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- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
- #include "define.h"
- #include "SigProc_FIX.h"
- void silk_NLSF_VQ_weights_laroia(
- opus_int16 *pNLSFW_Q_OUT,
- const opus_int16 *pNLSF_Q15,
- const opus_int D
- )
- {
- opus_int k;
- opus_int32 tmp1_int, tmp2_int;
- silk_assert( D > 0 );
- silk_assert( ( D & 1 ) == 0 );
-
- tmp1_int = silk_max_int( pNLSF_Q15[ 0 ], 1 );
- tmp1_int = silk_DIV32_16( (opus_int32)1 << ( 15 + NLSF_W_Q ), tmp1_int );
- tmp2_int = silk_max_int( pNLSF_Q15[ 1 ] - pNLSF_Q15[ 0 ], 1 );
- tmp2_int = silk_DIV32_16( (opus_int32)1 << ( 15 + NLSF_W_Q ), tmp2_int );
- pNLSFW_Q_OUT[ 0 ] = (opus_int16)silk_min_int( tmp1_int + tmp2_int, silk_int16_MAX );
- silk_assert( pNLSFW_Q_OUT[ 0 ] > 0 );
-
- for( k = 1; k < D - 1; k += 2 ) {
- tmp1_int = silk_max_int( pNLSF_Q15[ k + 1 ] - pNLSF_Q15[ k ], 1 );
- tmp1_int = silk_DIV32_16( (opus_int32)1 << ( 15 + NLSF_W_Q ), tmp1_int );
- pNLSFW_Q_OUT[ k ] = (opus_int16)silk_min_int( tmp1_int + tmp2_int, silk_int16_MAX );
- silk_assert( pNLSFW_Q_OUT[ k ] > 0 );
- tmp2_int = silk_max_int( pNLSF_Q15[ k + 2 ] - pNLSF_Q15[ k + 1 ], 1 );
- tmp2_int = silk_DIV32_16( (opus_int32)1 << ( 15 + NLSF_W_Q ), tmp2_int );
- pNLSFW_Q_OUT[ k + 1 ] = (opus_int16)silk_min_int( tmp1_int + tmp2_int, silk_int16_MAX );
- silk_assert( pNLSFW_Q_OUT[ k + 1 ] > 0 );
- }
-
- tmp1_int = silk_max_int( ( 1 << 15 ) - pNLSF_Q15[ D - 1 ], 1 );
- tmp1_int = silk_DIV32_16( (opus_int32)1 << ( 15 + NLSF_W_Q ), tmp1_int );
- pNLSFW_Q_OUT[ D - 1 ] = (opus_int16)silk_min_int( tmp1_int + tmp2_int, silk_int16_MAX );
- silk_assert( pNLSFW_Q_OUT[ D - 1 ] > 0 );
- }
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