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diff --git a/media/libopus/silk/quant_LTP_gains.c b/media/libopus/silk/quant_LTP_gains.c
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+/***********************************************************************
+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"
+#include "tuning_parameters.h"
+
+void silk_quant_LTP_gains(
+ opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */
+ opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */
+ opus_int8 *periodicity_index, /* O Periodicity Index */
+ opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
+ opus_int *pred_gain_dB_Q7, /* O LTP prediction gain */
+ const opus_int32 XX_Q17[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Correlation matrix in Q18 */
+ const opus_int32 xX_Q17[ MAX_NB_SUBFR*LTP_ORDER ], /* I Correlation vector in Q18 */
+ const opus_int subfr_len, /* I Number of samples per subframe */
+ const opus_int nb_subfr, /* I Number of subframes */
+ int arch /* I Run-time architecture */
+)
+{
+ opus_int j, k, cbk_size;
+ opus_int8 temp_idx[ MAX_NB_SUBFR ];
+ const opus_uint8 *cl_ptr_Q5;
+ const opus_int8 *cbk_ptr_Q7;
+ const opus_uint8 *cbk_gain_ptr_Q7;
+ const opus_int32 *XX_Q17_ptr, *xX_Q17_ptr;
+ opus_int32 res_nrg_Q15_subfr, res_nrg_Q15, rate_dist_Q7_subfr, rate_dist_Q7, min_rate_dist_Q7;
+ opus_int32 sum_log_gain_tmp_Q7, best_sum_log_gain_Q7, max_gain_Q7;
+ opus_int gain_Q7;
+
+ /***************************************************/
+ /* iterate over different codebooks with different */
+ /* rates/distortions, and choose best */
+ /***************************************************/
+ min_rate_dist_Q7 = silk_int32_MAX;
+ best_sum_log_gain_Q7 = 0;
+ for( k = 0; k < 3; k++ ) {
+ /* Safety margin for pitch gain control, to take into account factors
+ such as state rescaling/rewhitening. */
+ opus_int32 gain_safety = SILK_FIX_CONST( 0.4, 7 );
+
+ cl_ptr_Q5 = silk_LTP_gain_BITS_Q5_ptrs[ k ];
+ cbk_ptr_Q7 = silk_LTP_vq_ptrs_Q7[ k ];
+ cbk_gain_ptr_Q7 = silk_LTP_vq_gain_ptrs_Q7[ k ];
+ cbk_size = silk_LTP_vq_sizes[ k ];
+
+ /* Set up pointers to first subframe */
+ XX_Q17_ptr = XX_Q17;
+ xX_Q17_ptr = xX_Q17;
+
+ res_nrg_Q15 = 0;
+ rate_dist_Q7 = 0;
+ sum_log_gain_tmp_Q7 = *sum_log_gain_Q7;
+ for( j = 0; j < nb_subfr; j++ ) {
+ max_gain_Q7 = silk_log2lin( ( SILK_FIX_CONST( MAX_SUM_LOG_GAIN_DB / 6.0, 7 ) - sum_log_gain_tmp_Q7 )
+ + SILK_FIX_CONST( 7, 7 ) ) - gain_safety;
+ silk_VQ_WMat_EC(
+ &temp_idx[ j ], /* O index of best codebook vector */
+ &res_nrg_Q15_subfr, /* O residual energy */
+ &rate_dist_Q7_subfr, /* O best weighted quantization error + mu * rate */
+ &gain_Q7, /* O sum of absolute LTP coefficients */
+ XX_Q17_ptr, /* I correlation matrix */
+ xX_Q17_ptr, /* I correlation vector */
+ cbk_ptr_Q7, /* I codebook */
+ cbk_gain_ptr_Q7, /* I codebook effective gains */
+ cl_ptr_Q5, /* I code length for each codebook vector */
+ subfr_len, /* I number of samples per subframe */
+ max_gain_Q7, /* I maximum sum of absolute LTP coefficients */
+ cbk_size, /* I number of vectors in codebook */
+ arch /* I Run-time architecture */
+ );
+
+ res_nrg_Q15 = silk_ADD_POS_SAT32( res_nrg_Q15, res_nrg_Q15_subfr );
+ rate_dist_Q7 = silk_ADD_POS_SAT32( rate_dist_Q7, rate_dist_Q7_subfr );
+ sum_log_gain_tmp_Q7 = silk_max(0, sum_log_gain_tmp_Q7
+ + silk_lin2log( gain_safety + gain_Q7 ) - SILK_FIX_CONST( 7, 7 ));
+
+ XX_Q17_ptr += LTP_ORDER * LTP_ORDER;
+ xX_Q17_ptr += LTP_ORDER;
+ }
+
+ if( rate_dist_Q7 <= min_rate_dist_Q7 ) {
+ min_rate_dist_Q7 = rate_dist_Q7;
+ *periodicity_index = (opus_int8)k;
+ silk_memcpy( cbk_index, temp_idx, nb_subfr * sizeof( opus_int8 ) );
+ best_sum_log_gain_Q7 = sum_log_gain_tmp_Q7;
+ }
+ }
+
+ cbk_ptr_Q7 = silk_LTP_vq_ptrs_Q7[ *periodicity_index ];
+ for( j = 0; j < nb_subfr; j++ ) {
+ for( k = 0; k < LTP_ORDER; k++ ) {
+ B_Q14[ j * LTP_ORDER + k ] = silk_LSHIFT( cbk_ptr_Q7[ cbk_index[ j ] * LTP_ORDER + k ], 7 );
+ }
+ }
+
+ if( nb_subfr == 2 ) {
+ res_nrg_Q15 = silk_RSHIFT32( res_nrg_Q15, 1 );
+ } else {
+ res_nrg_Q15 = silk_RSHIFT32( res_nrg_Q15, 2 );
+ }
+
+ *sum_log_gain_Q7 = best_sum_log_gain_Q7;
+ *pred_gain_dB_Q7 = (opus_int)silk_SMULBB( -3, silk_lin2log( res_nrg_Q15 ) - ( 15 << 7 ) );
+}