1 /*

     2 * Copyright (c) 2007 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 CMCEDTMFCODEC_H

    22 #define CMCEDTMFCODEC_H

    23 

    24 // INCLUDES

    25 #include <mceaudiocodec.h>

    26 #include <mcedefs.h>

    27 

    28 // CONSTANTS

    29 

    30 // Dtmf Default Payload Type

    31 const TUint8 KMceDefaultDtmfPayloadType = 98; 

    32 

    33 const TUint KMceDtmfDefaultPtime = 50;

    34 const TUint KMceDtmfSamplingFreq = 8000;

    35 

    36 // Allowed events can be set through allowed bitrates

    37 const TUint KMceAllowedDtmfEvents0to15 = 0xFFFF;

    38 

    39 // DATA TYPES

    40 enum TDtmfCodecMode

    41     {

    42     EMceOutbound = 6,

    43     EMceInbound

    44     };

    45 

    46 // CLASS DECLARATION

    47 

    48 /**

    49 * Class for the DTMF codec information.

    50 *

    51 * It checks the validity of inserted values for DTMF.

    52 * For DTMF codec only mode setting (inbound / outbound) is valid.

    53 * @lib mceclient.lib

    54 */

    55 class CMceDtmfCodec : public CMceAudioCodec

    56     {

    57 	public:  // Constructors and destructor

    58 	    

    59 	    /**

    60 	    * Destructor.

    61 	    */

    62 	    IMPORT_C ~CMceDtmfCodec();

    63 	        

    64 	public: // From base class

    65 

    66 	    /**

    67 	    * Enable / Disable Voice Activity Detection.

    68 	    * @param aEnableVAD, Boolean indicating whether to enable Voice Activity Detection

    69 	    * @return KErrNotSupported if codec doesn't support VAD; otherwise KErrNone.

    70 	    */

    71 	    IMPORT_C TInt EnableVAD(TBool aEnableVAD);

    72 

    73 	    /**

    74 	    * Sets bitrate used with codec for encoding.

    75 	    * @param aBitrate, bitrate value for encoding

    76 	    * @return KErrNotSupported if codec doesn't support bitrate value issued; otherwise KErrNone.

    77 	    */

    78 	    IMPORT_C TInt SetBitrate(TUint aBitrate);

    79 	    

    80 	    /**

    81 	    * Sets bitrates allowed with codec.

    82 	    * @param aBitrates, allowed bitrate values 

    83 	    * @return KErrNotSupported if codec doesn't support bitrate value issued; otherwise KErrNone.

    84 	    */

    85 	    IMPORT_C TInt SetAllowedBitrates(TUint aBitrates);

    86 	        

    87 	    /**

    88 	    * Sets the sampling frequency.

    89 	    * @param aSamplingFreq, Sampling frequency to be used

    90 	    * @return KErrNotSupported if codec doesn't support sampling frequency issued; otherwise KErrNone.

    91 	    */

    92 	    IMPORT_C TInt SetSamplingFreq(TUint aSamplingFreq);

    93 

    94 	    /**

    95 	    * Sets the packetization rate. 

    96 	    * @param aPTime, Packetization rate, must be multiple of audio frame size.

    97 	    * @return KErrNotSupported if codec doesn't support packetrate value issued; otherwise KErrNone.

    98 	    */

    99 	    IMPORT_C TInt SetPTime(TUint aPTime);

   100 	    

   101 	    /**

   102 	    * Sets the maximum packetization rate.

   103 	    * @param aMaxPTime, maximum allowed packetization rate, must be multiple of audio frame size.

   104 	    * @return KErrNotSupported if codec doesn't support packetrate value issued; otherwise KErrNone.

   105 	    */

   106 	    IMPORT_C TInt SetMaxPTime(TUint aMaxPTime);

   107 

   108 	    /**

   109 	    * Sets the payload type identifier.

   110 	    * @param aPayloadType payload type identifier.

   111 	    * @return One of the standard system-wide error codes.

   112 	    */

   113 	    IMPORT_C TInt SetPayloadType(TUint8 aPayloadType);

   114 

   115 	    /**

   116 	    * Sets the codec mode.

   117 	    * @param aCodecMode	Codec mode ( inbound / outbound )

   118 	    * @return KErrNotSupported if codec doesnt' support codec mode value issued; otherwise KErrNone.

   119 	    */

   120 	    IMPORT_C TInt SetCodecMode(TUint aCodecMode);

   121 	    

   122 	    /**

   123 	    * Clones codec, ownership is transferred.

   124 	    * @return cloned codec

   125 	    */

   126 	    IMPORT_C CMceAudioCodec* CloneL() const;

   127 

   128 	public: 

   129 

   130 	    /**

   131 	    * Two-phased constructor.

   132 	    * @param aSdpName sdp name

   133 	    */

   134 	    static CMceDtmfCodec* NewL( TBuf8<KMceMaxSdpNameLength> aSdpName);

   135 

   136 	    /**

   137 	    * Two-phased constructor.

   138 	    * @param aSdpName sdp name

   139 	    */

   140 	    static CMceDtmfCodec* NewLC(TBuf8<KMceMaxSdpNameLength> aSdpName);

   141 

   142 	    	    

   143 	private:

   144 

   145 	    /**

   146 	    * C++ default constructor.

   147 	    */

   148 	    CMceDtmfCodec();

   149 

   150 	    /**

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

   152 	    */

   153 	    void ConstructL( TBuf8<KMceMaxSdpNameLength> aSdpName); 

   154 

   155 	    /**

   156 	    * Sets the sdp name.

   157 	    * @param aSdpName the sdp name

   158 	    */

   159 	    void SetSdpNameL( const TDesC8& aSdpName );

   160 

   161 		//for testing

   162 

   163 	    MCE_UNIT_TEST_DEFS	    

   164     };

   165 

   166 

   167 #endif      

   168 

   169 // End of File