48 lines
2.7 KiB
C
48 lines
2.7 KiB
C
/***********************************************************************
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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, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions 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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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#include "SKP_Silk_main.h"
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/* Interpolate two vectors */
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void SKP_Silk_interpolate(
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SKP_int xi[ MAX_LPC_ORDER ], /* O interpolated vector */
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const SKP_int x0[ MAX_LPC_ORDER ], /* I first vector */
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const SKP_int x1[ MAX_LPC_ORDER ], /* I second vector */
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const SKP_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
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const SKP_int d /* I number of parameters */
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)
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{
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SKP_int i;
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SKP_assert( ifact_Q2 >= 0 );
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SKP_assert( ifact_Q2 <= ( 1 << 2 ) );
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for( i = 0; i < d; i++ ) {
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xi[ i ] = ( SKP_int )( ( SKP_int32 )x0[ i ] + SKP_RSHIFT( SKP_MUL( ( SKP_int32 )x1[ i ] - ( SKP_int32 )x0[ i ], ifact_Q2 ), 2 ) );
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}
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}
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