1 /*

     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Class definition for the AMR utility functions.

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef CAMRAUDIOCONTROLLERUTILITY_H

    21 #define CAMRAUDIOCONTROLLERUTILITY_H

    22 

    23 //  INCLUDES

    24 #include "AdvancedAudioUtility.h"

    25 

    26 // FORWARD DECLARATIONS

    27 class CMMFDataBuffer;

    28 

    29 // CLASS DEFINITIONS

    30 

    31 /**

    32 *  This class provides AMR utility functions.

    33 *

    34 *  @lib CAMRAudioControllerUtility.lib

    35 *  @since 3.0

    36 */

    37 class CAMRAudioControllerUtility : public CAdvancedAudioUtility

    38     {

    39 	public:  // Constructors and destructor

    40 

    41         /**

    42         * Two-phased constructor.

    43         */

    44         IMPORT_C static CAMRAudioControllerUtility* NewL();

    45 

    46         /**

    47         * Destructor.

    48         */

    49         IMPORT_C virtual ~CAMRAudioControllerUtility();

    50 

    51     public: // Functions from base classes

    52 

    53 		/**

    54 		* From CAdvancedAudioUtility

    55         * Scans header information

    56 		* @param aDataBuf

    57 		* @return void

    58 		*/

    59 		void ScanHeaderL(CMMFDataBuffer* aDataBuf);

    60 

    61 		/**

    62         * From CAdvancedAudioUtility

    63 		* Returns the byte position of the first frame.

    64 		* @param aBuf Pointer to the data

    65 		* @param aBufLen Length of the data

    66 		* @return byte position of the first frame

    67 		*/

    68 		TInt SeekSync( CMMFDataBuffer* aBuf, TInt aBufLen );

    69 

    70 		/**

    71         * From CAdvancedAudioUtility

    72 		* Returns frame info.

    73 		* @param aBuf Pointer to the data

    74 		* @param aBufLen Length of the data

    75 		* @param aInfo Contains the frame info on return

    76 		* @return frame length

    77 		*/

    78 		TInt FrameInfo( const TUint8* aBuf, TInt aBufLen, TAudioFrameInfo& aInfo );

    79 

    80 		/**

    81         * From CAdvancedAudioUtility

    82 		* Returns frame header size.

    83 		* @param none

    84 		* @return frame header size

    85 		*/

    86 		TInt FrameHeaderSize();

    87 

    88 	private:

    89 

    90         /**

    91         * C++ default constructor.

    92         */

    93 		CAMRAudioControllerUtility();

    94 

    95         /**

    96         * By default Symbian 2nd phase constructor is private.

    97         */

    98 		void ConstructL();

    99 

   100 	private:	// Data

   101 

   102 	    TInt iFrameDataOffset;

   103     };

   104 

   105 #endif 		// CAMRAUDIOCONTROLLERUTILITY_H

   106 

   107 // End of File