--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/videoeditorengine/audioeditorengine/codecs/AAC/inc/ProcAACFrameHandler.h Fri Jan 29 14:08:33 2010 +0200
@@ -0,0 +1,119 @@
+/*
+* 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 __CPROCAACFRAMEHANDLER_H__
+#define __CPROCAACFRAMEHANDLER_H__
+
+#include <e32base.h>
+#include "AudCommon.h"
+#include "ProcConstants.h"
+#include "ProcFrameHandler.h"
+
+#include "AACConstants.h"
+#include "AACAPI.h"
+
+class CProcAACFrameHandler : public CProcFrameHandler
+ {
+
+public:
+
+ // aGain -40(dB) - +20(dB)
+ virtual TBool ManipulateGainL(const HBufC8* aFrameIn, HBufC8*& aFrameOut, TInt8 aGain);
+
+ // From base class
+ virtual TBool GetGainL(const HBufC8* aFrame, RArray<TInt>& aGains, TInt& aMaxGain) const;
+ virtual TBool GetNormalizingMargin(const HBufC8* aFrame, TInt8& aMargin) const;
+
+ virtual ~CProcAACFrameHandler();
+
+ static CProcAACFrameHandler* NewL(TAACFrameHandlerInfo aAACInfo);
+ static CProcAACFrameHandler* NewLC(TAACFrameHandlerInfo aAACInfo);
+
+ /*
+ *
+ * If there are several AAC frames in a row, their start positions and
+ * lengths can be parsed with this function
+ *
+ * @param aFrame input frame to be parsed
+ * @param aFrameStarts starting locations of each frame
+ * @param aFrameLengths frame lengths of each frame
+ */
+
+ TBool ParseFramesL(HBufC8* aFrame, RArray<TInt>& aFrameStarts, RArray<TInt>& aFrameLengths);
+
+ /*
+ * GetEnhancedAACPlusParametersL
+ *
+ * Fills in aacPlus related fields in aProperties
+ *
+ *
+ * @param buf audio data
+ * @param bufLen lenght of "buf"
+ * @param aProperties properties to fill in
+ * @param aAACInfo info for AAC framehandler
+ *
+ */
+
+ static void GetEnhancedAACPlusParametersL(TUint8* buf, TInt bufLen,
+ TAudFileProperties* aProperties,
+ TAACFrameHandlerInfo *aAACInfo);
+
+ /*
+ * CalculateNumberOfHeaderBytes returns the number of ADTS header bytes
+ * and the number of data blocks in a given frame
+ *
+ * @param aFrame input frame
+ * @param aNumBlocks (output) number of data blocks in the frame (usually 1)
+ *
+ * @return the number of ADTS header bytes
+ */
+
+ TInt CalculateNumberOfHeaderBytes(const HBufC8* aFrame, TInt& aNumBlocksInFrame) const;
+
+private:
+
+ // constructL
+ void ConstructL(TAACFrameHandlerInfo aAACInfo);
+
+ // c++ constructor
+ CProcAACFrameHandler();
+
+ // updates the ADTS header if the lenght has
+ // been changed after modifying AACPlus gain
+ TBool UpdateHeaderL(HBufC8* aFrame);
+
+private:
+
+ // AAC decoder handle
+ CAACAudDec* iDecHandle;
+
+ // stores the starting points of raw data blocks if there are
+ // more than one data block in AAC frame
+ RArray<TInt> iFrameStarts;
+
+ // lenghts of the data blocks
+ RArray<TInt> iFrameLengths;
+
+ // info needed for AAC decoder handle creation
+ TAACFrameHandlerInfo iAACInfo;
+
+ };
+
+#endif