1 /*

     2 * Copyright (c) 2006 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:    

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 #ifndef AMRPAYLOADHEADER_H

    22 #define AMRPAYLOADHEADER_H

    23 

    24 #include <e32base.h>

    25 #include "amrpayloadformatter.h"

    26 

    27 

    28 // FORWARD DECLARATIONS

    29 class TStreamEncoder;

    30 class TStreamDecoder;

    31 

    32 // MACROS

    33 

    34 

    35 // CLASS DECLARATION

    36 

    37 /**

    38 * The Amr payload header in bandwidth efficient mode.

    39 *

    40 * @lib Mccamrplformat.dll

    41 * @since Series 60 3.1

    42 */

    43 class CAmrPayloadHeader : public CBase

    44     {

    45 

    46 public:  // Constructors and destructor

    47         

    48     public:  // Constructors and destructor

    49 

    50     /**

    51     * Two-phased constructor.

    52     */

    53     static CAmrPayloadHeader* NewL();

    54         

    55     /**

    56     * Destructor.

    57     */

    58     ~CAmrPayloadHeader();

    59 

    60 

    61 public: // New functions

    62 

    63     /**

    64     * Encode the payload header fields into a given buffer at the given

    65     * position. Values to encode are obtained from the corresponding 

    66     * header fields. Byte and bit positions are updated after encoding 

    67     * is done.

    68     * @since    Series 60 3.1

    69     * @param    aBuffer - [output] Buffer to store encoded data.

    70     * @param    aByteIndex - [input] Starting byte index ( starts from

    71     *           zero ).

    72     *           [output] Byte index updated after encoding.

    73     * @param    aBitIndex - [input] Starting bit index 

    74     *                        ( starts from zero ).

    75     *           [output] Bit index updated after encoding.

    76     */

    77     virtual void Encode( TUint8* aBuffer, TInt& aByteIndex,

    78         TInt& aBitIndex );

    79 

    80     /**

    81     * Decode the payload header from a given buffer at the given position.

    82     * Decoded values are returned in the corresponding header fields.

    83     * Byte and bit positions are updated after decoding is done.

    84     * @since    Series 60 3.1

    85     * @param    aBuffer - [input] Buffer to decode data from.

    86     * @param    aByteIndex - [input] Starting byte index ( starts from

    87     *           zero ).

    88     *           [output] Byte index updated after decoding.

    89     * @param    aBitIndex - [input] Starting bit index 

    90     *                         ( starts from zero ).

    91     *           [output] Bit index updated after decoding.

    92     */

    93     virtual void Decode( const TUint8* aBuffer, TInt& aByteIndex, 

    94             TInt& aBitIndex );

    95             

    96     

    97 protected: // Functions

    98 

    99     /**

   100     * Constructor.

   101     */

   102     CAmrPayloadHeader();

   103 

   104 public:     // Data. Payload header fields

   105 

   106     // Codec mode request ( CMR, 4 bits )

   107     TAmrModeRequest iCmr;  

   108 

   109     };

   110 

   111 #endif      // AMRPAYLOADHEADER_H