--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/EAacPlusUtil.h	Wed Sep 01 12:23:00 2010 +0100
@@ -0,0 +1,167 @@
+/*
+* Copyright (c) 2007 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:  Header file for EAacPlusUtil.cpp
+*
+*/
+
+
+#ifndef 	EAACPLUSUTIL_H
+#define 	EAACPLUSUTIL_H
+
+// INCLUDES
+#include <e32base.h>
+
+// CLASS DECLARATION
+class EAacpAudioFrameInfo;
+
+/**
+*  This class implements utility functions to extract AAC frame
+*  information.
+*
+*  @lib MmfEAacPlusUtil.lib
+*  @since 3.2
+*/
+class CEAacPlusUtil : public CBase
+	{
+	public:
+        // CONSTANTS
+        enum TEAacPlusFormatType
+	        {
+		    EAacPlusFormatRaw=0,
+		    EAacPlusFormatAdif=1,
+		    EAacPlusFormatAdts=2
+        	};
+        /**
+        *  EAAC+ frame info struct.
+        *
+        *  @lib MmfEAacPlusUtil.lib
+        *  @since 3.2
+        */
+        class TEAacPlusFrameInfo
+            {
+        public:
+	        TInt    	iOutFrameSize;			// Size of PCM Samples generated by decoder
+            TInt    	iNoOfSamples;			// Number of PCM Samples generated by decoder per frame
+            TInt    	iSamplingFrequency;		// Sampling freq of AAC Code decoder
+            TInt		iNoOfChannels;			// No of output channel 1=Mono; 2=Stereo
+        	TInt		iObjectType;			// MPEG Audio Object Type 2=AAC-LC; 4=AAC-LTP
+        	TInt		iOutSamplingFrequency;  // Sampling Frequence for the output samples
+        	TInt		iDownSampledMode;    	// 0=Normal Mode; 1=Down Sampled mode
+        	TInt		iSbr;	                // 0=SBR not present; 1=SBR present
+        	TInt		iPs;	                // 0=PS not present; 1=PS present
+            };
+
+        class TEAacPlusFrameLenConfig
+            {
+        public:
+			TEAacPlusFormatType iFormatType;	// Container type.
+            TInt    	iSamplingFrequency;		// Sampling freq of AAC core decoder
+        	TInt		iObjectType;			// MPEG Audio Object Type 2=AAC-LC; 4=AAC-LTP
+            };
+
+
+    public:  // Constructors and destructor
+
+        /**
+        * Two-phased constructor.
+        */
+        IMPORT_C static CEAacPlusUtil* NewL();
+
+        /**
+        * Destructor.
+        */
+        IMPORT_C virtual ~CEAacPlusUtil();
+
+    public: // New functions
+
+		/**
+        * Used to get the format type.
+        * @since 3.2
+        * @param	aBuf                 buffer of AAC data from start of aac content
+        * @param	aBufLen              length of aBuf
+        * @param	TEAacPlusFormatType  returned format type 0=raw; 1=ADIF; 2=ADTS
+        * @return   status
+        */
+        IMPORT_C TInt GetAacFormatType(const TUint8* aBuf, TInt aBufLen, TEAacPlusFormatType& aFormatType);
+
+		/**
+        * Used to get the audio format information for ADIF and ADTS content.
+        * Data should be provided beginning with start of aac content including header.
+        * Enough data should follow the header to determine SBR and PS if needed.
+        * Can be used with mpeg data where aHdrBuf will contain the AudioSpecificConfig. Implicit SBR and PS
+        * will not be determined.
+        * @since 3.2
+        * @param	aHdrBuf buffer with AAC data beginning at start of aac content including ADIF or ADTS header
+        * @param	aHdrLen length of aHdrBuf; header length is returned in this parameter
+        * @param	aFrameInfo returns the format information
+        * @return	status
+        */
+		IMPORT_C TInt GetAacFrameInfo (const TUint8* aHdrBuf, TInt& aHdrLen, TEAacPlusFrameInfo& aFrameInfo);
+		
+		/**
+        * Used to get the audio format information for mpeg aac.
+        * aHdrBuf will contain the AudioSpecificConfig. aDataBuf will contain data at beginning of raw audio frames.
+        * Implicit SBR and PS can be determined.
+        * @since 3.2
+        * @param	aHdrBuf buffer with AudioSpecificConfig data.
+        * @param	aHdrLen length of aHdrBuf
+        * @param	aFrameInfo returns the format information
+        * @param	aDataBuf buffer with raw audio frames
+        * @param	aDataBufLen length of aDataBuf
+        * @return	status
+        */
+		IMPORT_C TInt GetAacFrameInfo (const TUint8* aHdrBuf, TInt& aHdrLen, TEAacPlusFrameInfo& aFrameInfo,
+									TUint8* aDataBuf, TInt aDataBufLen);
+									
+		/**
+        * Used to get the size in bytes of the frame found at the start of aBuf.
+        * @since 3.2
+        * @param	aBuf buffer with AAC data frame
+        * @param	aBufLen length of aBuf
+        * @param	aFrameLen returns the frame size in bytes
+        * @return   status
+        */
+		IMPORT_C TInt GetAacFrameLength(const TUint8* aBuf, TInt aBufLen, TInt& aFrameLen);
+
+		/**
+        * Used to configure the utility with information needed to enable the apis.
+        * This api can be used if GetAacFrameInfo is not used to initialize the utility.
+        * @since 3.2
+        * @param	aFormatType format type
+        * @param	aSamplingFrequency sampling frequency
+        * @return   status
+        */
+		IMPORT_C TInt Config(TEAacPlusFrameLenConfig& aFrameLenConfig);
+
+    private:
+
+        /**
+        * C++ default constructor.
+        */
+        CEAacPlusUtil();
+
+        /**
+        * By default Symbian 2nd phase constructor is private.
+        */
+        void ConstructL();
+
+ 	private:	// Data
+		TEAacPlusFormatType iFormat;
+		EAacpAudioFrameInfo* iGetFrameLenParam;
+		TBool iInitialized;
+	};
+
+#endif      // EAACPLUSUTIL_H
+
+// End of File