2013-02-16 09:23:32 +01:00
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/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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2013-12-21 14:40:43 +01:00
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
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2013-02-16 09:23:32 +01:00
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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2013-12-21 14:40:43 +01:00
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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2013-02-16 09:23:32 +01:00
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "main.h"
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/* Interpolate two vectors */
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void silk_interpolate(
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opus_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */
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const opus_int16 x0[ MAX_LPC_ORDER ], /* I first vector */
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const opus_int16 x1[ MAX_LPC_ORDER ], /* I second vector */
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const opus_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
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const opus_int d /* I number of parameters */
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)
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{
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opus_int i;
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silk_assert( ifact_Q2 >= 0 );
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silk_assert( ifact_Q2 <= 4 );
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for( i = 0; i < d; i++ ) {
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xi[ i ] = (opus_int16)silk_ADD_RSHIFT( x0[ i ], silk_SMULBB( x1[ i ] - x0[ i ], ifact_Q2 ), 2 );
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}
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}
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