--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmlibs/mmfw/Codecs/Src/MMFCodecCommon/MMFAudioALawToPcm16Codec.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,70 @@
+// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "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:
+//
+// Description:
+//
+
+#include "MMFAudioALawToS16PcmCodec.h"
+
+/***
+*
+* Convert
+*
+*/
+EXPORT_C void TMMFAudioALawToS16PcmCodec::Convert(TUint8* aSrc, TUint8* aDst, TInt aSamples)
+	{
+	ASSERT(aSrc);
+	ASSERT(aDst);
+	
+	TInt pcm;
+	while (aSamples--)
+		{
+		pcm = AlawSampleToPcm(*aSrc++);
+		*aDst++ = STATIC_CAST( TUint8, pcm&KAndMask8bit);
+		*aDst++ = STATIC_CAST( TUint8, pcm>>8);
+		}
+	
+	}
+
+/***
+*
+* AlawSampleToPcm
+* @param aLaw
+* @return TInt
+*
+*/
+TInt TMMFAudioALawToS16PcmCodec::AlawSampleToPcm(TUint8 aAlaw)
+	{
+    TInt sign, exponent, mantissa, sample;
+	
+    aAlaw ^= 0x55;	//will leave this as is, more readable
+    sign = ( aAlaw & KMaskSign8bit );
+    aAlaw &= 0x7f;			/* get magnitude */
+    if (aAlaw >= 16)
+		{
+		exponent = (aAlaw >> 4 ) & 0x07;
+		mantissa = aAlaw & 0x0F;
+		sample = KExpLut[exponent] + ( mantissa << ( exponent + 3 ) );
+		}
+    else
+		sample = (aAlaw << 4) + 8;
+	
+    if ( sign == 0 )
+		sample = -sample;
+	
+    return sample;
+	}
+
+const TInt TMMFAudioALawToS16PcmCodec::KExpLut[] = 
+	{
+	0, 264, 528, 1056, 2112, 4224, 8448, 16896
+	};