remove most libraries from the source tree

1 files changed, 0 insertions, 252 deletions

diff --git a/src/opus-1.1/silk/A2NLSF.c b/src/opus-1.1/silk/A2NLSF.c
deleted file mode 100644
index 74b1b95d..00000000
--- a/src/opus-1.1/silk/A2NLSF.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/***********************************************************************
-Copyright (c) 2006-2011, Skype Limited. All rights reserved.
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-- Redistributions of source code must retain the above copyright notice,
-this list of conditions and the following disclaimer.
-- Redistributions in binary form must reproduce the above copyright
-notice, this list of conditions and the following disclaimer in the
-documentation and/or other materials provided with the distribution.
-- Neither the name of Internet Society, IETF or IETF Trust, nor the
-names of specific contributors, may be used to endorse or promote
-products derived from this software without specific prior written
-permission.
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE 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.
-***********************************************************************/
-
-/* Conversion between prediction filter coefficients and NLSFs  */
-/* Requires the order to be an even number                      */
-/* A piecewise linear approximation maps LSF <-> cos(LSF)       */
-/* Therefore the result is not accurate NLSFs, but the two      */
-/* functions are accurate inverses of each other                */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "SigProc_FIX.h"
-#include "tables.h"
-
-/* Number of binary divisions, when not in low complexity mode */
-#define BIN_DIV_STEPS_A2NLSF_FIX      3 /* must be no higher than 16 - log2( LSF_COS_TAB_SZ_FIX ) */
-#define MAX_ITERATIONS_A2NLSF_FIX    30
-
-/* Helper function for A2NLSF(..)                    */
-/* Transforms polynomials from cos(n*f) to cos(f)^n  */
-static OPUS_INLINE void silk_A2NLSF_trans_poly(
-    opus_int32          *p,                     /* I/O    Polynomial                                */
-    const opus_int      dd                      /* I      Polynomial order (= filter order / 2 )    */
-)
-{
-    opus_int k, n;
-
-    for( k = 2; k <= dd; k++ ) {
-        for( n = dd; n > k; n-- ) {
-            p[ n - 2 ] -= p[ n ];
-        }
-        p[ k - 2 ] -= silk_LSHIFT( p[ k ], 1 );
-    }
-}
-/* Helper function for A2NLSF(..) */
-/* Polynomial evaluation          */
-static OPUS_INLINE opus_int32 silk_A2NLSF_eval_poly( /* return the polynomial evaluation, in Q16     */
-    opus_int32          *p,                     /* I    Polynomial, Q16                         */
-    const opus_int32    x,                      /* I    Evaluation point, Q12                   */
-    const opus_int      dd                      /* I    Order                                   */
-)
-{
-    opus_int   n;
-    opus_int32 x_Q16, y32;
-
-    y32 = p[ dd ];                                  /* Q16 */
-    x_Q16 = silk_LSHIFT( x, 4 );
-    for( n = dd - 1; n >= 0; n-- ) {
-        y32 = silk_SMLAWW( p[ n ], y32, x_Q16 );    /* Q16 */
-    }
-    return y32;
-}
-
-static OPUS_INLINE void silk_A2NLSF_init(
-     const opus_int32    *a_Q16,
-     opus_int32          *P,
-     opus_int32          *Q,
-     const opus_int      dd
-)
-{
-    opus_int k;
-
-    /* Convert filter coefs to even and odd polynomials */
-    P[dd] = silk_LSHIFT( 1, 16 );
-    Q[dd] = silk_LSHIFT( 1, 16 );
-    for( k = 0; k < dd; k++ ) {
-        P[ k ] = -a_Q16[ dd - k - 1 ] - a_Q16[ dd + k ];    /* Q16 */
-        Q[ k ] = -a_Q16[ dd - k - 1 ] + a_Q16[ dd + k ];    /* Q16 */
-    }
-
-    /* Divide out zeros as we have that for even filter orders, */
-    /* z =  1 is always a root in Q, and                        */
-    /* z = -1 is always a root in P                             */
-    for( k = dd; k > 0; k-- ) {
-        P[ k - 1 ] -= P[ k ];
-        Q[ k - 1 ] += Q[ k ];
-    }
-
-    /* Transform polynomials from cos(n*f) to cos(f)^n */
-    silk_A2NLSF_trans_poly( P, dd );
-    silk_A2NLSF_trans_poly( Q, dd );
-}
-
-/* Compute Normalized Line Spectral Frequencies (NLSFs) from whitening filter coefficients      */
-/* If not all roots are found, the a_Q16 coefficients are bandwidth expanded until convergence. */
-void silk_A2NLSF(
-    opus_int16                  *NLSF,              /* O    Normalized Line Spectral Frequencies in Q15 (0..2^15-1) [d] */
-    opus_int32                  *a_Q16,             /* I/O  Monic whitening filter coefficients in Q16 [d]              */
-    const opus_int              d                   /* I    Filter order (must be even)                                 */
-)
-{
-    opus_int      i, k, m, dd, root_ix, ffrac;
-    opus_int32 xlo, xhi, xmid;
-    opus_int32 ylo, yhi, ymid, thr;
-    opus_int32 nom, den;
-    opus_int32 P[ SILK_MAX_ORDER_LPC / 2 + 1 ];
-    opus_int32 Q[ SILK_MAX_ORDER_LPC / 2 + 1 ];
-    opus_int32 *PQ[ 2 ];
-    opus_int32 *p;
-
-    /* Store pointers to array */
-    PQ[ 0 ] = P;
-    PQ[ 1 ] = Q;
-
-    dd = silk_RSHIFT( d, 1 );
-
-    silk_A2NLSF_init( a_Q16, P, Q, dd );
-
-    /* Find roots, alternating between P and Q */
-    p = P;                          /* Pointer to polynomial */
-
-    xlo = silk_LSFCosTab_FIX_Q12[ 0 ]; /* Q12*/
-    ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
-
-    if( ylo < 0 ) {
-        /* Set the first NLSF to zero and move on to the next */
-        NLSF[ 0 ] = 0;
-        p = Q;                      /* Pointer to polynomial */
-        ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
-        root_ix = 1;                /* Index of current root */
-    } else {
-        root_ix = 0;                /* Index of current root */
-    }
-    k = 1;                          /* Loop counter */
-    i = 0;                          /* Counter for bandwidth expansions applied */
-    thr = 0;
-    while( 1 ) {
-        /* Evaluate polynomial */
-        xhi = silk_LSFCosTab_FIX_Q12[ k ]; /* Q12 */
-        yhi = silk_A2NLSF_eval_poly( p, xhi, dd );
-
-        /* Detect zero crossing */
-        if( ( ylo <= 0 && yhi >= thr ) || ( ylo >= 0 && yhi <= -thr ) ) {
-            if( yhi == 0 ) {
-                /* If the root lies exactly at the end of the current       */
-                /* interval, look for the next root in the next interval    */
-                thr = 1;
-            } else {
-                thr = 0;
-            }
-            /* Binary division */
-            ffrac = -256;
-            for( m = 0; m < BIN_DIV_STEPS_A2NLSF_FIX; m++ ) {
-                /* Evaluate polynomial */
-                xmid = silk_RSHIFT_ROUND( xlo + xhi, 1 );
-                ymid = silk_A2NLSF_eval_poly( p, xmid, dd );
-
-                /* Detect zero crossing */
-                if( ( ylo <= 0 && ymid >= 0 ) || ( ylo >= 0 && ymid <= 0 ) ) {
-                    /* Reduce frequency */
-                    xhi = xmid;
-                    yhi = ymid;
-                } else {
-                    /* Increase frequency */
-                    xlo = xmid;
-                    ylo = ymid;
-                    ffrac = silk_ADD_RSHIFT( ffrac, 128, m );
-                }
-            }
-
-            /* Interpolate */
-            if( silk_abs( ylo ) < 65536 ) {
-                /* Avoid dividing by zero */
-                den = ylo - yhi;
-                nom = silk_LSHIFT( ylo, 8 - BIN_DIV_STEPS_A2NLSF_FIX ) + silk_RSHIFT( den, 1 );
-                if( den != 0 ) {
-                    ffrac += silk_DIV32( nom, den );
-                }
-            } else {
-                /* No risk of dividing by zero because abs(ylo - yhi) >= abs(ylo) >= 65536 */
-                ffrac += silk_DIV32( ylo, silk_RSHIFT( ylo - yhi, 8 - BIN_DIV_STEPS_A2NLSF_FIX ) );
-            }
-            NLSF[ root_ix ] = (opus_int16)silk_min_32( silk_LSHIFT( (opus_int32)k, 8 ) + ffrac, silk_int16_MAX );
-
-            silk_assert( NLSF[ root_ix ] >= 0 );
-
-            root_ix++;        /* Next root */
-            if( root_ix >= d ) {
-                /* Found all roots */
-                break;
-            }
-            /* Alternate pointer to polynomial */
-            p = PQ[ root_ix & 1 ];
-
-            /* Evaluate polynomial */
-            xlo = silk_LSFCosTab_FIX_Q12[ k - 1 ]; /* Q12*/
-            ylo = silk_LSHIFT( 1 - ( root_ix & 2 ), 12 );
-        } else {
-            /* Increment loop counter */
-            k++;
-            xlo = xhi;
-            ylo = yhi;
-            thr = 0;
-
-            if( k > LSF_COS_TAB_SZ_FIX ) {
-                i++;
-                if( i > MAX_ITERATIONS_A2NLSF_FIX ) {
-                    /* Set NLSFs to white spectrum and exit */
-                    NLSF[ 0 ] = (opus_int16)silk_DIV32_16( 1 << 15, d + 1 );
-                    for( k = 1; k < d; k++ ) {
-                        NLSF[ k ] = (opus_int16)silk_SMULBB( k + 1, NLSF[ 0 ] );
-                    }
-                    return;
-                }
-
-                /* Error: Apply progressively more bandwidth expansion and run again */
-                silk_bwexpander_32( a_Q16, d, 65536 - silk_SMULBB( 10 + i, i ) ); /* 10_Q16 = 0.00015*/
-
-                silk_A2NLSF_init( a_Q16, P, Q, dd );
-                p = P;                            /* Pointer to polynomial */
-                xlo = silk_LSFCosTab_FIX_Q12[ 0 ]; /* Q12*/
-                ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
-                if( ylo < 0 ) {
-                    /* Set the first NLSF to zero and move on to the next */
-                    NLSF[ 0 ] = 0;
-                    p = Q;                        /* Pointer to polynomial */
-                    ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
-                    root_ix = 1;                  /* Index of current root */
-                } else {
-                    root_ix = 0;                  /* Index of current root */
-                }
-                k = 1;                            /* Reset loop counter */
-            }
-        }
-    }
-}