// Copyright (c) 2003-2009 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:

//

#ifndef __MIDICLIENTUTILITY_H__

#define __MIDICLIENTUTILITY_H__

#include <e32std.h>

#include <e32base.h>

#include <bamdesca.h> 

#include <mmf/common/mmfcontroller.h>

#include <mmf/common/mmfstandardcustomcommands.h>

#include <mmf/common/mmfdrmcustomcommands.h>

#include <mmf/common/mmfmididatacommon.h>

/**

General utility class to hold instrument information.

@publishedAll

@released

*/

class TInstrumentInfo

	{

public:

	/**

	 *Identifier of sound bank to reference.

	 */

	TInt iBankId;

	/**

	 * Specifies whether to reference a custom or standard sound bank.

	 */

	TBool iCustom;

	/**

	 * Identifier of specified instrument.

	 */

	TInt iInstrumentId;

	};

/**

Defines the state of the MIDI client utility with regard to the MIDI resource.

@publishedAll

@released

*/

enum TMidiState

	{

	/**

	 * No MIDI resource is currently open. 

	 * The MIDI engine is not processing midi events.

	 */

	EMidiStateClosedDisengaged,  

	/**

	 * A MIDI resource is open and primed but not playing.

	 * The MIDI engine is not processing midi events.

	 */

	EMidiStateOpenDisengaged,

	/**

	 * A MIDI resource is open and currently playing.

	 * The MIDI engine is currently processing midi events.

	 */

	EMidiStateOpenPlaying,  

	/**

	 * Not able to play full SP-MIDI or DLS content, but attempting best-effort playback.

	 */

	EMidiStatePlaybackIncompatible,

	/**

	 * Due to system resource constraints and SP-MIDI content constraints,

	 * there is no audible MIDI content during playback currently.

	 * The situation may change if resources are freed later.

	 */

	EMidiStatePlaybackSilent,

	/**

	 * No MIDI resource is currently open. 

	 * The MIDI engine is currently processing midi events. 

	 */

	EMidiStateClosedEngaged, 

	/**

	 * A MIDI resource is open and primed but not playing. 

	 * The MIDI engine is currently processing MIDI events. 

	 * The transition to this state is only possible from EMidiStateOpenPlaying state, 

	 * when the 'playback head' reaches the end of media data or the playback

	 * stops due to stop time set.

	 */

	EMidiStateOpenEngaged,

	};

/**

Active object utility class to allow MIDI events to be signalled asynchronously.

@see CMidiClientUtility::NewL().

@publishedAll

@released

*/

class MMidiClientUtilityObserver

	{

public:

    /**

    A state change has occurred in the MIDI client utility.

    @param aOldState 

	       Old state.

    @param aNewState 

	       New state.	 

    @param aTime 

	       The time in microseconds at which playback stopped relative to the start of the MIDI resource.	

    @param aError	

	       Error code.

    */

	virtual void MmcuoStateChanged(TMidiState aOldState,TMidiState aNewState,const TTimeIntervalMicroSeconds& aTime,TInt aError) = 0;

    /**

    The MIDI resource has encountered a tempo change message in the MIDI data stream.

    @param aMicroBeatsPerMinute 

	       New tempo value in micro beats per minute (BPM*1000000).

    */

	virtual void MmcuoTempoChanged(TInt aMicroBeatsPerMinute) = 0;

    /**

    The MIDI resource has encountered a volume change message in the MIDI data stream.

    @param aChannel 

	       Logical channel to which the message applies. 0 <= aChannel < ChannelsSupportedL().

    @param aVolumeInDecibels 

	       New volume setting being used.

    */

	virtual void MmcuoVolumeChanged(TInt aChannel,TReal32 aVolumeInDecibels) = 0;

    /**

    The MIDI resource has encountered a mute message in the MIDI data stream.

    @param aChannel

	       Logical channel to which the message applies. 0 <= aChannel < ChannelsSupportedL().

    @param aMuted 

	       New muting state of the channel - ETrue is muted, EFalse is unmuted.

    */

	virtual void MmcuoMuteChanged(TInt aChannel,TBool aMuted) = 0;

    /**

    Callback in response to a call to CMIDIClientUtility::SetSyncUpdateCallbackIntervalL().

	By default there are no callbacks. Otherwise the callback is called at an interval set by the client. 

    @param aMicroSeconds 

	       Position in microseconds relative to the start of the resource - only set if 

	       the sync update set function was called with the microseconds parameter set.

    @param aMicroBeats 

	       Position in microbeats relative to the start of the resource - only set if

	       the sync update set function was called with the microbeats parameter set and

	       the microseconds parameter set to 0.

    */

	virtual void MmcuoSyncUpdate(const TTimeIntervalMicroSeconds& aMicroSeconds,TInt64 aMicroBeats) = 0;

    /**

    A timed meta data entry has been found in the MIDI data stream, eg a timed song lyric in an SMF file.

    @param aMetaDataEntryId 

	       Index of the meta data entry - if this entry has not been encountere before,

	       it will be added to the list of meta data entries. Previously encountered timed 

		   entries still generate this callback. 

    @param aPosition

	       Position in microseconds relative to the start of the MIDI resource that the MIDI

	       meta data entry was found at.

    */

	virtual void MmcuoMetaDataEntryFound(const TInt aMetaDataEntryId,const TTimeIntervalMicroSeconds& aPosition) = 0;

    /**

    A MIP message has been found in the MIDI data stream.

    @param aMessage 

	       Reference to an array of MIP message entries (logical {channel, MIP} value pairs) 

	       contained in the message.

    */

	virtual void MmcuoMipMessageReceived(const RArray<TMipMessageEntry>& aMessage) = 0;

    /**

    The polyphony of the MIDI engine has changed.

    @param aNewPolyphony 

	       The new polyphony value.

    */

	virtual void MmcuoPolyphonyChanged(TInt aNewPolyphony) = 0;

    /**

    An instrument has been changed on a channel.

    @param aChannel 

	       Channel where the change of instrument occurred. 0 <= aChannel < ChannelsSupportedL().

    @param aBankId 

	       Identifier of the bank that the instrument belongs to, occupying no more than 14 bits. 

	       The bank ID is a concatenation of MIDI bank MSB and LSB values.

    @param aInstrumentId 

	       Identifier of the instrument that has been changed. 0 <= aInstrumentId <= 127.

    */

	virtual void MmcuoInstrumentChanged(TInt aChannel,TInt aBankId,TInt aInstrumentId) = 0;

	};

/**

Utility class to provide a standard client interface to a MIDI controller.

@publishedAll

@released

*/

class CMidiClientUtility : public CBase

	{

	class CBody;

public:

	IMPORT_C static CMidiClientUtility* NewL(MMidiClientUtilityObserver& aObserver,

											 TInt aPriority = EMdaPriorityNormal,

											 TInt aPref = EMdaPriorityPreferenceTimeAndQuality);

	// alternative NewL for selecting shared/separate controller heap(s)

	IMPORT_C static CMidiClientUtility* NewL(MMidiClientUtilityObserver& aObserver,

											 TInt aPriority,

											 TInt aPref,

											 TBool aUseSharedHeap);

	/**	Destructor */

	virtual ~CMidiClientUtility();

	IMPORT_C TMidiState State() const;

	IMPORT_C void OpenFile(const TDesC& aFileName);

	IMPORT_C void OpenFile(const RFile& aFile);

	IMPORT_C void OpenFile(const TMMSource& aSource);

	IMPORT_C void OpenDes(const TDesC8& aDescriptor);

	IMPORT_C void OpenUrl(const TDesC& aUrl,TInt aIapId = KUseDefaultIap,const TDesC8& aMimeType=KNullDesC8);

	IMPORT_C void Close();

	IMPORT_C void Play();

	IMPORT_C void Stop(const TTimeIntervalMicroSeconds& aFadeOutDuration);

	IMPORT_C void PlayNoteL(TInt aChannel,TInt aNote,const TTimeIntervalMicroSeconds& aDuration,TInt aNoteOnVelocity,TInt aNoteOffVelocity);

	IMPORT_C void PlayNoteL(TInt aChannel,TInt aNote,const TTimeIntervalMicroSeconds& aStartTime,const TTimeIntervalMicroSeconds& aDuration,TInt aNoteOnVelocity,TInt aNoteOffVelocity);

	IMPORT_C void StopNotes(TInt aChannel);

	IMPORT_C void NoteOnL(TInt aChannel,TInt aNote,TInt aVelocity);

	IMPORT_C void NoteOffL(TInt aChannel,TInt aNote,TInt aVelocity);

	IMPORT_C TInt PlaybackRateL() const;

	IMPORT_C void SetPlaybackRateL(TInt aRate);

	IMPORT_C TInt MaxPlaybackRateL() const;

	IMPORT_C TInt MinPlaybackRateL() const;

	IMPORT_C TInt TempoMicroBeatsPerMinuteL() const;

	IMPORT_C void SetTempoL(TInt aMicroBeatsPerMinute);

	IMPORT_C TInt PitchTranspositionCentsL() const;

	IMPORT_C TInt SetPitchTranspositionL(TInt aCents);

	IMPORT_C TTimeIntervalMicroSeconds DurationMicroSecondsL() const;

	IMPORT_C TInt64 DurationMicroBeatsL() const;

	IMPORT_C TInt NumTracksL() const;

	IMPORT_C void SetTrackMuteL(TInt aTrack,TBool aMuted) const;

	IMPORT_C const TDesC8& MimeTypeL();

	IMPORT_C TTimeIntervalMicroSeconds PositionMicroSecondsL() const;

	IMPORT_C void SetPositionMicroSecondsL(const TTimeIntervalMicroSeconds& aPosition);

	IMPORT_C TInt64 PositionMicroBeatsL() const;

	IMPORT_C void SetPositionMicroBeatsL(TInt64 aMicroBeats);

	IMPORT_C void SetSyncUpdateCallbackIntervalL(const TTimeIntervalMicroSeconds& aMicroSeconds, TInt64 aMicroBeats=0);		

	IMPORT_C TInt SendMessageL(const TDesC8& aMidiMessage);

	IMPORT_C TInt SendMessageL(const TDesC8& aMidiMessage,const TTimeIntervalMicroSeconds& aTime);

	IMPORT_C void SendMipMessageL(const RArray<TMipMessageEntry>& aEntry);

	IMPORT_C TInt NumberOfBanksL(TBool aCustom) const;

	IMPORT_C TInt GetBankIdL(TBool aCustom,TInt aBankIndex) const;

	IMPORT_C void LoadCustomBankL(const TDesC& aFileName,TInt& aBankCollectionIndex);

	IMPORT_C void LoadCustomBankDataL(const TDesC8& aBankData,TInt& aBankCollectionIndex);

	IMPORT_C void UnloadCustomBankL(TInt aBankCollectionIndex);

	IMPORT_C TBool CustomBankLoadedL(TInt aBankCollectionIndex) const;

	IMPORT_C void UnloadAllCustomBanksL();

	IMPORT_C TInt NumberOfInstrumentsL(TInt aBankId,TBool aCustom) const;

	IMPORT_C TInt GetInstrumentIdL(TInt aBankId,TBool aCustom,TInt aInstrumentIndex) const;

	IMPORT_C HBufC* InstrumentNameL(TInt aBankId, TBool aCustom, TInt aInstrumentId) const;

	IMPORT_C void GetInstrumentL(TInt aChannel, TInt& aInstrumentId, TInt& aBankId);

	IMPORT_C void SetInstrumentL(TInt aChannel,TInt aBankId,TInt aInstrumentId);

	IMPORT_C void LoadCustomInstrumentL(const TDesC& aFileName,TInt aFileBankId,TInt aFileInstrumentId,TInt aMemoryBankId,TInt aMemoryInstrumentId);

	IMPORT_C void LoadCustomInstrumentDataL(const TDesC8& aInstrumentData, TInt aBankDataId, TInt aInstrumentDataId, TInt aMemoryBankId, TInt aMemoryInstrumentId);

	IMPORT_C void UnloadCustomInstrumentL(TInt aCustomBankId,TInt aInstrumentId);

	IMPORT_C HBufC* PercussionKeyNameL(TInt aNote, TInt aBankId, TBool aCustom, TInt aInstrumentId) const;

	IMPORT_C void StopTimeL(TTimeIntervalMicroSeconds& aStopTime) const;

	IMPORT_C void SetStopTimeL(const TTimeIntervalMicroSeconds& aStopTime);

	IMPORT_C void SetRepeatsL(TInt aRepeatNumberOfTimes, const TTimeIntervalMicroSeconds& aTrailingSilence);

	IMPORT_C TInt GetRepeats() const;

	IMPORT_C TInt PolyphonyL() const;

	IMPORT_C void SetMaxPolyphonyL(TInt aMaxNotes);

	IMPORT_C TInt ChannelsSupportedL() const;

	IMPORT_C TReal32 ChannelVolumeL(TInt aChannel) const;

	IMPORT_C TReal32 MaxChannelVolumeL() const;

	IMPORT_C void SetChannelVolumeL(TInt aChannel,TReal32 aVolumeInDecibels);

	IMPORT_C void SetChannelMuteL(TInt aChannel,TBool aMuted);

	IMPORT_C TInt VolumeL() const;

	IMPORT_C TInt MaxVolumeL() const;

	IMPORT_C void SetVolumeL(TInt aVolume);

	IMPORT_C void SetVolumeRampL(const TTimeIntervalMicroSeconds& aRampDuration);

	IMPORT_C TInt GetBalanceL() const;

	IMPORT_C void SetBalanceL(TInt aBalance = KMMFBalanceCenter);

	IMPORT_C void SetPriorityL(TInt aPriority, TInt aPref);

	IMPORT_C TInt NumberOfMetaDataEntriesL() const;

	IMPORT_C CMMFMetaDataEntry* GetMetaDataEntryL(TInt aMetaDataIndex) const;

/**

 * @deprecated SetBankL is deprecated due to Mobile XMF specification requirement that user instruments (custom instruments) override standard instruments.

 */

	IMPORT_C void SetBankL(TBool aCustom);

	IMPORT_C TBool IsTrackMuteL(TInt aTrack) const;

	IMPORT_C TBool IsChannelMuteL(TInt aChannel) const;

	IMPORT_C void CustomCommandSyncL(const TMMFMessageDestinationPckg& aDestination, TInt aFunction, const TDesC8& aDataTo1, const TDesC8& aDataTo2, TDes8& aDataFrom);

	IMPORT_C void CustomCommandSyncL(const TMMFMessageDestinationPckg& aDestination, TInt aFunction, const TDesC8& aDataTo1, const TDesC8& aDataTo2);

	IMPORT_C void CustomCommandAsync(const TMMFMessageDestinationPckg& aDestination, TInt aFunction, const TDesC8& aDataTo1, const TDesC8& aDataTo2, TDes8& aDataFrom, TRequestStatus& aStatus);

	IMPORT_C void CustomCommandAsync(const TMMFMessageDestinationPckg& aDestination, TInt aFunction, const TDesC8& aDataTo1, const TDesC8& aDataTo2, TRequestStatus& aStatus);

	IMPORT_C TInt MaxPolyphonyL() const;

	IMPORT_C MMMFDRMCustomCommand* GetDRMCustomCommand();

private:

	/**

	 * a pointer to the implementation.

	 */

	CBody* iBody;	

	friend class CBody;

	}; 

#endif