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diff --git a/media/libopus/silk/NLSF_VQ.c b/media/libopus/silk/NLSF_VQ.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"
+
+/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */
+void silk_NLSF_VQ(
+ opus_int32 err_Q24[], /* O Quantization errors [K] */
+ const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */
+ const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */
+ const opus_int16 pWght_Q9[], /* I Codebook weights [K*LPC_order] */
+ const opus_int K, /* I Number of codebook vectors */
+ const opus_int LPC_order /* I Number of LPCs */
+)
+{
+ opus_int i, m;
+ opus_int32 diff_Q15, diffw_Q24, sum_error_Q24, pred_Q24;
+ const opus_int16 *w_Q9_ptr;
+ const opus_uint8 *cb_Q8_ptr;
+
+ celt_assert( ( LPC_order & 1 ) == 0 );
+
+ /* Loop over codebook */
+ cb_Q8_ptr = pCB_Q8;
+ w_Q9_ptr = pWght_Q9;
+ for( i = 0; i < K; i++ ) {
+ sum_error_Q24 = 0;
+ pred_Q24 = 0;
+ for( m = LPC_order-2; m >= 0; m -= 2 ) {
+ /* Compute weighted absolute predictive quantization error for index m + 1 */
+ diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m + 1 ], (opus_int32)cb_Q8_ptr[ m + 1 ], 7 ); /* range: [ -32767 : 32767 ]*/
+ diffw_Q24 = silk_SMULBB( diff_Q15, w_Q9_ptr[ m + 1 ] );
+ sum_error_Q24 = silk_ADD32( sum_error_Q24, silk_abs( silk_SUB_RSHIFT32( diffw_Q24, pred_Q24, 1 ) ) );
+ pred_Q24 = diffw_Q24;
+
+ /* Compute weighted absolute predictive quantization error for index m */
+ diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m ], (opus_int32)cb_Q8_ptr[ m ], 7 ); /* range: [ -32767 : 32767 ]*/
+ diffw_Q24 = silk_SMULBB( diff_Q15, w_Q9_ptr[ m ] );
+ sum_error_Q24 = silk_ADD32( sum_error_Q24, silk_abs( silk_SUB_RSHIFT32( diffw_Q24, pred_Q24, 1 ) ) );
+ pred_Q24 = diffw_Q24;
+
+ silk_assert( sum_error_Q24 >= 0 );
+ }
+ err_Q24[ i ] = sum_error_Q24;
+ cb_Q8_ptr += LPC_order;
+ w_Q9_ptr += LPC_order;
+ }
+}