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27 
28 #ifdef HAVE_CONFIG_H
29 #include "config.h"
30 #endif
31 
32 #include "main.h"
33 
34 /* Interpolate two vectors */
silk_interpolate(opus_int16 xi[MAX_LPC_ORDER],const opus_int16 x0[MAX_LPC_ORDER],const opus_int16 x1[MAX_LPC_ORDER],const opus_int ifact_Q2,const opus_int d)35 void silk_interpolate(
36     opus_int16                  xi[ MAX_LPC_ORDER ],            /* O    interpolated vector                         */
37     const opus_int16            x0[ MAX_LPC_ORDER ],            /* I    first vector                                */
38     const opus_int16            x1[ MAX_LPC_ORDER ],            /* I    second vector                               */
39     const opus_int              ifact_Q2,                       /* I    interp. factor, weight on 2nd vector        */
40     const opus_int              d                               /* I    number of parameters                        */
41 )
42 {
43     opus_int i;
44 
45     silk_assert( ifact_Q2 >= 0 );
46     silk_assert( ifact_Q2 <= 4 );
47 
48     for( i = 0; i < d; i++ ) {
49         xi[ i ] = (opus_int16)silk_ADD_RSHIFT( x0[ i ], silk_SMULBB( x1[ i ] - x0[ i ], ifact_Q2 ), 2 );
50     }
51 }
52