The upper limit ensures that in a stereo split with itheta==16384, we'll
-       always have enough bits left over to code at least one pulse in the
-       side; otherwise it would collapse, since it doesn't get folded. */
-   qb = IMIN(b-pulse_cap-(4<<BITRES), (b+N2*offset)/N2);
-
-   qb = IMIN(8<<BITRES, qb);
-
-   if (qb<(1<<BITRES>>1)) {
-      qn = 1;
-   } else {
-      qn = exp2_table8[qb&0x7]>>(14-(qb>>BITRES));
-      qn = (qn+1)>>1<<1;
-   }
-   celt_assert(qn <= 256);
-   return qn;
-}
-
-/* This function is responsible for encoding and decoding a band for both
-   the mono and stereo case. Even in the mono case, it can split the band
-   in two and transmit the energy difference with the two half-bands. It
-   can be called recursively so bands can end up being split in 8 parts. */
-static unsigned quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_norm *Y,
-      int N, int b, int spread, int B, int intensity, int tf_change, celt_norm *lowband, ec_ctx *ec,
-      opus_int32 *remaining_bits, int LM, celt_norm *lowband_out, const celt_ener *bandE, int level,
-      opus_uint32 *seed, opus_val16 gain, celt_norm *lowband_scratch, int fill)
-{
-   const unsigned char *cache;
-   int q;
-   int curr_bits;
-   int stereo, split;
-   int imid=0, iside=0;
-   int N0=N;
-   int N_B=N;
-   int N_B0;
-   int B0=B;
-   int time_divide=0;
-   int recombine=0;
-   int inv = 0;
-   opus_val16 mid=0, side=0;
-   int longBlocks;
-   unsigned cm=0;
-#ifdef RESYNTH
-   int resynth = 1;
-#else
-   int resynth = !encode;
-#endif
-
-   longBlocks = B0==1;
-
-   N_B /= B;
-   N_B0 = N_B;
-
-   split = stereo = Y != NULL;
-
-   /* Special case for one sample */
-   if (N==1)
-   {
-      int c;
-      celt_norm *x = X;
-      c=0; do {
-         int sign=0;
-         if (*remaining_bits>=1<<BITRES)
-         {
-            if (encode)
-            {
-               sign = x[0]<0;
-               ec_enc_bits(ec, sign, 1);
-            } else {
-               sign = ec_dec_bits(ec, 1);
-            }
-            *remaining_bits -= 1<<BITRES;
-            b-=1<<BITRES;
-         }
-         if (resynth)
-            x[0] = sign ? -NORM_SCALING : NORM_SCALING;
-         x = Y;
-      } while (++c<1+stereo);
-      if (lowband_out)
-         lowband_out[0] = SHR16(X[0],4);
-      return 1;
-   }
-
-   if (!stereo && level == 0)
-   {
-      int k;
-      if (tf_change>0)
-         recombine = tf_change;
-      /* Band recombining to increase frequency resolution */
-
-      if (lowband && (recombine || ((N_B&1) == 0 && tf_change<0) || B0>1))
-      {
-         int j;
-         for (j=0;j<N;j++)
-            lowband_scratch[j] = lowband[j];
-         lowband = lowband_scratch;
-      }
-
-      for (k=0;k<recombine;k++)
-      {
-         static const unsigned char bit_interleave_table[16]={
-           0,1,1,1,2,3,3,3,2,3,3,3,2,3,3,3
-         };
-         if (encode)
-            haar1(X, N>>k, 1<<k);
-         if (lowband)
-            haar1(lowband, N>>k, 1<<k);
-         fill = bit_interleave_table[fill&0xF]|bit_interleave_table[fill>>4]<<2;
-      }
-      B>>=recombine;
-      N_B<<=recombine;
-
-      /* Increasing the time resolution */
-      while ((N_B&1) == 0 && tf_change<0)
-      {
-         if (encode)
-            haar1(X, N_B, B);
-         if (lowband)
-            haar1(lowband, N_B, B);
-         fill |= fill<<B;
-         B <<= 1;
-         N_B >>= 1;
-         time_divide++;
-         tf_change++;
-      }
-      B0=B;
-      N_B0 = N_B;
-
-      /* Reorganize the samples in time order instead of frequency order */
-      if (B0>1)
-      {
-         if (encode)
-            deinterleave_hadamard(X, N_B>>recombine, B0<<recombine, longBlocks);
-         if (lowband)
-            deinterleave_hadamard(lowband, N_B>>recombine, B0<<recombine, longBlocks);
-      }
-   }
-
-   /* If we need 1.5 more bit than we can produce, split the band in two. */
-   cache = m->cache.bits + m->cache.index[(LM+1)*m->nbEBands+i];
-   if (!stereo && LM != -1 && b > cache[cache[0]]+12 && N>2)
-   {
-      N >>= 1;
-      Y = X+N;
-      split = 1;
-      LM -= 1;
-      if (B==1)
-         fill = (fill&1)|(fill<<1);
-      B = (B+1)>>1;
-   }
-
-   if (split)
-   {
-      int qn;
-      int itheta=0;
-      int mbits, sbits, delta;
-      int qalloc;
-      int pulse_cap;
-      int offset;
-      int orig_fill;
-      opus_int32 tell;
-
-      /* Decide on the resolution to give to the split parameter theta */
-      pulse_cap = m->logN[i]+LM*(1<<BITRES);
-      offset = (pulse_cap>>1) - (stereo&&N==2 ? QTHETA_OFFSET_TWOPHASE : QTHETA_OFFSET);
-      qn = compute_qn(N, b, offset, pulse_cap, stereo);
-      if (stereo && i>=intensity)
-         qn = 1;
-      if (encode)
-      {
-         /* theta is the atan() of the ratio between the (normalized)
-            side and mid. With just that parameter, we can re-scale both
-            mid and side because we know that 1) they have unit norm and
-            2) they are orthogonal. */
-         itheta = stereo_itheta(X, Y, stereo, N);
-      }
-      tell = ec_tell_frac(ec);
-      if (qn!=1)
-      {
-         if (encode)
-            itheta = (itheta*qn+8192)>>14;
-
-         /* Entropy coding of the angle. We use a uniform pdf for the
-            time split, a step for stereo, and a triangular one for the rest. */
-         if (stereo && N>2)
-         {
-            int p0 = 3;
-            int x = itheta;
-            int x0 = qn/2;
-            int ft = p0*(x0+1) + x0;
-            /* Use a probability of p0 up to itheta=8192 and then use 1 after */
-            if (encode)
-            {
-               ec_encode(ec,x<=x0?p0*x:(x-1-x0)+(x0+1)*p0,x<=x0?p0*(x+1):(x-x0)+(x0+1)*p0,ft);
-            } else {
-               int fs;
-               fs=ec_decode(ec,ft);
-               if (fs<(x0+1)*p0)
-                  x=fs/p0;
-               else
-                  x=x0+1+(fs-(x0+1)*p0);
-               ec_dec_update(ec,x<=x0?p0*x:(x-1-x0)+(x0+1)*p0,x<=x0?p0*(x+1):(x-x0)+(x0+1)*p0,ft);
-               itheta = x;
-            }
-         } else if (B0>1 || stereo) {
-            /* Uniform pdf */
-            if (encode)
-               ec_enc_uint(ec, itheta, qn+1);
-            else
-               itheta = ec_dec_uint(ec, qn+1);
-         } else {
-            int fs=1, ft;
-            ft = ((qn>>1)+1)*((qn>>1)+1);
-            if (encode)
-            {
-               int fl;
-
-               fs = itheta <= (qn>>1) ? itheta + 1 : qn + 1 - itheta;
-               fl = itheta <= (qn>>1) ? itheta*(itheta + 1)>>1 :
-                ft - ((qn + 1 - itheta)*(qn + 2 - itheta)>>1);
-
-               ec_encode(ec, fl, fl+fs, ft);
-            } else {
-               /* Triangular pdf */
-               int fl=0;
-               int fm;
-               fm = ec_decode(ec, ft);
-
-               if (fm < ((qn>>1)*((qn>>1) + 1)>>1))
-               {
-                  itheta = (isqrt32(8*(opus_uint32)fm + 1) - 1)>>1;
-                  fs = itheta + 1;
-                  fl = itheta*(itheta + 1)>>1;
-               }
-               else
-               {
-                  itheta = (2*(qn + 1)
-                   - isqrt32(8*(opus_uint32)(ft - fm - 1) + 1))>>1;
-                  fs = qn + 1 - itheta;
-                  fl = ft - ((qn + 1 - itheta)*(qn + 2 - itheta)>>1);
-               }
-
-               ec_dec_update(ec, fl, fl+fs, ft);
-            }
-         }
-         itheta = (opus_int32)itheta*16384/qn;
-         if (encode && stereo)
-         {
-            if (itheta==0)
-               intensity_stereo(m, X, Y, bandE, i, N);
-            else
-               stereo_split(X, Y, N);
-         }
-         /* NOTE: Renormalising X and Y *may* help fixed-point a bit at very high rate.
-                  Let's do that at higher complexity */
-      } else if (stereo) {
-         if (encode)
-         {
-            inv = itheta > 8192;
-            if (inv)
-            {
-               int j;
-               for (j=0;j<N;j++)
-                  Y[j] = -Y[j];
-            }
-            intensity_stereo(m, X, Y, bandE, i, N);
-         }
-         if (b>2<<BITRES && *remaining_bits > 2<<BITRES)
-         {
-            if (encode)
-               ec_enc_bit_logp(ec, inv, 2);
-            else
-               inv = ec_dec_bit_logp(ec, 2);
-         } else
-            inv = 0;
-         itheta = 0;
-      }
-      qalloc = ec_tell_frac(ec) - tell;
-      b -= qalloc;
-
-      orig_fill = fill;
-      if (itheta == 0)
-      {
-         imid = 32767;
-         iside = 0;
-         fill &= (1<<B)-1;
-         delta = -16384;
-      } else if (itheta == 16384)
-      {
-         imid = 0;
-         iside = 32767;
-         fill &= ((1<<B)-1)<<B;
-         delta = 16384;
-      } else {
-         imid = bitexact_cos((opus_int16)itheta);
-         iside = bitexact_cos((opus_int16)(16384-itheta));
-         /* This is the mid vs side allocation that minimizes squared error
-            in that band. */
-         delta = FRAC_MUL16((N-1)<<7,bitexact_log2tan(iside,imid));
-      }
-
-#ifdef FIXED_POINT
-      mid = imid;
-      side = iside;
-#else
-      mid = (1.f/32768)*imid;
-      side = (1.f/32768)*iside;
-#endif
-
-      /* This is a special case for N=2 that only works for stereo and takes
-         advantage of the fact that mid and side are orthogonal to encode
-         the side with just one bit. */
-      if (N==2 && stereo)
-      {
-         int c;
-         int sign=0;
-         celt_norm *x2, *y2;
-         mbits = b;
-         sbits = 0;
-         /* Only need one bit for the side */
-         if (itheta != 0 && itheta != 16384)
-            sbits = 1<<BITRES;
-         mbits -= sbits;
-         c = itheta > 8192;
-         *remaining_bits -= qalloc+sbits;
-
-         x2 = c ? Y : X;
-         y2 = c ? X : Y;
-         if (sbits)
-         {
-            if (encode)
-            {
-               /* Here we only need to encode a sign for the side */
-               sign = x2[0]*y2[1] - x2[1]*y2[0] < 0;
-               ec_enc_bits(ec, sign, 1);
-            } else {
-               sign = ec_dec_bits(ec, 1);
-            }
-         }
-         sign = 1-2*sign;
-         /* We use orig_fill here because we want to fold the side, but if
-             itheta==16384, we'll have cleared the low bits of fill. */
-         cm = quant_band(encode, m, i, x2, NULL, N, mbits, spread, B, intensity, tf_change, lowband, ec, remaining_bits, LM, lowband_out, NULL, level, seed, gain, lowband_scratch, orig_fill);
-         /* We don't split N=2 bands, so cm is either 1 or 0 (for a fold-collapse),
-             and there's no need to worry about mixing with the other channel. */
-         y2[0] = -sign*x2[1];
-         y2[1] = sign*x2[0];
-         if (resynth)
-         {
-            celt_norm tmp;
-            X[0] = MULT16_16_Q15(mid, X[0]);
-            X[1] = MULT16_16_Q15(mid, X[1]);
-            Y[0] = MULT16_16_Q15(side, Y[0]);
-            Y[1] = MULT16_16_Q15(side, Y[1]);
-            tmp = X[0];
-            X[0] = SUB16(tmp,Y[0]);
-            Y[0] = ADD16(tmp,Y[0]);
-            tmp = X[1];
-            X[1] = SUB16(tmp,Y[1]);
-            Y[1] = ADD16(tmp,Y[1]);
-         }
-      } else {
-         /* "Normal" split code */
-         celt_norm *next_lowband2=NULL;
-         celt_norm *next_lowband_out1=NULL;
-         int next_level=0;
-         opus_int32 rebalance;
-
-         /* Give more bits to low-energy MDCTs than they would otherwise deserve */
-         if (B0>1 && !stereo && (itheta&0x3fff))
-         {
-            if (itheta > 8192)
-               /* Rough approximation for pre-echo masking */
-               delta -= delta>>(4-LM);
-            else
-               /* Corresponds to a forward-masking slope of 1.5 dB per 10 ms */
-               delta = IMIN(0, delta + (N<<BITRES>>(5-LM)));
-         }
-         mbits = IMAX(0, IMIN(b, (b-delta)/2));
-         sbits = b-mbits;
-         *remaining_bits -= qalloc;
-
-         if (lowband && !stereo)
-            next_lowband2 = lowband+N; /* >32-bit split case */
-
-         /* Only stereo needs to pass on lowband_out. Otherwise, it's
-            handled at the end */
-         if (stereo)
-            next_lowband_out1 = lowband_out;
-         else
-            next_level = level+1;
-
-         rebalance = *remaining_bits;
-         if (mbits >= sbits)
-         {
-            /* In stereo mode, we do not apply a scaling to the mid because we need the normalized
-               mid for folding later */
-            cm = quant_band(encode, m, i, X, NULL, N, mbits, spread, B, intensity, tf_change,
-                  lowband, ec, remaining_bits, LM, next_lowband_out1,
-                  NULL, next_level, seed, stereo ? Q15ONE : MULT16_16_P15(gain,mid), lowband_scratch, fill);
-            rebalance = mbits - (rebalance-*remaining_bits);
-            if (rebalance > 3<<BITRES && itheta!=0)
-               sbits += rebalance - (3<<BITRES);
-
-            /* For a stereo split, the high bits of fill are always zero, so no
-               folding will be done to the side. */
-            cm |= quant_band(encode, m, i, Y, NULL, N, sbits, spread, B, intensity, tf_change,
-                  next_lowband2, ec, remaining_bits, LM, NULL,
-                  NULL, next_level, seed, MULT16_16_P15(gain,side), NULL, fill>>B)<<((B0>>1)&(stereo-1));
-         } else {
-            /* For a stereo split, the high bits of fill are always zero, so no
-               folding will be done to the side. */
-            cm = quant_band(encode, m, i, Y, NULL, N, sbits, spread, B, intensity, tf_change,
-                  next_lowband2, ec, remaining_bits, LM, NULL,
-                  NULL, next_level, seed, MULT16_16_P15(gain,side), NULL, fill>>B)<<((B0>>1)&(stereo-1));
-            rebalance = sbits - (rebalance-*remaining_bits);
-            if (rebalance > 3<<BITRES && itheta!=16384)
-               mbits += rebalance - (3<<BITRES);
-            /* In stereo mode, we do not apply a scaling to the mid because we need the normalized
-               mid for folding later */
-            cm |= quant_band(encode, m, i, X, NULL, N, mbits, spread, B, intensity, tf_change,
-                  lowband, ec, remaining_bits, LM, next_lowband_out1,
-                  NULL, next_level, seed, stereo ? Q15ONE : MULT16_16_P15(gain,mid), lowband_scratch, fill);
-         }
-      }
-
-   } else {
-      /* This is the basic no-split case */
-      q = bits2pulses(m, i, LM, b);
-      curr_bits = pulses2bits(m, i, LM, q);
-      *remaining_bits -= curr_bits;
-
-      /* Ensures we can never bust the budget */
-      while (*remaining_bits < 0 && q > 0)
-      {
-         *remaining_bits += curr_bits;
-         q--;
-         curr_bits = pulses2bits(m, i, LM, q);
-         *remaining_bits -= curr_bits;
-      }
-
-      if (q!=0)
-      {
-         int K = get_pulses(q);
-
-         /* Finally do the actual quantization */
-         if (encode)
-         {
-            cm = alg_quant(X, N, K, spread, B, ec
-#ifdef RESYNTH
-                 , gain
-#endif
-                 );
-         } else {
-            cm = alg_unquant(X, N, K, spread, B, ec, gain);
-         }
-      } else {
-         /* If there's no pulse, fill the band anyway */
-         int j;
-         if (resynth)
-         {
-            unsigned cm_mask;
-            /*B can be as large as 16, so this shift might overflow an int on a
-               16-bit platform; use a long to get defined behavior.*/
-            cm_mask = (unsigned)(1UL<<B)-1;
-            fill &= cm_mask;
-            if (!fill)
-            {
-               for (j=0;j<N;j++)
-                  X[j] = 0;
-            } else {
-               if (lowband == NULL)
-               {
-                  /* Noise */
-                  for (j=0;j<N;j++)
-                  {
-                     *seed = celt_lcg_rand(*seed);
-                     X[j] = (celt_norm)((opus_int32)*seed>>20);
-                  }
-                  cm = cm_mask;
-               } else {
-                  /* Folded spectrum */
-                  for (j=0;j<N;j++)
-                  {
-                     opus_val16 tmp;
-                     *seed = celt_lcg_rand(*seed);
-                     /* About 48 dB below the "normal" folding level */
-                     tmp = QCONST16(1.0f/256, 10);
-                     tmp = (*seed)&0x8000 ? tmp : -tmp;
-                     X[j] = lowband[j]+tmp;
-                  }
-                  cm = fill;
-               }
-               renormalise_vector(X, N, gain);
-            }
-         }
-      }
-   }
-
-   /* This code is used by the decoder and by the resynthesis-enabled encoder */
-   if (resynth)
-   {
-      if (stereo)
-      {
-         if (N!=2)
-            stereo_merge(X, Y, mid, N);
-         if (inv)
-         {
-            int j;
-            for (j=0;j<N;j++)
-               Y[j] = -Y[j];
-         }
-      } else if (level == 0)
-      {
-         int k;
-
-         /* Undo the sample reorganization going from time order to frequency order */
-         if (B0>1)
-            interleave_hadamard(X, N_B>>recombine, B0<<recombine, longBlocks);
-
-         /* Undo time-freq changes that we did earlier */
-         N_B = N_B0;
-         B = B0;
-         for (k=0;k<time_divide;k++)
-         {
-            B >>= 1;
-            N_B <<= 1;
-            cm |= cm>>B;
-            haar1(X, N_B, B);
-         }
-
-         for (k=0;k<recombine;k++)
-         {
-            static const unsigned char bit_deinterleave_table[16]={
-              0x00,0x03,0x0C,0x0F,0x30,0x33,0x3C,0x3F,
-              0xC0,0xC3,0xCC,0xCF,0xF0,0xF3,0xFC,0xFF
-            };
-            cm = bit_deinterleave_table[cm];
-            haar1(X, N0>>k, 1<<k);
-         }
-         B<<=recombine;
-
-         /* Scale output for later folding */
-         if (lowband_out)
-         {
-            int j;
-            opus_val16 n;
-            n = celt_sqrt(SHL32(EXTEND32(N0),22));
-            for (j=0;j<N0;j++)
-               lowband_out[j] = MULT16_16_Q15(n,X[j]);
-         }
-         cm &= (1<<B)-1;
-      }
-   }
-   return cm;
-}
-
-void quant_all_bands(int encode, const CELTMode *m, int start, int end,
-      celt_norm *X_, celt_norm *Y_, unsigned char *collapse_masks, const celt_ener *bandE, int *pulses,
-      int shortBlocks, int spread, int dual_stereo, int intensity, int *tf_res,
-      opus_int32 total_bits, opus_int32 balance, ec_ctx *ec, int LM, int codedBands, opus_uint32 *seed)
-{
-   int i;
-   opus_int32 remaining_bits;
-   const opus_int16 * OPUS_RESTRICT eBands = m->eBands;
-   celt_norm * OPUS_RESTRICT norm, * OPUS_RESTRICT norm2;
-   VARDECL(celt_norm, _norm);
-   VARDECL(celt_norm, lowband_scratch);
-   int B;
-   int M;
-   int lowband_offset;
-   int update_lowband = 1;
-   int C = Y_ != NULL ? 2 : 1;
-#ifdef RESYNTH
-   int resynth = 1;
-#else
-   int resynth = !encode;
-#endif
-   SAVE_STACK;
-
-   M = 1<<LM;
-   B = shortBlocks ? M : 1;
-   ALLOC(_norm, C*M*eBands[m->nbEBands], celt_norm);
-   ALLOC(lowband_scratch, M*(eBands[m->nbEBands]-eBands[m->nbEBands-1]), celt_norm);
-   norm = _norm;
-   norm2 = norm + M*eBands[m->nbEBands];
-
-   lowband_offset = 0;
-   for (i=start;i<end;i++)
-   {
-      opus_int32 tell;
-      int b;
-      int N;
-      opus_int32 curr_balance;
-      int effective_lowband=-1;
-      celt_norm * OPUS_RESTRICT X, * OPUS_RESTRICT Y;
-      int tf_change=0;
-      unsigned x_cm;
-      unsigned y_cm;
-
-      X = X_+M*eBands[i];
-      if (Y_!=NULL)
-         Y = Y_+M*eBands[i];
-      else
-         Y = NULL;
-      N = M*eBands[i+1]-M*eBands[i];
-      tell = ec_tell_frac(ec);
-
-      /* Compute how many bits we want to allocate to this band */
-      if (i != start)
-         balance -= tell;
-      remaining_bits = total_bits-tell-1;
-      if (i <= codedBands-1)
-      {
-         curr_balance = balance / IMIN(3, codedBands-i);
-         b = IMAX(0, IMIN(16383, IMIN(remaining_bits+1,pulses[i]+curr_balance)));
-      } else {
-         b = 0;
-      }
-
-      if (resynth && M*eBands[i]-N >= M*eBands[start] && (update_lowband || lowband_offset==0))
-            lowband_offset = i;
-
-      tf_change = tf_res[i];
-      if (i>=m->effEBands)
-      {
-         X=norm;
-         if (Y_!=NULL)
-            Y = norm;
-      }
-
-      /* Get a conservative estimate of the collapse_mask's for the bands we're
-          going to be folding from. */
-      if (lowband_offset != 0 && (spread!=SPREAD_AGGRESSIVE || B>1 || tf_change<0))
-      {
-         int fold_start;
-         int fold_end;
-         int fold_i;
-         /* This ensures we never repeat spectral content within one band */
-         effective_lowband = IMAX(M*eBands[start], M*eBands[lowband_offset]-N);
-         fold_start = lowband_offset;
-         while(M*eBands[--fold_start] > effective_lowband);
-         fold_end = lowband_offset-1;
-         while(M*eBands[++fold_end] < effective_lowband+N);
-         x_cm = y_cm = 0;
-         fold_i = fold_start; do {
-           x_cm |= collapse_masks[fold_i*C+0];
-           y_cm |= collapse_masks[fold_i*C+C-1];
-         } while (++fold_i<fold_end);
-      }
-      /* Otherwise, we'll be using the LCG to fold, so all blocks will (almost
-          always) be non-zero.*/
-      else
-         x_cm = y_cm = (1<<B)-1;
-
-      if (dual_stereo && i==intensity)
-      {
-         int j;
-
-         /* Switch off dual stereo to do intensity */
-         dual_stereo = 0;
-         if (resynth)
-            for (j=M*eBands[start];j<M*eBands[i];j++)
-               norm[j] = HALF32(norm[j]+norm2[j]);
-      }
-      if (dual_stereo)
-      {
-         x_cm = quant_band(encode, m, i, X, NULL, N, b/2, spread, B, intensity, tf_change,
-               effective_lowband != -1 ? norm+effective_lowband : NULL, ec, &remaining_bits, LM,
-               norm+M*eBands[i], bandE, 0, seed, Q15ONE, lowband_scratch, x_cm);
-         y_cm = quant_band(encode, m, i, Y, NULL, N, b/2, spread, B, intensity, tf_change,
-               effective_lowband != -1 ? norm2+effective_lowband : NULL, ec, &remaining_bits, LM,
-               norm2+M*eBands[i], bandE, 0, seed, Q15ONE, lowband_scratch, y_cm);
-      } else {
-         x_cm = quant_band(encode, m, i, X, Y, N, b, spread, B, intensity, tf_change,
-               effective_lowband != -1 ? norm+effective_lowband : NULL, ec, &remaining_bits, LM,
-               norm+M*eBands[i], bandE, 0, seed, Q15ONE, lowband_scratch, x_cm|y_cm);
-         y_cm = x_cm;
-      }
-      collapse_masks[i*C+0] = (unsigned char)x_cm;
-      collapse_masks[i*C+C-1] = (unsigned char)y_cm;
-      balance += pulses[i] + tell;
-
-      /* Update the folding position only as long as we have 1 bit/sample depth */
-      update_lowband = b>(N<<BITRES);
-   }
-   RESTORE_STACK;
-}
-