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 // INCLUDE FILES

    22 #include "amrtocentry.h"

    23 #include "amrpayloadformatter.h"

    24 #include "streamformatter.h"

    25 

    26 // CONSTANTS

    27 const TUint KFTFieldBits = 4;

    28 const TUint KFrameFollowedBits = 1;

    29 const TUint KQualityIndBits = 1;

    30 

    31 

    32 // ---------------------------------------------------------------------------

    33 // CAmrTocEntry::CAmrTocEntry

    34 // C++ default constructor can NOT contain any code, that

    35 // might leave.

    36 // ---------------------------------------------------------------------------

    37 //

    38 CAmrTocEntry::CAmrTocEntry() : iFrameFollowed( 1 ),

    39     iFrameType( EAmrFrame5_15 ), iFrameQualityInd( 1 ) 

    40     {

    41     DP_AMR_ENCODE( "CAmrTocEntry::CAmrTocEntry" );        

    42     }

    43 

    44 

    45 // ---------------------------------------------------------------------------

    46 // CAmrTocEntry::NewL

    47 // Two-phased constructor.

    48 // ---------------------------------------------------------------------------

    49 //

    50 CAmrTocEntry* CAmrTocEntry::NewL()

    51     {

    52     DP_AMR_ENCODE( "CAmrTocEntry::NewL" );   

    53     CAmrTocEntry* self = new( ELeave ) CAmrTocEntry( );    

    54     return self;

    55     }

    56 

    57 

    58 // Destructor

    59 CAmrTocEntry::~CAmrTocEntry()

    60     {

    61     DP_AMR_ENCODE( "CAmrTocEntry::~CAmrTocEntry" );

    62     }

    63 

    64 

    65 // ---------------------------------------------------------------------------

    66 // CAmrTocEntry::Encode

    67 // Encode the `table of contents' ( TOC ) entry fields into a given buffer.

    68 // ---------------------------------------------------------------------------

    69 //

    70 void CAmrTocEntry::Encode( TUint8* aBuffer,

    71         TInt& aByteIndex, TInt& aBitIndex )

    72     {

    73     DP_AMR_ENCODE( "CAmrTocEntry::Encode" );

    74         

    75     TStreamEncoder encoder;

    76     encoder.Initialize( aBuffer, aByteIndex, aBitIndex );

    77     

    78     // In bandwidth-efficient mode, a TOC entry takes the following format

    79     //   0 1 2 3 4 5

    80     //  +-+-+-+-+-+-+

    81     //  |F|  FT   |Q|

    82     //  +-+-+-+-+-+-+

    83     encoder.Encode( iFrameFollowed, KFrameFollowedBits );

    84     encoder.Encode( iFrameType, KFTFieldBits );

    85     encoder.Encode( iFrameQualityInd, KQualityIndBits );

    86 

    87     // Update Byte and Bit positions

    88     aByteIndex = encoder.ByteIndex( );

    89     aBitIndex = encoder.BitIndex( );

    90     }

    91 

    92 

    93 // ---------------------------------------------------------------------------

    94 // CAmrTocEntry::Decode

    95 // Decode the `table of contents' ( TOC ) entry fields from a given buffer at

    96 // the given position.

    97 // ---------------------------------------------------------------------------

    98 //

    99 void CAmrTocEntry::Decode( const TUint8* aBuffer, 

   100         TInt& aByteIndex, TInt& aBitIndex )

   101     {

   102     DP_AMR_ENCODE( "CAmrTocEntry::Decode" );

   103         

   104     TStreamDecoder decoder;

   105     decoder.Initialize( aBuffer, aByteIndex, aBitIndex );

   106 

   107     // In bandwidth-efficient mode, a TOC entry takes the following format

   108     //   0 1 2 3 4 5

   109     //  +-+-+-+-+-+-+

   110     //  |F|  FT   |Q|

   111     //  +-+-+-+-+-+-+

   112     iFrameFollowed = TUint8( decoder.Decode( KFrameFollowedBits ) );

   113     iFrameType = TAmrFrameType( decoder.Decode( KFTFieldBits ) );

   114     iFrameQualityInd = TUint8( decoder.Decode( KQualityIndBits ) );

   115 

   116     // Update Byte and Bit positions

   117     aByteIndex = decoder.ByteIndex( );

   118     aBitIndex = decoder.BitIndex( );

   119     }