/*

* Copyright (c) 2008 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:  Mcc Internal definitions

*

*/

#ifndef INTERNALDEF_H

#define INTERNALDEF_H

// CONSTANTS

// When the remote end sends us SID/CN frames, then we can update the SID/CN

// parameters programmatically. Otherwise, we should not try to "emulate"

// SID/CN frames as this can lead to degradation of audio quality. Instead,

// we will send NULL/NO_DATA into the decoder.

// AMR-NB SID FT value is 8 and is located in the upper 4 bits

// See 3GPP TS 26.101

const TUint8 KAmrSidMode = 8;

// AMR-NB mode mask

const TUint8 KAmrModeMask = 0x78;

// AMR-NB SID Update frame interval

const TInt KAmrNbSidUpdateInterval = 8;

// Minimum required data length for DTX decision

const TInt KMinDataLenForDtx = 1;

// AMR NO_DATA frame needs one byte

// See 3GPP TS 26.101 and RFC 2367

//  ________________

// |0|1|1|1|1|1|0|0|

// |P|  FT   |Q|P|P|

//

//  P = PADDING

//  FT = 15 = NO_DATA

//  Q = QUALITY

const TUint8 KAmrNoDataFrame = 0x7C;

// Length of the header and AMR NO_DATA frames

const TInt KNoDataLength = 1;

// AMR mode solving needs 3 bit shift

const TInt KModeShiftBits = 3;

// VoIP codec header bytes can be either audio, comfort noise or unvoiced

// non-sid (null/no data) frame. Unvoiced non-sid frame is detected when

// the header byte does not indicate audio or comfort noise.

//const TUint8 KVoIPAudioFrame = 1;

const TUint8 KVoIPCNFrame = 2;

const TUint KJBAdaptUpdateIval = 250;

const TUint KJBMillisecondsToMicroseconds = 1000;

const TUint KJBEmptyBufferDelay = 2;

const TInt  KDefaultSampleRateInkHz = 8;

const TInt  KLowBufferLimit = 2;

const TInt  KOverflowAlarmLimit = 20;

// Codec frame sizes

const TInt  KAMRNBFrameSize = 32;

const TInt  KILBCFrameSize  = 52;

const TInt  KG729FrameSize  = 24;       // 10 octets + 2 for header

// Max possible sequence number of RTP packet with standard RTP header.

const TUint KMaxSeqNumber   = 0xFFFF;   // 16-bit value

// Codec frame times

const TInt  KAMRNBFrameTime = 20;

// VoIP codecs have a two byte header

const TInt  KVoIPHeaderLength = 2;

#endif //INTERNALDEF_H

// End of file