diff -r 000000000000 -r 951a5db380a0 videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_one_to_two_int16.inl --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_one_to_two_int16.inl Fri Jan 29 14:08:33 2010 +0200 @@ -0,0 +1,57 @@ +#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__ */