From aaf1f6659bd32e6bf5b78696512fafccacdcb7eb Mon Sep 17 00:00:00 2001 From: Zack Middleton Date: Sun, 17 Feb 2013 18:33:39 -0600 Subject: Add libopus 1.0.2 and libopusfile 0.2 --- src/opus-1.0.2/silk/fixed/k2a_Q16_FIX.c | 53 +++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/opus-1.0.2/silk/fixed/k2a_Q16_FIX.c (limited to 'src/opus-1.0.2/silk/fixed/k2a_Q16_FIX.c') diff --git a/src/opus-1.0.2/silk/fixed/k2a_Q16_FIX.c b/src/opus-1.0.2/silk/fixed/k2a_Q16_FIX.c new file mode 100644 index 00000000..f96f3064 --- /dev/null +++ b/src/opus-1.0.2/silk/fixed/k2a_Q16_FIX.c @@ -0,0 +1,53 @@ +/*********************************************************************** +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 "SigProc_FIX.h" + +/* Step up function, converts reflection coefficients to prediction coefficients */ +void silk_k2a_Q16( + opus_int32 *A_Q24, /* O Prediction coefficients [order] Q24 */ + const opus_int32 *rc_Q16, /* I Reflection coefficients [order] Q16 */ + const opus_int32 order /* I Prediction order */ +) +{ + opus_int k, n; + opus_int32 Atmp[ SILK_MAX_ORDER_LPC ]; + + for( k = 0; k < order; k++ ) { + for( n = 0; n < k; n++ ) { + Atmp[ n ] = A_Q24[ n ]; + } + for( n = 0; n < k; n++ ) { + A_Q24[ n ] = silk_SMLAWW( A_Q24[ n ], Atmp[ k - n - 1 ], rc_Q16[ k ] ); + } + A_Q24[ k ] = -silk_LSHIFT( rc_Q16[ k ], 8 ); + } +} -- cgit