Upgrade opus 1.0.2 -> 1.1

1 files changed, 0 insertions, 439 deletions

diff --git a/src/opus-1.0.2/silk/NSQ.c b/src/opus-1.0.2/silk/NSQ.c
deleted file mode 100644
index b49cdf58..00000000
--- a/src/opus-1.0.2/silk/NSQ.c
+++ /dev/null
@@ -1,439 +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.
-***********************************************************************/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "main.h"
-
-static inline void silk_nsq_scale_states(
-    const silk_encoder_state *psEncC,           /* I    Encoder State                   */
-    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
-    const opus_int32    x_Q3[],                 /* I    input in Q3                     */
-    opus_int32          x_sc_Q10[],             /* O    input scaled with 1/Gain        */
-    const opus_int16    sLTP[],                 /* I    re-whitened LTP state in Q0     */
-    opus_int32          sLTP_Q15[],             /* O    LTP state matching scaled input */
-    opus_int            subfr,                  /* I    subframe number                 */
-    const opus_int      LTP_scale_Q14,          /* I                                    */
-    const opus_int32    Gains_Q16[ MAX_NB_SUBFR ], /* I                                 */
-    const opus_int      pitchL[ MAX_NB_SUBFR ], /* I    Pitch lag                       */
-    const opus_int      signal_type             /* I    Signal type                     */
-);
-
-static inline void silk_noise_shape_quantizer(
-    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
-    opus_int            signalType,             /* I    Signal type                     */
-    const opus_int32    x_sc_Q10[],             /* I                                    */
-    opus_int8           pulses[],               /* O                                    */
-    opus_int16          xq[],                   /* O                                    */
-    opus_int32          sLTP_Q15[],             /* I/O  LTP state                       */
-    const opus_int16    a_Q12[],                /* I    Short term prediction coefs     */
-    const opus_int16    b_Q14[],                /* I    Long term prediction coefs      */
-    const opus_int16    AR_shp_Q13[],           /* I    Noise shaping AR coefs          */
-    opus_int            lag,                    /* I    Pitch lag                       */
-    opus_int32          HarmShapeFIRPacked_Q14, /* I                                    */
-    opus_int            Tilt_Q14,               /* I    Spectral tilt                   */
-    opus_int32          LF_shp_Q14,             /* I                                    */
-    opus_int32          Gain_Q16,               /* I                                    */
-    opus_int            Lambda_Q10,             /* I                                    */
-    opus_int            offset_Q10,             /* I                                    */
-    opus_int            length,                 /* I    Input length                    */
-    opus_int            shapingLPCOrder,        /* I    Noise shaping AR filter order   */
-    opus_int            predictLPCOrder         /* I    Prediction filter order         */
-);
-
-void silk_NSQ(
-    const silk_encoder_state    *psEncC,                                    /* I/O  Encoder State                   */
-    silk_nsq_state              *NSQ,                                       /* I/O  NSQ state                       */
-    SideInfoIndices             *psIndices,                                 /* I/O  Quantization Indices            */
-    const opus_int32            x_Q3[],                                     /* I    Prefiltered input signal        */
-    opus_int8                   pulses[],                                   /* O    Quantized pulse signal          */
-    const opus_int16            PredCoef_Q12[ 2 * MAX_LPC_ORDER ],          /* I    Short term prediction coefs     */
-    const opus_int16            LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],    /* I    Long term prediction coefs      */
-    const opus_int16            AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs             */
-    const opus_int              HarmShapeGain_Q14[ MAX_NB_SUBFR ],          /* I    Long term shaping coefs         */
-    const opus_int              Tilt_Q14[ MAX_NB_SUBFR ],                   /* I    Spectral tilt                   */
-    const opus_int32            LF_shp_Q14[ MAX_NB_SUBFR ],                 /* I    Low frequency shaping coefs     */
-    const opus_int32            Gains_Q16[ MAX_NB_SUBFR ],                  /* I    Quantization step sizes         */
-    const opus_int              pitchL[ MAX_NB_SUBFR ],                     /* I    Pitch lags                      */
-    const opus_int              Lambda_Q10,                                 /* I    Rate/distortion tradeoff        */
-    const opus_int              LTP_scale_Q14                               /* I    LTP state scaling               */
-)
-{
-    opus_int            k, lag, start_idx, LSF_interpolation_flag;
-    const opus_int16    *A_Q12, *B_Q14, *AR_shp_Q13;
-    opus_int16          *pxq;
-    opus_int32          sLTP_Q15[ 2 * MAX_FRAME_LENGTH ];
-    opus_int16          sLTP[     2 * MAX_FRAME_LENGTH ];
-    opus_int32          HarmShapeFIRPacked_Q14;
-    opus_int            offset_Q10;
-    opus_int32          x_sc_Q10[ MAX_SUB_FRAME_LENGTH ];
-
-    NSQ->rand_seed = psIndices->Seed;
-
-    /* Set unvoiced lag to the previous one, overwrite later for voiced */
-    lag = NSQ->lagPrev;
-
-    silk_assert( NSQ->prev_gain_Q16 != 0 );
-
-    offset_Q10 = silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ];
-
-    if( psIndices->NLSFInterpCoef_Q2 == 4 ) {
-        LSF_interpolation_flag = 0;
-    } else {
-        LSF_interpolation_flag = 1;
-    }
-
-    /* Set up pointers to start of sub frame */
-    NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length;
-    NSQ->sLTP_buf_idx     = psEncC->ltp_mem_length;
-    pxq                   = &NSQ->xq[ psEncC->ltp_mem_length ];
-    for( k = 0; k < psEncC->nb_subfr; k++ ) {
-        A_Q12      = &PredCoef_Q12[ (( k >> 1 ) | ( 1 - LSF_interpolation_flag )) * MAX_LPC_ORDER ];
-        B_Q14      = &LTPCoef_Q14[ k * LTP_ORDER ];
-        AR_shp_Q13 = &AR2_Q13[     k * MAX_SHAPE_LPC_ORDER ];
-
-        /* Noise shape parameters */
-        silk_assert( HarmShapeGain_Q14[ k ] >= 0 );
-        HarmShapeFIRPacked_Q14  =                          silk_RSHIFT( HarmShapeGain_Q14[ k ], 2 );
-        HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 );
-
-        NSQ->rewhite_flag = 0;
-        if( psIndices->signalType == TYPE_VOICED ) {
-            /* Voiced */
-            lag = pitchL[ k ];
-
-            /* Re-whitening */
-            if( ( k & ( 3 - silk_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) {
-                /* Rewhiten with new A coefs */
-                start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2;
-                silk_assert( start_idx > 0 );
-
-                silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ],
-                    A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder );
-
-                NSQ->rewhite_flag = 1;
-                NSQ->sLTP_buf_idx = psEncC->ltp_mem_length;
-            }
-        }
-
-        silk_nsq_scale_states( psEncC, NSQ, x_Q3, x_sc_Q10, sLTP, sLTP_Q15, k, LTP_scale_Q14, Gains_Q16, pitchL, psIndices->signalType );
-
-        silk_noise_shape_quantizer( NSQ, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, A_Q12, B_Q14,
-            AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], Gains_Q16[ k ], Lambda_Q10,
-            offset_Q10, psEncC->subfr_length, psEncC->shapingLPCOrder, psEncC->predictLPCOrder );
-
-        x_Q3   += psEncC->subfr_length;
-        pulses += psEncC->subfr_length;
-        pxq    += psEncC->subfr_length;
-    }
-
-    /* Update lagPrev for next frame */
-    NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ];
-
-    /* Save quantized speech and noise shaping signals */
-    /* DEBUG_STORE_DATA( enc.pcm, &NSQ->xq[ psEncC->ltp_mem_length ], psEncC->frame_length * sizeof( opus_int16 ) ) */
-    silk_memmove( NSQ->xq,           &NSQ->xq[           psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int16 ) );
-    silk_memmove( NSQ->sLTP_shp_Q14, &NSQ->sLTP_shp_Q14[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int32 ) );
-}
-
-/***********************************/
-/* silk_noise_shape_quantizer  */
-/***********************************/
-static inline void silk_noise_shape_quantizer(
-    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
-    opus_int            signalType,             /* I    Signal type                     */
-    const opus_int32    x_sc_Q10[],             /* I                                    */
-    opus_int8           pulses[],               /* O                                    */
-    opus_int16          xq[],                   /* O                                    */
-    opus_int32          sLTP_Q15[],             /* I/O  LTP state                       */
-    const opus_int16    a_Q12[],                /* I    Short term prediction coefs     */
-    const opus_int16    b_Q14[],                /* I    Long term prediction coefs      */
-    const opus_int16    AR_shp_Q13[],           /* I    Noise shaping AR coefs          */
-    opus_int            lag,                    /* I    Pitch lag                       */
-    opus_int32          HarmShapeFIRPacked_Q14, /* I                                    */
-    opus_int            Tilt_Q14,               /* I    Spectral tilt                   */
-    opus_int32          LF_shp_Q14,             /* I                                    */
-    opus_int32          Gain_Q16,               /* I                                    */
-    opus_int            Lambda_Q10,             /* I                                    */
-    opus_int            offset_Q10,             /* I                                    */
-    opus_int            length,                 /* I    Input length                    */
-    opus_int            shapingLPCOrder,        /* I    Noise shaping AR filter order   */
-    opus_int            predictLPCOrder         /* I    Prediction filter order         */
-)
-{
-    opus_int     i, j;
-    opus_int32   LTP_pred_Q13, LPC_pred_Q10, n_AR_Q12, n_LTP_Q13;
-    opus_int32   n_LF_Q12, r_Q10, rr_Q10, q1_Q0, q1_Q10, q2_Q10, rd1_Q20, rd2_Q20;
-    opus_int32   exc_Q14, LPC_exc_Q14, xq_Q14, Gain_Q10;
-    opus_int32   tmp1, tmp2, sLF_AR_shp_Q14;
-    opus_int32   *psLPC_Q14, *shp_lag_ptr, *pred_lag_ptr;
-
-    shp_lag_ptr  = &NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ];
-    pred_lag_ptr = &sLTP_Q15[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ];
-    Gain_Q10     = silk_RSHIFT( Gain_Q16, 6 );
-
-    /* Set up short term AR state */
-    psLPC_Q14 = &NSQ->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 ];
-
-    for( i = 0; i < length; i++ ) {
-        /* Generate dither */
-        NSQ->rand_seed = silk_RAND( NSQ->rand_seed );
-
-        /* Short-term prediction */
-        silk_assert( predictLPCOrder == 10 || predictLPCOrder == 16 );
-        /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */
-        LPC_pred_Q10 = silk_RSHIFT( predictLPCOrder, 1 );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[  0 ], a_Q12[ 0 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -1 ], a_Q12[ 1 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -2 ], a_Q12[ 2 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -3 ], a_Q12[ 3 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -4 ], a_Q12[ 4 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -5 ], a_Q12[ 5 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -6 ], a_Q12[ 6 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -7 ], a_Q12[ 7 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -8 ], a_Q12[ 8 ] );
-        LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -9 ], a_Q12[ 9 ] );
-        if( predictLPCOrder == 16 ) {
-            LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -10 ], a_Q12[ 10 ] );
-            LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -11 ], a_Q12[ 11 ] );
-            LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -12 ], a_Q12[ 12 ] );
-            LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -13 ], a_Q12[ 13 ] );
-            LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -14 ], a_Q12[ 14 ] );
-            LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -15 ], a_Q12[ 15 ] );
-        }
-
-        /* Long-term prediction */
-        if( signalType == TYPE_VOICED ) {
-            /* Unrolled loop */
-            /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */
-            LTP_pred_Q13 = 2;
-            LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[  0 ], b_Q14[ 0 ] );
-            LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -1 ], b_Q14[ 1 ] );
-            LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -2 ], b_Q14[ 2 ] );
-            LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -3 ], b_Q14[ 3 ] );
-            LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -4 ], b_Q14[ 4 ] );
-            pred_lag_ptr++;
-        } else {
-            LTP_pred_Q13 = 0;
-        }
-
-        /* Noise shape feedback */
-        silk_assert( ( shapingLPCOrder & 1 ) == 0 );   /* check that order is even */
-        tmp2 = psLPC_Q14[ 0 ];
-        tmp1 = NSQ->sAR2_Q14[ 0 ];
-        NSQ->sAR2_Q14[ 0 ] = tmp2;
-        n_AR_Q12 = silk_RSHIFT( shapingLPCOrder, 1 );
-        n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp2, AR_shp_Q13[ 0 ] );
-        for( j = 2; j < shapingLPCOrder; j += 2 ) {
-            tmp2 = NSQ->sAR2_Q14[ j - 1 ];
-            NSQ->sAR2_Q14[ j - 1 ] = tmp1;
-            n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp1, AR_shp_Q13[ j - 1 ] );
-            tmp1 = NSQ->sAR2_Q14[ j + 0 ];
-            NSQ->sAR2_Q14[ j + 0 ] = tmp2;
-            n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp2, AR_shp_Q13[ j ] );
-        }
-        NSQ->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1;
-        n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] );
-
-        n_AR_Q12 = silk_LSHIFT32( n_AR_Q12, 1 );                                /* Q11 -> Q12 */
-        n_AR_Q12 = silk_SMLAWB( n_AR_Q12, NSQ->sLF_AR_shp_Q14, Tilt_Q14 );
-
-        n_LF_Q12 = silk_SMULWB( NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - 1 ], LF_shp_Q14 );
-        n_LF_Q12 = silk_SMLAWT( n_LF_Q12, NSQ->sLF_AR_shp_Q14, LF_shp_Q14 );
-
-        silk_assert( lag > 0 || signalType != TYPE_VOICED );
-
-        /* Combine prediction and noise shaping signals */
-        tmp1 = silk_SUB32( silk_LSHIFT32( LPC_pred_Q10, 2 ), n_AR_Q12 );        /* Q12 */
-        tmp1 = silk_SUB32( tmp1, n_LF_Q12 );                                    /* Q12 */
-        if( lag > 0 ) {
-            /* Symmetric, packed FIR coefficients */
-            n_LTP_Q13 = silk_SMULWB( silk_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 );
-            n_LTP_Q13 = silk_SMLAWT( n_LTP_Q13, shp_lag_ptr[ -1 ],                      HarmShapeFIRPacked_Q14 );
-            n_LTP_Q13 = silk_LSHIFT( n_LTP_Q13, 1 );
-            shp_lag_ptr++;
-
-            tmp2 = silk_SUB32( LTP_pred_Q13, n_LTP_Q13 );                       /* Q13 */
-            tmp1 = silk_ADD_LSHIFT32( tmp2, tmp1, 1 );                          /* Q13 */
-            tmp1 = silk_RSHIFT_ROUND( tmp1, 3 );                                /* Q10 */
-        } else {
-            tmp1 = silk_RSHIFT_ROUND( tmp1, 2 );                                /* Q10 */
-        }
-
-        r_Q10 = silk_SUB32( x_sc_Q10[ i ], tmp1 );                              /* residual error Q10 */
-
-        /* Flip sign depending on dither */
-        if ( NSQ->rand_seed < 0 ) {
-           r_Q10 = -r_Q10;
-        }
-        r_Q10 = silk_LIMIT_32( r_Q10, -(31 << 10), 30 << 10 );
-
-        /* Find two quantization level candidates and measure their rate-distortion */
-        q1_Q10 = silk_SUB32( r_Q10, offset_Q10 );
-        q1_Q0 = silk_RSHIFT( q1_Q10, 10 );
-        if( q1_Q0 > 0 ) {
-            q1_Q10  = silk_SUB32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 );
-            q1_Q10  = silk_ADD32( q1_Q10, offset_Q10 );
-            q2_Q10  = silk_ADD32( q1_Q10, 1024 );
-            rd1_Q20 = silk_SMULBB( q1_Q10, Lambda_Q10 );
-            rd2_Q20 = silk_SMULBB( q2_Q10, Lambda_Q10 );
-        } else if( q1_Q0 == 0 ) {
-            q1_Q10  = offset_Q10;
-            q2_Q10  = silk_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 );
-            rd1_Q20 = silk_SMULBB( q1_Q10, Lambda_Q10 );
-            rd2_Q20 = silk_SMULBB( q2_Q10, Lambda_Q10 );
-        } else if( q1_Q0 == -1 ) {
-            q2_Q10  = offset_Q10;
-            q1_Q10  = silk_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 );
-            rd1_Q20 = silk_SMULBB( -q1_Q10, Lambda_Q10 );
-            rd2_Q20 = silk_SMULBB(  q2_Q10, Lambda_Q10 );
-        } else {            /* Q1_Q0 < -1 */
-            q1_Q10  = silk_ADD32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 );
-            q1_Q10  = silk_ADD32( q1_Q10, offset_Q10 );
-            q2_Q10  = silk_ADD32( q1_Q10, 1024 );
-            rd1_Q20 = silk_SMULBB( -q1_Q10, Lambda_Q10 );
-            rd2_Q20 = silk_SMULBB( -q2_Q10, Lambda_Q10 );
-        }
-        rr_Q10  = silk_SUB32( r_Q10, q1_Q10 );
-        rd1_Q20 = silk_SMLABB( rd1_Q20, rr_Q10, rr_Q10 );
-        rr_Q10  = silk_SUB32( r_Q10, q2_Q10 );
-        rd2_Q20 = silk_SMLABB( rd2_Q20, rr_Q10, rr_Q10 );
-
-        if( rd2_Q20 < rd1_Q20 ) {
-            q1_Q10 = q2_Q10;
-        }
-
-        pulses[ i ] = (opus_int8)silk_RSHIFT_ROUND( q1_Q10, 10 );
-
-        /* Excitation */
-        exc_Q14 = silk_LSHIFT( q1_Q10, 4 );
-        if ( NSQ->rand_seed < 0 ) {
-           exc_Q14 = -exc_Q14;
-        }
-
-        /* Add predictions */
-        LPC_exc_Q14 = silk_ADD_LSHIFT32( exc_Q14, LTP_pred_Q13, 1 );
-        xq_Q14      = silk_ADD_LSHIFT32( LPC_exc_Q14, LPC_pred_Q10, 4 );
-
-        /* Scale XQ back to normal level before saving */
-        xq[ i ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_SMULWW( xq_Q14, Gain_Q10 ), 8 ) );
-
-        /* Update states */
-        psLPC_Q14++;
-        *psLPC_Q14 = xq_Q14;
-        sLF_AR_shp_Q14 = silk_SUB_LSHIFT32( xq_Q14, n_AR_Q12, 2 );
-        NSQ->sLF_AR_shp_Q14 = sLF_AR_shp_Q14;
-
-        NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx ] = silk_SUB_LSHIFT32( sLF_AR_shp_Q14, n_LF_Q12, 2 );
-        sLTP_Q15[ NSQ->sLTP_buf_idx ] = silk_LSHIFT( LPC_exc_Q14, 1 );
-        NSQ->sLTP_shp_buf_idx++;
-        NSQ->sLTP_buf_idx++;
-
-        /* Make dither dependent on quantized signal */
-        NSQ->rand_seed = silk_ADD32_ovflw( NSQ->rand_seed, pulses[ i ] );
-    }
-
-    /* Update LPC synth buffer */
-    silk_memcpy( NSQ->sLPC_Q14, &NSQ->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) );
-}
-
-static inline void silk_nsq_scale_states(
-    const silk_encoder_state *psEncC,           /* I    Encoder State                   */
-    silk_nsq_state      *NSQ,                   /* I/O  NSQ state                       */
-    const opus_int32    x_Q3[],                 /* I    input in Q3                     */
-    opus_int32          x_sc_Q10[],             /* O    input scaled with 1/Gain        */
-    const opus_int16    sLTP[],                 /* I    re-whitened LTP state in Q0     */
-    opus_int32          sLTP_Q15[],             /* O    LTP state matching scaled input */
-    opus_int            subfr,                  /* I    subframe number                 */
-    const opus_int      LTP_scale_Q14,          /* I                                    */
-    const opus_int32    Gains_Q16[ MAX_NB_SUBFR ], /* I                                 */
-    const opus_int      pitchL[ MAX_NB_SUBFR ], /* I    Pitch lag                       */
-    const opus_int      signal_type             /* I    Signal type                     */
-)
-{
-    opus_int   i, lag;
-    opus_int32 gain_adj_Q16, inv_gain_Q31, inv_gain_Q23;
-
-    lag          = pitchL[ subfr ];
-    inv_gain_Q31 = silk_INVERSE32_varQ( silk_max( Gains_Q16[ subfr ], 1 ), 47 );
-    silk_assert( inv_gain_Q31 != 0 );
-
-    /* Calculate gain adjustment factor */
-    if( Gains_Q16[ subfr ] != NSQ->prev_gain_Q16 ) {
-        gain_adj_Q16 =  silk_DIV32_varQ( NSQ->prev_gain_Q16, Gains_Q16[ subfr ], 16 );
-    } else {
-        gain_adj_Q16 = (opus_int32)1 << 16;
-    }
-
-    /* Scale input */
-    inv_gain_Q23 = silk_RSHIFT_ROUND( inv_gain_Q31, 8 );
-    for( i = 0; i < psEncC->subfr_length; i++ ) {
-        x_sc_Q10[ i ] = silk_SMULWW( x_Q3[ i ], inv_gain_Q23 );
-    }
-
-    /* Save inverse gain */
-    NSQ->prev_gain_Q16 = Gains_Q16[ subfr ];
-
-    /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */
-    if( NSQ->rewhite_flag ) {
-        if( subfr == 0 ) {
-            /* Do LTP downscaling */
-            inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, LTP_scale_Q14 ), 2 );
-        }
-        for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
-            silk_assert( i < MAX_FRAME_LENGTH );
-            sLTP_Q15[ i ] = silk_SMULWB( inv_gain_Q31, sLTP[ i ] );
-        }
-    }
-
-    /* Adjust for changing gain */
-    if( gain_adj_Q16 != (opus_int32)1 << 16 ) {
-        /* Scale long-term shaping state */
-        for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) {
-            NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q14[ i ] );
-        }
-
-        /* Scale long-term prediction state */
-        if( signal_type == TYPE_VOICED && NSQ->rewhite_flag == 0 ) {
-            for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
-                sLTP_Q15[ i ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ i ] );
-            }
-        }
-
-        NSQ->sLF_AR_shp_Q14 = silk_SMULWW( gain_adj_Q16, NSQ->sLF_AR_shp_Q14 );
-
-        /* Scale short-term prediction and shaping states */
-        for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) {
-            NSQ->sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLPC_Q14[ i ] );
-        }
-        for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) {
-            NSQ->sAR2_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sAR2_Q14[ i ] );
-        }
-    }
-}