videoeditorengine/audioeditorengine/resampler/inc/resampler_sinc_conv_filter_three_to_one_int16.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/audioeditorengine/resampler/inc/resampler_sinc_conv_filter_three_to_one_int16.h Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,47 @@
+#ifndef __RESAMPLER_SINC_CONV_FILTER_THREE_TO_ONE_INT16_H__
+#define __RESAMPLER_SINC_CONV_FILTER_THREE_TO_ONE_INT16_H__
+/*
+* 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"
+
+static FORCEINLINE int32
+RESAMPLER_SincConvFilterThreeToOneInt16(const int16 *signalBuf,
+ const int16 *filterPtr,
+ int length)
+{
+ int32 newSample((int32)(*filterPtr++) * signalBuf[0]);
+
+ const int16 *bufferPtr1 = signalBuf - 1;
+ const int16 *bufferPtr2 = signalBuf + 1;
+ for (int l = length - 1; l > 0 ; l--)
+ {
+ // Calculate the filter.
+ // Keep newSample in s1.30 format to reduce rounding errors
+ int16 coeff = *filterPtr++;
+ newSample += (int32)coeff * (*bufferPtr1) + (int32)coeff * (*bufferPtr2);
+ bufferPtr1--;
+ bufferPtr2++;
+ }
+
+ return newSample;
+}
+
+#endif /* __RESAMPLER_SINC_CONV_FILTER_THREE_TO_ONE_INT16_H__ */