/*

* Copyright (c) 2006-2007 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:  ?Description

*

*/

#ifndef IRMP3PLAYERLOCAL_H

#define IRMP3PLAYERLOCAL_H

//sampling rate of MP3 is taken from a look up table

//selection is made based on MPEG version and index bits

//the look up table is made in the form of an array of 4x4 

//and demension are define in terms of constant defined below

const TUint8 KMP3SamplingRateVersionArraySize = 4;

const TUint8 KMP3SamplingRateIndexArraySize = 4;

//bitrate rate of MP3 is taken from a look up table

//selection is made based on MPEG version and Layer and index bits

//the look up table is made in the form of an array of 2x3x16 

//and demension are define in terms of constant defined below

const TUint8 KMP3BitRateMPEGArraySize = 2;

const TUint8 KMP3BitRateLayerArraySize = 3;

const TUint8 KMP3BitRateIndexArraySize = 16;

//channel selection is based on 2 bits and is defined as array of 

//demension 4 and is defined in terms of constant.

const TUint8 KMP3ChannelArraySize = 4;

//sampling rate is given in Hzs.

//KMP3SamplingRate[MPEGVersion][bit index]

const TInt32 KMP3SamplingRate[KMP3SamplingRateVersionArraySize][KMP3SamplingRateIndexArraySize] = //! Sampling rates for MP3

	{		

		{11025,12000,8000,0},    //MPEG 2.5 unofficial   00

		{0, 0, 0, 0},            //reserved              01

		{22050,24000,16000,0},   //MPEG 2                10

		{44100,48000,32000,0}    //MPEG 1                11

	};

//each bit rate is given in Kbps.

// KBitRate[Version][Layer][bitselect] 

const TUint32 KBitRate[KMP3BitRateMPEGArraySize]

					  [KMP3BitRateLayerArraySize]

					  [KMP3BitRateIndexArraySize] = //! Bit rates for Mp3

	{

		{	// MPEG 1

			{0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0},	// Layer1

			{0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,0},	// Layer2

			{0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,0}	// Layer3

		},

		{	// MPEG 2, 2.5		

			{0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,0},	// Layer1

			{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0},			// Layer2

			{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,0}			// Layer3

		}

	};

//enumerated sampling frequency values 

//for mp3 player

enum TIRMp3SamplingFreq

	{

	EMp3SamplingFreq8000 = 8000,

	EMp3SamplingFreq11025 = 11025,

	EMp3SamplingFreq12000 = 12000,

	EMp3SamplingFreq16000 = 16000,

	EMp3SamplingFreq22050 = 22050,

	EMp3SamplingFreq24000 = 24000,

	EMp3SamplingFreq32000 = 32000,

	EMp3SamplingFreq44100 = 44100,

	EMp3SamplingFreq48000 = 48000,	

	};	

//channels 1 for stereo, and 0 for mono

// bits 6,7:

// 00 - Stereo

// 01 - Joint stereo (Stereo)

// 10 - Dual channel (Stereo)

// 11 - Single channel (Mono)

const TUint32 KChannelInfo[KMP3ChannelArraySize] =

	{1,1,0,0};

const TInt KMp3FrameHeaderSize = 5;

//zero indicates that channel is mono

const TInt KMp3ChannelMono = 0;

#endif//IRMP3PLAYERLOCAL_H