lmms/include/note_play_handle.h

/*
 * note_play_handle.h - declaration of class notePlayHandle which is needed
 *                      by LMMS-Play-Engine
 *
 * Copyright (c) 2004-2010 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 * 
 * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */


#ifndef _NOTE_PLAY_HANDLE_H
#define _NOTE_PLAY_HANDLE_H

#include "lmmsconfig.h"
#include "mixer.h"
#include "note.h"
#include "engine.h"
#include "track.h"


class InstrumentTrack;
class notePlayHandle;

template<ch_cnt_t=DEFAULT_CHANNELS> class basicFilters;
typedef QList<notePlayHandle *> NotePlayHandleList;
typedef QList<const notePlayHandle *> ConstNotePlayHandleList;


class EXPORT notePlayHandle : public playHandle, public note
{
public:
	void * m_pluginData;
	basicFilters<> * m_filter;

	notePlayHandle( InstrumentTrack * _instrument_track,
					const f_cnt_t _offset,
					const f_cnt_t _frames, const note & _n,
					notePlayHandle * _parent = NULL,
					const bool _part_of_arp = false );
	virtual ~notePlayHandle();

	virtual void setVolume( const volume_t _volume = DefaultVolume );

	int midiVelocity() const;
	int midiKey() const;

	const float & frequency() const
	{
		return m_frequency;
	}

	void updateFrequency();

	// returns frequency without pitch-wheel influence
	float unpitchedFrequency() const
	{
		return m_unpitchedFrequency;
	}

	virtual void play( sampleFrame * _working_buffer );

	virtual inline bool done() const
	{
		return m_released && framesLeft() <= 0;
	}

	f_cnt_t framesLeft() const;

	inline fpp_t framesLeftForCurrentPeriod() const
	{
		return (fpp_t) qMin<f_cnt_t>( framesLeft(),
										engine::getMixer()->framesPerPeriod() );
	}


	virtual bool isFromTrack( const track * _track ) const;


	void noteOff( const f_cnt_t _s = 0 );

	inline f_cnt_t framesBeforeRelease() const
	{
		return m_framesBeforeRelease;
	}

	inline f_cnt_t releaseFramesDone() const
	{
		return m_releaseFramesDone;
	}

	f_cnt_t actualReleaseFramesToDo() const;


	// returns total numbers of frames to play
	inline f_cnt_t frames() const
	{
		return m_frames;
	}

	void setFrames( const f_cnt_t _frames );

	// returns whether note was released
	inline bool released() const
	{
		return m_released;
	}

	// returns total numbers of played frames
	inline f_cnt_t totalFramesPlayed() const
	{
		return m_totalFramesPlayed;
	}

	// returns volume-level at frame _frame (envelope/LFO)
	float volumeLevel( const f_cnt_t _frame );

	// returns instrument-track this note-play-handle plays
	const InstrumentTrack *instrumentTrack() const
	{
		return m_instrumentTrack;
	}

	InstrumentTrack *instrumentTrack()
	{
		return m_instrumentTrack;
	}

	// returns whether note is a top note, e.g. is not part of an arpeggio
	// or a chord
	inline bool isTopNote() const
	{
		return m_topNote;
	}

	inline bool isPartOfArpeggio() const
	{
		return m_partOfArpeggio;
	}

	inline void setPartOfArpeggio( const bool _on )
	{
		m_partOfArpeggio = _on;
	}

	// returns whether note is base-note for arpeggio
	bool isArpeggioBaseNote() const;

	inline bool isMuted() const
	{
		return m_muted;
	}

	void mute();

	// returns index of note-play-handle in vector of note-play-handles 
	// belonging to this instrument-track - used by arpeggiator
	int index() const;

	// note-play-handles belonging to given channel, if _all_ph = true,
	// also released note-play-handles are returned
	static ConstNotePlayHandleList nphsOfInstrumentTrack(
			const InstrumentTrack * _ct, bool _all_ph = false );

	// return whether given note-play-handle is equal to *this
	bool operator==( const notePlayHandle & _nph ) const;

	inline bool bbTrackMuted()
	{
		return m_bbTrack && m_bbTrack->isMuted();
	}
	void setBBTrack( track * _bb_track )
	{
		m_bbTrack = _bb_track;
	}

	void processMidiTime( const midiTime & _time );
	void resize( const bpm_t _new_tempo );

#ifdef LMMS_SINGERBOT_SUPPORT
	int patternIndex()
	{
		return m_patternIndex;
	}

	void setPatternIndex( int _i )
	{
		m_patternIndex = _i;
	}
#endif


private:
	class BaseDetuning
	{
	public:
		BaseDetuning( DetuningHelper *detuning );

		void setValue( float val )
		{
			m_value = val;
		}

		float value() const
		{
			return m_value;
		}


	private:
		DetuningHelper * m_detuning;
		float m_value;

	} ;

	InstrumentTrack * m_instrumentTrack;	// needed for calling
											// InstrumentTrack::playNote
	f_cnt_t m_frames;						// total frames to play
	f_cnt_t m_totalFramesPlayed;			// total frame-counter - used for
											// figuring out whether a whole note
											// has been played
	f_cnt_t m_framesBeforeRelease;			// number of frames after which note
											// is released
	f_cnt_t m_releaseFramesToDo;			// total numbers of frames to be
											// played after release
	f_cnt_t m_releaseFramesDone;			// number of frames done after
											// release of note
	NotePlayHandleList m_subNotes;			// used for chords and arpeggios
	volatile bool m_released;				// indicates whether note is released
	bool m_topNote;							// indicates whether note is a
											// base-note (i.e. no sub-note)
	bool m_partOfArpeggio;					// indicates whether note is part of
											// an arpeggio (either base-note or
											// sub-note)
	bool m_muted;							// indicates whether note is muted
	track * m_bbTrack;						// related BB track
#ifdef LMMS_SINGERBOT_SUPPORT
	int m_patternIndex;						// position among relevant notes
#endif

	// tempo reaction
	bpm_t m_origTempo;						// original tempo
	f_cnt_t m_origFrames;					// original m_frames

	int m_origBaseNote;

	float m_frequency;
	float m_unpitchedFrequency;

	BaseDetuning * m_baseDetuning;

} ;

#endif