1885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************************************************************** 2885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCopyright (c) 2006-2011, Skype Limited. All rights reserved. 3885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgRedistribution and use in source and binary forms, with or without 4885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgmodification, are permitted provided that the following conditions 5885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgare met: 6885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions of source code must retain the above copyright notice, 7885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgthis list of conditions and the following disclaimer. 8885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions in binary form must reproduce the above copyright 9885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnotice, this list of conditions and the following disclaimer in the 10885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgdocumentation and/or other materials provided with the distribution. 11e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org- Neither the name of Internet Society, IETF or IETF Trust, nor the 12885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnames of specific contributors, may be used to endorse or promote 13885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgproducts derived from this software without specific prior written 14885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgpermission. 15e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgLIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgPOSSIBILITY OF SUCH DAMAGE. 26885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org***********************************************************************/ 27885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 28885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#ifdef HAVE_CONFIG_H 29885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "config.h" 30885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 31885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 32885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "main.h" 33885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */ 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_NLSF_VQ( 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 err_Q26[], /* O Quantization errors [K] */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */ 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */ 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int K, /* I Number of codebook vectors */ 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int LPC_order /* I Number of LPCs */ 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, m; 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 diff_Q15, sum_error_Q30, sum_error_Q26; 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( LPC_order <= 16 ); 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( ( LPC_order & 1 ) == 0 ); 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Loop over codebook */ 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < K; i++ ) { 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sum_error_Q26 = 0; 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( m = 0; m < LPC_order; m += 2 ) { 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Compute weighted squared quantization error for index m */ 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m ], (opus_int32)*pCB_Q8++, 7 ); /* range: [ -32767 : 32767 ]*/ 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sum_error_Q30 = silk_SMULBB( diff_Q15, diff_Q15 ); 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 57885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Compute weighted squared quantization error for index m + 1 */ 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org diff_Q15 = silk_SUB_LSHIFT32( in_Q15[m + 1], (opus_int32)*pCB_Q8++, 7 ); /* range: [ -32767 : 32767 ]*/ 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sum_error_Q30 = silk_SMLABB( sum_error_Q30, diff_Q15, diff_Q15 ); 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sum_error_Q26 = silk_ADD_RSHIFT32( sum_error_Q26, sum_error_Q30, 4 ); 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( sum_error_Q26 >= 0 ); 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( sum_error_Q30 >= 0 ); 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org err_Q26[ i ] = sum_error_Q26; 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 69