OpenShot Library | libopenshot-audio 0.2.0
juce_MPENote.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23namespace juce
24{
25
26namespace
27{
28 uint16 generateNoteID (int midiChannel, int midiNoteNumber) noexcept
29 {
30 jassert (midiChannel > 0 && midiChannel <= 16);
31 jassert (midiNoteNumber >= 0 && midiNoteNumber < 128);
32
33 return uint16 ((midiChannel << 7) + midiNoteNumber);
34 }
35}
36
37//==============================================================================
39 int initialNote_,
46 midiChannel (uint8 (midiChannel_)),
47 initialNote (uint8 (initialNote_)),
48 noteOnVelocity (noteOnVelocity_),
49 pitchbend (pitchbend_),
50 pressure (pressure_),
51 initialTimbre (timbre_),
52 timbre (timbre_),
53 keyState (keyState_)
54{
55 jassert (keyState != MPENote::off);
56 jassert (isValid());
57}
58
60
61//==============================================================================
63{
64 return midiChannel > 0 && midiChannel <= 16 && initialNote < 128;
65}
66
67//==============================================================================
68double MPENote::getFrequencyInHertz (double frequencyOfA) const noexcept
69{
70 auto pitchInSemitones = double (initialNote) + totalPitchbendInSemitones;
71 return frequencyOfA * std::pow (2.0, (pitchInSemitones - 69.0) / 12.0);
72}
73
74//==============================================================================
75bool MPENote::operator== (const MPENote& other) const noexcept
76{
77 jassert (isValid() && other.isValid());
78 return noteID == other.noteID;
79}
80
81bool MPENote::operator!= (const MPENote& other) const noexcept
82{
83 jassert (isValid() && other.isValid());
84 return noteID != other.noteID;
85}
86
87//==============================================================================
88//==============================================================================
89#if JUCE_UNIT_TESTS
90
91class MPENoteTests : public UnitTest
92{
93public:
94 MPENoteTests() : UnitTest ("MPENote class", "MIDI/MPE") {}
95
96 //==============================================================================
97 void runTest() override
98 {
99 beginTest ("getFrequencyInHertz");
100 {
101 MPENote note;
102 note.initialNote = 60;
103 note.totalPitchbendInSemitones = -0.5;
104 expectEqualsWithinOneCent (note.getFrequencyInHertz(), 254.178);
105 }
106 }
107
108private:
109 //==============================================================================
112 {
114 double oneCent = 1.0005946;
115 expect (ratio < oneCent);
116 expect (ratio > 1.0 / oneCent);
117 }
118};
119
120static MPENoteTests MPENoteUnitTests;
121
122#endif // JUCE_UNIT_TESTS
123
124} // namespace juce
Holds a resizable array of primitive or copy-by-value objects.
Definition juce_Array.h:60
Array()=default
Creates an empty array.
This class represents a single value for any of the MPE dimensions of control.
This is a base class for classes that perform a unit test.
This struct represents a playing MPE note.
KeyState
Possible values for the note key state.
@ off
The key is up (off).
uint8 initialNote
The MIDI note number that was sent when the note was triggered.
double getFrequencyInHertz(double frequencyOfA=440.0) const noexcept
Returns the current frequency of the note in Hertz.
MPENote() noexcept
Default constructor.
bool operator!=(const MPENote &other) const noexcept
Returns true if two notes are different notes, determined by their unique ID.
uint8 midiChannel
The MIDI channel which this note uses.
bool isValid() const noexcept
Checks whether the MPE note is valid.
bool operator==(const MPENote &other) const noexcept
Returns true if two notes are the same, determined by their unique ID.