From e9d273f7b0544b03e4d73e1078b2755fef0e05f7 Mon Sep 17 00:00:00 2001
From: /dev/humancontroller <devhc@example.com>
Date: Sat, 28 Mar 2015 01:21:52 +0100
Subject: remove most libraries from the source tree

---
 src/opus-1.1/celt/vq.c | 415 -------------------------------------------------
 1 file changed, 415 deletions(-)
 delete mode 100644 src/opus-1.1/celt/vq.c

(limited to 'src/opus-1.1/celt/vq.c')

diff --git a/src/opus-1.1/celt/vq.c b/src/opus-1.1/celt/vq.c
deleted file mode 100644
index 98a0f36c..00000000
--- a/src/opus-1.1/celt/vq.c
+++ /dev/null
@@ -1,415 +0,0 @@
-/* Copyright (c) 2007-2008 CSIRO
-   Copyright (c) 2007-2009 Xiph.Org Foundation
-   Written by Jean-Marc Valin */
-/*
-   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 "mathops.h"
-#include "cwrs.h"
-#include "vq.h"
-#include "arch.h"
-#include "os_support.h"
-#include "bands.h"
-#include "rate.h"
-
-static void exp_rotation1(celt_norm *X, int len, int stride, opus_val16 c, opus_val16 s)
-{
-   int i;
-   celt_norm *Xptr;
-   Xptr = X;
-   for (i=0;i<len-stride;i++)
-   {
-      celt_norm x1, x2;
-      x1 = Xptr[0];
-      x2 = Xptr[stride];
-      Xptr[stride] = EXTRACT16(SHR32(MULT16_16(c,x2) + MULT16_16(s,x1), 15));
-      *Xptr++      = EXTRACT16(SHR32(MULT16_16(c,x1) - MULT16_16(s,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(SHR32(MULT16_16(c,x2) + MULT16_16(s,x1), 15));
-      *Xptr--      = EXTRACT16(SHR32(MULT16_16(c,x1) - MULT16_16(s,x2), 15));
-   }
-}
-
-static void exp_rotation(celt_norm *X, int len, int dir, int stride, int K, int spread)
-{
-   static const int SPREAD_FACTOR[3]={15,10,5};
-   int i;
-   opus_val16 c, s;
-   opus_val16 gain, theta;
-   int stride2=0;
-   int factor;
-
-   if (2*K>=len || spread==SPREAD_NONE)
-      return;
-   factor = SPREAD_FACTOR[spread-1];
-
-   gain = celt_div((opus_val32)MULT16_16(Q15_ONE,len),(opus_val32)(len+factor*K));
-   theta = HALF16(MULT16_16_Q15(gain,gain));
-
-   c = celt_cos_norm(EXTEND32(theta));
-   s = celt_cos_norm(EXTEND32(SUB16(Q15ONE,theta))); /*  sin(theta) */
-
-   if (len>=8*stride)
-   {
-      stride2 = 1;
-      /* This is just a simple (equivalent) way of computing sqrt(len/stride) with rounding.
-         It's basically incrementing long as (stride2+0.5)^2 < len/stride. */
-      while ((stride2*stride2+stride2)*stride + (stride>>2) < len)
-         stride2++;
-   }
-   /*NOTE: As a minor optimization, we could be passing around log2(B), not B, for both this and for
-      extract_collapse_mask().*/
-   len /= stride;
-   for (i=0;i<stride;i++)
-   {
-      if (dir < 0)
-      {
-         if (stride2)
-            exp_rotation1(X+i*len, len, stride2, s, c);
-         exp_rotation1(X+i*len, len, 1, c, s);
-      } else {
-         exp_rotation1(X+i*len, len, 1, c, -s);
-         if (stride2)
-            exp_rotation1(X+i*len, len, stride2, s, -c);
-      }
-   }
-}
-
-/** Takes the pitch vector and the decoded residual vector, computes the gain
-    that will give ||p+g*y||=1 and mixes the residual with the pitch. */
-static void normalise_residual(int * OPUS_RESTRICT iy, celt_norm * OPUS_RESTRICT X,
-      int N, opus_val32 Ryy, opus_val16 gain)
-{
-   int i;
-#ifdef FIXED_POINT
-   int k;
-#endif
-   opus_val32 t;
-   opus_val16 g;
-
-#ifdef FIXED_POINT
-   k = celt_ilog2(Ryy)>>1;
-#endif
-   t = VSHR32(Ryy, 2*(k-7));
-   g = MULT16_16_P15(celt_rsqrt_norm(t),gain);
-
-   i=0;
-   do
-      X[i] = EXTRACT16(PSHR32(MULT16_16(g, iy[i]), k+1));
-   while (++i < N);
-}
-
-static unsigned extract_collapse_mask(int *iy, int N, int B)
-{
-   unsigned collapse_mask;
-   int N0;
-   int i;
-   if (B<=1)
-      return 1;
-   /*NOTE: As a minor optimization, we could be passing around log2(B), not B, for both this and for
-      exp_rotation().*/
-   N0 = N/B;
-   collapse_mask = 0;
-   i=0; do {
-      int j;
-      j=0; do {
-         collapse_mask |= (iy[i*N0+j]!=0)<<i;
-      } while (++j<N0);
-   } while (++i<B);
-   return collapse_mask;
-}
-
-unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B, ec_enc *enc
-#ifdef RESYNTH
-   , opus_val16 gain
-#endif
-   )
-{
-   VARDECL(celt_norm, y);
-   VARDECL(int, iy);
-   VARDECL(opus_val16, signx);
-   int i, j;
-   opus_val16 s;
-   int pulsesLeft;
-   opus_val32 sum;
-   opus_val32 xy;
-   opus_val16 yy;
-   unsigned collapse_mask;
-   SAVE_STACK;
-
-   celt_assert2(K>0, "alg_quant() needs at least one pulse");
-   celt_assert2(N>1, "alg_quant() needs at least two dimensions");
-
-   ALLOC(y, N, celt_norm);
-   ALLOC(iy, N, int);
-   ALLOC(signx, N, opus_val16);
-
-   exp_rotation(X, N, 1, B, K, spread);
-
-   /* Get rid of the sign */
-   sum = 0;
-   j=0; do {
-      if (X[j]>0)
-         signx[j]=1;
-      else {
-         signx[j]=-1;
-         X[j]=-X[j];
-      }
-      iy[j] = 0;
-      y[j] = 0;
-   } while (++j<N);
-
-   xy = yy = 0;
-
-   pulsesLeft = K;
-
-   /* Do a pre-search by projecting on the pyramid */
-   if (K > (N>>1))
-   {
-      opus_val16 rcp;
-      j=0; do {
-         sum += X[j];
-      }  while (++j<N);
-
-      /* If X is too small, just replace it with a pulse at 0 */
-#ifdef FIXED_POINT
-      if (sum <= K)
-#else
-      /* Prevents infinities and NaNs from causing too many pulses
-         to be allocated. 64 is an approximation of infinity here. */
-      if (!(sum > EPSILON && sum < 64))
-#endif
-      {
-         X[0] = QCONST16(1.f,14);
-         j=1; do
-            X[j]=0;
-         while (++j<N);
-         sum = QCONST16(1.f,14);
-      }
-      rcp = EXTRACT16(MULT16_32_Q16(K-1, celt_rcp(sum)));
-      j=0; do {
-#ifdef FIXED_POINT
-         /* It's really important to round *towards zero* here */
-         iy[j] = MULT16_16_Q15(X[j],rcp);
-#else
-         iy[j] = (int)floor(rcp*X[j]);
-#endif
-         y[j] = (celt_norm)iy[j];
-         yy = MAC16_16(yy, y[j],y[j]);
-         xy = MAC16_16(xy, X[j],y[j]);
-         y[j] *= 2;
-         pulsesLeft -= iy[j];
-      }  while (++j<N);
-   }
-   celt_assert2(pulsesLeft>=1, "Allocated too many pulses in the quick pass");
-
-   /* This should never happen, but just in case it does (e.g. on silence)
-      we fill the first bin with pulses. */
-#ifdef FIXED_POINT_DEBUG
-   celt_assert2(pulsesLeft<=N+3, "Not enough pulses in the quick pass");
-#endif
-   if (pulsesLeft > N+3)
-   {
-      opus_val16 tmp = (opus_val16)pulsesLeft;
-      yy = MAC16_16(yy, tmp, tmp);
-      yy = MAC16_16(yy, tmp, y[0]);
-      iy[0] += pulsesLeft;
-      pulsesLeft=0;
-   }
-
-   s = 1;
-   for (i=0;i<pulsesLeft;i++)
-   {
-      int best_id;
-      opus_val32 best_num = -VERY_LARGE16;
-      opus_val16 best_den = 0;
-#ifdef FIXED_POINT
-      int rshift;
-#endif
-#ifdef FIXED_POINT
-      rshift = 1+celt_ilog2(K-pulsesLeft+i+1);
-#endif
-      best_id = 0;
-      /* The squared magnitude term gets added anyway, so we might as well
-         add it outside the loop */
-      yy = ADD32(yy, 1);
-      j=0;
-      do {
-         opus_val16 Rxy, Ryy;
-         /* Temporary sums of the new pulse(s) */
-         Rxy = EXTRACT16(SHR32(ADD32(xy, EXTEND32(X[j])),rshift));
-         /* We're multiplying y[j] by two so we don't have to do it here */
-         Ryy = ADD16(yy, y[j]);
-
-         /* Approximate score: we maximise Rxy/sqrt(Ryy) (we're guaranteed that
-            Rxy is positive because the sign is pre-computed) */
-         Rxy = MULT16_16_Q15(Rxy,Rxy);
-         /* The idea is to check for num/den >= best_num/best_den, but that way
-            we can do it without any division */
-         /* OPT: Make sure to use conditional moves here */
-         if (MULT16_16(best_den, Rxy) > MULT16_16(Ryy, best_num))
-         {
-            best_den = Ryy;
-            best_num = Rxy;
-            best_id = j;
-         }
-      } while (++j<N);
-
-      /* Updating the sums of the new pulse(s) */
-      xy = ADD32(xy, EXTEND32(X[best_id]));
-      /* We're multiplying y[j] by two so we don't have to do it here */
-      yy = ADD16(yy, y[best_id]);
-
-      /* Only now that we've made the final choice, update y/iy */
-      /* Multiplying y[j] by 2 so we don't have to do it everywhere else */
-      y[best_id] += 2*s;
-      iy[best_id]++;
-   }
-
-   /* Put the original sign back */
-   j=0;
-   do {
-      X[j] = MULT16_16(signx[j],X[j]);
-      if (signx[j] < 0)
-         iy[j] = -iy[j];
-   } while (++j<N);
-   encode_pulses(iy, N, K, enc);
-
-#ifdef RESYNTH
-   normalise_residual(iy, X, N, yy, gain);
-   exp_rotation(X, N, -1, B, K, spread);
-#endif
-
-   collapse_mask = extract_collapse_mask(iy, N, B);
-   RESTORE_STACK;
-   return collapse_mask;
-}
-
-/** Decode pulse vector and combine the result with the pitch vector to produce
-    the final normalised signal in the current band. */
-unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B,
-      ec_dec *dec, opus_val16 gain)
-{
-   int i;
-   opus_val32 Ryy;
-   unsigned collapse_mask;
-   VARDECL(int, iy);
-   SAVE_STACK;
-
-   celt_assert2(K>0, "alg_unquant() needs at least one pulse");
-   celt_assert2(N>1, "alg_unquant() needs at least two dimensions");
-   ALLOC(iy, N, int);
-   decode_pulses(iy, N, K, dec);
-   Ryy = 0;
-   i=0;
-   do {
-      Ryy = MAC16_16(Ryy, iy[i], iy[i]);
-   } while (++i < N);
-   normalise_residual(iy, X, N, Ryy, gain);
-   exp_rotation(X, N, -1, B, K, spread);
-   collapse_mask = extract_collapse_mask(iy, N, B);
-   RESTORE_STACK;
-   return collapse_mask;
-}
-
-void renormalise_vector(celt_norm *X, int N, opus_val16 gain)
-{
-   int i;
-#ifdef FIXED_POINT
-   int k;
-#endif
-   opus_val32 E = EPSILON;
-   opus_val16 g;
-   opus_val32 t;
-   celt_norm *xptr = X;
-   for (i=0;i<N;i++)
-   {
-      E = MAC16_16(E, *xptr, *xptr);
-      xptr++;
-   }
-#ifdef FIXED_POINT
-   k = celt_ilog2(E)>>1;
-#endif
-   t = VSHR32(E, 2*(k-7));
-   g = MULT16_16_P15(celt_rsqrt_norm(t),gain);
-
-   xptr = X;
-   for (i=0;i<N;i++)
-   {
-      *xptr = EXTRACT16(PSHR32(MULT16_16(g, *xptr), k+1));
-      xptr++;
-   }
-   /*return celt_sqrt(E);*/
-}
-
-int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N)
-{
-   int i;
-   int itheta;
-   opus_val16 mid, side;
-   opus_val32 Emid, Eside;
-
-   Emid = Eside = EPSILON;
-   if (stereo)
-   {
-      for (i=0;i<N;i++)
-      {
-         celt_norm m, s;
-         m = ADD16(SHR16(X[i],1),SHR16(Y[i],1));
-         s = SUB16(SHR16(X[i],1),SHR16(Y[i],1));
-         Emid = MAC16_16(Emid, m, m);
-         Eside = MAC16_16(Eside, s, s);
-      }
-   } else {
-      for (i=0;i<N;i++)
-      {
-         celt_norm m, s;
-         m = X[i];
-         s = Y[i];
-         Emid = MAC16_16(Emid, m, m);
-         Eside = MAC16_16(Eside, s, s);
-      }
-   }
-   mid = celt_sqrt(Emid);
-   side = celt_sqrt(Eside);
-#ifdef FIXED_POINT
-   /* 0.63662 = 2/pi */
-   itheta = MULT16_16_Q15(QCONST16(0.63662f,15),celt_atan2p(side, mid));
-#else
-   itheta = (int)floor(.5f+16384*0.63662f*atan2(side,mid));
-#endif
-
-   return itheta;
-}
-- 
cgit