xref: /external/chromium_org/third_party/opus/src/silk/float/autocorrelation_FLP.c

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "typedef.h"
#include "SigProc_FLP.h"

/* compute autocorrelation */
void silk_autocorrelation_FLP(
    silk_float          *results,           /* O    result (length correlationCount)                            */
    const silk_float    *inputData,         /* I    input data to correlate                                     */
    opus_int            inputDataSize,      /* I    length of input                                             */
    opus_int            correlationCount    /* I    number of correlation taps to compute                       */
)
{
    opus_int i;

    if( correlationCount > inputDataSize ) {
        correlationCount = inputDataSize;
    }

    for( i = 0; i < correlationCount; i++ ) {
        results[ i ] =  (silk_float)silk_inner_product_FLP( inputData, inputData + i, inputDataSize - i );
    }
}