annotate src/opus-1.3/silk/interpolate.c @ 169:223a55898ab9 tip default

Add null config files
author Chris Cannam <cannam@all-day-breakfast.com>
date Mon, 02 Mar 2020 14:03:47 +0000
parents 4664ac0c1032
children
rev   line source
cannam@154 1 /***********************************************************************
cannam@154 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
cannam@154 3 Redistribution and use in source and binary forms, with or without
cannam@154 4 modification, are permitted provided that the following conditions
cannam@154 5 are met:
cannam@154 6 - Redistributions of source code must retain the above copyright notice,
cannam@154 7 this list of conditions and the following disclaimer.
cannam@154 8 - Redistributions in binary form must reproduce the above copyright
cannam@154 9 notice, this list of conditions and the following disclaimer in the
cannam@154 10 documentation and/or other materials provided with the distribution.
cannam@154 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
cannam@154 12 names of specific contributors, may be used to endorse or promote
cannam@154 13 products derived from this software without specific prior written
cannam@154 14 permission.
cannam@154 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
cannam@154 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
cannam@154 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
cannam@154 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
cannam@154 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
cannam@154 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
cannam@154 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
cannam@154 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
cannam@154 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
cannam@154 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
cannam@154 25 POSSIBILITY OF SUCH DAMAGE.
cannam@154 26 ***********************************************************************/
cannam@154 27
cannam@154 28 #ifdef HAVE_CONFIG_H
cannam@154 29 #include "config.h"
cannam@154 30 #endif
cannam@154 31
cannam@154 32 #include "main.h"
cannam@154 33
cannam@154 34 /* Interpolate two vectors */
cannam@154 35 void silk_interpolate(
cannam@154 36 opus_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */
cannam@154 37 const opus_int16 x0[ MAX_LPC_ORDER ], /* I first vector */
cannam@154 38 const opus_int16 x1[ MAX_LPC_ORDER ], /* I second vector */
cannam@154 39 const opus_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
cannam@154 40 const opus_int d /* I number of parameters */
cannam@154 41 )
cannam@154 42 {
cannam@154 43 opus_int i;
cannam@154 44
cannam@154 45 celt_assert( ifact_Q2 >= 0 );
cannam@154 46 celt_assert( ifact_Q2 <= 4 );
cannam@154 47
cannam@154 48 for( i = 0; i < d; i++ ) {
cannam@154 49 xi[ i ] = (opus_int16)silk_ADD_RSHIFT( x0[ i ], silk_SMULBB( x1[ i ] - x0[ i ], ifact_Q2 ), 2 );
cannam@154 50 }
cannam@154 51 }