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#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "main_FLP.h"

#include "tuning_parameters.h"

void silk_find_LTP_FLP(

    silk_float                      XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O    Weight for LTP quantization         */

    silk_float                      xX[ MAX_NB_SUBFR * LTP_ORDER ],     /* O    Weight for LTP quantization                 */

    const silk_float                r_ptr[],                            /* I    LPC residual                                */

    const opus_int                  lag[ MAX_NB_SUBFR ],                /* I    LTP lags                                    */

    const opus_int                  subfr_length,                       /* I    Subframe length                             */

    const opus_int                  nb_subfr,                           /* I    number of subframes                         */

    int                             arch

)

{

    opus_int   k;

    silk_float *xX_ptr, *XX_ptr;

    const silk_float *lag_ptr;

    silk_float xx, temp;

    xX_ptr = xX;

    XX_ptr = XX;

    for( k = 0; k < nb_subfr; k++ ) {

        lag_ptr = r_ptr - ( lag[ k ] + LTP_ORDER / 2 );

        silk_corrMatrix_FLP( lag_ptr, subfr_length, LTP_ORDER, XX_ptr, arch );

        silk_corrVector_FLP( lag_ptr, r_ptr, subfr_length, LTP_ORDER, xX_ptr, arch );

        xx = ( silk_float )silk_energy_FLP( r_ptr, subfr_length + LTP_ORDER );

        temp = 1.0f / silk_max( xx, LTP_CORR_INV_MAX * 0.5f * ( XX_ptr[ 0 ] + XX_ptr[ 24 ] ) + 1.0f );

        silk_scale_vector_FLP( XX_ptr, temp, LTP_ORDER * LTP_ORDER );

        silk_scale_vector_FLP( xX_ptr, temp, LTP_ORDER );

        r_ptr  += subfr_length;

        XX_ptr += LTP_ORDER * LTP_ORDER;

        xX_ptr += LTP_ORDER;

    }

}