#ifndef __RESAMPLER_SINC_CONV_ONE_TO_TWO_INT16_INL__

#define __RESAMPLER_SINC_CONV_ONE_TO_TWO_INT16_INL__

/*

* Copyright (c) 2010 Ixonos Plc.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - Initial contribution

*

* Contributors:

* Ixonos Plc

*

* Description:

*

*/

#include "resampler_common_defs.h"

#include "resampler_data_types.h"

/* Note! This version assumes the number of filter coefficients is 

 * divisible by four.

 */

static FORCEINLINE int32 

RESAMPLER_SincConvOneToTwoFilterInt16(const int16 *signalBuf, 

                                const int16 *coeffBuf,

                                int length)

{

    int32 newSample = 0;

    const int16 *bufferPtr1 = signalBuf;

    const int16 *bufferPtr2 = signalBuf - 1;

    (void)length;

    // Calculate the filter. 

    // Keep newSample in s1.30 format to reduce rounding errors

    for (int k = length; k>0; k-=4)

    {

        newSample += (int32)(*coeffBuf  ) * (*bufferPtr1++);

        newSample += (int32)(*coeffBuf++) * (*bufferPtr2--);

        newSample += (int32)(*coeffBuf  ) * (*bufferPtr1++);

        newSample += (int32)(*coeffBuf++) * (*bufferPtr2--);

        newSample += (int32)(*coeffBuf  ) * (*bufferPtr1++);

        newSample += (int32)(*coeffBuf++) * (*bufferPtr2--);

        newSample += (int32)(*coeffBuf  ) * (*bufferPtr1++);

        newSample += (int32)(*coeffBuf++) * (*bufferPtr2--);

    }

    return newSample;

}

#endif /* __RESAMPLER_SINC_CONV_ONE_TO_TWO_INT16_INL__ */