--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/audioeditorengine/inc/RateConverter.h	Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,139 @@
+/*
+* 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:  
+*
+*/
+
+
+
+#ifndef __CRateConverter_H__
+#define __CRateConverter_H__
+
+#include <e32base.h>
+
+#include "resampler_rate_conversion_input_driven_int16.h"
+
+class CRateConverter : public CBase
+    {
+
+public:
+    
+    /*
+    * Symbian constructors
+    *
+    */
+    static CRateConverter* NewL(TInt aFromSampleRate, TInt aToSampleRate, TInt aFromChannels, TInt aToChannels);
+                                        
+    static CRateConverter* NewLC(TInt aFromSampleRate, TInt aToSampleRate, TInt aFromChannels, TInt aToChannels);
+
+    /*
+    * Destructor
+    */
+    ~CRateConverter();
+    
+    /*
+    * Initialize the rate converter
+    *
+    * @param aInputBufferSize Max size of the input buffer in number of samples
+    * @return ETrue if successful
+    *
+    */
+    TBool InitL(TInt aInputBufferSize);
+
+    /*
+    * Does rate and channel conversion for given buffer
+    *
+    * @param aInput Pointer to input buffer (16-bit samples)
+    * @param aOutput Pointer to output buffer (16-bit samples)
+    * @param aInputSampleCount Number of samples in the input buffer
+    * @return Number of samples in the output buffer
+    */
+    TInt ConvertBufferL(TInt16* aInput, TInt16* aOutput, TInt aInputSampleCount);  
+    
+    /*
+    * Returns the size of the output buffer
+    *
+    */
+    TInt GetOutputBufferSize() { return iOuputBlockSize; }
+    
+
+protected:
+    
+    // constructL    
+    void ConstructL();
+    
+    // C++ constructor
+    CRateConverter(TInt aFromSampleRate, TInt aToSampleRate, TInt aFromChannels, TInt aToChannels);
+    
+private:
+    
+    /*
+    * Does internal initialization
+    *
+    */
+    TBool DoInitL(TInt aInputBufferSize);
+    
+    /*
+    * Does the actual conversion
+    *
+    */
+    TInt DoConvertL(TInt16** aInput, TInt aInputSampleCount);
+    
+    /*
+    * Returns pointer to the output buffer
+    *
+    */
+    TInt16** GetOutputBuffer() { return iOutBuffer; }
+          
+private:
+
+    // Another converter incase two phase converting is needed
+    CRateConverter* iChild;
+
+    // The actual converter
+    RESAMPLER_RateConversionInputDrivenInt16* iConverter;
+    
+    // Input data for rate converter
+    TInt16** iInBuffer;
+    
+    // Output data from rate converter
+    TInt16** iOutBuffer;
+    
+    // Temp buffer used by converter
+    TInt8* iScratchBuffer;
+
+    // Size of the input buffer
+    TInt iInputBlockSize;
+    
+    // Size of the output buffer
+    TInt iOuputBlockSize;
+    
+    // Number of channels used in converter
+    TInt iChannels;
+
+    // Samplerate to convert from
+    TInt iFromSampleRate;
+    
+    // Samplerate to convert to
+    TInt iToSampleRate;
+    
+    // Number of channels in input
+    TInt iFromChannels;
+    
+    // Number of channels in output
+    TInt iToChannels;
+    };
+
+#endif