/*

* Copyright (c) 2002 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:  

*       For checking the validity of Smart messaging ringing tone and for 

*       ripping the ringing tone title from binary data. 

*

*/

#define _DEBUG_

#ifndef __RINGTONECONVERT_H

#define __RINGTONECONVERT_H

//  INCLUDES

#include <e32base.h>

#include "NsmRingTone.h"

// FORWARD DECLARATIONS

NONSHARABLE_STRUCT( TInstruction )

    {

    TInt iValue;

    TInt iDuration;

    TInt iDurspecifier;

    TInt iScale;

    TInt iStyle;

    };

// CONSTANTS

NONSHARABLE_STRUCT( TCompData )

    {

	TInt iTempo;

	CArrayFix<TInstruction>* iSongData;

	TInt iSongLength;

	TBuf<KrtSongTitleTextLength> iSongTitle;

    };

//  CLASS DECLARATION 

NONSHARABLE_CLASS( CRingBCNSMConverter ) : public CBase

    {

    public:     // New functions

        /**

        * Creates an instance of CRingBCNSMConverter and returns it.

        */

	    static CRingBCNSMConverter* NewL();

    protected:

        /**

        * Second-phase constructor.

        */

        void ConstructL();

        /**

        * Default C++ constructor.

        */

	    CRingBCNSMConverter();

    public:

        /**

        * Destructor.

        */

	    ~CRingBCNSMConverter();

    public:     // New methods

        /**

        * Converts a Nokia Smart Messaging stream into TCompData.

        *

        * Smart Messaging:	<ringing-tone-programming-language>::=<command>+

        *					<command>::=

        *							<command-length><command-part>+ |

        *							<command-end>

        *					<command-length>::='binary[00000001..11111111], indicates

        *							how many command parts there are in the command.'

        *					<command-end>::='binary[00000000]. This indicates the end 

        *							of the ringing tone programming language.'

        * @param aFileData      The NSM stream.

        * @return               The song.

        */

	    TCompData* ConvertNsmToCompDataL( const TDesC8& aFileData );

        /**

        * Sets the title of the song.

        *

        * @param aFileName      The new title of the song.

        * @return               Error code

        */

	    void SetTitle( const TDesC& aFileName );

	    /**

        * Returns a pointer to the title of the ring tone.

        *

	    * Usage: 

	    *	1) Create converter(converter = CRingBCNSMConverter::NewL())

	    *	2) Call TitleL function to get title pointer(title = converter->TitleL(aFileData))

	    *	3) Use title pointer however necessary

	    *

        * @param aFileData          A pointer to the raw file data.

        * @return                   The title as a HBufC. The ownership is

        *                           transferred and it is left in cleanup stack.

	    *

        **/

	    HBufC* TitleLC(TPtr8& aFileData);

	    /**

        * Check if a NSM stream is a valid ringtone.

        *

	    * Usage: 

	    *	1) Create converter(converter = CRingBCNSMConverter::NewL())

	    *	2) Call function(booleanValue = converter->IsRingToneMimeTypeL(aFileData))

        *

        * @param aFileData		    A pointer to the raw file data.

        * @return                   ETrue if the tune is a ring tone, EFalse otherwise.

	    *

	    **/

        TBool IsRingToneMimeTypeL(TPtr8& aFileData);

    private:

	    struct TNsmRTPatterns

	    {

		    TInt iStart;

		    TInt iEnd;

	    };

        /**

        * Description:		This function processes Nokia Smart Messaging Ringing Tone

        *					<command-part> to generate Composer data.

        *

        * Smart Messaging:	<command-part>::=

        *							<ringing-tone-programming> |

        *							<unicode> |

        *							<cancel-command><cancel-command-specifier> |

        *							<sound><sound-command-specifier>

        *

        *					If necessary, filler bits are aded to ensure that 

        *					<command-part> is always octet-aligned.

        *

        *					The Ringing Tone programming requires that the order of 

        *					the command parts is the following: <ringing-tone-

        *					programming>, [<unicode>,] <sound>.

        */

	    void ProcessNsmRingToneCommandPartL();

        /**

        * Description:		This function processes Nokia Smart Messaging Ringing Tone

        *					<sound-command-specifier> to generate Composer data.

        *

        * Smart Messaging:	<sound-command-specifier>::=

        *							<basic-song-type><basic-song> |

        *							<temporary-song-type><temporary-song> |

        *							<midi-song-type><midi-song> |

        *							<digitized-song-type><digitized-song>

        */

	    void ProcessNsmRingToneSoundSpecL();

        /**

        * Description:		This function processes Nokia Smart Messaging Ringing Tone

        *					<song-title> 

        *

        * Smart Messaging:	<song-title>::=<text-length><text>

        *					<text>::=<default-char>+ |  'Uincode disabled'

        *							 <ISO-10646-char>+  'Uincode enabled'

        *					<text-length>::='binary[0000..1111]; Indicating how many

        *							characters are used for the following text.'	

        */

	    void ProcessNsmRingToneSongTitleL();

        /**

        * Description:		This function processes Nokia Smart Messaging Ringing Tone

        *					<temporary-song> to generate Composer data.

        *

        * Smart Messaging:	<temporary-song>::=<song-sequence-length><song-sequence>

        *					<song-sequence-length>::='binary[00000000..11111111]; 

        *							Indicates how many song patterns follow

        *					<song-sequence>::=<song-pattern>+

        *					<song-pattern>::=

        *							<pattern-header> |

        *							<pattern-header><pattern-instruction>+

        *					<pattern-header>::=

        *    						<pattern-header-id><pattern-id><loop-value><pattern-specifier>

        *					<loop-value>::='binary[0000..1111]; Indicates how many

        *							times the pattern should be repeated. Value zero 

        *							means no repeat. Value binary 1111 means infinite.

        *					<pattern-spacifier>::=

        *							<already-defined-pattern> | <length-of-new-pattern>

        *					<already-defined-pattern::='binary[00000000]; Indicates that

        *							an already defined pattern is used again.'

        *					<length-of-the-new-pattern>::='binary[00000001..11111111];

        *							Indicates how many pattern instructions there are

        *							in the song pattern. 

        */

	    void ProcessNsmRingToneSongL();

        /**

        * Description:		This function processes Nokia Smart Messaging Ringing Tone

        *					<pattern-instruction> to generate Composer data.

        *

        * Smart Messaging:	<pattern-instruction>::=

        *							<note-instruction> | <scale-instruction> |

        *							<style-instruction> | <tempo-instruction> |

        *							<volume-instruction>

        *					<scale-intruction>::=<scale-instruction-id><scale-value>

        *					<style-intruction>::=<style-instruction-id><style-value>

        *					<tempo-intruction>::=<tempo-instruction-id><tempo-value>

        *					<volume-intruction>::=<volume-instruction-id><volume-value>

        */

	    void ProcessNsmRingTonePatternInstructionL();

        /**

        * Description:		This function forms a composer symbol from the pattern

        *					instructions and places it into the CompData structure.

        *

        * Smart Messaging:	<note-instruction>::=<note-instruction-id><note-value>

        *							<note-duration><note-duration-specifier>

        */

	    void ProcessNsmRingToneNoteInstructionL(TInt aScale, TInt aStyle);

        /**

        * This function extracts the specified number of bits from 

        * the bit stream(returned int will contain both the instruction

        * bits and the data bits).

        *

        * @param aNumBits   The number of bits to get.

        * @return           The value.

        */

	    TInt GetBits(TInt aNumBits);

        /**

        */

	    void ResetForCompData();

    private:        // Data

        /// The data being converted from an NSM stream.

	    TPtrC8 iReceivedNsmRTData;

        /// The flags associated with an NSM stream.

	    TInt iNsmRTFlags;

        /// The current position in the stream.

	    TInt iNsmPosition;

        /// The current bit number in the NSM stream.

	    TInt iNsmPositionBit;

        /// Patterns of NSM data.

	    TFixedArray<TNsmRTPatterns,4> iNsmRTPatterns;

        /// The default scale of a tone.

	    TInt iScale;

        /// The default style of a tone.

	    TInt iStyle;

        /// The song data created. Owns.

	    TCompData iCompData;

        /// The song data received for conversion. Refs.

	    TCompData* iReceivedCompData;

        /// The position in the song data.

	    TInt iCompDataPosition;

        /// If ETrue, the song data cannot be loaded to Composer.

        TBool iReadOnly;

};

#endif