engines/common/Note.h

/*
 * Copyright (c) 2016 Christian Schoenebeck
 *
 * http://www.linuxsampler.org
 *
 * This file is part of LinuxSampler and released under the same terms.
 * See README file for details.
 */ 

#ifndef LS_NOTE_H
#define LS_NOTE_H

#include "../../common/Pool.h"
#include "Event.h"

namespace LinuxSampler {

    /**
     * Abstract base class of its deriving @c Note class, this class (NoteBase)
     * is not intended to be instantiated directly. It just provides access to
     * the parts of a Note object which do not depend on any C++ template
     * parameter.
     */
    class NoteBase {
    public:
        int hostKey; ///< Key on which this is @c Note is allocated on. This is usually the note-on event's note number, however in case of a child note this will rather be the parent note's key instead!
        note_id_t parentNoteID; ///< If not null: unique ID of the parent note of this note (see comments of field @c pChildNotes).
        RTList<note_id_t>* pChildNotes; ///< Note ID list of "child" notes of this note. These are special notes that must be released once this note gets released.
        Event cause; ///< Copy of the original event (usually a note-on event) which caused this note.
        event_id_t eventID; ///< Unique ID of the actual original @c Event which caused this note.
        /// Optional synthesis parameters that might be overridden (by calling real-time instrument script functions like change_vol(), change_pitch(), etc.).
        struct  _Override {
            float Volume;       ///< as linear amplification ratio (1.0 being neutral)
            float Pitch;        ///< as linear frequency ratio (1.0 being neutral)
            float Pan;          ///< between -1.0 (most left) and +1.0 (most right) and 0.0 being neutral.
            int64_t PanSources; ///< Might be used for calculating an average pan value in differential way: amount of times the Pan value had been changed and shall be calculated relatively upon.
        } Override;
        /// Sampler format specific informations and variables.
        union _Format {
            /// Gigasampler/GigaStudio format specifics.
            struct _Gig {
                uint8_t DimMask; ///< May be used to override the Dimension zone to be selected for a new voice: each 1 bit means that respective bit shall be overridden by taking the respective bit from DimBits instead.
                uint8_t DimBits; ///< Used only in conjunction with DimMask: Dimension bits that shall be selected.
            } Gig;
        } Format;
    protected:
        NoteBase() : hostKey(0), parentNoteID(0), pChildNotes(NULL) {
            Override.Volume     = 1.f;
            Override.Pitch      = 1.f;
            Override.Pan        = 0.f;
            Override.PanSources = 0;
            Format = _Format();
        }
    };

    /**
     * Contains the voices caused by one specific note, as well as basic
     * informations about the note itself.
     */
    template<class V>
    class Note : public NoteBase {
    public:
        RTList<V>* pActiveVoices; ///< Contains the active voices associated with this note.

        Note() : NoteBase(), pActiveVoices(NULL) {}

        virtual ~Note() {
            if (pChildNotes) delete pChildNotes;
            if (pActiveVoices) delete pActiveVoices;
        }

        void init(Pool<V>* pVoicePool, Pool<note_id_t>* pNoteIDPool) {
            if (pActiveVoices) delete pActiveVoices;
            pActiveVoices = new RTList<V>(pVoicePool);
            if (pChildNotes) delete pChildNotes;
            pChildNotes = new RTList<note_id_t>(pNoteIDPool);
        }

        void reset() {
            hostKey = 0;
            parentNoteID = 0;
            if (pChildNotes)
                pChildNotes->clear();
            cause = Event();
            eventID = 0;
            Override.Volume     = 1.f;
            Override.Pitch      = 1.f;
            Override.Pan        = 0.f;
            Override.PanSources = 0;
            Format = _Format();
            if (pActiveVoices) {
                typename RTList<V>::Iterator itVoice = pActiveVoices->first();
                typename RTList<V>::Iterator itVoicesEnd = pActiveVoices->end();
                for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
                    itVoice->VoiceFreed();
                }
                pActiveVoices->clear();
            }
        }
    };

} // namespace LinuxSampler

#endif // LS_NOTE_H
1	/*
2	* Copyright (c) 2016 Christian Schoenebeck
3	*
4	* http://www.linuxsampler.org
5	*
6	* This file is part of LinuxSampler and released under the same terms.
7	* See README file for details.
8	*/
9
10	#ifndef LS_NOTE_H
11	#define LS_NOTE_H
12
13	#include "../../common/Pool.h"
14	#include "Event.h"
15
16	namespace LinuxSampler {
17
18	/**
19	* Abstract base class of its deriving @c Note class, this class (NoteBase)
20	* is not intended to be instantiated directly. It just provides access to
21	* the parts of a Note object which do not depend on any C++ template
22	* parameter.
23	*/
24	class NoteBase {
25	public:
26	int hostKey; ///< Key on which this is @c Note is allocated on. This is usually the note-on event's note number, however in case of a child note this will rather be the parent note's key instead!
27	note_id_t parentNoteID; ///< If not null: unique ID of the parent note of this note (see comments of field @c pChildNotes).
28	RTList<note_id_t>* pChildNotes; ///< Note ID list of "child" notes of this note. These are special notes that must be released once this note gets released.
29	Event cause; ///< Copy of the original event (usually a note-on event) which caused this note.
30	event_id_t eventID; ///< Unique ID of the actual original @c Event which caused this note.
31	/// Optional synthesis parameters that might be overridden (by calling real-time instrument script functions like change_vol(), change_pitch(), etc.).
32	struct _Override {
33	float Volume; ///< as linear amplification ratio (1.0 being neutral)
34	float Pitch; ///< as linear frequency ratio (1.0 being neutral)
35	float Pan; ///< between -1.0 (most left) and +1.0 (most right) and 0.0 being neutral.
36	int64_t PanSources; ///< Might be used for calculating an average pan value in differential way: amount of times the Pan value had been changed and shall be calculated relatively upon.
37	} Override;
38	/// Sampler format specific informations and variables.
39	union _Format {
40	/// Gigasampler/GigaStudio format specifics.
41	struct _Gig {
42	uint8_t DimMask; ///< May be used to override the Dimension zone to be selected for a new voice: each 1 bit means that respective bit shall be overridden by taking the respective bit from DimBits instead.
43	uint8_t DimBits; ///< Used only in conjunction with DimMask: Dimension bits that shall be selected.
44	} Gig;
45	} Format;
46	protected:
47	NoteBase() : hostKey(0), parentNoteID(0), pChildNotes(NULL) {
48	Override.Volume = 1.f;
49	Override.Pitch = 1.f;
50	Override.Pan = 0.f;
51	Override.PanSources = 0;
52	Format = _Format();
53	}
54	};
55
56	/**
57	* Contains the voices caused by one specific note, as well as basic
58	* informations about the note itself.
59	*/
60	template<class V>
61	class Note : public NoteBase {
62	public:
63	RTList<V>* pActiveVoices; ///< Contains the active voices associated with this note.
64
65	Note() : NoteBase(), pActiveVoices(NULL) {}
66
67	virtual ~Note() {
68	if (pChildNotes) delete pChildNotes;
69	if (pActiveVoices) delete pActiveVoices;
70	}
71
72	void init(Pool<V>* pVoicePool, Pool<note_id_t>* pNoteIDPool) {
73	if (pActiveVoices) delete pActiveVoices;
74	pActiveVoices = new RTList<V>(pVoicePool);
75	if (pChildNotes) delete pChildNotes;
76	pChildNotes = new RTList<note_id_t>(pNoteIDPool);
77	}
78
79	void reset() {
80	hostKey = 0;
81	parentNoteID = 0;
82	if (pChildNotes)
83	pChildNotes->clear();
84	cause = Event();
85	eventID = 0;
86	Override.Volume = 1.f;
87	Override.Pitch = 1.f;
88	Override.Pan = 0.f;
89	Override.PanSources = 0;
90	Format = _Format();
91	if (pActiveVoices) {
92	typename RTList<V>::Iterator itVoice = pActiveVoices->first();
93	typename RTList<V>::Iterator itVoicesEnd = pActiveVoices->end();
94	for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
95	itVoice->VoiceFreed();
96	}
97	pActiveVoices->clear();
98	}
99	}
100	};
101
102	} // namespace LinuxSampler
103
104	#endif // LS_NOTE_H