--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/audioeditorengine/resampler/inc/resampler_clip.h	Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,149 @@
+#ifndef __RESAMPLER_CLIP_H__
+#define __RESAMPLER_CLIP_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"
+
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @file 
+
+  @ingroup common_dsp
+
+  Helper functions to limit output to different numerical ranges.
+
+  The header file 'resampler_clip.h' contains helper (inline) functions for 
+  limiting the input to a specified numerical range, or more specifically,
+  to a specified number of bits. These functions are especially useful in 
+  fixed point DSP units for limiting the output range.
+*/
+
+/** Clip function for signed 16-bit integer range.
+
+  This function limits its input to the range -32768 <= output <= 32767.
+  The implementation uses the traditional conditionals to check for 
+  overflows..
+*/
+static FORCEINLINE int32 RESAMPLER_Clip16(int32 input)
+{
+    input = input < (-32768) ? (-32768) : input;
+    input = input > 32767 ?  32767 : input;
+    return input;
+}
+
+/** Shift-and-Clip function for signed 16-bit integer range.
+
+  This function limits its input to the range -32768 <= output <= 32767
+  after first shifting the input to the right by the given number of bits.
+*/
+static FORCEINLINE int32 RESAMPLER_RightShiftAndClip16(int32 input, int rightShift)
+{
+    input = input >> rightShift;
+    return RESAMPLER_Clip16(input);
+}
+
+/** Shift-round-and-clip function for signed 16-bit integer range.
+
+  This function limits its input to the range -32768 <= output <= 32767
+  after first shifting the input to the right by the given number of bits
+  with rounding.
+*/
+static FORCEINLINE int32 RESAMPLER_RightShiftRoundAndClip16(int32 input, int rightShift)
+{
+    if (rightShift > 0)
+    {
+        input += (int32)1 << (rightShift - 1);
+    }
+    input = input >> rightShift;
+    return RESAMPLER_Clip16(input);
+}
+
+/** Saturated 16-bit absolute value.
+
+  This function calculates a saturated 16-bit output value from a 16-bit 
+  input RESAMPLER_AbsAndClip16(0x8000) => 0x7FFF.
+*/
+static FORCEINLINE int16 RESAMPLER_AbsSaturate16(int16 input)
+{
+    return (int16)RESAMPLER_Clip16(labs((long)input));
+}
+
+/** Saturated addition of two 16-bit values.
+*/
+static FORCEINLINE int16 RESAMPLER_AddSaturate16(int16 input1, int16 input2)
+{
+    return (int16)RESAMPLER_Clip16((int32)input1 + input2);
+}
+
+
+/** Saturated subtraction of two 16-bit values.
+*/
+static FORCEINLINE int16 RESAMPLER_SubSaturate16(int16 input1, int16 input2)
+{
+    return (int16)RESAMPLER_Clip16((int32)input1 - input2);
+}
+
+/** Saturated addition of two 32-bit values.
+*/
+static FORCEINLINE int32 RESAMPLER_AddSaturate32(int32 input1, int32 input2)
+{
+    /* int40 is the shortest "long long" available on all 
+     * the current platforms 
+     */
+    int40 res = input1;
+    res += input2;
+    if (res > (int40)(2147483647L))
+    {
+        res = (int40)(2147483647L);
+    }
+    if (res < (int40)(-2147483647L - 1))
+    {
+        res = (int40)(-2147483647L - 1);
+    }
+    return (int32)res;
+}
+
+/** Saturated subtraction of two 32-bit values.
+*/
+static FORCEINLINE int32 RESAMPLER_SubSaturate32(int32 input1, int32 input2)
+{
+    int40 res = input1;
+    res -= input2;
+    if (res > (int40)(2147483647L))
+    {
+        res = (int40)(2147483647L);
+    }
+    if (res < (int40)(-2147483647L - 1))
+    {
+        res = (int40)(-2147483647L - 1);
+    }
+    return (int32)res;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* __RESAMPLER_CLIP_H__ */